CN104447860B - The process of producing glyphosate by using glycine coproduction of ammonia sulfate - Google Patents
The process of producing glyphosate by using glycine coproduction of ammonia sulfate Download PDFInfo
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- CN104447860B CN104447860B CN201410706674.3A CN201410706674A CN104447860B CN 104447860 B CN104447860 B CN 104447860B CN 201410706674 A CN201410706674 A CN 201410706674A CN 104447860 B CN104447860 B CN 104447860B
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- ammonium sulfate
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Abstract
The invention provides a kind of process of producing glyphosate by using glycine coproduction of ammonia sulfate. To after glyphosate mother solution CWO, be mixed in reactor through the concentrated ammoniacal liquor obtaining of ammonia and from chloromethanes being purified to the dilute sulfuric acid obtaining after dehydration, pass into fast ammonia gas react, the ammonium sulfate obtaining after filtration, evaporation, crystallization, the dry ammonium sulfate finished product that obtains; Logical ammonia blow-out gas enters biochemistry pool processing after CWO. This process had both been processed the dry dilute sulfuric acid of chloromethanes, made the ammonia after CWO obtain effective utilization, and coproduction obtains producing the required ammonium sulfate of glyphosate formulation again, has alleviated environmental protection pressure, reached diluted acid, ammonia recycling object.
Description
Technical field
The present invention relates to glyphosate production technical field, be specifically related to a kind of process of producing glyphosate by using glycine coproduction of ammonia sulfate.
Background technology
Glyphosate synthesis mainly contains two kinds of glycine method and IDA methods, wherein in process of producing glyphosate by using glycine, produce chloromethanes, it is main forming containing chloromethanes, and the hydrolysis tail gas that contains the organic matters such as a certain amount of methyl alcohol, dimethoxym ethane and hydrogen chloride and water, in order to obtain chloromethanes finished product, must purify chloromethanes, first wash and remove the acidic materials such as organic matter, alkali cleaning removal hydrogen chloride, finally dewater with the concentrated sulfuric acid. After dehydration, obtain dilute sulfuric acid, content is generally between 65% to 75%, color is yellowish-brown, because the impurity that chloromethanes is carried secretly is more, contain more organic matter, for example: formaldehyde, methyl alcohol, dimethoxym ethane etc., though there are the processes such as washing, still have organic matter to bring in sulfuric acid, dilute sulfuric acid plays oxidation in dehydration part, partial organic substances is carbonization even, partial organic substances and sulfuric acid reaction, partial organic substances is dissolved in dilute sulfuric acid, causes dilute sulfuric acid inferior quality, deal with very inconveniently, more there is no suitable comprehensive utilization means. If be directly used in production of compound fertilizer, because condensation puffs away containing formaldehyde, COD is high, cannot carry out biochemical treatment, can bring secondary pollution, is difficult to realize industrial application. And obtain after evaporation and concentration desalination for glyphosate mother solution containing ammonia condensing liquid, prior art does not also make full use of effectively.
Often there is the glyphosate formulation such as gyphosate solution and granule in glyphosate production producer on the other hand, all needs to use ammonium sulfate as synergist, and the dilute sulfuric acid purified treatment therefore workshop being produced is produced ammonium sulfate also again for the production of there being great economic implications.
Summary of the invention
Object of the present invention is just to provide one can overcome above-mentioned defect, by by-product dilute sulfuric acid, ammonia, accomplishes comprehensive resource utilization simultaneously, and solves the method for dilute sulfuric acid blow-out gas secondary pollution.
The process of a kind of producing glyphosate by using glycine coproduction of ammonia sulfate that the present invention proposes, it is characterized in that, by after glyphosate mother solution CWO, be mixed in reactor through the concentrated ammoniacal liquor obtaining of ammonia and from chloromethanes being purified to the dilute sulfuric acid obtaining after dehydration, be diluted with water sulfuric acid concentration to 18%～32%, then ammonia is passed into gas distributor and enter fast reactor with tangential way, controlling reaction temperature is 120～132 DEG C, and pH is 4.3～4.5; The ammonium sulfate that reaction finishes to obtain is removed mechanical admixture through high-temperature resistant filter, then obtains ammonium sulfate wet product through multiple-effect evaporation, finally obtains ammonium sulfate finished product by centrifugal crystallization, pneumatic conveying drying; After logical ammonia blow-out gas condensation, enter in the CWO tower taking titania-based ruthenium rhodium as catalyst and be oxidized, then enter biochemistry pool processing.
