CN111408336A - Aluminum oxide dechlorinating agent and preparation method thereof - Google Patents
Aluminum oxide dechlorinating agent and preparation method thereof Download PDFInfo
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- CN111408336A CN111408336A CN202010190928.6A CN202010190928A CN111408336A CN 111408336 A CN111408336 A CN 111408336A CN 202010190928 A CN202010190928 A CN 202010190928A CN 111408336 A CN111408336 A CN 111408336A
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- dechlorinating agent
- alumina
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- 230000000382 dechlorinating effect Effects 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims abstract description 31
- 239000004744 fabric Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 238000004898 kneading Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 52
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 18
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 13
- 238000006298 dechlorination reaction Methods 0.000 claims description 13
- 241000219782 Sesbania Species 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 9
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 14
- 239000000047 product Substances 0.000 description 22
- 239000011148 porous material Substances 0.000 description 21
- 239000003054 catalyst Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 239000004480 active ingredient Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000005470 impregnation Methods 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
Abstract
The invention relates to an aluminum oxide dechlorinating agent and a preparation method thereof, wherein the raw materials are mixed and put into a kneading machine to be molded to obtain a fabric; processing and molding the fabric by using an extrusion ball forming machine; and drying and roasting the processed and molded product to obtain the dechlorinating agent. The dechlorinating agent with high strength, low abrasion and high efficiency is obtained by the preparation method, and the abrasion rate is lower than 0.13%.
Description
Technical Field
The invention belongs to the technical field of gas purificant, and particularly relates to an aluminum oxide dechlorinating agent and a preparation method thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Alumina is commonly used in the catalyst art as a support for supported catalysts due to its porous structure and large specific surface area. The general raw material is usually aluminum hydroxide, pseudo-boehmite, etc. The carrier with certain pore volume, pore diameter and specific surface is prepared by extrusion or disk granulation and other technologies for molding and then roasting under certain conditions. At present, synthetic gas dechlorinating agents used in domestic markets are generally produced by using an impregnation method. The carrier is prepared by taking aluminum hydroxide as a raw material, quickly removing, disc forming and roasting to prepare the carrier, then impregnating strong alkali solution such as sodium hydroxide, potassium and the like on the surface of a carrier pore channel, and finally roasting. The dechlorinating agent produced by the process has low cost, but the carrier is molded by a disc, so the wear rate is high, and the impregnated active ingredients are easy to fall off. Meanwhile, the impregnation process can destroy and block a part of pore channels, and the removal efficiency is reduced.
Disclosure of Invention
In view of the problems in the prior art, the present invention is to provide an aluminum oxide dechlorinating agent and a preparation method thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a preparation method of an aluminum oxide dechlorinating agent comprises the following specific steps:
mixing the raw materials, putting the mixture into a kneading machine, and molding to obtain the fabric;
processing and molding the fabric by using an extrusion ball forming machine;
and drying and roasting the processed and molded product to obtain the dechlorinating agent.
The dechlorination agent prepared by the preparation method has the advantages of higher strength, lower abrasion rate, lower stacking quality, higher pore volume and higher specific surface area. The inventor finds that the raw materials are extruded by an extrusion ball machine, and compared with a strip extrusion machine, a disc extrusion machine and a screw extruder (such as a trilobal extrusion head), the combination of all components of the obtained dechlorination agent is tight, the dispersibility of all components is good, the surface of the obtained spherical dechlorination agent is smooth, the dechlorination agent is less worn in the forming process, and the dechlorination agent has good integrity.
The addition of the alumina sol has obvious effect on improving the strength and abrasion of the catalyst product.
The dechlorination efficiency is improved because the active components are added in the burdening stage, so that the water loss of the pseudo-boehmite and the formation of the oxidative decomposition pore canal of the sesbania powder during roasting are not influenced. After the roasting is finished, the product has a uniform pore structure. And the carrier precursor is prepared firstly, and then the active component is loaded, so that the active component is deposited in the pore channel to block the pore channel, and the utilization rate of the active component is low. Meanwhile, the carrier is damaged in the loading process, so that the strength is reduced, and part of active components are deposited on the surface in the loading process, so that the abrasion of the product is increased. The intuitive reaction is that the specific surface area is lower by adopting the loaded dechlorinating agent.
