Technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by membrane method

A technology of glyphosate mother liquor and concentrated solution, which is applied in the fields of chemical instruments and methods, organic chemistry, and compounds of Group 5/15 elements of the periodic table, and can solve the problems of high production cost, long process flow, and short process flow. and other problems, to achieve the effect of low production cost and short process flow

Inactive Publication Date: 2010-08-04
大连屹东膜工程设备有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method that does not affect the purity of powder, has a short process flow and low production cost, aiming at the problems of reducing powder purity, long process flow and high production cost in the existing IDA method glyphosate mother liquor concentration process. Membrane concentration IDA method glyphosate mother liquor crystallization and powder extraction process

Method used

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  • Technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by membrane method
  • Technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by membrane method

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Embodiment Construction

[0016] like figure 1 As shown, the IDA method glyphosate mother liquor with a pH value of 1 to 2 and a concentration of 0.5% to 5.0% is put into the storage tank 1, and the mother liquor is pumped into the membrane module 3 by the high pressure pump 2, and then concentrated through the valve 4 to achieve crystallization. Glyphosate powder, the operating pressure is 10bar-45bar, the operating temperature is 5°C-45°C, the glyphosate mother liquor is separated through the membrane system to obtain the concentrate and permeate; the concentrate with a separation rate of 50%-80% enters the lower The powder is taken in the first process; the permeate is discharged or collected for utilization.

[0017] The membrane module 3 used in the membrane system is a reverse osmosis membrane module or a nanofiltration membrane module, its molecular weight cut-off is 100-300, its type is roll type or plate type, and polyamide membrane or polyamide composite membrane is selected.

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Abstract

The invention relates to a technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by a method, in particular to a technology for concentrating and crystallizing IDA method-produced glyphosate mother liquor by a membrane filtration and separation method, with the advantages of no influence on powder purity, short process flow and low production cost. The IDA method-produced glyphosate mother liquor is processed by a membrane filtration and separation system for concentration to obtain crystallized powder; and the separated concentrated solution containing glyphosate crystallized powder (concentrated solution for short) is to further crystallize in the next procedure to obtain powder, and the separated penetrative solution is discharged or collected for utilization.

Description

technical field [0001] The invention relates to an IDA method glyphosate mother liquor crystallization powder extraction process, in particular to a membrane filtration separation method (abbreviated as membrane method) concentrated IDA method glyphosate mother liquor crystallization powder extraction process. Background technique [0002] The existing process of concentrating the glyphosate mother liquor by the IDA method is: after the mother liquor is adjusted to a pH value, it is concentrated to a certain concentration through a membrane filtration separation system (referred to as a membrane system), and then crystallized and powdered through a subsequent non-membrane process. [0003] There are following main problems in this existing concentration process: [0004] 1. After the pH value of the mother liquor is adjusted, impurity components are introduced, which reduces the purity of the crystalline powder. [0005] 2. It is necessary to crystallize powder through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/38
Inventor 王世展杨微
Owner 大连屹东膜工程设备有限公司
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