For the glyphosate containing in glyphosate mother solution, increase sweet phosphine etc. containing amine organic matter, after catalytic wet catalytic oxidation, organic matter is degraded, amine is oxidized to nitrogen and ammonia, ammonia enters in oxidation solution, and oxidation solution reclaims after phosphor resource, through evaporation and concentration desalination, obtain the condensate liquid containing ammonia, condensate liquid carries out the concentrated ammoniacal liquor that obtains of ammonia. Concentrated ammonia stripping process or the ammonia rectifying column rectification process of comprising of described ammonia, belongs to common process.
Above-mentionedly comprise from chloromethanes being purified to the dilute sulfuric acid that obtains after dehydration the dilute sulfuric acid obtaining after the chloromethanes dehydration producing for glyphosate and raw material dimethylphosphite with the concentrated sulfuric acid.
The preferred multiple-effect evaporation of the present invention is: by the ammonium sulfate process MVR(steam mechanical recompression of removing after impurity) evaporate, steam most of moisture, obtain ammonium sulfate wet product.
Further, the present invention preferably process route comprises: the required heat of liquid ammonia gasification is provided by recirculated water after reacting blow-out gas condensation, and liquefied ammonia is vaporized and reduces circulating water temperature simultaneously, improves circulating water efficiency, saves energy, reduces film-cooled heat.
The present invention is in ammonia and sulfuric acid reaction, and liquefied ammonia, after gasifier gasification, enters gas distributor and enters reactor with tangential way in reactor, the organic matter dissolving can be blown out in diluted acid. In gas ammonia uphill process, drive the mixing of dilute sulfuric acid, accomplish to exempt from mechanical agitation, play energy-conserving action.
The invention solves to chloromethanes purify the dilute sulfuric acid that obtains after dehydration and glyphosate mother solution is obtained after evaporation and concentration desalination process problem containing ammonia condensing liquid, realized the resource comprehensive recycling of by-product dilute sulfuric acid, ammonia in glyphosate production. Blow-out gas in dilute sulfuric acid carries out CWO processing, avoids secondary pollution and pollution transportation. Utilize the integrated treatment of two kinds of glyphosate by-products, and CWO to blow-out gas, be not reported.
The present invention had both processed the dry dilute sulfuric acid of chloromethanes, had utilized the ammonia obtaining after CWO, had alleviated environmental protection pressure, and coproduction obtains producing the required ammonium sulfate of glyphosate formulation again, reached diluted acid, ammonia recycling object. Simultaneously, because COD in the organic matter blowing out is very high, and contain by formaldehyde of sulfuric acid oxidation etc., can not directly enter in biochemistry pool, blow gas, after supercooling, enters CWO operation, carry out CWO to blowing out liquid, by air compressing, at high temperature, ruthenium rhodium catalyst, under effect, the COD substance oxidations such as formaldehyde are become to CO2And H2O, can reach the requirement that enters biochemistry pool processing, and the difficult biochemical substances of blow-out gas is dealt carefully with.
Brief description of the drawings
Fig. 1 is process flow diagram of the present invention.
Wherein: dotted line is energy exchange comprehensive utilization process.
Detailed description of the invention
Embodiment mono-,
The ammoniacal liquor obtaining after dilute sulfuric acid and CWO after dehydration is mixed in reactor, add water sulfuric acid concentration is diluted to 32%, pass into ammonia, reaction temperature rises to 132 DEG C, control pH4.5 reaction and finish, reacting liquor while hot is filtered and is entered MVR evaporator evaporation, centrifugal crystallization, pneumatic conveying drying obtains ammonium sulfate, and in detection ammonium sulfate, nitrogen content 21.0%(is in butt). Meet GB535 " ammonium sulfate " requirement. Logical ammonia puffs away and enters CWO tower (with the multistage catalysis pole plate of the metal coating form) oxidation with titania-based ruthenium rhodium catalyst, passes into air, 150 DEG C of oxidizing temperatures, pressure 4Mpa. COD content 400mg/l after oxidation, enters biochemistry pool processing.
Embodiment bis-,
Dilute sulfuric acid after dehydration is mixed with the weak aqua ammonia obtaining after CWO, dilute sulphuric acid concentration to 28% in reactor, pass into ammonia, reaction temperature rises to 128 DEG C, controls pH4.7 reaction and finishes, and filters while hot, crystallisation by cooling, obtain ammonium sulfate, dry, in ammonium sulfate, nitrogen content 21.0%(is in butt). Meet GB535 " ammonium sulfate " requirement. Add in glyphosate granule and make synergist, meet GB20686 " glyphosate soluble powder (grain) agent " standard-required. Logical ammonia puffs away and enters the oxidation of CWO tower, 180 DEG C of oxidizing temperatures, pressure 6Mpa.. COD content 350mg/l after oxidation, enters biochemistry pool processing.