The double screw extruder, the extrusion strip forming machine and the extrusion ball forming machine have different shapes of formed products, regular and uniform sizes of the formed products of the extrusion ball forming machine, regular appearance and low abrasion rate.
The abrasion rate refers to the mass loss ratio of the prepared dechlorinating agent in relative motion.
According to the preparation method of the dechlorinating agent, all raw materials are fully mixed and dispersed through a kneader, so that the active components are uniformly dispersed in the fabric, then the fabric is extruded to form a product with a certain shape, the active components are activated through roasting, the active components are dispersed in the alumina, excessive pore channels are not occupied, and the specific surface area and the pore volume are high.
The inventor finds that the alumina carrier and the active component are easy to separate in the impregnation process, the active component is easy to fall off from the carrier, and the active component can block active pore channels of the alumina in the impregnation process, so that the adsorption and desorption efficiency is reduced.
The product is regular, uniform in size, neat in appearance and low in abrasion rate.
In some embodiments of the invention, the raw materials include pseudoboehmite, alumina sol, sodium bicarbonate, sesbania powder, binder. In the application, pseudo-boehmite is taken as a main body of dechlorinating agent, aluminum sol is taken as a bonding agent and a strength reinforcing agent, sodium bicarbonate is taken as an active ingredient, and sesbania powder is taken as a pore-forming agent. Therefore, the pseudo-boehmite is used as a carrier, and the functions of the alumina sol, the sodium bicarbonate and the sesbania powder are different from those of the prior art.
The dechlorinating agent prepared by the preparation method.
The invention has the beneficial effects that:
1. the invention adopts extrusion to form a five-tooth ball shape, and the product has high strength and low abrasion under higher pressure.
2. The product of the invention is in a five-tooth ball shape, and compared with the traditional ball catalyst, the product has high bed layer void ratio and reduced catalyst bed lamination.
3. The active ingredients of the product are uniformly dispersed in the fabric, and after the product is formed and roasted, the active ingredients are dispersed in the alumina, so that excessive pore channels are not occupied, and the specific surface area and the pore volume of the product are high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a graph showing the adsorption and desorption curves of the dechlorination agent of example 1 of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
A preparation method of an aluminum oxide dechlorinating agent comprises the following specific steps:
mixing the raw materials, putting the mixture into a kneading machine, and molding to obtain the fabric;
processing and molding the fabric by using an extrusion ball forming machine;
and drying and roasting the processed and molded product to obtain the dechlorinating agent.
In some embodiments of the present invention, the raw materials comprise, by weight, 0.6 to 0.7 part of pseudo-boehmite, 0.05 to 0.15 part of alumina sol, 0.05 to 0.15 part of sodium bicarbonate, 0.04 to 0.06 part of sesbania powder, and 0.05 to 0.15 part of binder.
Preferably, the raw materials comprise, by weight, 0.65 part of pseudo-boehmite, 0.1 part of alumina sol, 0.1 part of sodium bicarbonate, 0.05 part of sesbania powder and 0.1 part of binder.
In some embodiments of the invention, the kneading time is from 0.5 to 1.5 hours.
In some embodiments of the invention, the die of the extrusion spheronizer has a diameter of 3 to 4 mm.
In some embodiments of the invention, the product obtained after extrusion is of the pentadentate ball type. Compared with the common spherical catalyst, the catalyst has high bed voidage and reduced catalyst bed lamination.
In some embodiments of the invention, the extrusion conditions are 10 to 15 MPa.
In some embodiments of the invention, the conditions of drying are: the temperature is 100 ℃ and 250 ℃, and the drying time is 4-6 h.
In some embodiments of the invention, the conditions of calcination are: 350-550 ℃, and the roasting time is 3-5 h.
The dechlorinating agent prepared by the preparation method.
The invention will be further illustrated by the following examples
Example 1
The weight parts of the raw materials added into the kneader are as follows: 0.65 part of pseudo-boehmite, 0.1 part of alumina sol, 0.1 part of sodium bicarbonate, 0.05 part of sesbania powder and 0.1 part of binder.
