CN105713038A - Chloromethane acid-pickling process used during glyphosate production - Google Patents
Chloromethane acid-pickling process used during glyphosate production Download PDFInfo
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- CN105713038A CN105713038A CN201610168383.2A CN201610168383A CN105713038A CN 105713038 A CN105713038 A CN 105713038A CN 201610168383 A CN201610168383 A CN 201610168383A CN 105713038 A CN105713038 A CN 105713038A
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- washing
- gas
- acid
- chloromethanes
- glyphosate
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- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000005562 Glyphosate Substances 0.000 title claims abstract description 27
- XDDAORKBJWWYJS-UHFFFAOYSA-N glyphosate Chemical compound OC(=O)CNCP(O)(O)=O XDDAORKBJWWYJS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229940097068 glyphosate Drugs 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 25
- 238000005554 pickling Methods 0.000 title abstract description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000005406 washing Methods 0.000 claims abstract description 70
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001179 sorption measurement Methods 0.000 claims abstract description 18
- 239000002808 molecular sieve Substances 0.000 claims abstract description 17
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 13
- 229930040373 Paraformaldehyde Natural products 0.000 claims abstract description 10
- 229920002866 paraformaldehyde Polymers 0.000 claims abstract description 10
- 239000003518 caustics Substances 0.000 claims abstract description 9
- 238000006482 condensation reaction Methods 0.000 claims abstract description 9
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims description 32
- 230000000694 effects Effects 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 12
- CZHYKKAKFWLGJO-UHFFFAOYSA-N dimethyl phosphite Chemical compound COP([O-])OC CZHYKKAKFWLGJO-UHFFFAOYSA-N 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000001117 sulphuric acid Substances 0.000 claims description 8
- 235000011149 sulphuric acid Nutrition 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 6
- KKUKTXOBAWVSHC-UHFFFAOYSA-N Dimethylphosphate Chemical compound COP(O)(=O)OC KKUKTXOBAWVSHC-UHFFFAOYSA-N 0.000 abstract 1
- 235000019441 ethanol Nutrition 0.000 abstract 1
- 229940087646 methanolamine Drugs 0.000 abstract 1
- 239000000463 material Substances 0.000 description 15
- 238000004064 recycling Methods 0.000 description 15
- 230000008901 benefit Effects 0.000 description 12
- 239000002699 waste material Substances 0.000 description 12
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 description 11
- 239000002994 raw material Substances 0.000 description 11
- 230000003247 decreasing effect Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 229940050176 methyl chloride Drugs 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000002363 herbicidal effect Effects 0.000 description 2
- 239000004009 herbicide Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000003541 multi-stage reaction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
- C07F9/3804—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)] not used, see subgroups
- C07F9/3808—Acyclic saturated acids which can have further substituents on alkyl
- C07F9/3813—N-Phosphonomethylglycine; Salts or complexes thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a chloromethane acid-pickling process used during glyphosate production. The chloromethane acid-pickling process comprises the following steps that firstly, paraformaldehyde performs condensation reaction with dimethyl phosphate under the actions of methanol and triethylamine; glyphosate acid is generated under the action of hydrochloric acid, and a large amount of tail gas containing chloromethane is produced; the tail gas is subjected to water washing through a water washing tower, the water-washed tail gas is subjected to ethyl alcohol washing and then is subjected to the adsorption of a caustic soda caustic alkaline-washing tower, and the alkaline-washed gas is subjected to the adsorption of a molecular sieve; the absorbed gas is subjected to secondary water washing, and washing is performed by adopting sulfuric acid. The purity of the chloromethane is improved by adopting the chloromethane acid-pickling process.
Description
Technical field
The present invention relates to fine chemistry industry production field, be specifically related to chloromethanes acid cleaning process in a kind of glyphosate production.
