CN115215777A - Method for preparing thioacetic acid from phosphorus pentasulfide and acetic acid - Google Patents
Method for preparing thioacetic acid from phosphorus pentasulfide and acetic acid Download PDFInfo
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- CN115215777A CN115215777A CN202210802265.8A CN202210802265A CN115215777A CN 115215777 A CN115215777 A CN 115215777A CN 202210802265 A CN202210802265 A CN 202210802265A CN 115215777 A CN115215777 A CN 115215777A
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims abstract description 135
- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 title claims abstract description 39
- KOUKXHPPRFNWPP-UHFFFAOYSA-N pyrazine-2,5-dicarboxylic acid;hydrate Chemical compound O.OC(=O)C1=CN=C(C(O)=O)C=N1 KOUKXHPPRFNWPP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 81
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000010025 steaming Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 125000000446 sulfanediyl group Chemical group *S* 0.000 claims abstract description 6
- 239000000047 product Substances 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 16
- 238000004806 packaging method and process Methods 0.000 claims description 14
- 238000004821 distillation Methods 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 10
- 239000012043 crude product Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 8
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 7
- 230000035484 reaction time Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 210000003298 dental enamel Anatomy 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 125000000896 monocarboxylic acid group Chemical group 0.000 claims description 5
- 238000010517 secondary reaction Methods 0.000 claims description 5
- 238000007280 thionation reaction Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002920 hazardous waste Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 abstract description 21
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 10
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 abstract description 3
- 230000002588 toxic effect Effects 0.000 abstract description 3
- 238000004073 vulcanization Methods 0.000 abstract description 3
- 238000012993 chemical processing Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 230000001276 controlling effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C327/00—Thiocarboxylic acids
- C07C327/02—Monothiocarboxylic acids
- C07C327/04—Monothiocarboxylic acids having carbon atoms of thiocarboxyl groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C327/06—Monothiocarboxylic acids having carbon atoms of thiocarboxyl groups bound to hydrogen atoms or to acyclic carbon atoms to hydrogen atoms or to carbon atoms of an acyclic saturated carbon skeleton
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for preparing thioacetic acid by phosphorus pentasulfide and acetic acid, which comprises the following steps of S1: firstly, putting raw materials into a reaction kettle for a thio reaction, and controlling corresponding temperature and time to prepare a product; s2, rough steaming operation: the invention discloses a method for preparing a high-purity sodium hydroxide by using a reaction solution, and relates to the technical field of chemical processing. This thioacetic acid, through throwing into acetic acid and phosphorus pentasulfide to carry out the vulcanization reaction in the reation kettle, finally obtain required thioacetic acid under corresponding temperature through rough steaming operation and rectification operation, so that prove through using common basic chemical raw materials such as phosphorus pentasulfide, acetic acid to replace the current extremely toxic material hydrogen sulfide of using national key supervision and control, can effectually overcome the danger that uses hydrogen sulfide, acetic anhydride as production thioacetic acid raw materials and bring, and can improve the safety degree of product preparation, be convenient for in personnel carry out quick processing.
Description
Technical Field
The invention relates to the technical field of chemical processing, in particular to a method for preparing thioacetic acid by phosphorus pentasulfide and acetic acid.
Background
Thioacetic acid, also known as thioacetic acid, is an organic compound, has a chemical formula of C2H4OS, is mainly used as a chemical reagent, an organic synthesis reagent, a lacrimatory agent and the like, and in case of emergency, personnel in a leakage pollution area are quickly evacuated to a safety area, isolated, strictly limited to enter and exit, and a fire source is cut off; advising emergency treatment personnel to wear a self-contained positive pressure respirator and wear a gas suit; the leakage source is cut off as far as possible, and the limited space such as a sewer, a flood discharge ditch and the like is prevented from entering.
