CN104650139A - Process for treating sulfate-containing glyphosate mother solution based on membrane method - Google Patents
Process for treating sulfate-containing glyphosate mother solution based on membrane method Download PDFInfo
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- CN104650139A CN104650139A CN201310572496.5A CN201310572496A CN104650139A CN 104650139 A CN104650139 A CN 104650139A CN 201310572496 A CN201310572496 A CN 201310572496A CN 104650139 A CN104650139 A CN 104650139A
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- formaldehyde
- sulfate
- mother solution
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Abstract
The invention discloses a process for treating a sulfate-containing glyphosate mother solution based on a membrane method, relates to the process for treating the sulfate-containing glyphosate mother solution based on the membrane method, and particularly relates to the process for concentration of the sulfate-containing glyphosate mother solution for crystallization powder discharge and wastewater comprehensive treatment based on the membrane method. Provided is the glyphosate mother solution treating process improving the powder purity and having less energy consumption and low production cost. The glyphosate mother solution is concentrated through a membrane separation system to obtain a concentrated solution containing a glyphosate crystallization powder and a thin liquid containing sulfate and formaldehyde; the concentrated solution enters a next procedure for powder taking, a filtrate after powder taking is added with water, then enters a filtrate membrane separation system and is concentrated, and the operation can be recurrently carried out in such a way; the permeate liquid (the thin liquid) enters a permeate liquid membrane separation system and is concentrated, and a sulfate thick liquid containing formaldehyde and clear water are obtained; the sulfate thick liquid containing formaldehyde is de-evaporated to obtain sulfate crystals and condensate water containing formaldehyde; a chemical agent is added into the condensate water and undergoes a reaction with formaldehyde to generate by-products, and clean water is obtained after the by-products are removed; and the clean water can be used as addition water for concentration and dialysis of the membrane separation system.
Description
Technical field
The present invention relates to a kind of technique based on embrane method process containing sulfate glyphosate mother solution (glyphosate technicals crystallization be separated after mother liquor), particularly a kind of technique based on the glyphosate mother solution crystallization powder delivery of embrane method (membrane separation technique method) condensed sulfur containing hydrochlorate and waste water comprehensive treating process.
Background technology
The existing treatment process that containing sulfate glyphosate mother solution concentrates is: with the powder delivery of multiple-effect evaporator condensing crystal.
There is following subject matter in this existing concentration technology:
1, mother liquor pH value need be regulated, introduce impurity.2, glyphosate and impurity are concentrated in the lump and crystallize into powder, the purity drop of glyphosate powder.3, use multiple-effect evaporator, energy consumption is large, and efficiency is low.
Summary of the invention
The object of the invention is to for the reduction powder purity existing for existing containing sulfate glyphosate mother solution concentration technology, the problem such as energy consumption is large, production cost is high, provide a kind of and improve powder purity, energy consumption is little, production cost the is low technique based on embrane method process containing sulfate glyphosate mother solution.
The object of the invention is to realize by the following method:
Containing sulfate glyphosate mother solution (abbreviation mother liquor) is entered after pretreatment mother liquor film separating system concentrated (adding water in concentration process dialysis continues concentrated) and reach crystallization powder delivery, the light liquid (abbreviation permeate) of the concentrated solution (abbreviation concentrated solution) being separated containing glyphosate crystal powder and containing sulfate, formaldehyde; Concentrated solution enters next procedure and gets powder, and get the filtrate after powder (be called for short filtrate) and add water and enter filtrate film separating system and concentrate, so circulation is carried out; Permeate enters transparent liquid film separating system and concentrates, must containing the vitriol dope of formaldehyde and clear water; Vitriol dope devaporation containing formaldehyde obtains vitriol and the water of condensation (abbreviation water of condensation) containing formaldehyde; Water of condensation adds chemical agent and formaldehyde reaction generates by product, obtains clear water after removal; Clear water can be used for interpolation water when film separating system concentrates dialysis.
Described mother liquor glyphosate content is 0.5% ~ 6.0%, and pH value is 1 ~ 2; Film separating system working pressure is 10bar ~ 45bar, and operating temperature is 5 DEG C ~ 90 DEG C; Film separating system membrane element used is extraordinary acidproof membrane element, and the type of membrane element is coiled reverse osmosis membrane or rolling nanofiltration membrane; The glyphosate total concn (the glyphosate total content in concentrated solution accounts for the percentage ratio of concentrated solution total amount) more than 12% of concentrated solution, the eduction rate of film separating system condensing crystal powder delivery is the percentage ratio that glyphosate amount of precipitation in 40% ~ 95%(concentrated solution accounts for the glyphosate total amount in mother liquor); Vitriol is ammonium sulfate etc., and the content in mother liquor is 8% ~ 15%, the content 6% ~ 13% in permeate, is being 10% ~ 20% containing the content in the vitriol dope of formaldehyde; The content of formaldehyde in mother liquor is 0.5% ~ 8%, the content 0.5% ~ 7% in transparent liquid, is being 1% ~ 10% containing the content in the vitriol dope of formaldehyde, the content 1% ~ 10% in water of condensation; Chemical agent is ammoniacal liquor, ammonia, urea, lime, sodium bisulfite and multiple strong oxidizer etc.; By product is the product that urotropine, urea-formaldehyde resin etc. have use value.
