CN112546844A - Dechlorinating agent and preparation method thereof - Google Patents
Dechlorinating agent and preparation method thereof Download PDFInfo
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- CN112546844A CN112546844A CN202011315195.0A CN202011315195A CN112546844A CN 112546844 A CN112546844 A CN 112546844A CN 202011315195 A CN202011315195 A CN 202011315195A CN 112546844 A CN112546844 A CN 112546844A
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- Prior art keywords
- aluminum carbonate
- sodium aluminum
- binder
- basic sodium
- rough blank
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- 230000000382 dechlorinating effect Effects 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 141
- VCNTUJWBXWAWEJ-UHFFFAOYSA-J aluminum;sodium;dicarbonate Chemical compound [Na+].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O VCNTUJWBXWAWEJ-UHFFFAOYSA-J 0.000 claims abstract description 98
- 238000006298 dechlorination reaction Methods 0.000 claims abstract description 69
- 239000002994 raw material Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 50
- 239000011230 binding agent Substances 0.000 claims description 48
- 239000000203 mixture Substances 0.000 claims description 46
- 230000007935 neutral effect Effects 0.000 claims description 46
- 239000000243 solution Substances 0.000 claims description 37
- 229910052782 aluminium Inorganic materials 0.000 claims description 33
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 33
- 241000219782 Sesbania Species 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 24
- 229910052602 gypsum Inorganic materials 0.000 claims description 23
- 239000010440 gypsum Substances 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 23
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 21
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 21
- 239000003292 glue Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 21
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 21
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 238000009495 sugar coating Methods 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 13
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 10
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical group O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 10
- 239000011507 gypsum plaster Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000460 chlorine Substances 0.000 abstract description 24
- 229910052801 chlorine Inorganic materials 0.000 abstract description 24
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 23
- 239000003054 catalyst Substances 0.000 abstract description 16
- 230000000149 penetrating effect Effects 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 14
- 239000012071 phase Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 11
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 11
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910001647 dawsonite Inorganic materials 0.000 description 4
- 238000007580 dry-mixing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 229960000892 attapulgite Drugs 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000007033 dehydrochlorination reaction Methods 0.000 description 2
- PPQREHKVAOVYBT-UHFFFAOYSA-H dialuminum;tricarbonate Chemical compound [Al+3].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O PPQREHKVAOVYBT-UHFFFAOYSA-H 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052625 palygorskite Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 229940118662 aluminum carbonate Drugs 0.000 description 1
- PCRDIRUKXOTDNN-UHFFFAOYSA-K aluminum;sodium;carbonate;hydroxide Chemical compound [OH-].[Na+].[Al+3].[O-]C([O-])=O PCRDIRUKXOTDNN-UHFFFAOYSA-K 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001833 catalytic reforming Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004211 gastric acid Anatomy 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
- B01D53/685—Halogens or halogen compounds by treating the gases with solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0411—Chemical processing only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
- C01B3/56—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
- C10G29/06—Metal salts, or metal salts deposited on a carrier
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
- C10G29/06—Metal salts, or metal salts deposited on a carrier
- C10G29/08—Metal salts, or metal salts deposited on a carrier containing the metal in the lower valency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- 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
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0003—Chemical processing
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/202—Heteroatoms content, i.e. S, N, O, P
Abstract
The invention belongs to the technical field of catalysts, and particularly relates to a dechlorinating agent and a preparation method thereof. The raw material of the dechlorinating agent provided by the invention comprises basic sodium aluminum carbonate. The dechlorination agent provided by the invention has excellent dechlorination precision and penetrating chlorine capacity, does not need a carrier, and can effectively avoid the problems of difficult dispersion of active components, pore canal blockage, difficult molding and the like caused by the existence of the carrier.
Description
Technical Field
The invention belongs to the technical field of catalysts, and particularly relates to a dechlorinating agent and a preparation method thereof.
Background
Chlorine is a poison to catalysts and adsorbents which are common in industry, and causes pollution to the environment. Chlorine is reactive with metal ions due to its high electron affinity and mobility, and often migrates downward with the process fluid, causing permanent poisoning of the catalyst and often being full bed. For the low-temperature catalyst in the synthetic ammonia industry, chlorine is more harmful than sulfur, and a new phase is generated in the catalyst after the chlorine poisoning, so that the structure of the catalyst is damaged, and copper crystal grains in the catalyst grow rapidly and the activity is reduced rapidly, so that the catalyst cannot be regenerated.
