CN109824027A - A kind of circulation technology of phosphate production - Google Patents
A kind of circulation technology of phosphate production Download PDFInfo
- Publication number
- CN109824027A CN109824027A CN201910241758.7A CN201910241758A CN109824027A CN 109824027 A CN109824027 A CN 109824027A CN 201910241758 A CN201910241758 A CN 201910241758A CN 109824027 A CN109824027 A CN 109824027A
- Authority
- CN
- China
- Prior art keywords
- acid
- phosphate
- circulation
- metal
- mother liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of circulation technologies of phosphate production, comprising the following steps: (1) reacts to obtain metal salt with acid by metal, and the metal salt is mixed with phosphorus source solution, sufficiently reaction filtering insoluble matter, oxidant is added, it is fully oxidized, as acid solution；(2) by acid solution and lye hybrid reaction, the phosphate slurry of crystallization is obtained, and the slurry is obtained into phosphate product and mother liquor by being separated by solid-liquid separation；(3) by mother liquor by entering Bipolar Membrane salt water tank after purification, zwitterion concentration substantially reduces to obtain light liquid in the mother liquor after crossing film, can mix circulation pure water next time and be supplemented in acid compartment alkaline chamber.Zwitterion penetrates yin-yang film respectively, and obtains bronsted lowry acids and bases bronsted lowry in acid compartment and alkaline chamber respectively；The acid-base solution is supplemented in step (1) and step (2) as the raw material of subsequent cycle respectively.The present invention realizes that water, saliferous mother liquor recycle and by-product zero-emission.It makes full use of by-product low cost to change to obtain the bronsted lowry acids and bases bronsted lowry as raw material, reduce the kind of raw material and while reducing production cost.
Description
Technical field
The present invention relates to lithium electric material technical fields, are specifically related to a kind of circulation technology of phosphate production
Background technique
The phosphatic general technology of lithium electric material industry production is to add phosphoric acid using sulfate, then add oxidant tune at present
Metal state is saved, then adds alkali (sodium hydroxide or ammonium hydroxide) and calcium phosphate precipitation is come out, then is realized by means such as heating
Crystal transfer obtains high purity battery level phosphate and by-product sulfate and excessive phosphoric acid.
Since sulfate is mostly the raw material of industry in raw material, limited source, and process to obtain by multiple tracks, high expensive.Together
When sulfate contain the crystallization water, feed material low yield more.The mixed solution that obtained by-product mother liquor is sulfate and phosphoric acid is produced,
Separating difficulty is big.It is lower that by-product purity is obtained by evaporative crystallization, expends a large amount of steam, does not have economic benefit.
Summary of the invention
A kind of circulation of phosphate production is provided it is an object of the invention to overcome the shortcomings of the prior art place
Technique realizes recycling for mother liquor and raw material by the technique, reduces raw material while solving environmental issue by zero-emission
Cost.
To achieve the above object, the technical scheme adopted by the invention is as follows: a kind of circulation technology of phosphate production, feature
It is, comprising the following steps:
(1) metal is reacted to obtain the mixture of metal salt with acid, phosphorus source, filters insoluble matter, adds oxidant, sufficiently
Oxidation, as acid solution；
(2) by the acid solution and lye hybrid reaction of step (1), the phosphate slurry of crystallization is obtained, and the slurry is passed through
Separation of solid and liquid obtains phosphate product and mother liquor；
(3) mother liquor is entered into Bipolar Membrane brine reservoir by purification afterwards, the mother liquor after crossing Bipolar Membrane circulation is changed into light
Liquid, the components contained in light liquid prepare without influence phosphate, squeeze into pure water storage tank and use as soda acid room bottom liquid, mother liquor
Middle zwitterion penetrates yin-yang film respectively, and is changed into bronsted lowry acids and bases bronsted lowry in acid compartment and alkaline chamber respectively；The acid-base solution is followed as next
The raw material of ring is supplemented in step (1) and step (2) respectively.
