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Method for recycling and deeply treating heat of oxygen-rich wet oxidation heat of glyphosate mother liquor

A glyphosate mother liquor, wet oxidation technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the complex catalytic oxidation process, low secondary oxidation efficiency, heat The problem of poor utilization rate, etc., can shorten the reaction time, improve the energy utilization rate, and achieve the effect of complete reaction.

Active Publication Date: 2015-09-30
JIANGXI JINLONG CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Treatment methods such as the patented CN 103012474A electrocatalytic oxidation process are relatively complicated; CN101402652A only reduces the sodium chloride content in the mother liquor, and does not carry out effective resource recovery; CN103864040A performs air oxidation, which has low efficiency and low secondary oxidation efficiency. The rate is poor, because the heat of reaction is greater than the activation energy required for the reaction, energy accumulation occurs, and a noble metal catalyst is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Glyphosate and glyphosate mother liquor are produced by glycine method;

[0027] 2) Concentrate the glyphosate mother liquor to COD 60000mg / L, Tp 40000mg / L;

[0028] 3) Mix the concentrated glyphosate mother liquor with compressed air at a mass ratio of 80:14, and adjust the oxygen content in the compressed air to 40% by adding liquid oxygen, and then enter the primary preheater to preheat to 130°C. The material from the primary preheater enters the secondary preheater to be preheated to 230°C, the material passing through the secondary preheater enters the primary reactor for reaction at a temperature of 240°C, and the material passing through the primary reactor enters the waste heat boiler The temperature is lowered to 220°C, and the material passed through the waste heat boiler enters the secondary reactor for reaction at 240°C. The reaction time of the primary reactor and the secondary reactor is both 10 minutes, and the oxidized liquid obtained from the seconda...

Embodiment 2

[0033] 1) Glyphosate and glyphosate mother liquor are produced by glycine method;

[0034] 2) Concentrate the glyphosate mother liquor to COD 50000mg / L, Tp 30000mg / L;

[0035] 3) Mix the concentrated glyphosate mother liquor with compressed air at a mass ratio of 80:12, and adjust the oxygen content in the compressed air to 30% by adding liquid oxygen, and then enter the primary preheater to preheat to 120°C. The material from the primary preheater enters the secondary preheater to be preheated to 220°C, the material passing through the secondary preheater enters the primary reactor for reaction at a temperature of 250°C, and the material passing through the primary reactor enters the waste heat boiler The temperature is lowered to 220°C, and the material passed through the waste heat boiler enters the secondary reactor for reaction at 240°C. The reaction time between the primary reactor and the secondary reactor is 15 minutes, and the oxidized liquid obtained from the seconda...

Embodiment 3

[0040] 1) Glyphosate and glyphosate mother liquor are produced by iminodiacetic acid method;

[0041] 2) Concentrate the glyphosate mother liquor to COD 70000mg / L, Tp 50000mg / L;

[0042] 3) Mix the concentrated glyphosate mother liquor with compressed air at a mass ratio of 80:16, and adjust the oxygen content in the compressed air to 50% by adding liquid oxygen, and then enter the primary preheater to preheat to 140°C. The material from the primary preheater enters the secondary preheater to be preheated to 230°C, the material passing through the secondary preheater enters the primary reactor for reaction at a temperature of 260°C, and the material passing through the primary reactor enters the waste heat boiler The temperature is lowered to 230°C, and the material passed through the waste heat boiler enters the secondary reactor for reaction at 260°C. The reaction time between the primary reactor and the secondary reactor is 10 minutes, and the oxidizing liquid obtained from...

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Abstract

The invention discloses a method for recycling and deeply treating heat of oxygen-rich wet oxidation heat of glyphosate mother liquor, and belongs to the technical field of chemical engineering. The method comprises the following process steps: producing by using a glycine method and an iminodiacetic acid method so as to obtain glyphosate and glyphosate mother liquor; concentrating the glyphosate mother liquor; mixing the concentrated glyphosate mother liquor, compressed air and liquid oxygen, sequentially feeding into a first-stage preheater, a second-stage preheater, a first-stage reactor, a waste heat boiler and a second-stage reactor for treatment, sequentially feeding back an oxidized liquid obtained from the second-stage reactor to the waste heat boiler, the second-stage preheater and the first-stage preheater for heat exchange, cooling to crystallize the oxidized liquid after heat exchange so as to obtain a phosphate product, and concentrating the crystallized oxidized liquid so as to obtain a concentrated liquid and a penetrate liquid; concentrating the penetrate liquid so as to obtain a sodium chloride product, and recycling the distillated liquid as a recycled liquid to be used in a glyphosate production process; performing hydrogen peroxide photo-catalytic oxidation reaction on the concentrated liquid. By adopting the method, the production cost is lowered, and the reaction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for recycling and advanced treatment of glyphosate mother liquid oxygen-enriched wet oxidation heat. Background technique [0002] Due to its low toxicity, high efficiency, low residue, and broad-spectrum, glyphosate is the world's largest sales and fastest-growing pesticide variety, and it is accompanied by the successful development and popularization of glyphosate-based transgenic crops and energy shortages. The sowing and promotion of biofuel crops provides new opportunities for the production of glyphosate. [0003] There are two main synthetic methods for glyphosate production. One is the iminodiacetic acid method, which uses diethanolamine or hydrocyanic acid as the starting material. This method is commonly used by foreign companies such as Monsanto in the United States; the other is the alkyl ester method. , most domestic enterprises adopt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01B25/30C01D3/06
CPCY02P20/129
Inventor 潘力勇刘劭农黄伟果陆宗盛黄剑敏孙照玉何明金龙兴祥钟伟王富玲孙科
Owner JIANGXI JINLONG CHEM
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