Refining process method of by-product salt on production line of glyphosate

A process method, glyphosate technology, applied in the field of environmental protection, can solve the problems of waste of sodium chloride resources, high equipment requirements, high burning costs, etc., and achieve the effect of low processing cost, high economic and social benefits, and mild reaction conditions

Active Publication Date: 2015-11-11
HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the common method for treating glyphosate wastewater is to concentrate the glyphosate mother liquor through a membrane separation system to recover glyphosate, but in order to elute the high-concentration salt in the mother liquor, 3-4 stages of nanofiltration are required. process, it is estimated that more than 1.4 tons of nanofiltration dilute liquid will be produced for every ton of mother liquor treated; while the sodium chloride obtained by evaporating and crystallizing glyphosate wastewater has a high content of organic matter, which is expressed as tota

Method used

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  • Refining process method of by-product salt on production line of glyphosate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Get 5kg of by-product salt obtained on the glyphosate production route prepared by glycine method, clean with cleaning agent, control the mass ratio of cleaning agent consumption and solid salt to be 1:1, the cleaning time is 30min, and the number of times of cleaning is 1 time, and then Vacuum filtration was performed to obtain a solid salt. The solid salt was reconstituted into a solution with a NaCl content of 300g / L. The total organic carbon TOC measured was 158.6mg / L, the total nitrogen TN was 29.05mg / L, and the TP was 93.2mg / L.

[0030] Adjust the pH of the prepared brine to 10 with 1mol / L NaOH, and then conduct nanofiltration membrane separation, control the membrane inlet pressure at 2.0MPa, the temperature at 13.1±2°C, and the concentration ratio of the nanofiltration membrane is 5 times by mass When the nanofiltration membrane separation is stopped. The measured total organic carbon (TOC) of nanofiltration membrane weak liquid is 26.29mg / L, total nitrogen (TN...

Embodiment 2

[0033]Get 5kg of by-product salt obtained on the glyphosate production route prepared by glycine method, clean with cleaning agent, control the mass ratio of cleaning agent consumption and solid salt to 7:5, the cleaning time is 20min, and the number of times of cleaning is 1 time, and then Vacuum filtration was carried out, and the solid salt was obtained after vacuum drying. The solid salt was reconstituted into a solution with a NaCl content of 300g / L. The total organic carbon TOC was measured to be 301.45mg / L, the total nitrogen TN was 53.97mg / L, and the TP was 185mg / L.

[0034] Use 1mol / L NaOH to adjust the pH of the prepared brine to 10, and then perform nanofiltration membrane separation. Control the membrane inlet pressure at 2.6MPa, the temperature at 14.7±2°C, and the concentration ratio of the nanofiltration membrane is 5 times by mass. When the nanofiltration membrane separation is stopped. The measured total organic carbon (TOC) of nanofiltration membrane weak li...

Embodiment 3

[0037] Get 5kg of by-product salt obtained on the glyphosate production route prepared by glycine method, clean with cleaning agent, control the mass ratio of cleaning agent consumption and solid salt to 3:1, the cleaning time is 10min, and the number of times of cleaning is 1 time, and then Vacuum filtration was carried out, and the solid salt was obtained after vacuum drying. The solid salt was reconstituted into a solution with a NaCl content of 300g / L. The total organic carbon TOC was measured to be 301.45mg / L, the total nitrogen TN was 53.97mg / L, and the TP was 185mg / L.

[0038] Adjust the pH of the prepared brine to 10 with 1mol / L NaOH, and then conduct nanofiltration membrane separation, control the membrane inlet pressure at 2.6MPa, the temperature at 14.7±2°C, and the concentration factor of the nanofiltration membrane calculated as 5 times by mass Stop the nanofiltration membrane separation. The measured total organic carbon (TOC) of nanofiltration membrane weak liq...

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Abstract

The invention belongs to the technical field of environment protection and relates to a refining process method of by-product salt on a production line of glyphosate. The method is specifically applied to the treatment of waste water of glycine glyphosate mother liquor and treatment of by-product salt in the industries of PMIDA mother liquor, iminodiacetic acid mother liquor, trimethyl phosphate mother liquor and chlor-alkali; due to the fact that the solid waste salt on the production process line of glyphosate contains a large amount of organic matters, the solid waste salt can not be applied but serve as industrial waste salt. By means of the process method, most organic matters in the solid salt can be removed, the purpose of purifying the solid salt is achieved, the purified solid salt or refined saline water can be used for other industries such as chlor-alkali production and caustic soda production, the resource utilization of the waste is achieved, and great economic benefit and social benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a refining process of by-product salt on a glyphosate production route, which is specifically applied to the treatment of glycine glyphosate mother liquor wastewater, diglyphosate mother liquor, iminodiacetic acid mother liquor, and trimethyl phosphate Treatment of mother liquor and by-product salt in the chlor-alkali industry. Background technique [0002] Glyphosate was successfully developed by Monsanto in the United States in 1971 and is mainly used in the field of genetically modified crops. Its mechanism of action is to kill plants by inhibiting photosynthetic phosphorylation and ATPase activity in plants. The world's genetically modified crops mainly include soybeans and corn, accounting for 78% of the world's planted area of ​​genetically modified crops. [0003] The discharge of glyphosate wastewater is very large, and every 1 ton of glyphosate produced ...

Claims

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Application Information

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IPC IPC(8): C01D3/14
Inventor 赵经纬邱晖谢柏明丁国良汪勇程棋波
Owner HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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