The technique that by-product is changed into raw material using UF membrane by the present invention；So that the bronsted lowry acids and bases bronsted lowry of by-product UF membrane transformation becomes
Raw material reenters production system, and recycling for water is realized in recycling, realizes that low-cost zero-discharge handles by-product, reduces
The kind and cost of raw materials for production, is conducive to the control of product quality.Wherein the alkali in the alkali and raw material of UF membrane output is
Same chemicals, acid and the acid in raw material of UF membrane output are also same chemicals.After steady production, raw material only need metal,
Phosphorus source realizes zero by-product zero-emission, thoroughly solves environmental issue while substantially reducing cost of material.Mother liquor in the step
Purification includes 1000 mesh filter cloth filters pressing of filter press, 50nm ultrafiltration membrane ultrafiltration.
The preferred embodiment of circulation technology as phosphate production of the present invention, the metal is using the useless pair of metallurgy industry
Metal.Metal is that main content is one of transition metal or several；Preferably, the metal be iron, nickel, manganese, cobalt, aluminium,
One or more of vanadium, titanium, niobium.Raw material of the present invention is using the useless secondary metal of metallurgy industry, from a wealth of sources, at low cost, raw material list
Position yield is high, and storage and transport cost is low.It is changed into raw material by by-product, so that raw material totle drilling cost reduces, and reduces to raw material
Quality requirements are realized and produce product using metallurgical by-product, and the internal digestion of the acid that by-product zero-emission regeneration is generated.
The preferred embodiment of circulation technology as phosphate production of the present invention, the acid use sulfuric acid.
The preferred embodiment of circulation technology as phosphate production of the present invention, phosphorus source are phosphoric acid, it is preferable that institute
Stating phosphorus source is industrial phosphoric acid, and the oxidant is compressed air or hydrogen peroxide.
The preferred embodiment of circulation technology as phosphate production of the present invention, the lye are sodium hydroxide or ammonia
Water, it is preferable that the lye is 10wt% sodium hydroxide or 10wt% ammonium hydroxide.Alkali promotes pH for producing phosphate.
The preferred embodiment of circulation technology as phosphate production of the present invention, the step (2) is with pure water or 50%
Hybrid reaction in the liquid of bottom is added as bottom liquid, by acid solution and lye in surfactant solution, and adjusting pH is 0.3~2.5, obtains crystalline substance
The phosphate slurry of change.Surfactant does not occur any reaction in film process and is retained in light liquid in the present invention, therefore
The present invention also solves organic bottom liquid in conventional method simultaneously can not reuse and reluctant problem.
The preferred embodiment of circulation technology as phosphate production of the present invention, the separation of solid and liquid in the step (2)
Using centrifuge separation or filters pressing separate mode.
The preferred embodiment of circulation technology as phosphate production of the present invention, Bipolar Membrane salt storage in the step (3)
Water pot, acid tank therein is separately added into pure water with alkaline chamber or mother liquor crosses the light liquid obtained after film.The amount that water is added in acid compartment is equal to head
When secondary response and the amount of the acid of metal reaction, the amount for the water that alkaline chamber is added are equal to the amount of the aqueous slkali reacted for the first time.
The molar ratio of the preferred embodiment of circulation technology as phosphate production of the present invention, the acid and metal is 1,
The molar ratio of phosphorus atoms and metal is 1~2 in the phosphorus source added for the first time.Circulation starts mole of phosphorus atoms and metal in rear phosphorus source
Than being 1.
The beneficial effects of the present invention are:
1, the present invention so that cost of material reduces, and reduces the quality to raw material by using the useless secondary metal of metallurgy industry
Product is produced using metallurgical by-product it is required that realizing.And the internal digestion of acid that by-product zero-emission regeneration is generated.
2, it using film process, realizes recycling for water, realizes that low-cost zero-discharge handles by-product.
3, the bronsted lowry acids and bases bronsted lowry for making full use of the inexpensive step of by-product to change reduces the kind of raw materials for production as raw material
And cost, be conducive to the control of product quality.
Detailed description of the invention
Fig. 1 is the circulation technology flow chart of phosphate production of the present invention.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
Each raw material involved by following embodiment is commercially available versatile material unless otherwise instructed.
