CN105925267A - Sustained-release oxidizing agent taking calcium peroxide as matrix and ethyl cellulose as coating and preparation method thereof - Google Patents
Sustained-release oxidizing agent taking calcium peroxide as matrix and ethyl cellulose as coating and preparation method thereof Download PDFInfo
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- CN105925267A CN105925267A CN201610229170.6A CN201610229170A CN105925267A CN 105925267 A CN105925267 A CN 105925267A CN 201610229170 A CN201610229170 A CN 201610229170A CN 105925267 A CN105925267 A CN 105925267A
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- calcium peroxide
- ethyl cellulose
- calper calcium
- peplos
- attapulgite
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2101/00—Agricultural use
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a sustained-release oxidizing agent taking calcium peroxide as the matrix and ethyl cellulose as the coating and a preparation method thereof. The oxidizing agent is prepared from calcium peroxide (60%), a binding agent, attapulgite, and ethyl cellulose according to a certain ratio. The preparation method comprises the following steps: step A, evenly mixing calcium peroxide (60%), a binding agent, and attapulgite, and granulating the mixture to obtain particles with a size of 3 to 5 mm; step B, according to the weight of particles obtained in the step A, supplying enough ethyl cellulose, coating particles by ethyl cellulose, and drying to obtain the sustained-release oxidizing agent. The formula is reasonable, the method is feasible, and the operation is simple. The problem that calcium peroxide releases oxygen in gleying paddy fields in a short period is solved, the growth environment for paddy rice in gleying paddy fields is improved; after calcium peroxide is coated by ethyl cellulose, the oxygen release time is prolonged to 100 days or more, and, compared with that of calcium peroxide powder, the oxygen release time is prolonged by 58 days or more, in other words 1.4 times or more. The oxidizing agent has a great popularization and application value in the middle and lower reaches, which have many glyeing paddy fields, of Changjiang River.
Description
Technical field
The invention belongs to Agro-ecology, soil improvement regulates and controls field with plant nutrient, and be more particularly to is a kind of with mistake
Calcium oxide be substrate, ethyl cellulose be the slow-release oxygen agent of peplos, also relate to a kind of with calper calcium peroxide for substrate ethyl
Cellulose is the preparation method of the slow-release oxygen agent of peplos, and this slow-release oxygen agent can effectively cut down the poisonous reproducibility in gleying rice field
Material, and can be Oryza sativa L. oxygen supply, moreover it is possible to improve acid gleying paddy soil pH, improve gleying paddy rice growing environment,
The slow-release oxygen agent of preparation is applicable to the improvement in gleying rice field during the Rice Cropping in vast gleying rice district.
Background technology
Gleyic paddysoil is the modal low-yield land of south China, is distributed widely in Plain Lake and hills and rushes ridge, accounts for
The 1/3 of paddy fields in south china area, and the rice field area in recent years threatened by gleying has the trend of substantially expansion.Gleyic paddysoil by
In being in low-lying landform positions, the long-term accumulated water of soil (or backwater), water-cooled mud temperature is low, poisonous, deleterious reduction material accumulation,
Nutrient Transformation is slow, it is suppressed that the growth of rice root and the absorption to soil nutrient thereof, thus seriously restricts rice high yield.As
What efficiently utilizes gleying rice field, is not only related to China's grain-production, is also related to " amphitypy society " and builds, simultaneously to region
Agriculture and socioeconomic sustainable development is significant.
The Crack cause of gleying rice soil, is first that permeability is bad, next to that a large amount of decomposable asymmetric choice net aerobic substance exists,
Being impeded drainage again, cropping system is improper.Gleying rice soil maximum feature is also soil anoxia.Having of gley paddy soil
Although machine matter is accumulated more, but decomposing slowly, mineralization is more weak.Due to anoxia, cause the reducing substances in paddy soil
Accumulation, such as hydrogen sulfide, small molecular organic acid, the bivalence Fe and Mn etc. of excess, all has greatly rice root growth and Nutrient Absorption
Adverse effect, its to rice root poison reflection be morphologically radical reduce, root system shortens, and distribution reduces, black root
Number increases.Physiologically it is mainly the normal aerobic respiration of block cell pigment oxidation enzyme system, thus affects the normal merit of root system
Can play.Gleization result make reducing substances and ferrous ion accumulation, partial cation is replaced out, accelerate ferrum, calcium,
Phosphorus, potassium, the leaching loss of silicon, cause incobation loss of soil nutrient and degeneration.