Compared with existing treatment process, the present invention has following outstanding advantages:
1, do not need to regulate mother liquor pH value, do not introduce impurity composition, do not affect the purity of crystal powder.2, concentrated solution not containing sulfate, through film separating system crystallization powder delivery, glyphosate crystal powder purity is high.3, to concentrate water outlet efficiency high for film separating system, and energy consumption is little, and separable vitriol and other valuable byproducts, realize comprehensive treatment effect, reduce production cost.
Embodiment
Be 1.1 by pH value, glyphosate content be 1.70%, ammonium sulphate content is 11.70%, formaldehyde content be 1.70% glyphosate mother solution 50m
3after filter pre-treatment, drop into storage tank, by high-pressure pump, mother liquor is pumped into mother liquor film separating system from storage tank, working pressure is 20bar ~ 45bar, and operating temperature is 15 DEG C ~ 45 DEG C, adds 50m in process
3water, mother liquor concentrates to obtain the concentrated solution 6.80m containing glyphosate crystal powder through film separating system
3the permeate 93.20m of (concentration 12.23%) and liquid containing ammonium sulfate and formaldehyde
3.Concentrated solution enters whizzer and gets powder and obtain glyphosate dry powder 525.36kg, eduction rate 61.81%; Permeate enters transparent liquid film separating system and concentrates containing ammonium sulfate (concentration 13.48%) the dope 42.36m of 1.77% formaldehyde
3with clear water 50.84m
3; Ammonium sulfate dope devaporation condensing crystal containing formaldehyde obtains ammonium sulfate 5.71t, evaporates to obtain water of condensation 42.10m
3; In water of condensation, add urea in proportion and formaldehyde reaction generates urea-formaldehyde resin, after filtering clear water 41.78m
3.
Claims (8)
1., based on a technique for embrane method process containing sulfate glyphosate mother solution, it is characterized by:
Containing sulfate glyphosate mother solution is entered after pretreatment mother liquor film separating system is concentrated reaches crystallization powder delivery, the light liquid of the concentrated solution being separated containing glyphosate crystal powder and containing sulfate, formaldehyde; Concentrated solution enters next procedure and gets powder, and get filtrate the adding water after powder and enter filtrate film separating system and concentrate, so circulation is carried out; Permeate enters transparent liquid film separating system and concentrates, must containing the vitriol dope of formaldehyde and clear water; Vitriol dope devaporation containing formaldehyde obtains vitriol and the water of condensation containing formaldehyde; Water of condensation adds chemical agent and formaldehyde reaction generates by product, obtains clear water after removal; Clear water can be used for interpolation water when film separating system concentrates dialysis.
2. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, it is characterized in that glyphosate mother solution containing sulfate, sulphate content is 8% ~ 15%, and glyphosate content is 0.5% ~ 6.0%, pH value is 1 ~ 2, and mother liquor is the mother liquor of not adjust pH.
3. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, it is characterized in that mother liquor enters that mother liquor film separating system is concentrated reaches crystallization powder delivery after pretreatment, the glyphosate total concn of concentrated solution is more than 12%, and glyphosate eduction rate is 40% ~ 95%.
4. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, it is characterized in that adding water in mother liquor film separating system concentration process dialysis, added water is clear water or purified water.
5. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, it is characterized in that transparent liquid film separating system concentrates containing the vitriol dope of formaldehyde, devaporation obtains vitriol and the water of condensation containing formaldehyde.
6. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, is characterized in that in water of condensation, add chemical agent and formaldehyde reaction generates by product, and after removing clear water.
7. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, the clear water that it is characterized in that in process can be used for the interpolation water in film separating system.
8. a kind of technique based on embrane method process containing sulfate glyphosate mother solution as claimed in claim 1, it is characterized in that film separating system membrane element used is extraordinary acidproof membrane element, its type is coiled reverse osmosis membrane or rolling nanofiltration membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310572496.5A CN104650139A (en) | 2013-11-18 | 2013-11-18 | Process for treating sulfate-containing glyphosate mother solution based on membrane method |
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| CN201310572496.5A CN104650139A (en) | 2013-11-18 | 2013-11-18 | Process for treating sulfate-containing glyphosate mother solution based on membrane method |
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| CN104650139A true CN104650139A (en) | 2015-05-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963926A (en) * | 2019-11-29 | 2020-04-07 | 杭州天创环境科技股份有限公司 | Method for resource utilization of glyphosate mother liquor with high salt content |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648971A (en) * | 2009-08-20 | 2010-02-17 | 南通江山农药化工股份有限公司 | Method for concentrating and separating glyphosate in glyphosate mother liquor by film process |
| CN101792464A (en) * | 2010-01-12 | 2010-08-04 | 大连屹东膜工程设备有限公司 | Technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by membrane method |
| CN101967161A (en) * | 2010-04-22 | 2011-02-09 | 浙江新安化工集团股份有限公司 | Comprehensive treatment method for glyphosate mother liquid |
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2013
- 2013-11-18 CN CN201310572496.5A patent/CN104650139A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648971A (en) * | 2009-08-20 | 2010-02-17 | 南通江山农药化工股份有限公司 | Method for concentrating and separating glyphosate in glyphosate mother liquor by film process |
| CN101792464A (en) * | 2010-01-12 | 2010-08-04 | 大连屹东膜工程设备有限公司 | Technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by membrane method |
| CN101967161A (en) * | 2010-04-22 | 2011-02-09 | 浙江新安化工集团股份有限公司 | Comprehensive treatment method for glyphosate mother liquid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963926A (en) * | 2019-11-29 | 2020-04-07 | 杭州天创环境科技股份有限公司 | Method for resource utilization of glyphosate mother liquor with high salt content |
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Application publication date: 20150527 |