Starting the kneader to knead for 1h, transferring the kneaded fabric to an automatic extrusion ball forming machine (model is L X-100), adopting a phi 3-4mm mould, carrying out extrusion forming under the condition of 12Mpa to form a five-tooth ball shape, drying the formed dechlorinating agent for 5h under the condition of 150 ℃, transferring to a roasting furnace, and roasting for 4h under the condition of 550 ℃ to obtain the final product.
The obtained dechlorination agent product was subjected to adsorption and desorption experiments, and as shown in FIG. 1, the BET specific surface area of the obtained dechlorination agent was 123.826m2(ii)/g; the single point total pore volume (r: 1467.4a, P/Po: 0.993438) is 0.610566 cc/g; the total cumulative pore volume of BJH adsorption is 0.624946 cc/g; the BJH desorption cumulative total pore volume is 0.651705 cc/g.
The physical property index of the dechlorinating agent obtained in example 1 is shown in Table 1 in comparison with a commercially available product purchased from Nakanglan chemical technology Co., Ltd. The chlorine breakthrough capacity of the dechlorination agent of example 1 was 37%.
TABLE 1 comparison table of physical index of product
Example 2
The weight parts of the raw materials added into the kneader are as follows: 0.6 part of pseudo-boehmite, 0.08 part of aluminum sol, 0.08 part of sodium bicarbonate, 0.04 part of sesbania powder and 0.08 part of binder.
The kneader is started and kneaded for 1 h. And transferring the kneaded fabric to an automatic strip extrusion forming machine, and carrying out extrusion forming on the fabric into a five-tooth ball shape under the condition of 10Mpa by adopting a phi 3-4mm mould. And drying the molded dechlorinating agent for 5 hours at the temperature of 150 ℃, transferring the dechlorinating agent to a roasting furnace, and roasting the dechlorinating agent for 3 hours at the temperature of 450 ℃ to obtain a final product.
Example 3
The weight parts of the raw materials added into the kneader are as follows: 0.68 part of pseudo-boehmite, 0.12 part of alumina sol, 0.12 part of sodium bicarbonate, 0.06 part of sesbania powder and 0.12 part of binder.
The kneader is started and kneaded for 1 h. And transferring the kneaded fabric to an automatic strip extrusion forming machine, and carrying out extrusion forming on the fabric into a five-tooth ball shape under the condition of 15Mpa by adopting a phi 3-4mm mould. And drying the formed dechlorinating agent for 5 hours at the temperature of 250 ℃, transferring the dechlorinating agent to a roasting furnace, and roasting the dechlorinating agent for 5 hours at the temperature of 350 ℃ to obtain a final product.
Comparative example 1
A twin-screw extruder was used for extrusion molding unlike in example 1. The wear rate of the obtained dechlorinating agent product is 0.021%, the strength is 75N/grain and the pore volume is 0.62 ml/g. The penetration capacity of chlorine is 37 percent.
Comparative example 2
A difference from example 1 is an extrusion molding machine. The obtained dechlorinating agent product has the abrasion rate of 0.053 percent, the strength of 63N/grain and the pore volume of 0.48 ml/g. Penetrating 31 percent of the chlorine.
Comparative example 3
The pseudo-boehmite, the alumina sol and the sodium bicarbonate are mixed and stirred and pulped, sesbania powder and a binding agent are added, mixing and rolling are carried out, extrusion is carried out by an extrusion ball machine, and the rest operation steps are the same as those of the embodiment 1. The obtained dechlorinating agent product has the abrasion rate of 0.087 percent, the strength of 57N/grain and the pore volume of 0.48 ml/g. The penetration capacity of chlorine is 27 percent.
As can be seen from comparison among comparative example 1, comparative example 2 and example 1, the extrusion granulator of the present invention has greatly reduced abrasion rate, and is favorable for the integrity of the obtained dechlorinating agent, the pore structure of the dechlorinating agent and the active ingredient falling off.
As is clear from the comparison between comparative example 3 and example 1, the impregnation prior to the extrusion molding resulted in the falling of the active ingredient, which was not favorable for the improvement of the dechlorination efficiency.