Oryza sativa L. normal growth needs sufficient oxygen.The eighties in last century, Japanese scholars Shigeru takes the lead in Oryza sativa L. oxygen
Demand carries out quantitative study, and determines water planting Rice under Condition different growing oxygen demand: tillering stage be 0.27～
0.79mg/ (g h), the jointing stage is 0.95～0.88mg/ (g h), and boot stage is 0.98～1.07mg/ (g h), heading stage
For 0.93mg/ (g h), full heading time is 0.85mg/ (g h), and the period of maturation is 0.68mg/ (g h).The research such as wangdan English is thought
Heading stage is the period that paddy growth oxygen demand is maximum.Soil oxygen concentration is supervised under field condition by Pezeshki etc.
Surveying, result shows, guarantee rice root when oxygen concentration relative atmospheric oxygen content is at least maintained at 3～5% in paddy soil
Normal absorption to oxygen.Therefore, under existing cultivation step, gleying paddy rice easily occurs anoxia to coerce.This is because it is latent
The severe depletion of oxygen of educating rice field, causes the reducing substances in paddy soil such as hydrogen sulfide, small molecular organic acid and the two of excess
The accumulation of valency Fe and Mn etc., causes Root Growth of Rice to be obstructed, and improving activity of root system is poor, root system senilism, limit root system to N, P,
The absorption of the nutrients such as K；Causing under anoxia condition, Oryza sativa L. effective tillering is few, sword-like leave chlorophyll content and SOD activity decrease speed
Hurry up, photosynthesis is obstructed, and dry-matter accumulation reduces, and finally causes grouting insufficient, and setting percentage is relatively low, thus reduces Oryza sativa L. product
Amount.
At present, eliminate or alleviate the measure of rice field gleying and mainly build water conservancy projects, drain flooded fields in time, eliminate stain evil；Secondly
It is that the farming Land use systems changing rice field (as used duck-raising enclosed paddy fields, breeding fish, is planted the industrial crops such as Corm Eleocharitis, or implemented floods and droughts
Crop rotation)；It is the rational application of fertilizer again.But the effect of above-mentioned artificial ameliorative measure is all temporary transient, because causing the gas of rice field gleying
Waiting and geographical environment does not change, therefore, existing technical measures cannot meet the long-term needs of gleying rice field improvement.In a large number
Result of study shows, uses calper calcium peroxide oxidant, can effectively cut down soil reduction process material, improve soil pH, and can also be
Crop supply oxygen, activating soil organic carbon.But calper calcium peroxide oxygen release time in gleying rice field is shorter, it is impossible to meet Oryza sativa L.
The fertility middle and late stage demand to oxygen.The present patent application person is for the key factor reduction of restriction Gleyic paddysoil crop yield
Material, the slow release calper calcium peroxide of Gleyic paddysoil soil reduction process material is effectively cut down in initiative.This technology with calper calcium peroxide as core,
Select suitable binding agent and peplos agent, use ethyl cellulose coated slow-release calper calcium peroxide and suitable production technology, it is thus achieved that
Oxygen release time of slow-release oxygen agent product up to more than 100 days, gleying paddy rice time of infertility can be met to oxygen
Demand, and improve acid gleying paddy soil pH.
Summary of the invention
It is an object of the invention to there are provided a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen as peplos
Agent, this slow-release oxygen agent includes 60% calper calcium peroxide, binding agent, attapulgite, ethyl cellulose, by reasonable disposition raw material
Quantity and ratio, can effectively solve calper calcium peroxide oxygen release matter of time in gleying rice field, thus improve gleying rice field
Paddy growth environment, this slow-release oxygen agent has common oxidizer without comparable in terms of the improvement of the acid gleying rice soil in south
The superiority intended, raw material sources are extensive, and processing technique is easy, and operational approach is easy, and popularizing application prospect is wide.
Another object of the present invention there are provided a kind of with calper calcium peroxide for substrate ethyl cellulose as peplos
The preparation method of slow-release oxygen agent, simple to operate, easy to implement the method.
