Multistage resource recycling integrated process for glyphosate mother liquor

A glyphosate mother liquor, resource utilization technology, applied in the chemical industry, phosphorus compounds, inorganic chemistry and other directions, can solve problems such as ecological environment and human harm, soil compaction, etc., to reduce the three wastes treatment, reduce the cost of caustic soda, reduce environmental protection pressure Effect

Active Publication Date: 2016-11-16
福华通达化学股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term application of 10% water agent containing a large amount of inorganic salt

Method used

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  • Multistage resource recycling integrated process for glyphosate mother liquor

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Comparison scheme
Effect test

Embodiment 1

[0034] A kind of multi-stage resource recycling integrated process of glyphosate mother liquor, comprising the following steps:

[0035] A. Send the glyphosate mother liquor into the membrane treatment device to obtain concentrated mother liquor and permeate. In the concentrated mother liquor, 10% is used for glyphosate powder extraction, and 90% is used to complete the operation of step B;

[0036] B. After the concentrated mother liquor is oxidized once and separated by crystallization, a centrifuge filtrate is obtained, and the centrifuge filtrate is sent to a membrane separation system to obtain a concentrate and a permeate;

[0037] C. The concentrated solution obtained by the membrane separation system undergoes secondary crystallization separation, secondary oxidation, and tertiary crystallization separation in sequence, and the centrifugal filtrate is sent to a normal temperature oxidation device to obtain phosphopaste.

Embodiment 2

[0039] A kind of multi-stage resource recycling integrated process of glyphosate mother liquor, comprising the following steps:

[0040] A, sending the glyphosate mother liquor into the membrane treatment device to obtain concentrated mother liquor and permeate, in the concentrated mother liquor, 20% is used for glyphosate powder extraction, and 80% is used to complete the operation of step B;

[0041] B. After the concentrated mother liquor is oxidized once and separated by crystallization, a centrifuge filtrate is obtained, and the centrifuge filtrate is sent to a membrane separation system to obtain a concentrate and a permeate;

[0042] C. The concentrated solution obtained by the membrane separation system undergoes secondary crystallization separation, secondary oxidation, and tertiary crystallization separation in sequence, and the centrifugal filtrate is sent to a normal temperature oxidation device to obtain phosphopaste.

Embodiment 3

[0044] A kind of multi-stage resource recycling integrated process of glyphosate mother liquor, comprising the following steps:

[0045] A. Send the glyphosate mother liquor into the membrane treatment device to obtain concentrated mother liquor and permeate. In the concentrated mother liquor, 15% is used for glyphosate powder extraction, and 85% is used to complete the operation of step B;

[0046] B. After the concentrated mother liquor is oxidized once and separated by crystallization, a centrifuge filtrate is obtained, and the centrifuge filtrate is sent to a membrane separation system to obtain a concentrate and a permeate;

[0047] C. The concentrated solution obtained by the membrane separation system undergoes secondary crystallization separation, secondary oxidation, and tertiary crystallization separation in sequence, and the centrifugal filtrate is sent to a normal temperature oxidation device to obtain phosphopaste.

[0048] In this embodiment, the permeate obtaine...

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Abstract

The invention discloses a multistage resource recycling integrated process for glyphosate mother liquor. The multistage resource recycling integrated process comprises the following steps: the glyphosate mother liquor is fed into a membrane treatment device, and concentrated mother liquor and a permeate liquid I are obtained; one part of the concentrated mother liquor is used for glyphosate powder extraction, the other part of the concentrated mother liquor is subjected to primary oxidation and primary crystallization separation, a primary centrifugal filtrate is prepared and fed into a membrane treatment system, and a concentrated solution and a permeate liquid II are obtained; the concentrated solution obtained in the membrane treatment system is subjected to secondary crystallization separation, secondary oxidation and tertiary crystallization separation, a centrifugal filtrate is fed into a room-temperature oxidation device, and phosphorus paste is prepared. The multistage resource recycling integrated process adopts effective combination of membrane separation, two times of oxidation, three times of crystallization separation, room-temperature oxidation and the like, finally, room-temperature drained water is subjected to biochemical treatment and drained up to the standard, multistage resource treating and recycling of the glyphosate mother liquor are realized, discharge of three wastes and energy consumption are reduced, and cost control is facilitated.

Description

technical field [0001] The invention relates to a multi-stage recovery and integration process of glyphosate mother liquor, specifically relates to a recycling and treatment process of glyphosate mother liquor that can meet industrial discharge standards, and belongs to the technical field of fine chemical waste liquid treatment. Background technique [0002] Glyphosate mother liquor is produced in the separation and washing process of glyphosate synthesis. After the glyphosate synthesis reaction, the process output water filtered out by washing the reaction product is called centrifuge mother liquor or acid mother liquor in the industry (pH<1.0, containing about 24% triethylamine hydrochloride, a small amount of glyphosate, Glyphosate, glycine and other organic substances, and sodium chloride and other inorganic salts), the waste liquid is neutralized by adding alkali, extracted and distilled to recover triethylamine, and its aqueous solution is collectively referred to ...

Claims

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Application Information

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IPC IPC(8): C05B11/00C01D3/06C01B25/30C01B25/32
CPCC01B25/30C01B25/32C01D3/06C01P2006/80C05B11/00Y02P20/10
Inventor 张华杨国华唐建军杨吉景凡李权石好
Owner 福华通达化学股份公司
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