The prior thioacetic acid uses hydrogen sulfide and acetic anhydride to react under the condition of a catalyst to generate thioacetic acid, while the process uses hydrogen sulfide gas which is a dangerous chemical and acetic anhydride which is a chemical easy to prepare toxin, which are mainly regulated by the country, wherein the reaction process of the virulent raw material and the difficult acquisition easily causes safety accidents.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for preparing thioacetic acid by phosphorus pentasulfide and acetic acid, which solves the problems that the prior thioacetic acid uses hydrogen sulfide and acetic anhydride to react under the condition of a catalyst to generate thioacetic acid, the process uses hydrogen sulfide gas which is a key national regulatory dangerous chemical and acetic anhydride which is a key national regulatory easily-toxic chemical, and the reaction process has severe toxicity of raw materials and high acquisition difficulty and is easy to cause safety accidents.
In order to achieve the purpose, the invention is realized by the following technical scheme: the preparation method of the thioacetic acid by the phosphorus pentasulfide and the acetic acid comprises the following steps:
s1, reaction operation: firstly, putting raw materials into a reaction kettle for a thio reaction, and controlling corresponding temperature and time to prepare a product;
s2, rough steaming operation: putting the prepared reaction solution into a rough distillation kettle, and starting a vacuum pump to perform negative pressure distillation;
s3, rectification operation: putting the obtained crude product into an enamel reaction kettle, heating and rectifying, and collecting fractions generated in the kettle to obtain a required product;
s4, packaging operation: and (4) filling the finally obtained product into a packaging barrel through a filling system, and storing in a storage warehouse.
Preferably, the thionation reaction in S1 specifically comprises the following steps:
s1-1, primary reaction: adding 200kg of acetic acid into a reaction kettle (wherein 200kg of acetic acid is added in the first batch, 0-100kg of tailing of the previous batch is used in normal production, then corresponding new acetic acid is added, and the total amount of mixed liquor is 200 kg), and carrying out normal pressure reaction;
s1-2, secondary reaction: 100kg of phosphorus pentasulfide (flake) is added, and the materials naturally react and heat up.
Preferably, the chemical equation of the sulfitation reaction in S1 is: 5CH 3 COOH+P 2 S 5 →5CH 3 COSH+P 2 O 5 And the reaction exotherm of the phosphorus pentasulfide and the acetic acid is 62.5KJ/mol.
Preferably, in the S1-2, circulating water is used for controlling the reaction temperature to be 20-80 ℃, and the reaction is carried out for 0.5-4h under the condition of heat preservation; after the heat preservation is finished, cooling to 20-50 ℃, transferring the materials to a 500L rough steaming kettle; the total working hours of each batch of reaction are about 1-4h.
Preferably, the negative pressure generated by the vacuum pump in S2 is-0.08 MPA to-0.098 MPA, the obtained crude product is 150-183kg, and the total reaction time of each batch is about 1.5-3.5h.
Preferably, the fraction with the temperature of 98-118 ℃ in the kettle is collected in S3 to obtain 90-120kg of product, and the residual tailings in the kettle are sleeved in the feeding reaction process, so that the total reaction time of each batch is about 4 hours.
Preferably, 90-135kg of waste residues are left in the S1-S3 kettle, and the generated waste residues are treated by a waste residue treatment device and then delivered to a hazardous waste disposal unit for safe disposal, wherein the waste residues contain phosphorus pentoxide and phosphorus pentasulfide.
Preferably, the S4 is performed by placing the product in a storage room with a constant temperature of 25 degrees.
Advantageous effects
The invention provides a method for preparing thioacetic acid by phosphorus pentasulfide and acetic acid. Compared with the prior art, the method has the following beneficial effects:
according to the method for preparing the thioacetic acid by using the phosphorus pentasulfide and the acetic acid, the acetic acid and the phosphorus pentasulfide are put into a reaction kettle to carry out vulcanization reaction, and the required thioacetic acid is finally obtained at a corresponding temperature through rough steaming operation and rectification operation, so that the method proves that the danger caused by using the hydrogen sulfide and the acetic anhydride as raw materials for producing the thioacetic acid can be effectively overcome by using common basic chemical raw materials such as the phosphorus pentasulfide and the acetic acid to replace the existing highly toxic material hydrogen sulfide which is mainly supervised and controlled by the country, the safety degree of product preparation can be improved, and the rapid processing is convenient for personnel.