In the petrochemical industry, the activity of a reforming catalyst in a catalytic reforming process gradually declines in the use process, and the catalyst needs to be regenerated regularly to recover the activity, while in the regeneration process of the catalyst, a regeneration medium organic chloride is needed to perform oxychlorination on the catalyst, and during or after the oxychlorination process is performed, part of residual organic chloride is converted into hydrogen chloride under the high-temperature condition. The hydrogen chloride can flow into the pipelines and equipment of the subsequent system along with the regenerated gas, so that the pipelines or the equipment are corroded, or the atmosphere is polluted after the hydrogen chloride is discharged. In addition, after the hydrogen chloride is adsorbed by the catalyst in the downstream process, the acidity of the catalyst can be changed, the normal performance of the catalyst is influenced, the process is difficult to normally operate, and great economic loss is brought to enterprises.
Basic sodium aluminum carbonate is also called dawsonite and has a chemical formula of NaAlCO3(OH)2The sodium aluminum carbonate is active in property, can be immediately decomposed when meeting acid or heat sources, is usually used as a medicament or a fire extinguishing material for treating gastric acid, but the application of the sodium aluminum carbonate hydroxide to a dechlorinating agent is not found so far.
The existing dechlorinating agent mostly adopts a calcium-zinc dechlorinating agent and an alumina alkaline dechlorinating agent, but the dechlorinating agent has limited dechlorinating precision and penetrating chlorine capacity, and often needs to load an active component on a carrier, so that the active component is less loaded, the dechlorinating precision and the penetrating chlorine capacity of the dechlorinating agent are low, and the problems of dispersion of the active component, pore channel blockage, difficult molding and the like are caused when the active component is more loaded. Therefore, it is urgently required to develop a dechlorinating agent which has high dechlorinating precision and high penetrating chlorine capacity and does not need a carrier.
Disclosure of Invention
Therefore, the technical problems to be solved by the invention are that the existing dechlorinating agent has limited dechlorinating precision and penetrating chlorine capacity, and a carrier is additionally needed, so that the dechlorinating agent and the preparation method thereof are provided.
Therefore, the invention adopts the technical proposal that,
a dechlorinating agent is prepared from basic sodium aluminum carbonate.
The basic sodium aluminum carbonate reacts with hydrogen chloride as follows:
NaAlCO3(OH)2+HCl→NaCl+Al(OH)3+CO2↑
NaAlCO3(OH)2+4HCl→NaCl+AlCl3+CO2↑+3H2O。
preferably, the material at least comprises the following raw materials: basic sodium aluminum carbonate and a binder,
the mass ratio of the basic sodium aluminum carbonate to the binder is 100: (0.01-25).
Preferably, the binder is one or more of sesbania gum, sodium carboxymethyl cellulose, neutral alumina sol and gypsum.
Preferably, when the dechlorination agent is dechlorinated under gas phase conditions, the binder is sesbania gum and/or sodium carboxymethyl cellulose;
when the dechlorination agent is dechlorinated under oil phase conditions, the binder is neutral aluminum sol and/or gypsum.
Preferably, the gypsum is plaster of paris, the neutral aluminum sol used in the invention is the conventional neutral aluminum sol and can be obtained commercially, the neutral aluminum sol comprises silicon-containing solid substances such as silicon hydroxide, sodium silicate, silicic acid and the like and water, wherein the solid content in the neutral aluminum sol is 5-25%, and the solid content is solid mass content.
The invention also provides a preparation method of the dechlorination agent, which comprises the following steps:
1) carrying out forming treatment on a mixture of basic sodium aluminum carbonate, a binder and water to obtain a formed rough blank;
2) and drying the formed rough blank to obtain the dechlorinating agent.
Preferably, in the step 1), the mixture of the basic sodium aluminum carbonate, the binder and the water is subjected to extrusion molding or rolling ball molding to obtain a molded rough blank;
the mass ratio of the basic sodium aluminum carbonate to the binder is 100: (0.01-25), wherein the mass ratio of the water to the binder is 100: (0.1-100).