Background technology
Glyphosate is About Monsanto Chemicals in commercial herbicide in 1974, because of it efficiently, low toxicity, low-residual, broad spectrum activity, superior function that being compatible with the environment property is good, glyphosate has become most popular herbicide in the world at present.The glyphosate production of China started to walk the eighties in last century, mostly adopted the alkyl esterification method synthesis technique being primary raw material with glycine, dimethylphosphite, paraformaldehyde.This method process stabilizing, yield are higher, therefore development is very rapid.This method includes synthesis, hydrolysis, crystallization multistep reaction process.Due to the restriction by factors such as equipment materials, mostly adopting batch process, seriously constrain amplification and the optimization of process units, the such as production efficiency that batch (-type) crystallization processes exists is low, labor strength is high, the problem such as investment of production equipment height, the big factor of floor space.
In glyphosate production process, in the tail gas produced, major part is methyl chloride gas, it is directly discharged in air can pollute, and cause the waste of chloromethanes, and consider it is also waste resource from economic factor, therefore company organization related personnel launches R&D work, methanol therein and dimethoxym ethane is recycled, it is often more important that chlorine purification methane as far as possible.
Summary of the invention
For above problems of the prior art, the invention provides chloromethanes acid cleaning process in a kind of glyphosate production, improve the purity of chloromethanes.
The present invention is achieved by the following technical solutions:
Chloromethanes acid cleaning process in a kind of glyphosate production, its preparation technology is as follows:
1) by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 30-35 DEG C；
3) by the gas after the washing in step 2 through alcohol wash, absorb then through caustic wash tower；
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 20 DEG C～45 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 20-25 DEG C.
6) by the gas after secondary washing in step 5, through overpickling tower, the concentrated sulphuric acid washing of 95-98% is adopted.
Further, its preparation technology is as follows:
1) by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 30-35 DEG C；
3) by the gas after the washing in step 2 through alcohol wash, absorb then through caustic wash tower；
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 20 DEG C～45 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 20-25 DEG C.
6) by the gas after secondary washing in step 5, through overpickling tower, the concentrated sulphuric acid washing of 95-98% is adopted.
Further, in step 3, the alcohol of alcohol wash is ethanol.
Further, the alkali of the alkali cleaning in step 3 is Caustic soda, and burning paper mill wastewater is 30-35%.
The invention have the benefit that the present invention adopts above-mentioned production technology, have employed the process of chloromethanes pickling recycling, it is possible to reduce the consumption of methanol in producing, save production cost；Accomplish that cleaning produces, decreased three waste discharge；The water that chloromethanes washing step produces is recycled, containing a small amount of methanol and dimethoxym ethane in washing water；After recycling, and methanol therein and dimethoxym ethane are put forward；Washing step has been readjusted, it is possible to meet the condition of recycling, therefore also improves the efficiency of washing simultaneously；Decrease three waste discharge, reached cleaning and produced, the purpose recycled；Production cost, economic benefit and social benefit are saved very notable；Utilize advanced tower isolation technics, improve the raw-material response rate；Make full use of the characteristic of material, strengthen water absorption；Reduce the discharge of material, reduce raw-material consumption.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
Chloromethanes acid cleaning process in a kind of glyphosate production, its preparation technology is as follows:
1) first by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 30 DEG C；
3) gas after the washing in step 2 is washed through ethanol, absorbs then through Caustic soda caustic wash tower, and burning paper mill wastewater is 30%, removes the acidic materials in gas,
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 22 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 20 DEG C.
6) adopting the concentrated sulphuric acid washing of 95% in step 5, and remove organic impurities and moisture content, prepared methyl chloride gas pressurization condensation liquefaction is collected in storage tank；Low-concentration sulfuric acid concentration Posterior circle after pickling utilizes.
The present invention adopts above-mentioned production technology, have employed the process of chloromethanes pickling recycling, it is possible to reduces the consumption of methanol in producing, saves production cost；Accomplish that cleaning produces, decreased three waste discharge；The water that chloromethanes washing step produces is recycled, containing a small amount of methanol and dimethoxym ethane in washing water；After recycling, and methanol therein and dimethoxym ethane are put forward；Washing step has been readjusted, it is possible to meet the condition of recycling, therefore also improves the efficiency of washing simultaneously；Decrease three waste discharge, reached cleaning and produced, the purpose recycled；Production cost, economic benefit and social benefit are saved very notable；Utilize advanced tower isolation technics, improve the raw-material response rate；Make full use of the characteristic of material, strengthen water absorption；Reduce the discharge of material, reduce raw-material consumption.