In order to realize above-mentioned purpose, the present invention uses techniques below measure:
A kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material of following weight portion
Make:
Described calper calcium peroxide raw material, for a kind of industrial products, is produced by calcium hydroxide method and obtains, its calper calcium peroxide content
About 60%, calcium hydroxide content about 38%, calcium carbonate content about 2%, it is alkalescence that calcium hydroxide is dissolved in water, and being applied to soil can carry
High soil pH, its chemical formula is Ca (OH)2, it accounts for 24～38% of gross mass in inventive formulation；Calcium carbonate is applied to soil
Also can improve soil pH, its chemical formula is CaCO3, it accounts for 1～2% of gross mass in inventive formulation；Calper calcium peroxide is a kind of
Conventional oxidant, is dissolved in water and in alkalescence and slowly releases oxygen, be applied to gleying rice field, can eliminate gleying rice field
Poisonous reducing substances, can grow oxygen supply for gleying paddy rice, and improve acid gleying paddy soil pH, and its chemical formula is
CaO2, it accounts for 39～60% of gross mass in inventive formulation；
Described binding agent raw material (Mingguang City Xing Xin mining industry company limited), for a kind of industrial products, is the one of starch
Derivant, has stronger viscosity after being dissolved in water, each component bonding in calper calcium peroxide raw material can be got up, make pelletize consolidation, and it accounts for
In inventive formulation the 0.1～10% of gross mass.In calper calcium peroxide granulation process, can be without binding agent raw material, pelletize
Effect and interpolation are the most suitable；
Described attapulgite raw material, is a kind of clay mineral with attapulgite as key component, crosses 200～300 mesh
Sieve, its preferable chemical molecular formula is: Mg5Si8O20(OH)2(OH2)4·4H2O, containing variable amount of Na in crystal+、Ca2+、Fe3 +、Al3+Plasma, has certain plasticity and cohesive force, is commonly used for fertilizer binding agent, and it accounts for gross mass in inventive formulation
0.1～10%.In calper calcium peroxide granulation process, can be without attapulgite raw material, granulation outcome and the basic phase of interpolation
When；
Described ethyl cellulose, also known as cellulosic ether, is called for short EC, for white or grayish mobility powder, is
A kind of semi-synthetic macromolecule, odorless, the most water insoluble, and it is dissolved in different organic solvents, such as alcohol and aromatic hydrocarbons, heat stability
Good, during burning, ash is extremely low, seldom has adhesion sense or astringent, can generate tough and tensile thin film, remains to keep flexibility when low temperature, soft
Changing point is 135～155 DEG C, and fusing point is 165～185 DEG C, molecular composition and structural formula: [C6H7O2 (OC2H5) 3] n；This product without
Poison, has an extremely strong antibiont performance, metabolism inertia, but in the sun or oxidative degradation easily occurs under ultraviolet light；It is mainly used as sheet
Agent binding agent and thin film coating material etc., it is possible to as framework material blocker, prepare polytype matrix sustained release tablet, be used as
Slow-releasing microcapsule prepared by encapsulation adjuvant, makes drug effect sustained release, it is to avoid some water soluble drugs occur to early effect, it is also possible to be used for
Various pharmaceutical dosage forms are made dispersant, stabilizer, water-retaining agent, prevents medicine from becoming damp rotten, promote the safe storage of tablet；Herein
As thin film coating material, it accounts for 0.1～10% of gross mass in inventive formulation.
A kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material of following weight portion
Make (preferable scope):
A kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material of following weight portion
Make (good scope):
A kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material of following weight portion
Make (optimum):
A kind of with calper calcium peroxide for the preparation method of the substrate ethyl cellulose slow-release oxygen agent as peplos, the steps include:
A.60% the former granulation for powders of calper calcium peroxide:
1. seediness: adjusting granulating disc (model: ZL10) disk inclination angle to 58～62 °, rotating speed is adjusted to 30r/
Min, heating apparatus (2KW universal electric furnace, Omron industrial temperature control device E5CZ-R2MT and PT100 thermal resistance assembly) is adjusted to 40
～50 DEG C；Take the former powder of 1kg calper calcium peroxide, be divided into 9～11 equal portions, take portion and put to disk, quickly use water smoke to be moistened
Wet and play granule, granule particle diameter about 0.5mm, take out stand-by, repeat abovementioned steps 5～15 times, to 9～11 parts of whole seediness of powder
Complete.