Preferably, the first and second liquid crystal materials are,
when the binder is sesbania gum and/or sodium carboxymethyl cellulose, the preparation method of the dechlorination agent comprises the following steps: adding water into sesbania gum and/or sodium carboxymethylcellulose to prepare a gum-forming aqueous solution, then adding basic sodium aluminum carbonate into the gum-forming aqueous solution, carrying out mixed grinding and extrusion molding to obtain a molded rough blank, and finally drying the molded rough blank to obtain the dechlorinating agent;
when the binder is neutral alumina sol, the preparation method of the dechlorinating agent comprises the following steps: adding basic sodium aluminum carbonate into neutral aluminum sol, mixing and grinding, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank to obtain the dechlorinating agent;
when the binder is gypsum, the dechlorination agent is prepared by the following steps: adding basic sodium aluminum carbonate into gypsum, mixing to obtain a dry mixture, adding water into the dry mixture, mixing to obtain a wet mixture, carrying out adhesive tape forming on the wet mixture to obtain a formed rough blank, and finally drying the formed rough blank to obtain the dechlorinating agent.
Preferably, the first and second liquid crystal materials are,
when the binder is sesbania gum and/or sodium carboxymethylcellulose, the mass concentration of the glue solution is 0.5-2%, and the mass ratio of the basic sodium aluminum carbonate to the glue solution is 100: (15-25), wherein the mixing and grinding time is 15-60 min;
when the binder is neutral aluminum sol, the mass ratio of the basic sodium aluminum carbonate to the neutral aluminum sol is 100: (15-25), wherein the mixing and milling time is 15-60min, and the solid content of the neutral aluminum sol is 5% -25%;
when the binder is gypsum, the mass ratio of the basic sodium aluminum carbonate to the gypsum is 100: (5-20), wherein the mass ratio of the dry mixture to the water is 100: (15-30).
Preferably, the first and second liquid crystal materials are,
when the binder is sesbania gum and/or sodium carboxymethyl cellulose, the preparation method of the dechlorination agent comprises the following steps: adding water into sesbania gum and/or sodium carboxymethylcellulose to prepare a gum water solution, placing part of basic sodium aluminum carbonate into rolling equipment, spraying the gum water solution on the surface of the basic sodium aluminum carbonate in the rolling process of the basic sodium aluminum carbonate until a microspherical mother core is formed, then alternately spraying the rest of basic sodium aluminum carbonate and the gum water solution on the surface of the microspherical mother core until a spherical rough blank is formed, and finally drying the spherical rough blank to obtain the dechlorinating agent;
when the binder is neutral alumina sol, the preparation method of the dechlorinating agent comprises the following steps: putting part of basic sodium aluminum carbonate into rolling equipment, spraying neutral alumina sol on the surface of the basic sodium aluminum carbonate in the rolling process of the basic sodium aluminum carbonate until a microspherical mother nucleus is formed, then alternately spraying the rest of the basic sodium aluminum carbonate and the neutral alumina sol on the surface of the microspherical mother nucleus until a spherical rough blank is formed, and finally drying the spherical rough blank to obtain the dechlorinating agent;
when the binder is gypsum, the dechlorination agent is prepared by the following steps: adding basic sodium aluminum carbonate into gypsum, mixing to obtain a dry mixture, then placing part of the dry mixture into rolling equipment, spraying water on the surface of the dry mixture in the rolling process of the dry mixture until a microspherical mother core is formed, then alternately spraying the rest of the dry mixture and the water on the surface of the microspherical mother core until a spherical rough blank is formed, and finally drying the spherical rough blank to obtain the dechlorinating agent.
Preferably, the first and second liquid crystal materials are,
when the binder is sesbania gum and/or sodium carboxymethylcellulose, the mass concentration of the glue solution is 1% -5%, and the mass ratio of the basic sodium aluminum carbonate to the glue solution in the spherical rough blank is 100: (15-25);
when the binder is neutral alumina sol, the mass ratio of the alkali sodium aluminum carbonate to the neutral alumina sol in the spherical rough blank is 100: (15-25), wherein the solid content of the neutral aluminum sol is 5% -25%;
when the binder is gypsum, the mass ratio of the alkali sodium aluminum carbonate to the gypsum in the dry mixture is 100: (5-20), wherein the mass ratio of the dry mixed material to the water in the spherical rough blank is 100: (15-30).
Preferably, the drying temperature is 80-120 ℃, and the drying time is 1-10 h;
the rolling equipment is a sugar coating machine, and the diameter of the spherical rough blank is 3-5 mm.
