CN103058296A - Treatment method of chloromethane alkali wash and water wash wastewater - Google Patents
Treatment method of chloromethane alkali wash and water wash wastewater Download PDFInfo
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- CN103058296A CN103058296A CN2012105620143A CN201210562014A CN103058296A CN 103058296 A CN103058296 A CN 103058296A CN 2012105620143 A CN2012105620143 A CN 2012105620143A CN 201210562014 A CN201210562014 A CN 201210562014A CN 103058296 A CN103058296 A CN 103058296A
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- methylal
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Abstract
Provided is a treatment method of chloromethane alkali wash and water wash wastewater. The alkali wash and water wash wastewater of chloromethane which is recycled in the process of production of dimethy/glyphosate is driven into a dilute methanol storage tank through a pipeline and enters a methylal rectifying tower and a methanol rectifying tower along with dilute methanol to be recycled, methylal is obtained from the methylal rectifying tower, and methanol is obtained from the methanol rectifying tower. According to the treatment method of the chloromethane alkali wash and water wash wastewater, a recovery rate of the methylal in glyphosate workshop can be improved by 5%, consumption of the methanol is reduced by 5%, chemical oxygen demand of the wastewater which is drained from the bottom of the methanol rectifying tower is below 1500, and processing cost of the wastewater is reduced greatly.
Description
Technical field
The present invention relates to a kind of methyl chloride alkali cleaning, washing waste water treatment process, produce in the methyl chloride tail gas recycle process that handled methyl chloride alkali cleaning, washing waste water produce when being glyphosate and dimethylphosphite production.
Background technology
There are family more than 100 in present domestic glyphosate and dimethylphosphite manufacturing enterprise, aggregated capacity reaches more than 60 ten thousand tons, more than 400,000 ton in annual byproduct chloromethane tail gas, but the waste water of alkali cleaning in the methyl chloride removal process, washing mostly directly enters Sewage treatment systems, because this waste water contains part methyl alcohol, methylal〔Su〕, the COD major part is all about several ten thousand, directly enter dirty place, not only caused the waste of this part, and increased the difficulty of sewage disposal, environmental protection has been brought certain influence.
Summary of the invention
For the deficiencies in the prior art, the purpose of this invention is to provide a kind of methyl chloride alkali cleaning, washing waste water treatment process, methyl alcohol, methylal〔Su〕 that the method can make waste water contain are reclaimed again, have reduced simultaneously dirt and have managed cost everywhere.
The object of the present invention is achieved like this: a kind of methyl chloride alkali cleaning, washing waste water treatment process, the alkali cleaning, the washing waste water that reclaim methyl chloride in dimethyl ester/glyphosate production process are squeezed into the dilute methanol storage tank by pipeline, with dilute methanol together enter the methylal〔Su〕 rectifying tower, methanol rectifying tower reclaims, obtain methylal〔Su〕 from the methylal〔Su〕 rectifying tower, methanol rectifying tower obtains methyl alcohol.
After alkali cleaning, washing waste water entered the dilute methanol storage tank, the content of water was less than 40% in the control dilute methanol storage tank.
By control dilute methanol inlet amount, control methyl alcohol cat head temperature is between 62-64 ℃, and end temperature is between 101-105 ℃.
Methyl chloride alkali cleaning provided by the invention, washing waste water treatment process can make the glyphosate workshop methylal〔Su〕 rate of recovery improve 5%, and methanol consumption reduces by 5%, and the waste water COD of discharging at the bottom of the methanol column is below 1500, and cost of sewage disposal reduces greatly.
Embodiment
Embodiment 1:
.A kind of methyl chloride alkali cleaning, washing waste water treatment process, the alkali cleaning, the washing waste water that reclaim methyl chloride in dimethyl ester/glyphosate production process are squeezed into the dilute methanol storage tank by pipeline, the content of water is less than 40% in the control dilute methanol storage tank, with dilute methanol together enter the methylal〔Su〕 rectifying tower, methanol rectifying tower reclaims, obtain methylal〔Su〕 from the methylal〔Su〕 rectifying tower, methanol rectifying tower obtains methyl alcohol.Methyl alcohol cat head temperature is between 62 ℃, and end temperature is at 101 ℃.
Embodiment 2:
.A kind of methyl chloride alkali cleaning, washing waste water treatment process, the alkali cleaning, the washing waste water that reclaim methyl chloride in dimethyl ester/glyphosate production process are squeezed into the dilute methanol storage tank by pipeline, the content of water is less than 40% in the control dilute methanol storage tank, with dilute methanol together enter the methylal〔Su〕 rectifying tower, methanol rectifying tower reclaims, obtain methylal〔Su〕 from the methylal〔Su〕 rectifying tower, methanol rectifying tower obtains methyl alcohol.Methyl alcohol cat head temperature is between 63 ℃, and end temperature is at 102 ℃.
Embodiment 3:
.A kind of methyl chloride alkali cleaning, washing waste water treatment process, the alkali cleaning, the washing waste water that reclaim methyl chloride in dimethyl ester/glyphosate production process are squeezed into the dilute methanol storage tank by pipeline, the content of water is less than 40% in the control dilute methanol storage tank, with dilute methanol together enter the methylal〔Su〕 rectifying tower, methanol rectifying tower reclaims, obtain methylal〔Su〕 from the methylal〔Su〕 rectifying tower, methanol rectifying tower obtains methyl alcohol.Methyl alcohol cat head temperature is between 63 ℃, and end temperature is at 104 ℃.