Embodiment 1
As a kind of a kind of embodiment of the circulation technology of phosphate production of the present invention, the circulation of the phosphate production
Technique, comprising the following steps:
(1) the machining waste material pig iron is taken, particle is cut by cutting machine, weighs 10kg (about 175mol) pig iron
Grain, is added in 12kg aqueous solution, instills concentrated sulfuric acid 17.5kg (about 175mol) at a slow speed, adds the industrial phosphoric acid of 85wt%
(about 268.5mol is 1.5), sufficiently to filter insoluble matter after reaction, be transferred to stirred tank, bottom input with iron molar ratio to 30.96kg
Compressed air, it is fully oxidized, as acid solution；
(2) 10wt% lye is configured with liquid alkaline simultaneously, reaction kettle is added in acid solution and lye cocurrent using pure water as bottom liquid
In, pH value is adjusted to 0.3, and reaction obtains the ferric phosphate slurry of crystallization, by the ferric phosphate slurry by obtaining phosphorus after centrifuge separation
Hydrochlorate product and mother liquor, ferric phosphate washing and drying obtain ferric phosphate finished product；
(3) mother liquor obtained enters Bipolar Membrane brine reservoir, wherein pure water 72kg is added in sour tank, and pure water is added in alkaline chamber
70kg；The light liquid that film post mother liquor obtains is crossed, is supplemented in acid compartment alkaline chamber as circulation bottom liquid next time；This time Bipolar Membrane soda acid room obtains
Soda acid be denoted as acid solution 1, lye 1 respectively.
(4) second circulation is to be added to 10kg scrap iron in the acid solution 1 that first circulation obtains, while by 20kg phosphoric acid (phosphorus
Iron molar ratio is 1) to be added, and filters after completely dissolution, is transferred to reaction kettle, bottom input compressed air is fully oxidized, and first is followed
The lye that ring obtains is added, and detects slurry pH value, hands in a small amount of sodium hydroxide solution retroactively and guarantees that pH value is 0.3.It reacts to obtain again
Ferric phosphate.The same second circulation of later step, and continue to do third circulation, behind every time circulation plus phosphorus amount with second circulation one
It causes.
The whole process of the present embodiment only need to add scrap iron and battery-grade iron phosphate can be obtained in phosphoric acid.
Embodiment 2
As a kind of a kind of embodiment of the circulation technology of phosphate production of the present invention, the circulation of the phosphate production
Technique, comprising the following steps:
(1) the machining waste material pig iron is taken, particle is cut by cutting machine, weighs 10kg (175mol) pig iron particle,
It is added in 12kg aqueous solution, instills concentrated sulfuric acid 17.5kg (175mol) at a slow speed, acid is 1), to add with metal molar ratio
The industrial phosphoric acid 40.35kg (phosphorus is 2 with iron molar ratio) of 85wt% filters insoluble matter after sufficiently reacting, and is transferred to stirred tank, is added
Hydrogen peroxide is fully oxidized；
(2) above-mentioned oxidation iron salt solutions and 10% ammonium hydroxide cocurrent are added to reaction kettle, reaction kettle bottom liquid is the surface 5wt%
Activating agent CTAB solution 20kg adjusts pH value to 2.5, and reaction obtains the ferric phosphate slurry of crystallization, which is passed through
Ferric phosphate and mother liquor are obtained after centrifuge separation, ferric phosphate washing and drying obtains ferric phosphate finished product；
(3) mother liquor obtained enters Bipolar Membrane brine reservoir, wherein pure water 72kg is added in sour tank, and pure water is added in alkaline chamber
70kg；It crosses film post mother liquor and is changed into light liquid (containing Surfactant CTAB), which is supplemented in soda acid room, bottom liquid in circulation next time
It recycles so that surfactant is with soda acid reuse；The ammonium hydroxide that the mixture of sulfuric phosphoric acid and alkaline chamber that acid compartment obtains obtain is as second circulation
Raw material, so far, first circulation terminate.
(4) 10kg scrap iron is added in the mixture of sulfuric phosphoric acid that first circulation is prepared by second circulation, while by 20kg phosphorus
Acid (ferrophosphorus molar ratio is 1) is added, and filters after completely dissolution, is transferred to reaction kettle, addition hydrogen peroxide is fully oxidized, as acid solution；
The ammonium hydroxide that first circulation is obtained is as lye.The light liquid of 20kg surfactant obtained using first circulation is added to as bottom liquid
In reaction kettle, acid solution and lye is added in cocurrent, and is detected and adjusted slurry pH value, guarantees that pH value, can not appropriate volume if having 2.5
Outer addition ammonium hydroxide, then react, obtain ferric phosphate.The same second circulation of later step, but the moisturizing of soda acid room preferentially will be in first circulation
The light liquid containing surfactant generated.And continue to do third circulation.
