Comprehensive treatment method for glyphosate mother liquid

A technology of glyphosate mother liquor and treatment method, which is applied in the field of comprehensive treatment of waste mother liquor, can solve the problems of not mentioning the treatment method and fundamentally solving the problem of the outlet of glyphosate mother liquor, achieving good economic benefits and reducing environmental protection The effect of pressure and mild process conditions

Active Publication Date: 2011-02-09
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as Chinese patents CN101525351, CN101591084, CN101648755, CN101348299, etc. have all described the technology of concentrating glyphosate mother liquor by membrane method and then taking powder. The treated light liquid is treated, and there is no mention of the treatment method for the mother liquid after concentrated powder extraction that still contains glyphosate, and the problem of the outlet for the glyphosate mother liquid is not fundamentally solved

Method used

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  • Comprehensive treatment method for glyphosate mother liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] After the 300Kg glyphosate mother liquor (glyphosate=1.0wt%, formaldehyde=3.7wt%) is pretreated and filtered, enter the three-stage membrane concentration system for concentration: after the glyphosate dilute mother liquor passes through the first-stage membrane, it is divided into Concentrated liquid and light liquid are divided into two parts, among which concentrated liquid 1 (glyphosate=4.7wt%, formaldehyde=2.0wt%); concentrated liquid 1 continues to enter the secondary membrane to concentrate, and dilute liquid 1 is collected; concentrated liquid 1 passes through the secondary After the membrane is concentrated, it is divided into two parts, the strong liquid 2 and the weak liquid 2. In the strong liquid 2 (glyphosate=6.2wt%, formaldehyde=3.2wt%), the light liquid 2 is collected; the strong liquid 2 continues to enter the three-stage membrane concentration; It is further divided into two parts, the strong liquid 3 and the weak liquid 3, wherein in the strong liquid ...

Embodiment 2

[0037] After the 100Kg glyphosate mother liquor (glyphosate=1.0wt%, formaldehyde=3.7wt%) is pretreated and filtered, enter the three-stage membrane concentration system for concentration: after the glyphosate dilute mother liquor passes through the first-stage membrane, it is divided into Concentrated liquid and light liquid are divided into two parts, among which concentrated liquid 1 (glyphosate=4.3wt%, formaldehyde=2.2wt%); concentrated liquid 1 continues to enter the secondary membrane to concentrate, and dilute liquid 1 is collected; concentrated liquid 1 passes through the secondary After the membrane is concentrated, it is divided into two parts, the strong liquid 2 and the weak liquid 2. In the strong liquid 2 (glyphosate=6.6wt%, formaldehyde=3.4wt%), the light liquid 2 is collected; the strong liquid 2 continues to enter the three-stage membrane concentration; It is further divided into two parts, the thick liquid 3 and the thin liquid 3. In the thick liquid 3 (glyphos...

Embodiment 3

[0042] Take 1200g of the glyphosate concentrated mother liquor (glyphosate=5.2wt%, formaldehyde=4.5wt%) left after concentrating and powdering according to Example 1, add 98% urea 55.1g according to the ratio of formaldehyde and urea 1:0.5 , heated up to 75-80°C, and the heat preservation reaction was completed for 1.0h; cooled to normal temperature, filtered, and the precipitate was removed to obtain a concentrated mother liquor of glyphosate with low formaldehyde content, and the formaldehyde content was analyzed to be 0.056wt%;

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Abstract

The invention relates to a comprehensive treatment method for mother liquid synthesized by oxidizing glyphosate by N-(Phosphonomethyl) iminodiacetic acid with an IDA (Iminodiacetic Acid) method. The mother liquid is treated by a condensed system to obtain condensed liquid and thin liquid, wherein the condensed liquid subjected to formaldehyde removal is used for preparing a gyphosate solution with high content or carrying out oxidation treatment, the treated thin liquid can be used for gyphosate production or biochemical treatment. The comprehensive treatment method not only recovers gyphosate, but also reduces the pollution to the environment.

Description

technical field [0001] The invention belongs to the field of herbicides, and in particular relates to a comprehensive treatment method for waste mother liquor produced in the glyphosate production process. Background technique [0002] Glyphosate is a low-toxicity, high-efficiency, broad-spectrum herbicide. It was first successfully developed by Monsanto Company of the United States in 1974 and has applied for patent protection in many countries around the world. In the mid-to-late 1990s, with the successive expiration of its patent protection in various countries in the world and the widespread planting of glyphosate-resistant transgenic crops, the application of glyphosate has developed rapidly, becoming the largest and fastest-growing pesticide variety. [0003] There are many ways to produce glyphosate at present, and there are mainly two routes to realize industrialized production, one is the glycine route, and the other is the IDA route, wherein the IDA route is divide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/26C07F9/38A01N57/20A01P13/00C01C1/28
Inventor 王伟周曙光陈静杨旭
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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