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Treatment process of glyphosate mother liquor

A technology of glyphosate mother liquor and treatment process, which is applied in the field of waste water recycling treatment method manufacturing, can solve the problems of large energy consumption, achieve significant economic benefits, realize recycling, and save costs

Active Publication Date: 2009-09-09
HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method recovers formaldehyde, it needs steam heating and consumes a lot of energy.

Method used

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  • Treatment process of glyphosate mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: A kind of treatment process of glyphosate mother liquor, (1) glyphosate mother liquor is in the process of preparing glyphosate by iminodiacetic acid method, after the oxidation of diglyphosate is completed, the original drug of glyphosate is crystallized and separated Finally, get the remaining mother liquor; (2) mother liquor is pretreated with one or two or three or four combinations of filter press, bag filter, precision filter, microporous filter, ultrafiltration, so that The pollution index of the mother liquor is less than or equal to 5; (3) the above mother liquor is separated by a primary membrane --- the primary membrane is one or a combination of reverse osmosis membrane and nanofiltration membrane to obtain a concentration of 2% to 7% (2% or 2.5% or 3% or 3.5% or 4% or 4.5% or 5% or 5.5% or 6% or 6.5% or 7%) concentrate ① and concentration 0% to 0.1% (00.1% or 00.2% or 00.3% or 00.4% or 00.5% or 00.6% or 00.7% or 00.8% or 00.9% or 0.1%) light l...

Embodiment 2

[0010] Embodiment 2: On the basis of embodiment 1, the glyphosate mass fraction of described dope 2. is 5%~15% (5% or 5.5% or 6% or 6.5% or 7% or 7.5% or 8% % or 8.5% or 9% or 9.5% or 10% or 10.5% or 11% or 11.5% or 12% or 12.5% ​​or 13% or 13.5% or 14% or 14.5% or 15%)); or the concentrated The glyphosate mass fraction of liquid ② is 6%~10% (6% or 6.5% or 7% or 7.5% or 8% or 8.5% or 9% or 9.5% or 10%); 5 to 15 times (5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15).

Embodiment 3

[0011] Embodiment 3: On the basis of embodiment 1, described urotropine solution is used for the production of glycine.

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Abstract

The invention relates to a treatment process of glyphosate mother liquor, comprising the following steps: step 1. glyphosate mother liquor is the remaining mother liquor extracted after the glyphosate technical is crystallized and separated out in the process of preparing glyphosate by iminodiacetic acid method; step 2. the mother liquor is pretreated by ultra-filtration to cause the pollution index of the mother liquor to be less than or equal to 5; step 3. strong liquor (1) with concentration of 2%-7% and light liquor (1) with concentration of 0%-0.1% are obtained from the mother liquor by a first order membrane separation and are respectively collected in storage tanks, strong liquor (2) with concentration of 5%-15% and light liquor (2) with concentration of 0.1%-0.2% are obtained fromthe strong liquor (1) by a second order membrane separation and are respectively collected in storage tanks; step 4. the strong liquor (2) is cooled to negative 10 DEG C to 25 DEG C for crystallizingand separating to obtain glyphosate bulk drug and filtrate, the filtrate is used indiscriminately for 1-20 times, the light liquor (2) returns to the first order membrane for separation; step 5. the light liquor (1) in step 3 is fed with ammonia until pH is equal to 8-11 and generates urotropine, urotropine solution with the mass percentage of 5%-40% and light liquor (2) with the pH of 7-11 are obtained after a third order and a fourth order membrane separation; and step 6. after the filtrate in the step (4) is used indiscriminately for 1-20 times, the remaining filtrate is added with water according to the proportion of 1:0.5-5 to remove formaldehyde, glyphosate filtrate with the content of formaldehyde less than or equal to 0.30% is obtained and is used for preparing gyphosate solution.

Description

technical field [0001] The invention relates to a process for treating mother liquor after crystallization, precipitation and separation of glyphosate raw material, and belongs to the field of waste water recycling treatment method manufacturing. Background technique [0002] The patent application number is 200610050151, which discloses a process for concentrating pesticide mother liquor by membrane method. In between, after the pretreatment system meets the water inlet requirements of the ultrafiltration equipment, it enters the first-level ultrafiltration membrane treatment system; 2. The low-concentration glyphosate mother liquor is separated into two strands after being separated by the ultrafiltration membrane, and the concentrated side solution returns to The raw material liquid tank, the light side enters the secondary nanofiltration membrane system; 3. The glyphosate mother liquor solution entering the secondary nanofiltration membrane system is divided into two str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/38C07D487/18C07C229/16A01N57/20A01N25/02B01D61/02B01D61/14
Inventor 丁国良赵经纬刘和德陈建姜新建
Owner HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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