The technical scheme of the invention has the following advantages:
1. the invention adopts the basic sodium aluminum carbonate as the active component of the dechlorinating agent for the first time, the basic sodium aluminum carbonate is both the active component and the carrier, and the carrier is not needed, thereby effectively avoiding the problems of difficult dispersion of the active component, pore channel blockage, difficult molding and the like caused by the existence of the carrier.
Meanwhile, the dechlorinating agent provided by the invention has excellent dechlorinating precision and penetrating chlorine capacity, is suitable for the fine dehydrochlorination of gaseous materials such as hydrogen, nitrogen, synthesis gas, gaseous hydrocarbon and the like under the conditions of normal temperature and low temperature, is also suitable for the fine dehydrochlorination of liquid materials such as liquefied gas, reformed oil and the like, and has high dechlorinating precision.
2. The dechlorination agent provided by the invention at least comprises the following raw materials: the aluminum carbonate and the binder are mixed according to a mass ratio of 100: (0.01-25). The basic sodium aluminum carbonate and the binder are mixed, so that the strength of the dechlorinating agent can be greatly enhanced, and the dechlorinating agent is favorable for maintaining excellent dechlorinating performance in a gas phase and an oil phase.
3. The dechlorination agent provided by the invention is further characterized in that the binder is one or more of sesbania gum, sodium carboxymethyl cellulose, neutral alumina sol and gypsum. The basic sodium aluminum carbonate has high activity, and is not easy to adopt acidic and strong basic binders such as acidic aluminum sol, acidic silica sol, water glass, cement and the like, so the dechlorination agent prepared by matching the specific binder and the basic sodium aluminum carbonate can effectively improve the dechlorination performance of the dechlorination agent while taking strength into consideration, and particularly can dechlorinate under the condition of an oil phase, and the dechlorination precision of the dechlorination agent is far higher than that of the conventional calcium-zinc dechlorination agent and alumina alkaline dechlorination agent. Researches show that sesbania gum or sodium carboxymethylcellulose is used as a binder for dechlorination under the gas phase condition, the finished product has high strength and small influence on dechlorination, and neutral aluminum sol and gypsum are used as binders for dechlorination under the oil phase condition, so that strip extrusion or rolling ball forming is facilitated.
4. The invention adopts a specific preparation method aiming at different binders, and is beneficial to taking the strength and dechlorination performance of the dechlorination agent into account.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The neutral aluminum sol used in the following examples of the present invention was purchased from new materials, Inc. of JiuPeng, Zhejiang, and has a model number of CY-L10A, and the solid content of the neutral aluminum sol used was 20%.
Example 1
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and sesbania gum, and a preparation method of the dechlorination agent comprises the following steps:
adding water into sesbania gum to prepare a gum water solution (the mass concentration of the gum water solution is 2%), then adding 100g of basic sodium aluminum carbonate into 25g of the gum water solution, mixing and grinding for 15 minutes, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank at 80 ℃ for 4 hours to obtain the dechlorinating agent.
Example 2
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and sodium carboxymethyl cellulose, and the preparation method of the dechlorination agent comprises the following steps:
adding water into sodium carboxymethylcellulose to prepare a glue forming solution (the mass concentration of the glue solution is 0.5%), then adding 100g of basic sodium aluminum carbonate into 15g of the glue solution, mixing and grinding for 60 minutes, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank at 120 ℃ for 2 hours to obtain the dechlorinating agent.
Example 3
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and neutral aluminum sol, and a preparation method of the dechlorination agent comprises the following steps:
adding 100g of basic sodium aluminum carbonate into 15g of neutral aluminum sol, mixing and grinding for 15 minutes, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank at 80 ℃ for 4 hours to obtain the dechlorinating agent.
Example 4
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and neutral aluminum sol, and a preparation method of the dechlorination agent comprises the following steps:
adding 100g of basic sodium aluminum carbonate into 25g of neutral aluminum sol, mixing and grinding for 60 minutes, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank at 120 ℃ for 2 hours to obtain the dechlorinating agent.
