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Method for processing glyphosate mother liquor

The technology of a glyphosate mother liquor and a treatment method is applied in the treatment field of the glyphosate mother liquor of the glycine method, and can solve the problems of low herbicidal efficiency, serious environmental pollution, reduced usage and the like, and achieves simple recovery, simple operation and low cost. Effect

Inactive Publication Date: 2012-07-04
永州广丰农化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because 10% glyphosate sodium saline solution contains a large amount of sodium chloride, the weeding efficiency is low during use, and the environmental pollution is serious. The use has been reduced year by year, and will be eliminated from the herbicide market after 1-2 years

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Get 400g glyphosate acid mother liquor and add triethylamine 100g, after fully stirring, add 98% sodium hydroxide 25g, adjust pH to 9.0, leave standstill layering, the triethylamine salt solution weight of the upper layer is 418.5g, and the glyphosate of the lower layer The phosphine concentrated mother liquor weighs 106.5g, and the glyphosate content is 7.25%;

[0012] Add 30% sodium hydroxide to the triethylamine salt solution to adjust the pH to 12, let it stand for stratification, recover the triethylamine from the upper layer and reuse it in the production of glyphosate, and distill a small amount of triethylamine from the lower layer to enter the sewage treatment system .

[0013] Add 98% sodium hydroxide to the glyphosate concentrated mother liquor to adjust the pH to 11, rectify a small amount of triethylamine, the remaining mother liquor weighs 108.0g, and the glyphosate content is 7.15%, which is used to prepare 30% ammonium glyphosate salt solution .

Embodiment 2

[0015] Get 400g of glyphosate acid mother liquor and add triethylamine 100g, after fully stirring, add 30% sodium hydroxide 90g, adjust pH to 9.3, leave standstill layering, the triethylamine salt solution weight of upper layer is 474.5g, and the glyphosate of lower layer The phosphine concentrated mother liquor weighs 115.5g, and the glyphosate content is 6.65%;

[0016] Add 30% sodium hydroxide to the upper layer triethylamine salt solution to adjust the pH to 12, let it stand for stratification, recover the upper layer triethylamine and reuse it in glyphosate synthesis production, and the lower layer rectifies a small amount of triethylamine to enter the sewage treatment system.

[0017] Add 30% sodium hydroxide to the glyphosate concentrated mother liquor to adjust the pH to 11, rectify a small amount of triethylamine, the remaining mother liquor weighs 126.5g, and the glyphosate content is 6.08%, which is used to prepare 30% ammonium glyphosate salt solution .

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PUM

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Abstract

A method for processing glyphosate mother liquor, comprising the following steps: (1) adding triethylamine as extractant to glyphosate acid mother liquor, mixing evenly, regulating the PH value of theobtained solution to 8-10 by adding alkali for standing and layering, separating the solution to obtain triethylamine salt solution on the upper layer and glyphosate concentrated mother liquor on the lower layer which has 6%-8% of glyphosate; (2) regulating the PH value of glyphosate concentrated mother liquor obtained in step (1) to about 11 by adding alkali, distilling the solution and obtaining a small quantity of triethylamine and a residual mother liquor which can be used to prepare 30% glyphosate ammonium water solution. The invention has the advantages that the operation of the invention is simple and the cost is low, the content of the obtained glyphosate mother liquor reaches 6-8% and sodium chloride in the concentrated mother liquor is few which can be used to prepare 30% glyphosate ammonium water solution.

Description

technical field [0001] The invention relates to a treatment method of glyphosate mother liquor, in particular to a treatment method of glyphosate mother liquor by glycine method. Background technique [0002] Glyphosate is the most widely used herbicide in the international market. It has the characteristics of high efficiency, low toxicity and no residue. At present, my country is the largest production base of glyphosate. There are two main methods for glyphosate production, one is the IDA method, which is widely used by foreign companies, and the other is the glycine method, which is adopted by most domestic enterprises, with a production capacity of more than 300,000 tons per year. When glyphosate is prepared by glycine method, a large amount of Cl-containing - Acidic mother liquor, the main method for most domestic glyphosate production enterprises to treat mother liquor is: add 30% sodium hydroxide solution to the acidic mother liquor, adjust the pH value to 10-12, le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/38A01N57/20A01P13/00
Inventor 吴伦飞周伟忠朱爱华
Owner 永州广丰农化有限公司