Embodiment 2
Chloromethanes acid cleaning process in a kind of glyphosate production, its preparation technology is as follows:
1) first by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 31 DEG C；
3) gas after the washing in step 2 is washed through ethanol, absorbs then through Caustic soda caustic wash tower, and burning paper mill wastewater is 31%, removes the acidic materials in gas,
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 38 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 22 DEG C.
6) adopting the concentrated sulphuric acid washing of 96% in step 5, and remove organic impurities and moisture content, prepared methyl chloride gas pressurization condensation liquefaction is collected in storage tank；Low-concentration sulfuric acid concentration Posterior circle after pickling utilizes.
The present invention adopts above-mentioned production technology, have employed the process of chloromethanes pickling recycling, it is possible to reduces the consumption of methanol in producing, saves production cost；Accomplish that cleaning produces, decreased three waste discharge；The water that chloromethanes washing step produces is recycled, containing a small amount of methanol and dimethoxym ethane in washing water；After recycling, and methanol therein and dimethoxym ethane are put forward；Washing step has been readjusted, it is possible to meet the condition of recycling, therefore also improves the efficiency of washing simultaneously；Decrease three waste discharge, reached cleaning and produced, the purpose recycled；Production cost, economic benefit and social benefit are saved very notable；Utilize advanced tower isolation technics, improve the raw-material response rate；Make full use of the characteristic of material, strengthen water absorption；Reduce the discharge of material, reduce raw-material consumption.
Embodiment 3
Chloromethanes acid cleaning process in a kind of glyphosate production, its preparation technology is as follows:
1) first by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 33 DEG C；
3) gas after the washing in step 2 is washed through ethanol, absorbs then through Caustic soda caustic wash tower, and burning paper mill wastewater is 33%, removes the acidic materials in gas,
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 44 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 24 DEG C.
6) adopting the concentrated sulphuric acid washing of 97% in step 5, and remove organic impurities and moisture content, prepared methyl chloride gas pressurization condensation liquefaction is collected in storage tank；Low-concentration sulfuric acid concentration Posterior circle after pickling utilizes.
The present invention adopts above-mentioned production technology, have employed the process of chloromethanes pickling recycling, it is possible to reduces the consumption of methanol in producing, saves production cost；Accomplish that cleaning produces, decreased three waste discharge；The water that chloromethanes washing step produces is recycled, containing a small amount of methanol and dimethoxym ethane in washing water；After recycling, and methanol therein and dimethoxym ethane are put forward；Washing step has been readjusted, it is possible to meet the condition of recycling, therefore also improves the efficiency of washing simultaneously；Decrease three waste discharge, reached cleaning and produced, the purpose recycled；Production cost, economic benefit and social benefit are saved very notable；Utilize advanced tower isolation technics, improve the raw-material response rate；Make full use of the characteristic of material, strengthen water absorption；Reduce the discharge of material, reduce raw-material consumption.
Embodiment 4
Chloromethanes acid cleaning process in a kind of glyphosate production, its preparation technology is as follows:
1) first by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 35 DEG C；
3) gas after the washing in step 2 is washed through ethanol, absorbs then through Caustic soda caustic wash tower, and burning paper mill wastewater is 35%, removes the acidic materials in gas,
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 45 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 25 DEG C.
6) adopting the concentrated sulphuric acid washing of 98% in step 5, and remove organic impurities and moisture content, prepared methyl chloride gas pressurization condensation liquefaction is collected in storage tank；Low-concentration sulfuric acid concentration Posterior circle after pickling utilizes.