Embodiment tri-,
Dilute sulfuric acid after dehydration is mixed with the weak aqua ammonia obtaining after CWO, dilute sulphuric acid concentration to 22% in reactor, pass into ammonia, reaction temperature rises to 125 DEG C, controls pH4.3 reaction and finishes, and filters while hot, crystallisation by cooling, obtain ammonium sulfate, dry, in ammonium sulfate, nitrogen content 21.1%(is in butt). Meet GB535 " ammonium sulfate " requirement. Add in gyphosate solution and make synergist, meet GB20684 " gyphosate solution " standard-required. Logical ammonia puffs away and enters the oxidation of CWO tower, 200 DEG C of oxidizing temperatures, pressure 8Mpa.. COD content 320mg/l after oxidation, enters biochemistry pool processing.
Embodiment tetra-,
Dilute sulfuric acid after dehydration is mixed with the weak aqua ammonia obtaining after CWO, dilute sulphuric acid concentration to 18% in reactor, pass into ammonia, reaction temperature rises to 120 DEG C, controls pH4.5 reaction and finishes, and filters while hot, crystallisation by cooling, obtain ammonium sulfate, dry, in ammonium sulfate, nitrogen content 21.0%(is in butt). Meet GB535 " ammonium sulfate " requirement. Logical ammonia puffs away and enters the oxidation of CWO tower, 220 DEG C of oxidizing temperatures, pressure 12Mpa.. COD content 300mg/l after oxidation, enters biochemistry pool processing.
Claims (3)
1. the process of a producing glyphosate by using glycine coproduction of ammonia sulfate, it is characterized in that, by after glyphosate mother solution CWO, be mixed in reactor through the concentrated ammoniacal liquor obtaining of ammonia and from chloromethanes being purified to the dilute sulfuric acid obtaining after dehydration, be diluted with water sulfuric acid concentration to 18%～32%, then ammonia is passed into gas distributor and enter fast reactor with tangential way, controlling reaction temperature is 120～132 DEG C, and pH is 4.3～4.5; The ammonium sulfate that reaction finishes to obtain is removed mechanical admixture through high-temperature resistant filter, then obtains ammonium sulfate wet product through multiple-effect evaporation, finally obtains ammonium sulfate finished product by centrifugal crystallization, pneumatic conveying drying; After logical ammonia blow-out gas condensation, enter in the CWO tower taking titania-based ruthenium rhodium as catalyst and be oxidized, then enter biochemistry pool processing.
2. the process of producing glyphosate by using glycine coproduction of ammonia sulfate as claimed in claim 1, is characterized in that: described multiple-effect evaporation is that the ammonium sulfate of removing after impurity is evaporated through MVR.
3. the process of producing glyphosate by using glycine coproduction of ammonia sulfate as claimed in claim 1 or 2, is characterized in that: the oxidizing temperature being oxidized in CWO tower is 150～220 DEG C, pressure is 4～12MPa.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106316780A (en) * | 2016-08-13 | 2017-01-11 | 安徽东至广信农化有限公司 | Acid pickling and recycling method of methyl chloride in glyphosate production |
| CN106431821B (en) * | 2016-08-25 | 2019-03-05 | 江西金龙化工有限公司 | The method for being dehydrated the comprehensive utilization and by-product sodium bisulfate of dilute sulfuric acid and byproduct sodium chloride |
| CN106395860A (en) * | 2016-08-30 | 2017-02-15 | 爱森（中国）絮凝剂有限公司 | Ammonia gas water washing evaporative crystallization recovery system |
| CN108483462B (en) * | 2018-03-12 | 2020-02-18 | 江西金龙化工有限公司 | Process for recovering ammonium sulfate from glyphosate mother liquor |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328182A (en) * | 2008-07-17 | 2008-12-24 | 湖北励创科技开发有限公司 | Method for producing urotropine and gyphosate solution by using glyphosate waste water |
| CN102728350A (en) * | 2012-07-10 | 2012-10-17 | 北京纬纶华业环保科技股份有限公司 | Catalyst for treating industrial waste water by catalytic wet air oxidation (CWAO) |
| CN103663667A (en) * | 2012-09-19 | 2014-03-26 | 中国中化股份有限公司 | Catalytic wet oxidation pretreatment method of glyphosate production wastewater |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328182A (en) * | 2008-07-17 | 2008-12-24 | 湖北励创科技开发有限公司 | Method for producing urotropine and gyphosate solution by using glyphosate waste water |
| CN102728350A (en) * | 2012-07-10 | 2012-10-17 | 北京纬纶华业环保科技股份有限公司 | Catalyst for treating industrial waste water by catalytic wet air oxidation (CWAO) |
| CN103663667A (en) * | 2012-09-19 | 2014-03-26 | 中国中化股份有限公司 | Catalytic wet oxidation pretreatment method of glyphosate production wastewater |
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