Comparative example 4
Compared with the embodiment 1, the aluminum sol is replaced by water, or the adding amount of the aluminum sol is reduced, and experimental determination analysis proves that the dechlorinating agent prepared by combining the aluminum sol and other components has the effects of improving the strength and abrasion of the catalyst. When the amount of the added alumina sol was 0.03 parts, the strength of the resulting dechlorinating agent was 31N/pellet, and the abrasion rate was 0.27%.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of an aluminum oxide dechlorinating agent is characterized by comprising the following steps: the method comprises the following specific steps:
mixing the raw materials, putting the mixture into a kneading machine, and molding to obtain the fabric;
processing and molding the fabric by using an extrusion ball forming machine;
and drying and roasting the processed and molded product to obtain the dechlorinating agent.
2. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the raw materials comprise, by weight, 0.6-0.7 part of pseudo-boehmite, 0.05-0.15 part of alumina sol, 0.05-0.15 part of sodium bicarbonate, 0.04-0.06 part of sesbania powder and 0.05-0.15 part of binder.
3. The method of producing an alumina dechlorinating agent according to claim 2, wherein: the raw materials comprise, by weight, 0.65 part of pseudo-boehmite, 0.1 part of alumina sol, 0.1 part of sodium bicarbonate, 0.05 part of sesbania powder and 0.1 part of binder.
4. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the kneading time is 0.5-1.5 h.
5. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the diameter of the die of the extrusion granulator is 3-4 mm.
6. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the product obtained after extrusion is in a five-tooth ball shape.
7. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the extrusion condition is 10-15 MPa.
8. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the drying conditions were: the temperature is 100 ℃ and 250 ℃, and the drying time is 4-6 h.
9. The method of producing an alumina dechlorinating agent according to claim 1, wherein: the roasting conditions are as follows: 350-550 ℃, and the roasting time is 3-5 h.
10. A dechlorination agent obtained by the method for preparing an alumina dechlorination agent according to any one of claims 1 to 9.
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| CN202010190928.6A CN111408336A (en) | 2020-03-18 | 2020-03-18 | Aluminum oxide dechlorinating agent and preparation method thereof |
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| CN202010190928.6A CN111408336A (en) | 2020-03-18 | 2020-03-18 | Aluminum oxide dechlorinating agent and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079415A (en) * | 1992-06-02 | 1993-12-15 | 中国石油化工总公司石油化工科学研究院 | A kind of chloride absorbent and preparation method thereof |
| JPH10235186A (en) * | 1997-02-24 | 1998-09-08 | Meidensha Corp | Dechlorination agent |
| EP1153645A1 (en) * | 2000-05-08 | 2001-11-14 | MITSUI ENGINEERING & SHIPBUILDING CO., LTD | Sodium-based dechlorinating agent and waste treatment equipment |
| CN103553094A (en) * | 2013-09-27 | 2014-02-05 | 中国海洋石油总公司 | Pelleting forming method for spherical alumina |
| CN205127891U (en) * | 2015-10-29 | 2016-04-06 | 鲁西催化剂有限公司 | Continuous production moulded product's equipment |
| CN107921408A (en) * | 2015-08-05 | 2018-04-17 | 庄信万丰股份有限公司 | Chemical absorbent composition |
-
2020
- 2020-03-18 CN CN202010190928.6A patent/CN111408336A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079415A (en) * | 1992-06-02 | 1993-12-15 | 中国石油化工总公司石油化工科学研究院 | A kind of chloride absorbent and preparation method thereof |
| JPH10235186A (en) * | 1997-02-24 | 1998-09-08 | Meidensha Corp | Dechlorination agent |
| EP1153645A1 (en) * | 2000-05-08 | 2001-11-14 | MITSUI ENGINEERING & SHIPBUILDING CO., LTD | Sodium-based dechlorinating agent and waste treatment equipment |
| CN103553094A (en) * | 2013-09-27 | 2014-02-05 | 中国海洋石油总公司 | Pelleting forming method for spherical alumina |
| CN107921408A (en) * | 2015-08-05 | 2018-04-17 | 庄信万丰股份有限公司 | Chemical absorbent composition |
| CN205127891U (en) * | 2015-10-29 | 2016-04-06 | 鲁西催化剂有限公司 | Continuous production moulded product's equipment |
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Application publication date: 20200714 |