Example 5
The embodiment provides a dechlorinating agent, raw materials of the dechlorinating agent comprise basic sodium aluminum carbonate and plaster of paris, and the preparation method of the dechlorinating agent comprises the following steps:
adding 100g of basic sodium aluminum carbonate into 5g of plaster of paris, carrying out dry mixing for 15 minutes to obtain a dry mixture, then adding 15g of water into the dry mixture, carrying out wet mixing for 20 minutes to obtain a wet mixture, carrying out adhesive tape forming on the wet mixture to obtain a formed rough blank, and finally drying the formed rough blank at 80 ℃ for 4 hours to obtain the dechlorinating agent.
Example 6
The embodiment provides a dechlorinating agent, raw materials of the dechlorinating agent comprise basic sodium aluminum carbonate and plaster of paris, and the preparation method of the dechlorinating agent comprises the following steps:
adding 100g of basic sodium aluminum carbonate into 20g of plaster of paris, carrying out dry mixing for 60 minutes to obtain a dry mixture, then adding 25g of water into the dry mixture, carrying out wet mixing for 60 minutes to obtain a wet mixture, carrying out adhesive tape forming on the wet mixture to obtain a formed rough blank, and finally drying the formed rough blank at 120 ℃ for 2 hours to obtain the dechlorinating agent.
Example 7
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and sesbania gum, and a preparation method of the dechlorination agent comprises the following steps:
adding water into sesbania gum to prepare a glue forming solution (the mass concentration of the glue solution is 1%), placing 50g of basic sodium aluminum carbonate into a sugar coating machine, starting the sugar coating machine, spraying the glue solution on the surface of the basic sodium aluminum carbonate for a few times in the rolling process of the basic sodium aluminum carbonate until a microspherical mother core is formed, then alternately spraying the rest 50g of basic sodium aluminum carbonate and the glue solution on the surface of the microspherical mother core for a few times until a spherical rough blank is formed (the mass ratio of the basic sodium aluminum carbonate to the glue solution in the spherical rough blank is 100: 15, and the diameter of the spherical rough blank is 3-5mm), and finally drying the spherical rough blank at 80 ℃ for 10 hours to obtain the dechlorinating agent.
Example 8
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and sodium carboxymethyl cellulose, and the preparation method of the dechlorination agent comprises the following steps:
adding water into sodium carboxymethylcellulose to prepare a glue solution (the mass concentration of the glue solution is 5%), placing 50g of basic sodium aluminum carbonate into a sugar coating machine, starting the sugar coating machine, spraying the glue solution on the surface of the basic sodium aluminum carbonate for a few times in the rolling process of the basic sodium aluminum carbonate until a microspherical mother core is formed, then alternately spraying the rest 50g of basic sodium aluminum carbonate and the glue solution on the surface of the microspherical mother core for a few times until a spherical rough blank is formed (the mass ratio of the basic sodium aluminum carbonate to the glue solution in the spherical rough blank is 100: 25, and the diameter of the spherical rough blank is 3-5mm), and finally drying the spherical rough blank at 120 ℃ for 6 hours to obtain the dechlorinating agent.
Example 9
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and neutral aluminum sol, and a preparation method of the dechlorination agent comprises the following steps:
putting 50g of basic sodium aluminum carbonate into a sugar coating machine, starting the sugar coating machine, spraying neutral aluminum sol on the surface of the basic sodium aluminum carbonate for a few times in the rolling process of the basic sodium aluminum carbonate until a microspherical mother nucleus is formed, then alternately spraying the rest 50g of basic sodium aluminum carbonate and the neutral aluminum sol on the surface of the microspherical mother nucleus for a few times until a spherical rough blank is formed (the mass ratio of the basic sodium aluminum carbonate to the neutral aluminum sol in the spherical rough blank is 100: 15, and the diameter of the spherical rough blank is 3-5mm), and finally drying the spherical rough blank at 80 ℃ for 6 hours to obtain the dechlorinating agent.
Example 10
The embodiment provides a dechlorination agent, raw materials of the dechlorination agent comprise basic sodium aluminum carbonate and neutral aluminum sol, and a preparation method of the dechlorination agent comprises the following steps:
putting 50g of basic sodium aluminum carbonate into a sugar coating machine, starting the sugar coating machine, spraying neutral aluminum sol on the surface of the basic sodium aluminum carbonate for a few times in the rolling process of the basic sodium aluminum carbonate until a microspherical mother nucleus is formed, then alternately spraying the rest 50g of basic sodium aluminum carbonate and the neutral aluminum sol on the surface of the microspherical mother nucleus for a few times until a spherical rough blank is formed (the mass ratio of the basic sodium aluminum carbonate to the neutral aluminum sol in the spherical rough blank is 100: 25, and the diameter of the spherical rough blank is 3-5mm), and finally drying the spherical rough blank for 1 hour at 120 ℃ to obtain the dechlorinating agent.