2. pelletize: adjust granulating disc disk inclination angle to 58～62 °, rotating speed is adjusted to 30r/min, and heating apparatus is adjusted
To 40～50 DEG C, open dehumidifying blower unit (model: Y5-47-4C-3KW)；By step 1. in seediness is complete powder whole
Put into granulating disc, take the former powder of 4kg calper calcium peroxide and put in oscillating feeder (model: GZV1), with 100g/min at the uniform velocity
Put into powder, adjust water fog spraying gun (model: W-77S) in disk at the highest whereabouts of powder 28～32cm place, to fall reflux
Material sprays, and water-spraying amount is adjusted to 16mL/min；Constantly take out calper calcium peroxide granule, sieve, playback, it is desirable to size
3～about 5mm, until the whole pelletize of powder is complete.
3. dry: take out the calper calcium peroxide granule having made grain, put to baking oven 104～106 DEG C of temperature greyish white down to outward appearance
(about 3h)；Taking-up is cooled to 50～60 DEG C, seals, and stores in dark.
B. calper calcium peroxide particle envelope:
1. the preparation of end spray fluidized-bed coating machine: open end spray fluidized-bed coating machine (model: DLB-5), preheat end jet flow
Change bed seed-coating machine import air inducing temperature to 100 DEG C.
2. the preparation of coating liquid: weigh ethyl cellulose 61.90g, is progressively dissolved in the dehydrated alcohol that consumption is 20～40%,
Being stirred continuously, until thoroughly dissolving, making coating liquid.
3. peplos: weigh the calper calcium peroxide granule 2000.00g having made grain, and put into end spray fluidized-bed coating machine, adjust
Air-introduced machine air quantity is to 2800m3/ h, fluid bed inlet air inducing temperature 98～102 DEG C, granule is preheated 8～12 minutes；Use piston
Oil cylinder (model: CX-LA 40 × 50) extraction step 2. in coating liquid, keep the end spray fluidized-bed coating machine at the bottom of jet flow amount be
10mL/min, end spray pneumatics 0.2MPa, stop-spraying is not spilt, until coating liquid spraying is complete.
4. it is dried: the end spraying fluidized-bed coating machine intake air temperature and is adjusted to 78～82 DEG C, air-introduced machine air quantity is adjusted to 1680m3/
H, is dried 8～12min to coated granule in end spray fluid bed；Close end spray fluidized-bed coating machine warming-up device, keep
Air-introduced machine air quantity is constant, coated granule in fluid bed is cooled to room temperature, and takes out coated granule, standby.
Utilize formula that the present invention provides and the slow-release oxygen agent that preparation method prepares, its oxygen release time up to 100 days with
On.
The present invention compared with prior art, has the following advantages and effect:
A. by consulting literatures and the assay of patent and service condition, specify that calper calcium peroxide is as slow-release oxygen agent
In the use in gleying rice field, have that the oxygen release time is too short and the uncontrollable defect of oxygen release speed, therefore have employed peplos skill
Art, and determine selected with calper calcium peroxide be the substrate ethyl cellulose slow-release oxygen agent as peplos techniqueflow and every skill
Art parameter, lays a good foundation for the exploitation Multifucntional oxidant with calper calcium peroxide as substrate.
Product the most of the present invention passes through reasonable disposition 60% calper calcium peroxide, binding agent, attapulgite, ethyl cellulose etc. four kinds
The quantity of raw material and ratio, design the solution culture carried out according to control experiment, and after testing, slow release calper calcium peroxide oxidant is at water
Oxygen release concentration in training is relatively mild, not only ensure that active oxygen can and slowly discharge, than the calcium peroxide powder oxygen release time
Extend more than 1.4 times, but also water body pH can be improved, can effectively solve calper calcium peroxide oxygen release time in gleying rice field
Problem, thus improve gleying paddy rice growing environment, this slow-release oxygen agent is the improvement of acid gleying rice soil in south
Aspect has the unrivaled superiority of common oxidizer.
C. the raw material sources of the present invention are extensive, and processing technique is easy, and operational approach is easy, and popularizing application prospect is wide.