Embodiment 4:
.A kind of methyl chloride alkali cleaning, washing waste water treatment process, the alkali cleaning, the washing waste water that reclaim methyl chloride in dimethyl ester/glyphosate production process are squeezed into the dilute methanol storage tank by pipeline, the content of water is less than 40% in the control dilute methanol storage tank, with dilute methanol together enter the methylal〔Su〕 rectifying tower, methanol rectifying tower reclaims, obtain methylal〔Su〕 from the methylal〔Su〕 rectifying tower, methanol rectifying tower obtains methyl alcohol.Methyl alcohol cat head temperature is between 62 ℃, and end temperature is at 105 ℃.
Claims (3)
1. a methyl chloride alkali cleaning, washing waste water treatment process, it is characterized in that: the alkali cleaning, the washing waste water that reclaim methyl chloride in dimethyl ester/glyphosate production process are squeezed into the dilute methanol storage tank by pipeline, with dilute methanol together enter the methylal〔Su〕 rectifying tower, methanol rectifying tower reclaims, obtain methylal〔Su〕 from the methylal〔Su〕 rectifying tower, methanol rectifying tower obtains methyl alcohol.
2. methyl chloride alkali cleaning according to claim 1, washing waste water treatment process is characterized in that: after alkali cleaning, washing waste water enter the dilute methanol storage tank, control the content of water in the dilute methanol storage tank less than 40%.
3. methyl chloride alkali cleaning according to claim 1, washing waste water treatment process is characterized in that: by control dilute methanol inlet amount, control methyl alcohol cat head temperature is between 62-64 ℃, and end temperature is between 101-105 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105620143A CN103058296A (en) | 2012-12-23 | 2012-12-23 | Treatment method of chloromethane alkali wash and water wash wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105620143A CN103058296A (en) | 2012-12-23 | 2012-12-23 | Treatment method of chloromethane alkali wash and water wash wastewater |
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| Publication Number | Publication Date |
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| CN103058296A true CN103058296A (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105620143A Pending CN103058296A (en) | 2012-12-23 | 2012-12-23 | Treatment method of chloromethane alkali wash and water wash wastewater |
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| CN (1) | CN103058296A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288606A (en) * | 2013-06-09 | 2013-09-11 | 湖北泰盛化工有限公司 | Method for recycling methylal in glyphosate wastewater |
| CN103752158A (en) * | 2014-01-27 | 2014-04-30 | 山东潍坊润丰化工股份有限公司 | Method for treating glyphosate hydrolyzing tail gas |
| CN104353339A (en) * | 2014-10-30 | 2015-02-18 | 江西金龙化工有限公司 | Method for continuously recovering by-products from tail gas obtained by hydrolyzing glyphosate |
| CN108689392A (en) * | 2018-07-09 | 2018-10-23 | 江西金龙化工有限公司 | A kind of glyphosate three wastes integrated conduct method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101225030A (en) * | 2007-01-15 | 2008-07-23 | 浙江新安化工集团股份有限公司 | Method for utilizing thermal energy during continuous synthesis of glyphosate |
| CN101786938A (en) * | 2010-03-15 | 2010-07-28 | 衡阳莱德生物药业有限公司 | Method for recycling chloromethane during production of glyphosate by using glycine method |
| CN102101821A (en) * | 2009-12-18 | 2011-06-22 | 浙江新安化工集团股份有限公司 | Recovery method of monochloro methane |
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2012
- 2012-12-23 CN CN2012105620143A patent/CN103058296A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225030A (en) * | 2007-01-15 | 2008-07-23 | 浙江新安化工集团股份有限公司 | Method for utilizing thermal energy during continuous synthesis of glyphosate |
| CN102101821A (en) * | 2009-12-18 | 2011-06-22 | 浙江新安化工集团股份有限公司 | Recovery method of monochloro methane |
| CN101786938A (en) * | 2010-03-15 | 2010-07-28 | 衡阳莱德生物药业有限公司 | Method for recycling chloromethane during production of glyphosate by using glycine method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288606A (en) * | 2013-06-09 | 2013-09-11 | 湖北泰盛化工有限公司 | Method for recycling methylal in glyphosate wastewater |
| CN103288606B (en) * | 2013-06-09 | 2015-08-05 | 湖北泰盛化工有限公司 | A kind of method of the methylal reclaimed in glyphosate waste water |
| CN103752158A (en) * | 2014-01-27 | 2014-04-30 | 山东潍坊润丰化工股份有限公司 | Method for treating glyphosate hydrolyzing tail gas |
| CN103752158B (en) * | 2014-01-27 | 2016-05-04 | 山东潍坊润丰化工股份有限公司 | A kind of processing method of glyphosate hydrolysis tail gas |
| CN104353339A (en) * | 2014-10-30 | 2015-02-18 | 江西金龙化工有限公司 | Method for continuously recovering by-products from tail gas obtained by hydrolyzing glyphosate |
| CN108689392A (en) * | 2018-07-09 | 2018-10-23 | 江西金龙化工有限公司 | A kind of glyphosate three wastes integrated conduct method |
| CN108689392B (en) * | 2018-07-09 | 2019-10-25 | 江西金龙化工有限公司 | A kind of glyphosate three wastes integrated conduct method |
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Application publication date: 20130424 |