Drawings
FIG. 1 is a process flow diagram of a thioacetic acid preparation process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides three technical solutions:
example one
The preparation method of the thioacetic acid by the phosphorus pentasulfide and the acetic acid comprises the following steps:
s1, reaction operation: firstly, putting raw materials into a reaction kettle for a thio reaction, and controlling corresponding temperature and time to prepare a product;
s2, rough steaming operation: putting the prepared reaction solution into a rough distillation kettle, and starting a vacuum pump to perform negative pressure distillation;
s3, rectification operation: putting the obtained crude product into an enamel reaction kettle, heating and rectifying, and collecting fractions generated in the kettle to obtain a required product;
s4, packaging operation: and (4) filling the finally obtained product into a packaging barrel through a filling system, and storing the packaging barrel in a storage warehouse.
Preferably, the thionation reaction in S1 specifically comprises the following steps:
s1-1, primary reaction: adding 200kg of acetic acid into a reaction kettle (wherein 200kg of acetic acid is added in the first batch, 0-100kg of tailing of the previous batch is applied during normal production, then adding corresponding new acetic acid, and the total amount of the mixed solution is 200 kg), and carrying out normal pressure reaction;
s1-2, secondary reaction: 100kg of phosphorus pentasulfide (flake) is added, and the materials naturally react and heat up.
Preferably, the chemical equation of the sulfitation reaction in S1 is: 5CH 3 COOH+P 2 S 5 →5CH 3 COSH+P 2 O 5 And the reaction exotherm of the phosphorus pentasulfide and the acetic acid is 62.5KJ/mol.
Preferably, in the S1-2, circulating water is used for controlling the reaction temperature to be 20-80 ℃, and the reaction is carried out for 0.5-4h under the condition of heat preservation; after the heat preservation is finished, cooling to 20-50 ℃, transferring the materials to a 500L coarse steaming kettle; the total working hours of each batch of reaction are about 1-4h.
Example two
The preparation method of the thioacetic acid by the phosphorus pentasulfide and the acetic acid comprises the following steps:
s1, reaction operation: firstly, raw materials are put into a reaction kettle for a thio reaction, and the preparation of a product is carried out by controlling the corresponding temperature and time;
s2, rough steaming operation: putting the prepared reaction solution into a rough distillation kettle, and starting a vacuum pump to perform negative pressure distillation;
s3, rectification operation: putting the obtained crude product into an enamel reaction kettle, heating and rectifying, and collecting fractions generated in the kettle to obtain a required product;
s4, packaging operation: and (4) filling the finally obtained product into a packaging barrel through a filling system, and storing the packaging barrel in a storage warehouse.
Preferably, the thionation reaction in S1 specifically comprises the following steps:
s1-1, primary reaction: adding 200kg of acetic acid into a reaction kettle, (wherein 200kg of acetic acid is added in the first batch, 0-100kg of tailing of the previous batch is used in normal production, then corresponding new acetic acid is added, and the total amount of the mixed solution is 200 kg), and carrying out normal pressure reaction;
s1-2, secondary reaction: 100kg of phosphorus pentasulfide (flake) is added, and the materials naturally react and heat up.
Preferably, the chemical equation of the sulfitation reaction in S1 is: 5CH 3 COOH+P 2 S 5 →5CH 3 COSH+P 2 O 5 And the reaction exotherm of the phosphorus pentasulfide and the acetic acid is 62.5KJ/mol.
Preferably, in the S1-2, the reaction temperature is controlled at 20-80 ℃ by circulating water, and the reaction is carried out for 0.5-4h under the condition of heat preservation; after the heat preservation is finished, cooling to 20-50 ℃, transferring the materials to a 500L rough steaming kettle; the total working hours of each batch of reaction are about 1-4h.
Preferably, the negative pressure generated by the vacuum pump in S2 is-0.08 MPA to-0.098 MPA, the obtained crude product is 150-183kg, and the total reaction time of each batch is about 1.5-3.5h.
Preferably, the fraction with the temperature of 98-118 ℃ in the kettle is collected in the S3 to obtain 90-120kg of product, and the residual tailings in the kettle are used in the feeding reaction process, so that the total working hour of each batch of reaction is about 4 hours.