Accompanying drawing explanation
Fig. 1 is a kind of water, calcium peroxide powder, non-peplos calper calcium peroxide granule, the leaching of ethyl cellulose peplos calper calcium peroxide
Go out liquid active o content change schematic diagram.The mensuration sustained release performance to coated slow-release oxidant of dissolution in water is used to be evaluated,
I.e. weigh oxidizing agent pellets about 2g, be put in homemade 300 mesh filter cloth bags, filter cloth bag be placed in 250mL ground conical flask, add
Enter 250mL distilled water, then conical flask is put in 25 DEG C of constant incubators cultivate, respectively the 1d cultivated, 2d, 3d,
4d, 7d, 10d, 14d, 21d, and later every 7d, until 100d, extract whole lixiviating solution, past conical flask after extracting lixiviating solution
In add the distilled water of 250mL, continue to cultivate, extraction.Lixiviating solution, after fully mixing, standing, measures dissolved in filtrate activity
The content of oxygen, draws the relation curve of active oxygen gas stripping quantity and water logging time.Often group experiment is repeated 3 times and carries out parallel assay.
Measure in strict accordance with Hash HQ30d portable dissolved oxygen measuring instrument and pH analyzer working specification, it should be noted that activity in water
The content of oxygen and temperature are negative correlation, and temperature is very big on the content impact of active oxygen in water, therefore, cultivates and mensuration is both needed to 25
Carry out under conditions of DEG C.
Fig. 1 shows, compared with calcium peroxide powder, and ethyl cellulose peplos calper calcium peroxide Active oxygen release time lengthening
More than 58 days,
And oxygen release curve ratio calcium peroxide powder and non-peplos calper calcium peroxide granule the mildest.
Fig. 2 is a kind of water, calcium peroxide powder, non-peplos calper calcium peroxide granule, the leaching of ethyl cellulose peplos calper calcium peroxide
Go out liquid pH and change schematic diagram.Figure it is seen that ethyl cellulose peplos calper calcium peroxide leachate pH change curve compares peroxidating
Calcium powder and non-peplos calper calcium peroxide granule leachate pH change curve are the mildest.
Detailed description of the invention
Embodiment 1:
A kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material of following weight portion
Make (optimum):
A kind of with calper calcium peroxide for the preparation method of the substrate ethyl cellulose slow-release oxygen agent as peplos, the steps include:
A.60% the former granulation for powders of calper calcium peroxide:
1. seediness: adjusting granulating disc disk inclination angle to 60 °, rotating speed is adjusted to 30r/min, and heating apparatus is adjusted to 40
～50 DEG C；Take the former powder of 1kg calper calcium peroxide, be divided into 10 equal portions, take portion and put to disk, quickly use water smoke by its moistening also
Playing granule, granule particle diameter about 0.5mm, take out stand-by, repetition abovementioned steps 5 or 6 or 8 or 10 or 15 or 20 times, to 10 parts of powders
All seediness is complete.
2. pelletize: adjusting granulating disc disk inclination angle to 60 °, rotating speed is adjusted to 30r/min, and heating apparatus is adjusted to 40
～50 DEG C, open dehumidifying blower unit；By step 1. in seediness is complete powder all put into granulating disc, take 4kg mistake
The former powder of calcium oxide is put in oscillating feeder, at the uniform velocity puts into powder with 100g/min, adjusts water fog spraying gun powder in disk
At the highest whereabouts at 30cm, to falling, backflow material sprays, and water-spraying amount is adjusted to 16mL/min；Constantly take out calper calcium peroxide
Granule, sieves, playback, it is desirable to size is at about 4mm, until the whole pelletize of powder is complete.
3. dry: take out the calper calcium peroxide granule having made grain, put to baking oven 105 DEG C of temperature greyish white (about down to outward appearance
3h)；Taking-up is cooled to 50～60 DEG C, seals, and stores in dark.
B. calper calcium peroxide particle envelope:
1. the preparation of end spray fluidized-bed coating machine: open end spray fluidized-bed coating machine, spray fluidized-bed coating machine in the preheating end enters
Mouth air inducing temperature is to 100 DEG C.
