Process for treating glyphosate mother liquid

A glyphosate mother liquor and processing technology technology, which is applied in the field of processing technology of mother liquor obtained by synthesizing glyphosate by glycine method, can solve the problems of increased energy consumption, increased total amount of mother liquor, crop damage, etc. The effect of reducing energy consumption and production cost

Active Publication Date: 2005-08-03
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total amount of mother liquor after treatment exists in this process increases (adding 30% sodium hydroxide solution contains a large amount of water), increases the energy consumption when concentrating, and uses this kind of 10% sodium glyphosate containing more sodium chloride After brine agent, the sodium chloride content in the soil is too h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Get 300g glyphosate mother liquor, pass into 30.8g ammonia gas while cooling, be adjusted to PH and be 7. Standing and stratifying, 34.4g of triethylamine in the upper layer was obtained, the lower layer mother liquor was distilled to collect fractions below 110°C, and the fractions were left to stand for stratification again to obtain 34.6g of triethylamine in the upper layer; the remaining mother liquor was distilled under reduced pressure, cooled to normal temperature, and filtered to obtain Ammonium chloride crystal 35.0g (content 78.6%), concentrated mother liquor content is 2.8%.

Embodiment 2

[0017] Get 300g glyphosate mother liquor, pass into 31.4g ammonia gas while cooling, be adjusted to PH and be 7.5. Standing and stratifying, 38.1g of triethylamine in the upper layer was obtained, the lower layer mother liquor was distilled to collect fractions below 110°C, and the fractions were placed in a static state again to obtain 33.1g of triethylamine in the upper layer; the remaining mother liquor was distilled under reduced pressure, cooled to room temperature, filtered, and obtained Ammonium chloride crystal 42.2g (content 82.0%), concentrated mother liquor content is 3.1%.

Embodiment 3

[0019] Get 300g glyphosate mother liquor, pass into 43.2g ammonia gas while cooling, adjust to PH to be 8. Standing and stratifying to obtain 50.0 g of triethylamine in the upper layer, distilling the mother liquor in the lower layer to collect fractions below 110°C, standing and stratifying the fractions again to obtain 20.7 g of triethylamine in the upper layer; distilling the remaining mother liquor under reduced pressure, cooling to normal temperature, and filtering to obtain Ammonium chloride crystal 41.5g (content 82.2%), concentrated mother liquor content is 3.0%.

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Abstract

The present invention relates to the process of treating glyphosate mother liquor from glycine synthesis process. The treating process includes the following successive steps: 1) introducing ammonia into glyphosate mother liquor to regulate pH to 7-10, letting stand and recovering triethylamine from the upper layer; and 2) decompression distilling lower layer of the mother liquor, cooling, filtering to eliminate ammonium chloride crystal and to obtain concentrated ammonium glyphosate liquid. The said treating process has low production cost, low power consumption and environment friendship, and can obtain concentrated liquid with raised effect. Furthermore, glyphosate may be separated from the mother liquor to raise total glyphosate yield.

Description

(1) Technical field [0001] The invention relates to a process for treating mother liquor obtained from glyphosate, in particular to a process for treating mother liquor obtained by synthesizing glyphosate with a glycine method. (2) Background technology [0002] Glyphosate, as an efficient, broad-spectrum, low-toxic and safe organic phosphine post-emergence herbicide, is very effective in the control of perennial deep-rooted weeds and is widely used in agriculture, forestry, animal husbandry, and horticulture. [0003] There are many preparation methods of glyphosate, generally obtained by glycine method or bisglyphosate oxidation method. Glyphosate is usually prepared by the glycine method in China. The method has the advantages of low cost of raw materials, high yield of raw powder, high product purity, etc., but there are many problems in the prior art, such as high energy consumption, high requirements for equipment, and production of glyphosate by the glycine method. ...

Claims

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Application Information

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IPC IPC(8): C07F9/38
Inventor 王伟周曙光邵振威秦龙李丽娟佘慧玲
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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