The whole process of the present embodiment only need to add scrap iron and battery-grade iron phosphate can be obtained in phosphoric acid.Surfactant is
Piece as control sheet-form iron phosphate is thick, to reach the additive that control crystal morphology adjusts phosphoric acid ferrum property.Better than phase
For embodiment 1, in the present embodiment, using technology of the invention also solve in conventional production process organic matter CTAB bottom liquid without
Method reuse and reluctant problem.
Embodiment 3
As a kind of a kind of embodiment of the circulation technology of phosphate production of the present invention, the circulation of the phosphate production
Technique, comprising the following steps:
(1) machining waste material manganese iron (Mn-Fe ratio 2:8) is taken, particle is cut by cutting machine, weighs the 10kg pig iron
Grain, is added in 12kg aqueous solution, instills concentrated sulfuric acid 17.5kg (acid is 1 with metal molar ratio) at a slow speed, adds 85wt%'s
Industrial phosphoric acid 20kg (phosphorus is 1 with metal molar ratio), sufficiently filters insoluble matter after reaction, is transferred to stirred tank, bottom input compression
Air, it is fully oxidized to be used as acid solution.
(2) using pure water as bottom liquid in reaction kettle, reaction kettle is added in acid solution and lye (sodium hydroxide) cocurrent；It adjusts
For pH value to 1.0, reaction obtains the phosphoric acid ferrimanganic slurry of crystallization, by the phosphoric acid ferrimanganic slurry by obtaining ferric phosphate after centrifuge separation
Manganese and mother liquor, phosphoric acid ferrimanganic washing and drying obtain phosphoric acid ferrimanganic finished product；
(3) mother liquor obtained enters Bipolar Membrane brine reservoir, and pure water 72kg is added in sour tank, and pure water 70kg is added in alkaline chamber；Through
Crossing Bipolar Membrane circulation, post mother liquor is changed into light liquid, soda acid room respectively obtains sulfuric acid and sodium hydroxide solution.It is used as subsequent cycle
Raw material, so far, first circulation terminates.
(4) second circulation is to be added to 10kg scrap iron in the sulfuric acid of first circulation preparation, while 20kg phosphoric acid is added, and is filled
It is filtered after dividing dissolution, is transferred to reaction kettle, bottom input compressed air is fully oxidized, the sodium hydroxide solution that first circulation is obtained
It is added, and detects slurry pH value, guarantee pH value 1.0, because alkaline chamber is lossy, if having suitably can not additionally add sodium hydroxide completely
Solution minute quantity；It reacts again, obtains phosphoric acid ferrimanganic.The same second circulation of later step, and continue to do third circulation, behind follow every time
Ring adds phosphorus amount consistent with second circulation.
The present embodiment whole process need to only add scrap iron manganese and battery-grade iron phosphate manganese can be obtained in phosphoric acid.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (10)
1. a kind of circulation technology of phosphate production, which comprises the following steps:
(1) metal and acid, phosphorus source solution hybrid reaction are obtained into the mixture of metal salt, sufficiently filters insoluble matter after reaction, then
Oxidant is added, it is fully oxidized, as acid solution；
(2) by the acid solution and lye hybrid reaction of step (1), the phosphate slurry of crystallization is obtained, and the slurry is passed through into solid-liquid
Isolated phosphate product and mother liquor；
(3) mother liquor is crossed film post mother liquor and is changed into light liquid, mended as circulation next time by entering Bipolar Membrane salt water tank after purification
It is charged into acid compartment alkaline chamber, zwitterion penetrates Bipolar Membrane respectively and is changed into bronsted lowry acids and bases bronsted lowry respectively；Acid starting material tank and alkali raw material are squeezed into respectively
Tank and raw material as subsequent cycle supplements step (1) and step (2) respectively.