The present invention adopts above-mentioned production technology, have employed the process of chloromethanes pickling recycling, it is possible to reduces the consumption of methanol in producing, saves production cost；Accomplish that cleaning produces, decreased three waste discharge；The water that chloromethanes washing step produces is recycled, containing a small amount of methanol and dimethoxym ethane in washing water；After recycling, and methanol therein and dimethoxym ethane are put forward；Washing step has been readjusted, it is possible to meet the condition of recycling, therefore also improves the efficiency of washing simultaneously；Decrease three waste discharge, reached cleaning and produced, the purpose recycled；Production cost, economic benefit and social benefit are saved very notable；Utilize advanced tower isolation technics, improve the raw-material response rate；Make full use of the characteristic of material, strengthen water absorption；Reduce the discharge of material, reduce raw-material consumption.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (4)
1. chloromethanes acid cleaning process in a glyphosate production, it is characterised in that: its preparation technology is as follows:
1) by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 30-35 DEG C；
3) by the gas after the washing in step 2 through alcohol wash, absorb then through caustic wash tower；
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 20 DEG C～45 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 20-25 DEG C.
6) by the gas after secondary washing in step 5, through overpickling tower, the concentrated sulphuric acid washing of 95-98% is adopted.
2. chloromethanes acid cleaning process in a kind of glyphosate production according to claim 1, it is characterised in that: its preparation technology is as follows:
1) by paraformaldehyde methanol, triethylamine effect under with dimethylphosphite condensation reaction；Under the effect of hydrochloric acid, generate glyphosate, and produce a large amount of tail gas containing chloromethanes；
2) tail gas in step 1 is washed by water scrubber, and the temperature of washing is 30-35 DEG C；
3) by the gas after the washing in step 2 through alcohol wash, absorb then through caustic wash tower；
4) by the gas after alkali cleaning in step 3 through molecular sieve adsorption；Wherein molecular sieve adsorption temperature is 20 DEG C～45 DEG C；
5) gas after absorption in step 4 is carried out secondary washing, and the temperature of washing is 20-25 DEG C.
6) by the gas after secondary washing in step 5, through overpickling tower, the concentrated sulphuric acid washing of 95-98% is adopted.
3. chloromethanes acid cleaning process in a kind of glyphosate production according to claim 2, it is characterised in that: in step 3, the alcohol of alcohol wash is ethanol.
4. chloromethanes acid cleaning process in a kind of glyphosate production according to claim 2, it is characterised in that: the alkali of the alkali cleaning in step 3 is Caustic soda, and burning paper mill wastewater is 30-35%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610168383.2A CN105713038A (en) | 2016-03-19 | 2016-03-19 | Chloromethane acid-pickling process used during glyphosate production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610168383.2A CN105713038A (en) | 2016-03-19 | 2016-03-19 | Chloromethane acid-pickling process used during glyphosate production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113769550A (en) * | 2021-09-17 | 2021-12-10 | 安徽东至广信农化有限公司 | Methyl chloride pickling process for glyphosate production |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629112A (en) * | 2002-07-23 | 2005-06-22 | 浙江新安化工集团股份有限公司 | Clean reclaiming process for byproduct chloromethane of glyphosate acid |
| CN101337861A (en) * | 2007-12-26 | 2009-01-07 | 浙江新安化工集团股份有限公司 | Method for purifying and recovering methyl chloride of glyphosate byproduct |
-
2016
- 2016-03-19 CN CN201610168383.2A patent/CN105713038A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629112A (en) * | 2002-07-23 | 2005-06-22 | 浙江新安化工集团股份有限公司 | Clean reclaiming process for byproduct chloromethane of glyphosate acid |
| CN101337861A (en) * | 2007-12-26 | 2009-01-07 | 浙江新安化工集团股份有限公司 | Method for purifying and recovering methyl chloride of glyphosate byproduct |
Non-Patent Citations (1)
| Title |
|---|
| 吴国权 等: "氯甲烷回收过程水洗塔的动态模拟", 《浙江工业大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113769550A (en) * | 2021-09-17 | 2021-12-10 | 安徽东至广信农化有限公司 | Methyl chloride pickling process for glyphosate production |
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