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A kind of recycling process of mother liquor in the process of producing glycine by chloroacetic acid method

A technology of glycine and chloroacetic acid, which is applied in the direction of ammonium halide, etc., can solve the problems of low recovery rate, low quality of ammonium chloride, mother liquor pollution, etc., and achieve the effects of increasing economic benefits, good quality, and saving energy

Active Publication Date: 2016-08-24
SICHUAN LESHAN FUHUA TONGDA AGRO-CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention aims to solve the problems of low ammonium chloride quality and low recovery rate in recovering glycine mother liquor in the prior art, and the environmental pollution of mother liquor still exists, and provides a process for recycling mother liquor in the process of producing glycine by chloroacetic acid method , to achieve the harmless treatment of glycine mother liquor, and at the same time to recover high-quality ammonium chloride at a high recovery rate

Method used

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  • A kind of recycling process of mother liquor in the process of producing glycine by chloroacetic acid method

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Effect test

Embodiment 1

[0033]A kind of recycling process of mother liquor in the process of producing glycine by chloroacetic acid method comprises the following process steps:

[0034] A. Concentration

[0035] Concentrate the mother liquor earlier to obtain the mother liquor concentrate and the separated solid ammonium chloride;

[0036] B. Incineration

[0037] Pass the concentrated mother liquor obtained after concentration into an incinerator for incineration, and the incineration temperature is controlled at 700°C;

[0038] C. crystallization

[0039] Pass the gas produced by incineration into a cyclone with cooling for crystallization, the crystallization temperature is controlled at 80°C, and ammonium chloride is precipitated by crystallization.

Embodiment 2

[0041] A kind of recycling process of mother liquor in the process of producing glycine by chloroacetic acid method comprises the following process steps:

[0042] A. Concentration

[0043] Concentrate the mother liquor earlier to obtain the mother liquor concentrate and the separated solid ammonium chloride;

[0044] B. Incineration

[0045] Pass the concentrated mother liquor obtained after concentration into an incinerator for incineration, and the incineration temperature is controlled at 1000°C;

[0046] C. crystallization

[0047] Pass the gas produced by incineration into a cyclone with cooling for crystallization, the crystallization temperature is controlled at 300°C, and ammonium chloride is precipitated by crystallization.

Embodiment 3

[0049] A kind of recycling process of mother liquor in the process of producing glycine by chloroacetic acid method comprises the following process steps:

[0050] A. Concentration

[0051] Concentrate the mother liquor earlier to obtain the mother liquor concentrate and the separated solid ammonium chloride;

[0052] B. Incineration

[0053] Pass the concentrated mother liquor obtained after concentration into an incinerator for incineration, and the incineration temperature is controlled at 850°C;

[0054] C. crystallization

[0055] Pass the gas produced by incineration into a cyclone with cooling for crystallization, the crystallization temperature is controlled at 190°C, and ammonium chloride is precipitated by crystallization.

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Abstract

The invention relates to a recovery and utilization process of mother liquor in the process of producing glycine by chloroacetic acid method, and belongs to the technical field of glycine production. The present invention concentrates, incinerates and crystallizes the glycine mother liquor, and adopts specific incineration temperature and crystallization temperature, so that the loss of ammonium chloride is small, the recovery rate of ammonium chloride can reach more than 95%, and the glycine mother liquor is recycled to the greatest extent. The high-quality ammonium chloride in it will not only cause no environmental pollution, but also increase economic benefits. The process of the invention also has the advantages of simple process and equipment, and easy operation.

Description

technical field [0001] The invention relates to a resource recovery and utilization process in the production of glycine, more specifically, the invention relates to a recovery and utilization process of mother liquor in the production of glycine by chloroacetic acid method, which belongs to the technical field of environmental protection. Background technique [0002] The existing industrialized glyphosate production technologies mainly include the IDA method and the alkyl ester method. In China, the production of glyphosate by the alkyl ester method is the main method, and glycine is the main raw material for the production of glyphosate by the alkyl ester method. Since the advent of glyphosate, the application of glyphosate has become more and more extensive, and the demand has been increasing, and the demand for glycine has also increased. At present, the domestic production of glycine is mainly based on the ammonolysis method of chloroacetic acid. This process uses chl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/16
Inventor 姜永红蒋冲雨廖霞罗均
Owner SICHUAN LESHAN FUHUA TONGDA AGRO-CHEM TECH CO LTD
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