2. the circulation technology of phosphate production according to claim 1, which is characterized in that the metal uses metallurgy industry
Useless pair metal；Metal is that main content is one of transition metal or several.
3. the circulation technology of phosphate production according to claim 2, which is characterized in that the metal be iron, nickel, manganese,
One or more of cobalt, aluminium, vanadium, titanium, niobium.
4. the circulation technology of phosphate production according to claim 1, which is characterized in that the acid uses sulfuric acid.
5. the circulation technology of phosphate production according to claim 1, which is characterized in that phosphorus source is phosphoric acid；It is preferred that
Ground, phosphorus source are industrial phosphoric acid, and the oxidant is compressed air or hydrogen peroxide.
6. the circulation technology of phosphate production according to claim 1, which is characterized in that the lye be sodium hydroxide or
Ammonium hydroxide, it is preferable that the lye is 10wt% sodium hydroxide or 10wt% ammonium hydroxide.
7. the circulation technology of phosphate production according to claim 1, which is characterized in that the step (2) with pure water or
Hybrid reaction in the liquid of bottom is added as bottom liquid, by acid solution and lye in 5% surfactant solution, and adjusting pH is 0.3~2.5, obtains
To the phosphate slurry of crystallization.
8. the circulation technology of phosphate production according to claim 1, which is characterized in that the solid-liquid in the step (2)
Separation is using centrifuge separation or filters pressing separate mode.
9. the circulation technology of phosphate production according to claim 1, which is characterized in that Bipolar Membrane in the step (3)
Salt water tank, acid compartment therein and alkaline chamber are separately added into pure water or mother liquor crosses the light liquid obtained after film；Preferential consumption mother liquor crosses film
The light liquid generated.
10. the circulation technology of phosphate production according to claim 1, which is characterized in that mole of the acid and metal
Than being 1, the molar ratio of phosphorus atoms and metal is 1~2 in the phosphorus source added for the first time；Circulation starts phosphorus atoms and metal in rear phosphorus source
Molar ratio be 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910241758.7A CN109824027A (en) | 2019-03-27 | 2019-03-27 | A kind of circulation technology of phosphate production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910241758.7A CN109824027A (en) | 2019-03-27 | 2019-03-27 | A kind of circulation technology of phosphate production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109824027A true CN109824027A (en) | 2019-05-31 |
Family
ID=66872664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910241758.7A Pending CN109824027A (en) | 2019-03-27 | 2019-03-27 | A kind of circulation technology of phosphate production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109824027A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307243A (en) * | 2021-07-08 | 2021-08-27 | 河南佰利新能源材料有限公司 | Method for preparing iron phosphate by recycling mother liquor |
| CN115490219A (en) * | 2022-09-02 | 2022-12-20 | 广东邦普循环科技有限公司 | Ferric phosphate and synthesis process, system and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE757550A (en) * | 1969-10-16 | 1971-03-16 | Giulini Gmbh Geb | PROCESS FOR PREPARING PURE PHOSPHATES FROM IMPURE PHOSPHORIC ACIDS |
| CN101708834A (en) * | 2009-12-11 | 2010-05-19 | 广西壮族自治区化工研究院 | Wafer-like ferric phosphate, preparation method and application thereof |
| CN102307806A (en) * | 2009-02-24 | 2012-01-04 | 南方化学股份公司 | Method for purifying lithium-containing wastewater during the continuous production of lithium transition metal phosphates |
| CN103094571A (en) * | 2013-01-31 | 2013-05-08 | 贵州省开阳安达磷化工有限公司 | Method for preparing ferric pyrophosphate for lithium battery and ferric pyrophosphate prepared by method |
| CN105923853A (en) * | 2016-06-07 | 2016-09-07 | 厦门亿赛膜技术有限公司 | Process for preparing phosphoric acid and alkali from phosphate wastewater |
| CN108946694A (en) * | 2018-08-14 | 2018-12-07 | 南通百川新材料有限公司 | A kind of hydrothermal synthesis method of battery-grade iron phosphate |
-
2019
