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Method for preparing glyphosate preparation with 30 to 70 percent of effective ingredient by glyphosate mother liquid

A technology of glyphosate mother liquor and active ingredients, applied in the directions of botanical equipment and methods, chemicals for biological control, herbicides and algicides, etc., to reduce steam consumption, reduce treatment costs, and reduce production wastewater treatment amount of effect

Inactive Publication Date: 2009-12-02
ZHEJIANG LINGHUA CHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentrated mother liquor obtained by existing methods can only be formulated into low-concentration glyphosate water

Method used

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  • Method for preparing glyphosate preparation with 30 to 70 percent of effective ingredient by glyphosate mother liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) The glyphosate base mother liquor in glyphosate production is prepared by the dimethyl phosphite method. After removing solid impurities by microfiltration, it continuously enters the primary membrane separation device to separate the light mother liquor and the refined mother liquor. The refined mother liquor contains glyphosate Phosphine 5-10%, salt concentration <2.0%, the light mother liquor enters the secondary membrane separation device to separate the secondary light mother liquor and concentrated mother liquor, the concentrated mother liquor returns to the inlet of the primary membrane separation device, and the secondary light mother liquor contains glyphosate<0.2 %;

[0017] 2) Add 30% glyphosate raw powder, 5% alkyl polyglycoside glyphosate CGN-3 additive (manufactured by Yangzhou Chenhua) and 3.5% ammonia to prepare 30% active ingredient in the essence mother liquor glyphosate solution;

[0018] 3) The second-level light mother liquor is concentrated by ...

Embodiment 2

[0020] 1) The glyphosate base mother liquor in glyphosate production is prepared by the dimethyl phosphite method. After removing solid impurities by microfiltration, it continuously enters the primary membrane separation device to separate the light mother liquor and the refined mother liquor. The refined mother liquor contains glyphosate Phosphine 5-10%, salt concentration <2.0%, the light mother liquor enters the secondary membrane separation device to separate the secondary light mother liquor and concentrated mother liquor, the concentrated mother liquor returns to the inlet of the primary membrane separation device, and the secondary light mother liquor contains glyphosate<0.2 %;

[0021] 2) Add 72% glyphosate former powder, 20% alkyl polyglycoside glyphosate CGN-3 auxiliary agent (produced by Yangzhou Chenhua), 30% potassium hydroxide (or 33% Potassium carbonate) is prepared into the glyphosate aqueous solution of active ingredient 41%;

[0022] 3) The second-level lig...

Embodiment 3

[0024] 1) The glyphosate base mother liquor in glyphosate production is prepared by the dimethyl phosphite method. After removing solid impurities by microfiltration, it continuously enters the primary membrane separation device to separate the light mother liquor and the refined mother liquor. The refined mother liquor contains glyphosate Phosphine 5%, salt concentration 0.8%, the light mother liquor enters the secondary membrane separation device to separate the secondary light mother liquor and concentrated mother liquor, the concentrated mother liquor returns to the inlet of the primary membrane separation device, and the secondary light mother liquor contains glyphosate<0.2%;

[0025] 2) Evaporate and concentrate the essence mother liquor to a glyphosate mother liquor content of 10%, then add 30% glyphosate powder and 3% alkyl polyglycoside glyphosate CGN-3 additive (Yangzhou Chenhua production), 3.5% ammonia is prepared into a glyphosate water solution with 30% active ing...

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Abstract

The invention discloses a method for preparing glyphosate preparation with 30 to 70 percent of effective ingredient by glyphosate mother liquid. The method comprises the following steps that: mother liquid containing 1 to 4 percent of glyphosate in production of the glyphosate is prepared by a dimethyl phosphite method, and enters a primary film separation device to separate light mother liquid and extract mother liquid, wherein the extract mother liquid contains 5 to 10 percent of the glyphosate, and has salt concentration less than 2.0 percent; the light mother liquid enters a secondary film separation device to separate thick mother liquid and secondary light mother liquid, and the thick mother liquid returns to the inlet of the primary film separation device; after the extract mother liquid is subjected to pretreatment, the extract mother liquid is added with glyphosate raw powder, accessory ingredient and ammonia (or one of isopropylamine, potassium hydroxide and potassium carbonate) to be prepared into 30 to 70 percent glyphosate preparation; the secondary light mother liquid is subjected to multieffect evaporation concentration, crystallization, centrifugal separation and dry recovery of a byproduct NaCl; and after the separated mother liquid is oxidized, the mother liquid is added with calcium hydroxide to remove phosphor and precipitate calcium phosphate. The method prepares the glyphosate preparation over 30 percent by the glyphosate mother liquid, recovers the byproduct in the mother liquid, and greatly reduces treatment amount of wastewater producing the glyphosate.

Description

technical field [0001] The invention relates to the research field of the mother liquor treatment process obtained from glyphosate production. More specifically, the invention relates to a method for preparing glyphosate preparations with 30-70% active ingredients by using glyphosate mother liquor. A method for preparing a high-concentration glyphosate preparation by using the mother liquor obtained from the glyphosate production by the dimethyl phosphite method, so as to fully recycle and utilize effective components, reduce the amount of wastewater treatment, and reduce the treatment cost of the mother liquor. Background technique [0002] Glyphosate is a high-efficiency, low-toxicity, low-residue, broad-spectrum and systemic non-selective herbicide. Because of its superior performance, it has developed into the largest herbicide variety in the world. [0003] The main synthesis methods of glyphosate include chloroacetic acid method, dimethyl phosphite method, iminodiacet...

Claims

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Application Information

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IPC IPC(8): A01N57/20A01N25/02A01N25/12C02F9/10C01B25/32A01P13/00C02F1/04C02F1/44
Inventor 金桂方刘根夫毛毓琴周旭俊沈红武
Owner ZHEJIANG LINGHUA CHEM GROUP
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