Example 11
The embodiment provides a dechlorinating agent, raw materials of the dechlorinating agent comprise basic sodium aluminum carbonate and plaster of paris, and the preparation method of the dechlorinating agent comprises the following steps:
adding 100g of basic sodium aluminum carbonate into 5g of plaster of paris, carrying out dry mixing for 15 minutes to obtain a dry mixture, then placing 50g of the dry mixture into a sugar coating machine, starting the sugar coating machine, spraying water on the surface of the dry mixture for a few times in the rolling process of the dry mixture until a microspherical mother core is formed, then alternately spraying the rest dry mixture and water on the surface of the microspherical mother core for a few times until a globular rough blank is formed (the mass ratio of the dry mixture to the water in the globular rough blank is 100: 15, and the diameter of the globular rough blank is 3-5mm), and finally drying the globular rough blank at 80 ℃ for 5 hours to obtain the dechlorinating agent.
Example 12
The embodiment provides a dechlorinating agent, raw materials of the dechlorinating agent comprise basic sodium aluminum carbonate and plaster of paris, and the preparation method of the dechlorinating agent comprises the following steps:
adding 100g of basic sodium aluminum carbonate into 20g of plaster of paris, carrying out dry mixing for 40 minutes to obtain a dry mixture, then placing 50g of the dry mixture into a sugar coating machine, starting the sugar coating machine, spraying water on the surface of the dry mixture for a few times in the rolling process of the dry mixture until a microspherical mother core is formed, then alternately spraying the rest dry mixture and water on the surface of the microspherical mother core for a few times until a globular rough blank is formed (the mass ratio of the dry mixture to the water in the globular rough blank is 100: 30, and the diameter of the globular rough blank is 3-5mm), and finally drying the globular rough blank at 120 ℃ for 3 hours to obtain the dechlorinating agent.
Comparative example 1
The present comparative example provides a dechlorination agent, which is prepared by a method comprising the steps of:
adding water into sesbania gum to prepare a gum water solution (the mass concentration of the gum water solution is 2%), then adding 48g of aluminum hydroxide and 52g of sodium bicarbonate into 25g of the gum water solution, mixing and grinding for 15 minutes, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank at 80 ℃ for 4 hours to obtain the dechlorinating agent.
Comparative example 2
The comparative example provides a calcium-zinc dechlorinating agent, raw materials of the calcium-zinc dechlorinating agent comprise activated zinc oxide, calcium hydroxide, attapulgite clay and sesbania gum, and a preparation method of the dechlorinating agent comprises the following steps:
adding water into sesbania gum to prepare a gum water solution (the mass concentration of the gum water solution is 2%), adding 35g of active zinc oxide, 65g of calcium hydroxide and 35g of attapulgite clay into 25g of the gum water solution, mixing and grinding for 15 minutes, extruding and forming to obtain a formed rough blank, drying the formed rough blank at 80 ℃ for 4 hours, and roasting at 330 ℃ for 1.5 hours to obtain the calcium-zinc dechlorinating agent.
Comparative example 3
The present comparative example provides an alumina-supported sodium carbonate type dechlorinating agent, raw materials of which include sodium carbonate, alumina and sesbania gum, and a preparation method of the dechlorinating agent includes the steps of: mixing 400g of a sodium carbonate solution with the mass fraction of 25%, 200g of alumina powder and 6g of sesbania gum, milling for 15 minutes, extruding and forming to obtain a formed rough blank, drying the formed rough blank at 80 ℃ for 4 hours, and roasting at 330 ℃ for 3 hours to obtain the alumina-loaded sodium carbonate dechlorinating agent.
Test example 1
The compressive strengths of the dechlorinating agents obtained in the above examples 1 to 12 and comparative examples 1 to 3 were measured by using an ZQJ-II smart particle strength tester (manufactured by Dalian smart tester Co., Ltd.), and the results are shown in Table 1.