- 2019-03-27 CN CN201910241758.7A patent/CN109824027A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE757550A (en) * | 1969-10-16 | 1971-03-16 | Giulini Gmbh Geb | PROCESS FOR PREPARING PURE PHOSPHATES FROM IMPURE PHOSPHORIC ACIDS |
| CN102307806A (en) * | 2009-02-24 | 2012-01-04 | 南方化学股份公司 | Method for purifying lithium-containing wastewater during the continuous production of lithium transition metal phosphates |
| CN101708834A (en) * | 2009-12-11 | 2010-05-19 | 广西壮族自治区化工研究院 | Wafer-like ferric phosphate, preparation method and application thereof |
| CN103094571A (en) * | 2013-01-31 | 2013-05-08 | 贵州省开阳安达磷化工有限公司 | Method for preparing ferric pyrophosphate for lithium battery and ferric pyrophosphate prepared by method |
| CN105923853A (en) * | 2016-06-07 | 2016-09-07 | 厦门亿赛膜技术有限公司 | Process for preparing phosphoric acid and alkali from phosphate wastewater |
| CN108946694A (en) * | 2018-08-14 | 2018-12-07 | 南通百川新材料有限公司 | A kind of hydrothermal synthesis method of battery-grade iron phosphate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307243A (en) * | 2021-07-08 | 2021-08-27 | 河南佰利新能源材料有限公司 | Method for preparing iron phosphate by recycling mother liquor |
| CN115490219A (en) * | 2022-09-02 | 2022-12-20 | 广东邦普循环科技有限公司 | Ferric phosphate and synthesis process, system and application thereof |
| CN115490219B (en) * | 2022-09-02 | 2024-03-12 | 广东邦普循环科技有限公司 | Ferric phosphate and synthesis process, system and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103757425B (en) | A kind of clean process method being produced vanadic acid sodium and chromium acid sodium alkaline liquid by high chrome alum slag | |
| CN103803518A (en) | Method for preparing monopotassium phosphate by using wet-process phosphoric acid | |
| CN113104827B (en) | Method for preparing battery-grade anhydrous iron phosphate from industrial ammonium phosphate clear solution or industrial ammonium phosphate mother solution | |
| CN103030180B (en) | Production method of high-purity manganese sulfate | |
| CN109704408A (en) | A kind of production method of LITHIUM BATTERY high purity manganese sulfate | |
| WO2013023585A1 (en) | Continuous process for large-scale production of calcium sulfate whisker | |
| CN103011297A (en) | Method for production of high purity manganese sulfate by using pyrolusite as raw material | |
| CN102491379A (en) | Method for preparing high-purity magnesium oxide with high boron salt lake brine | |
| CN102285649A (en) | Method for preparing monopotassium phosphate | |
| CN102502721B (en) | Method for preparing lithium carbonate through extracting lithium from lithium ore | |
| CN105036100A (en) | Preparation method of crystal lithium hexafluorophosphate | |
| CN112408352A (en) | Linkage production process of battery-grade iron phosphate and refined phosphoric acid | |
| CN109824027A (en) | A kind of circulation technology of phosphate production | |
| CN103044239B (en) | Production method of sodium citrate | |
| CN100441502C (en) | Method of classification utilizing wet-process phosphoric acid | |
| CN102020316B (en) | Method for preparing chromic anhydride from potassium chromate | |
| CN106629644B (en) | A method of producing industrial level-one and LITHIUM BATTERY monoammonium phosphate with chemical fertilizer grade monoammonium phosphate | |
| CN104495949B (en) | A kind of method utilizing titanium white waste acid to produce red iron oxide and manganous carbonate | |
| CN114477121A (en) | Production of battery-grade iron phosphate from iron-containing waste residues | |
| CN107934999A (en) | A kind of method that battery-level lithium carbonate is recycled in the catalyst waste slag from polyphenylene sulfide | |
| WO2024098620A1 (en) | Method for co-producing lithium carbonate and lithium hydroxide from lithium-containing solution | |
| CN109534398A (en) | A kind of method that microwave precipitation prepares high purity vanadic anhydride | |
| CN102993231A (en) | Separation method of glyphosine in glyphosate mother liquor | |
| CN102649585B (en) | Preparation method of sodium bichromate | |
| CN103011298A (en) | Method for production of high purity manganese sulfate by using metal manganese sheet as raw material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190531 |
|
| RJ01 | Rejection of invention patent application after publication |