Preferably, 90-135kg of waste residues are left in the S1-S3 kettles, and the generated waste residues are treated by a waste residue treatment device and then delivered to a hazardous waste disposal unit for safe disposal, wherein the waste residues contain phosphorus pentoxide and phosphorus pentasulfide.
EXAMPLE III
The preparation method of thioacetic acid by using phosphorus pentasulfide and acetic acid comprises the following steps:
s1, reaction operation: firstly, putting raw materials into a reaction kettle for a thio reaction, and controlling corresponding temperature and time to prepare a product;
s2, rough steaming operation: putting the prepared reaction solution into a rough distillation kettle, and starting a vacuum pump to carry out negative pressure distillation;
s3, rectification operation: putting the obtained crude product into an enamel reaction kettle, heating and rectifying, and collecting fractions generated in the kettle to obtain a required product;
s4, packaging operation: and (4) filling the finally obtained product into a packaging barrel through a filling system, and storing the packaging barrel in a storage warehouse.
Preferably, the thionation reaction in S1 specifically comprises the following steps:
s1-1, primary reaction: adding 200kg of acetic acid into a reaction kettle, (wherein 200kg of acetic acid is added in the first batch, 0-100kg of tailing of the previous batch is used in normal production, then corresponding new acetic acid is added, and the total amount of the mixed solution is 200 kg), and carrying out normal pressure reaction;
s1-2, secondary reaction: 100kg of phosphorus pentasulfide (flake) is added, and the materials naturally react and heat up.
Preferably, the chemical equation of the sulfitation reaction in S1 is: 5CH 3 COOH+P 2 S 5 →5CH 3 COSH+P 2 O 5 And the reaction exotherm of the phosphorus pentasulfide and the acetic acid is 62.5KJ/mol.
Preferably, in the S1-2, the reaction temperature is controlled at 20-80 ℃ by circulating water, and the reaction is carried out for 0.5-4h under the condition of heat preservation; after the heat preservation is finished, cooling to 20-50 ℃, transferring the materials to a 500L coarse steaming kettle; the total working hours of each batch of reaction are about 1-4h.
Preferably, the negative pressure generated by the vacuum pump in S2 is-0.08 MPA to-0.098 MPA, the obtained crude product is 150-183kg, and the total reaction time of each batch is about 1.5-3.5h.
Preferably, the fraction with the temperature of 98-118 ℃ in the kettle is collected in the S3 to obtain 90-120kg of product, and the residual tailings in the kettle are used in the feeding reaction process, so that the total working hour of each batch of reaction is about 4 hours.
Preferably, 90-135kg of waste residues are left in the S1-S3 kettles, and the generated waste residues are treated by a waste residue treatment device and then delivered to a hazardous waste disposal unit for safe disposal, wherein the waste residues contain phosphorus pentoxide and phosphorus pentasulfide.
Preferably, the S4 is performed by placing the product in a storage room with a constant temperature of 25 degrees.
In conclusion, acetic acid and phosphorus pentasulfide are put into a reaction kettle for a vulcanization reaction, and the required thioacetic acid is finally obtained at a corresponding temperature through rough steaming operation and rectification operation, so that the evidence that the danger caused by using hydrogen sulfide and acetic anhydride as raw materials for producing the thioacetic acid can be effectively overcome by using common basic chemical raw materials such as phosphorus pentasulfide and acetic acid to replace the existing highly toxic material hydrogen sulfide which is subjected to key supervision and control in the country, the safety degree of product preparation can be improved, and the rapid processing by personnel is facilitated
And those not described in detail in this specification are well within the skill of those in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for preparing thioacetic acid by phosphorus pentasulfide and acetic acid is characterized by comprising the following steps: the preparation method specifically comprises the following steps:
s1, reaction operation: firstly, putting raw materials into a reaction kettle for a thio reaction, and controlling corresponding temperature and time to prepare a product;
s2, rough steaming operation: putting the prepared reaction solution into a rough distillation kettle, and starting a vacuum pump to perform negative pressure distillation;
s3, rectification operation: putting the obtained crude product into an enamel reaction kettle, heating and rectifying, and collecting fractions generated in the kettle to obtain a required product;
s4, packaging operation: and (4) filling the finally obtained product into a packaging barrel through a filling system, and storing the packaging barrel in a storage warehouse.