TABLE 1 compressive Strength of dechlorinating Agents
Test example 2
The dechlorination agents obtained in the above examples 1 to 12 and comparative examples 1 to 3 were tested for dechlorination accuracy and breakthrough chlorine capacity under gas phase and oil phase conditions, respectively, and the test results are shown in table 2, and the specific methods are as follows:
gas phase conditions:
the dechlorination agents obtained in examples 1-12 and comparative examples 1-3 are crushed into 40-60 meshes, and the volume space velocity of the raw material gas is 3000h under normal pressure, the reaction temperature is 25 ℃, the dechlorination agent loading amount is 4ml and the raw material gas volume space velocity-1Under the condition that raw material gas is nitrogen containing HCL2000ppm, chlorine capacity measurement is respectively carried out on the dechlorinating agent, the content of HCl at the measured outlet is dechlorination precision, and when the content of chlorine at the outlet exceeds 1ppm, the chlorine content is determined by a hydrogen chloride detection tube.
The breakthrough chlorine capacity (mass content of chlorine in the post-breakthrough dechlorinating agent) x the total mass of the post-breakthrough dechlorinating agent/(total mass of the pre-breakthrough dechlorinating agent) × 100%.
Oil phase conditions:
hydrogen chloride was dissolved in the reformate to prepare a simulated feed oil having a hydrogen chloride content of 100 ppm. Grinding the above antichlor to 40-60 mesh particles respectively, at normal pressure, reaction temperature of 25 deg.C, antichlor loading amount of 4ml, liquid phase space velocity of 2h-1Under the condition of (1), the simulated raw oil passes through the reactor filled with the dechlorinating agent to carry out a dynamic dechlorination experiment, the chlorine content in the simulated raw oil at the outlet is measured, namely the dechlorination precision, and when the chlorine content in the simulated raw oil at the outlet is more than 0.1ppm, the simulated raw oil is regarded as penetrating; and analyzing the chlorine content in the oil product at the outlet by using a chlorine content analyzer, and calculating the penetrating chlorine capacity of the dechlorinating agent according to the following formula.
The breakthrough chlorine capacity (mass content of chlorine in the post-breakthrough dechlorinating agent) x the total mass of the post-breakthrough dechlorinating agent/(total mass of the pre-breakthrough dechlorinating agent) × 100%.
TABLE 2 dechlorination accuracy and through-chlorine capacity of dechlorinating agent
As can be seen from Table 2, the dechlorinating agent provided by the invention shows excellent dechlorinating performance in both gas phase and oil phase, and has excellent hydrogen chloride removal precision.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. The dechlorination agent is characterized in that the raw material of the dechlorination agent comprises basic sodium aluminum carbonate.
2. Dechlorination agent according to claim 1, characterized in that it consists of at least the following raw materials: basic sodium aluminum carbonate and a binder,
the mass ratio of the basic sodium aluminum carbonate to the binder is 100: (0.01-25).
3. Dechlorination agent according to claim 1 or 2, characterised in that the binder is one or more of sesbania gum, sodium carboxymethyl cellulose, neutral aluminium sol and gypsum.
4. Dechlorination agent according to any of claims 1 to 3, characterised in that the gypsum is plaster of paris and the neutral aluminium sol has a solids content of between 5% and 25%.
5. A process for the preparation of a dechlorination agent according to any one of claims 1 to 4, comprising the steps of:
1) carrying out forming treatment on a mixture of basic sodium aluminum carbonate, a binder and water to obtain a formed rough blank;
2) and drying the formed rough blank to obtain the dechlorinating agent.
6. The process for producing a dechlorinating agent according to claim 5, wherein in the step 1), a mixture of basic sodium aluminum carbonate, a binder and water is subjected to a strip extrusion process or a ball rolling process to obtain a shaped blank;
the mass ratio of the basic sodium aluminum carbonate to the binder is 100: (0.01-25), wherein the mass ratio of the water to the binder is 100: (0.1-100).