2. the preparation of coating liquid: weigh ethyl cellulose 61.90g, is progressively dissolved in the dehydrated alcohol that consumption is 20～40%,
Being stirred continuously, until thoroughly dissolving, making coating liquid.
3. peplos: weigh the calper calcium peroxide granule 2000.00g having made grain, and put into end spray fluidized-bed coating machine, adjust
Air-introduced machine air quantity is to 2800m3/ h, fluid bed inlet air inducing temperature 100 DEG C, granule is preheated 10 minutes；Use piston oil-cylinder is taken out
Take step 2. in coating liquid, keep the end spray fluidized-bed coating machine at the bottom of jet flow amount be 10mL/min, the end spray pneumatics 0.2MPa, do not stop
Spray, until coating liquid spraying is complete.
4. it is dried: the end spraying fluidized-bed coating machine intake air temperature and is adjusted to 80 DEG C, air-introduced machine air quantity is adjusted to 1680m3/ h is right
In end spray fluid bed, coated granule is dried 10min；Close end spray fluidized-bed coating machine warming-up device, keep air-introduced machine wind
Measure constant, coated granule in fluid bed is cooled to room temperature, and takes out coated granule, standby.
A kind of with calper calcium peroxide for the slow-release oxygen agent pelletize as peplos of the substrate ethyl cellulose and peplos during peroxide
Change calcium loss assessment:
In this research, the pelletize of the calcium peroxide powder of 60% is carried out in a heated state, and has sprayed a certain amount of
Water, the calper calcium peroxide in raw material can be caused certain loss, this is the main loss approach of calper calcium peroxide, meanwhile, peplos
Carry out in a heated state, it is also possible to cause the loss of calper calcium peroxide.This research calper calcium peroxide in granulation process only loses
7.9%, after peplos, calper calcium peroxide total losses amount is 8.6% (table 1).
The loss amount of calper calcium peroxide in this patent, records when developing slow release calper calcium peroxide in the lab, if work
Under the conditions of industryization is produced in enormous quantities, the loss of calper calcium peroxide can also reduce further.
Calper calcium peroxide changes of contents after table 1 pelletize and peplos
A kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material of following weight portion
Make:
Its preparation method is same as in Example 1.
Claims (8)
1., with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, it is by the raw material system of following weight portion
Become:
Parts by weight of raw materials
60% calper calcium peroxide 74.00 ~ 99.50
Binding agent 0.10 ~ 8.00
Attapulgite 0.10 ~ 8.00
Ethyl cellulose 0.50 ~ 10.00
Described calper calcium peroxide content 60%, calcium hydroxide content 38%, calcium carbonate content 2%, it is alkalescence that calcium hydroxide is dissolved in water, executes
Soil pH can be improved for soil, account for the 24 ~ 38% of gross mass；Calcium carbonate is applied to soil also can improve soil pH, accounts for gross mass
1 ~ 2%；Calper calcium peroxide is a kind of oxidant, is dissolved in water and in alkalescence and slowly releases oxygen, is applied to gleying rice field, accounts for
The 39 ~ 60% of gross mass；
Described binding agent is a kind of derivant of starch, each component bonding in calper calcium peroxide raw material is got up, accounts for gross mass
0.1~10%；
Described attapulgite is a kind of clay mineral, crosses 200 ~ 300 mesh sieves, accounts for the 0.1 ~ 10% of gross mass；
Described ethyl cellulose is white or grayish mobility powder, is a kind of semi-synthetic macromolecule, and odorless does not dissolves in
Water, accounts for the 0.1 ~ 10% of gross mass.
The most according to claim 1 a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, its
It is characterised by:
Parts by weight of raw materials
60% calper calcium peroxide 82.00 ~ 98.00
Binding agent 0.40 ~ 5.00
Attapulgite 0.40 ~ 5.00
Ethyl cellulose 1.50 ~ 8.00.
The most according to claim 1 a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, its
It is characterised by:
Parts by weight of raw materials
60% calper calcium peroxide 91.00 ~ 96.00
Binding agent 1.00 ~ 2.00
Attapulgite 1.00 ~ 2.00
Ethyl cellulose 2.50 ~ 5.00.
The most according to claim 1 a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, its
It is characterised by:
Parts by weight of raw materials
60% calper calcium peroxide 95.60
Viscous stick 0.60
Attapulgite 0.60
Ethyl cellulose 3.20.