2. The method for preparing thioacetic acid from phosphorus pentasulfide and acetic acid according to claim 1, wherein: the thionation reaction in S1 specifically comprises the following steps:
s1-1, primary reaction: adding 200kg of acetic acid into a reaction kettle (wherein 200kg of acetic acid is added in the first batch, 0-100kg of tailing of the previous batch is applied during normal production, then adding corresponding new acetic acid, and the total amount of the mixed solution is 200 kg), and carrying out normal pressure reaction;
s1-2, secondary reaction: 100kg of phosphorus pentasulfide (flake) is added, and the materials naturally react and heat up.
3. The method of claim 1 for the production of thioacetic acid from phosphorus pentasulfide and acetic acid, wherein: the chemical equation of the sulfitation reaction in the S1 is as follows: 5CH 3 COOH+P 2 S 5 →5CH 3 COSH+P 2 O 5 And the reaction exotherm of the phosphorus pentasulfide and the acetic acid is 62.5KJ/mol.
4. The method for preparing thioacetic acid from phosphorus pentasulfide and acetic acid according to claim 2, wherein: in the S1-2, the reaction temperature is controlled to be 20-80 ℃ by using circulating water, and the reaction is carried out for 0.5-4h under the condition of heat preservation; after the heat preservation is finished, cooling to 20-50 ℃, transferring the materials to a 500L coarse steaming kettle; the total working hours of each batch of reaction are about 1-4h.
5. The method of claim 1 for the production of thioacetic acid from phosphorus pentasulfide and acetic acid, wherein: the negative pressure generated by the vacuum pump in the S2 is-0.08 MPA to-0.098 MPA, the obtained crude product is 150-183kg, and the total reaction time of each batch is about 1.5-3.5h.
6. The method of claim 1 for the production of thioacetic acid from phosphorus pentasulfide and acetic acid, wherein: and in the S3, fractions with the temperature of 98-118 ℃ in the kettle are collected to obtain 90-120kg of products, and the residual tailings in the kettle are sleeved in the feeding reaction process, so that the total reaction time of each batch is about 4 hours.
7. The method of claim 1 for the production of thioacetic acid from phosphorus pentasulfide and acetic acid, wherein: 90-135kg of waste residues are left in the S1-S3 kettles, and the generated waste residues are treated by a waste residue treatment device and then delivered to a hazardous waste disposal unit for safe disposal, wherein the waste residues contain phosphorus pentoxide and phosphorus pentasulfide.
8. The method of claim 1 for the production of thioacetic acid from phosphorus pentasulfide and acetic acid, wherein: in said S4 the product is preserved by placing it in a constant temperature 25 ℃ storage.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108818A (en) * | 2007-08-01 | 2008-01-23 | 潍坊海顺化工有限责任公司 | Method of manufacturing thioacetic acid |
| US20080161597A1 (en) * | 2003-03-03 | 2008-07-03 | Christoph Taeschler | Method For the Production of a Thioacetic Acid and Salts Thereof |
| CN108314637A (en) * | 2018-04-17 | 2018-07-24 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | A kind of preparation method and process units of thioacetic acid |
| CN108912023A (en) * | 2018-08-28 | 2018-11-30 | 江福平 | A method of preparing thioacetic acid |
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- 2022-07-07 CN CN202210802265.8A patent/CN115215777A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080161597A1 (en) * | 2003-03-03 | 2008-07-03 | Christoph Taeschler | Method For the Production of a Thioacetic Acid and Salts Thereof |
| CN101108818A (en) * | 2007-08-01 | 2008-01-23 | 潍坊海顺化工有限责任公司 | Method of manufacturing thioacetic acid |
| CN108314637A (en) * | 2018-04-17 | 2018-07-24 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | A kind of preparation method and process units of thioacetic acid |
| CN108912023A (en) * | 2018-08-28 | 2018-11-30 | 江福平 | A method of preparing thioacetic acid |
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Application publication date: 20221021 |
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