Refining purification method for glyphosate by-product industrial salt

The technology of a by-product industry and a purification method is applied in the field of refining and purifying the by-product industrial salt of glyphosate, which can solve the problem of high processing cost, and achieve the effects of avoiding the generation of three wastes, improving the utilization rate of raw materials and reducing the production cost.

Inactive Publication Date: 2019-05-03
ZHENJIANG JIANGNAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN106475398A discloses a process for the treatment of industrial salt organic matter. This method converts organic matter into carbonated salt output by means of drying, decomposition, and carbonization. The air heating furnace and other processes involved in the high-temperature carbonization need to control the temperature at 1000°C- 1100°C, the processing cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (a) concentrating and crystallizing the dilute glyphosate mother liquor, and centrifuging the slurry obtained after concentrating and crystallizing to obtain crude product salt. The salt content of the dilute glyphosate mother liquor is 16%;

[0022] (b) The crude salt is subjected to a stirring and beating washing with a dilute glyphosate mother liquor whose mass is 1.0 times that of the crude salt, and the washed slurry is centrifuged to obtain a first-grade crude salt and a washing liquid;

[0023] (c) The primary crude salt is subjected to secondary stirring, beating, and washing with glyphosate production process water with 1.0 times the mass of crude salt, and the washed slurry is filtered in a centrifuge to separate the secondary washing water; The machine is sprayed with glyphosate production process water with 0.1 times the mass of crude salt to obtain refined industrial salt and three washing water;

[0024] (d) In the purification of the next batch of refined...

Embodiment 2

[0027] (a) concentrating and crystallizing the dilute glyphosate mother liquor, and centrifuging the slurry obtained after concentrating and crystallizing to obtain crude product salt, the salt content of the dilute glyphosate mother liquor is 15%;

[0028] (b) The crude salt is subjected to a stirring and beating washing with glyphosate dilute mother liquor with 0.8 times the mass of the crude salt, and the washed slurry is centrifuged to obtain the first-grade crude salt and a washing solution;

[0029] (c) The primary crude salt is subjected to secondary stirring and beating washing with glyphosate production process water of 0.8 times the crude salt quality, and the washed slurry is filtered in a centrifuge to separate the secondary washing water; The machine is sprayed with glyphosate production process water with 0.15 times the mass of crude salt to obtain refined industrial salt and three washing water;

[0030] (d) In the purification of the next batch of refined indus...

Embodiment 3

[0033] (a) concentrating and crystallizing the dilute glyphosate mother liquor, and centrifuging the slurry obtained after concentrating and crystallizing to obtain crude product salt, the salt content of the dilute glyphosate mother liquor being 20%;

[0034] (b) The crude salt is subjected to a stirring and beating washing with a dilute glyphosate mother liquor having 1.5 times the mass of the crude salt, and the washed slurry is centrifuged to obtain a first-grade crude salt and a washing solution;

[0035] (c) The primary crude salt is subjected to secondary stirring and beating washing with glyphosate production process water of 0.6 times the mass of the crude salt, and the washed slurry is filtered in a centrifuge to separate the secondary washing water; The machine is sprayed with glyphosate production process water with 0.16 times the mass of crude salt to obtain refined industrial salt and three washing water;

[0036] (d) In the purification of the next batch of refi...

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Abstract

The invention discloses a refining purification method for a glyphosate by-product industrial salt. The treatment method comprises the following steps: (a) performing concentration crystallization ona glyphosate diluted mother liquid to obtain a crude-product salt; (b) performing primary stirring beating washing on the crude-product salt to obtain a first-stage crude-product salt and a primary washing liquid; and (c) performing secondary stirring beating washing on the first-stage crude-product salt by adopting glyphosate production process water, and performing filtration separation on the washed slurry in a centrifugal machine to obtain secondary washing water; and performing spraying by adopting glyphosate production process water in the centrifugal machine to obtain a refined industrial salt and tertiary washing water. The treatment method provided by the invention can treat the glyphosate by-product industrial salt to obtain the refined industry salt, and compared to the prior art, the method provided by the invention not only improves quality of the industrial salt, but also avoids production of new three wastes (waste water, waste gas and solid waste).

Description

technical field [0001] The invention relates to the technical field of recovery of by-product industrial salt, and more specifically relates to a method for refining and purifying glyphosate by-product industrial salt. Background technique [0002] As the world's largest herbicide, glyphosate has the characteristics of low toxicity, non-selectivity and no residue, accounting for 30% of the global herbicide market share. In 2017, my country's glyphosate output was 685,000 tons. A large amount of by-product salts are produced in the glyphosate production process, about 0.8 tons of by-product salts are produced for every ton of glyphosate produced. With the domestic environmental protection department increasing the intensity of the environmental protection work of the glyphosate industry, the requirements for the treatment of industrial waste salt are also getting higher and higher. At present, the glyphosate industry generally takes the first The waste salt is extracted fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/14
Inventor 詹波朱建民刘冰姜胜宝秦虹王垚郑敏张吉范宝琪孙洁
Owner ZHENJIANG JIANGNAN CHEM
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