7. The process for producing a dechlorination agent according to claim 5 or 6,
when the binder is sesbania gum and/or sodium carboxymethyl cellulose, the preparation method of the dechlorinating agent comprises the following steps: adding water into sesbania gum and/or sodium carboxymethylcellulose to prepare a gum-forming aqueous solution, then adding basic sodium aluminum carbonate into the gum-forming aqueous solution, carrying out mixed grinding and extrusion molding to obtain a molded rough blank, and finally drying the molded rough blank to obtain the dechlorinating agent;
when the binder is neutral alumina sol, the preparation method of the dechlorinating agent comprises the following steps: adding basic sodium aluminum carbonate into neutral aluminum sol, mixing and grinding, extruding and forming to obtain a formed rough blank, and finally drying the formed rough blank to obtain the dechlorinating agent;
when the binder is gypsum, the dechlorination agent is prepared by the following steps: adding basic sodium aluminum carbonate into gypsum, mixing to obtain a dry mixture, adding water into the dry mixture, mixing to obtain a wet mixture, carrying out adhesive tape forming on the wet mixture to obtain a formed rough blank, and finally drying the formed rough blank to obtain the dechlorinating agent.
8. The process for producing a dechlorination agent according to claim 7,
when the binder is sesbania gum and/or sodium carboxymethylcellulose, the mass concentration of the glue solution is 0.5-2%, and the mass ratio of the basic sodium aluminum carbonate to the glue solution is 100: (15-25), wherein the mixing and grinding time is 15-60 min;
when the binder is neutral aluminum sol, the mass ratio of the basic sodium aluminum carbonate to the neutral aluminum sol is 100: (15-25), wherein the mixing and milling time is 15-60min, and the solid content of the neutral aluminum sol is 5% -25%;
when the binder is gypsum, the mass ratio of the basic sodium aluminum carbonate to the gypsum is 100: (5-20), wherein the mass ratio of the dry mixture to the water is 100: (15-30).
9. The process for producing a dechlorination agent according to claim 5 or 6,
when the binder is sesbania gum and/or sodium carboxymethyl cellulose, the preparation method of the dechlorinating agent comprises the following steps: adding water into sesbania gum and/or sodium carboxymethylcellulose to prepare a gum water solution, placing part of basic sodium aluminum carbonate into rolling equipment, spraying the gum water solution on the surface of the basic sodium aluminum carbonate in the rolling process of the basic sodium aluminum carbonate until a microspherical mother core is formed, then alternately spraying the rest of basic sodium aluminum carbonate and the gum water solution on the surface of the microspherical mother core until a spherical rough blank is formed, and finally drying the spherical rough blank to obtain the dechlorinating agent;
when the binder is neutral alumina sol, the preparation method of the dechlorinating agent comprises the following steps: putting part of basic sodium aluminum carbonate into rolling equipment, spraying neutral alumina sol on the surface of the basic sodium aluminum carbonate in the rolling process of the basic sodium aluminum carbonate until a microspherical mother nucleus is formed, then alternately spraying the rest of the basic sodium aluminum carbonate and the neutral alumina sol on the surface of the microspherical mother nucleus until a spherical rough blank is formed, and finally drying the spherical rough blank to obtain the dechlorinating agent;
when the binder is gypsum, the dechlorination agent is prepared by the following steps: adding basic sodium aluminum carbonate into gypsum, mixing to obtain a dry mixture, then placing part of the dry mixture into rolling equipment, spraying water on the surface of the dry mixture in the rolling process of the dry mixture until a microspherical mother core is formed, then alternately spraying the rest of the dry mixture and the water on the surface of the microspherical mother core until a spherical rough blank is formed, and finally drying the spherical rough blank to obtain the dechlorinating agent.
10. The process for producing a dechlorination agent according to claim 9,
when the binder is sesbania gum and/or sodium carboxymethylcellulose, the mass concentration of the glue solution is 1% -5%, and the mass ratio of the basic sodium aluminum carbonate to the glue solution in the spherical rough blank is 100: (15-25);
when the binder is neutral alumina sol, the mass ratio of the alkali sodium aluminum carbonate to the neutral alumina sol in the spherical rough blank is 100: (15-25), wherein the solid content of the neutral aluminum sol is 5% -25%;
when the binder is gypsum, the mass ratio of the alkali sodium aluminum carbonate to the gypsum in the dry mixture is 100: (5-20), wherein the mass ratio of the dry mixed material to the water in the spherical rough blank is 100: (15-30).
11. The process for preparing a dechlorination agent according to any one of claims 1 to 10, wherein the drying temperature is 80 to 120 ℃ and the drying time is 1 to 10 hours;
the rolling equipment is a sugar coating machine, and the diameter of the spherical rough blank is 3-5 mm.
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