The most according to claim 1 a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, its
It is characterised by:
Parts by weight of raw materials
60% calper calcium peroxide 96.80
Viscous stick 0.10
Attapulgite 0.10
Ethyl cellulose 3.00.
The most according to claim 1 a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, its
It is characterised by:
Parts by weight of raw materials
60% calper calcium peroxide 87.00
Viscous stick 7.00
Attapulgite 5.00
Ethyl cellulose 1.00.
The most according to claim 1 a kind of with calper calcium peroxide for the substrate ethyl cellulose slow-release oxygen agent as peplos, its
It is characterised by:
Parts by weight of raw materials
60% calper calcium peroxide 88.00
Viscous stick 1.00
Attapulgite 3.00
Ethyl cellulose 8.00.
8., with calper calcium peroxide for a preparation method for the substrate ethyl cellulose slow-release oxygen agent as peplos, the steps include:
A.60% the former granulation for powders of calper calcium peroxide:
1. seediness: adjusting granulating disc disk inclination angle to 58 ~ 62 °, rotating speed is adjusted to 30 r/min, and heating apparatus is adjusted to
40~50℃；Take the 1 former powder of kg calper calcium peroxide, be divided into 9 ~ 11 equal portions, take portion and put to disk, quickly use water smoke to be moistened
Wet and rise granule, granule particle diameter 0.5 mm, take out stand-by, repeat abovementioned steps complete to 9 ~ 11 parts of whole seediness of powder；
2. pelletize: adjusting granulating disc disk inclination angle to 58 ~ 62 °, rotating speed is adjusted to 30 r/min, and heating apparatus is adjusted to
40 ~ 50 DEG C, open dehumidifying blower unit；By step 1. in seediness is complete powder all put into granulating disc, take 4 kg
The former powder of calper calcium peroxide is put in oscillating feeder, at the uniform velocity puts into powder with 100 g/min, adjusts water fog spraying gun powder in disk
Expecting at the highest whereabouts at 28 ~ 32 cm, to falling, backflow material sprays, and water-spraying amount is adjusted to 16 mL/min；Constantly take out
Calper calcium peroxide granule, sieves, and playback, size is at 3 ~ 5 mm, until the whole pelletize of powder is complete；
3. dry: take out the calper calcium peroxide granule having made grain, put to baking oven 104 ~ 106 DEG C of temperature greyish white down to outward appearance；Take out
It is cooled to 50 ~ 60 DEG C, seals, dark stores；
B. calper calcium peroxide particle envelope:
1. the preparation of end spray fluidized-bed coating machine: open end spray fluidized-bed coating machine, the spray fluidized-bed coating machine import of the preheating end is drawn
Air temperature is to 100 DEG C；
2. the preparation of coating liquid: weigh ethyl cellulose 61.90 g, is progressively dissolved in the dehydrated alcohol that consumption is 20 ~ 40%, constantly
Stirring, until thoroughly dissolving, makes coating liquid；
3. peplos: weighing calper calcium peroxide granule 2000.00 g having made grain, and put into end spray fluidized-bed coating machine, adjustment is drawn
Fan delivery is to 2800 m3/ h, fluid bed inlet air inducing temperature 98 ~ 102 DEG C, granule is preheated 8 ~ 12 minutes；Use piston oil
Cylinder extraction step 2. in coating liquid, keep the end spray fluidized-bed coating machine at the bottom of jet flow amount be 10 mL/min, the end spray pneumatics 0.2
MPa, stop-spraying is not spilt, until coating liquid spraying is complete；
4. it is dried: the end spraying fluidized-bed coating machine intake air temperature and is adjusted to 78 ~ 82 DEG C, air-introduced machine air quantity is adjusted to 1680 m3/ h is right
In end spray fluid bed, coated granule is dried 8 ~ 12 min；Close end spray fluidized-bed coating machine warming-up device, keep air inducing
Fan delivery is constant, coated granule in fluid bed is cooled to room temperature, and takes out coated granule, standby.
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| CN115677009A (en) * | 2021-07-30 | 2023-02-03 | 中国石油化工股份有限公司 | Persulfate slow-release material and preparation method thereof |
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