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Production method for improving raw material utilization rate and glyphosate ammonium salt yield

A technology of glyphosate ammonium salt and production method is applied in the field of continuous production technology of glyphosate ammonium salt, which can solve the problem of insufficient utilization rate of raw materials, achieve mature reaction principle, realize efficient utilization rate, reaction speed and continuity good effect

Inactive Publication Date: 2011-12-21
NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: To overcome the shortcomings of the traditional glyphosate ammonium salt raw material utilization rate is not high enough, to provide a continuous production method to improve the raw material utilization rate and glyphosate ammonium salt yield

Method used

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  • Production method for improving raw material utilization rate and glyphosate ammonium salt yield
  • Production method for improving raw material utilization rate and glyphosate ammonium salt yield
  • Production method for improving raw material utilization rate and glyphosate ammonium salt yield

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The weight ratio of the glyphosate, water and the alcohol or aldehyde organic solvent is 1:0.8:3, and the alcohol or aldehyde organic solvent is methanol.

[0042] When the by-produced ammonia gas in step 1 is not enough for step 3, add ammonia gas separately; when the mother liquor of glyphosate ammonium salt obtained in step 5 is not enough for step 3, add glyphosate solid and water separately; and alcohol or water in step 5 When the aldehyde organic solvent is not enough for step four, additional methanol is supplied.

[0043] The crystallization and precipitation of the ammonium glyphosate salt is continuously performed in a cooling type crystallizer.

Embodiment 2

[0045] The weight ratio of the glyphosate, water and the alcohol or aldehyde organic solvent is 1:1:5, and the alcohol or aldehyde organic solvent is ethanol.

[0046] When the by-produced ammonia gas in step 1 is not enough for step 3, add ammonia gas separately; when the mother liquor of glyphosate ammonium salt obtained in step 5 is not enough for step 3, add glyphosate solid separately; and alcohols or aldehydes in step 5 When the organic solvent is not enough for step 4, additional ethanol is added.

[0047] The crystallization and precipitation of the ammonium glyphosate salt is continuously performed in a cooling type crystallizer. The 0.2%-2% glyphosate ammonium salt mother liquor obtained in the fifth step is not recycled, but is directly used to prepare a 35% glyphosate ammonium salt solution.

Embodiment 3

[0049] The weight ratio of the glyphosate, water and the alcohol or aldehyde organic solvent is 1:0.5:2, and the alcohol or aldehyde organic solvent is formaldehyde.

[0050] When the by-produced ammonia gas in step one is not enough for step three, additional ammonia gas is supplied; when the alcohol or aldehyde organic solvent in step five is not enough for step four, formaldehyde is additionally supplied.

[0051] The crystallization and precipitation of the ammonium glyphosate salt is continuously performed in a cooling type crystallizer. The 1%-2% glyphosate ammonium salt mother liquor obtained in the fifth step is directly used to prepare a 40% glyphosate ammonium salt solution.

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Abstract

The invention provides a production method for improving the utilization rate of raw materials and the yield of glyphosate ammonium salt. The reaction solution composed of glyphosate, water and ammonia is used to synthesize glyphosate ammonium salt. Add the amount to adjust the pH value to 4-5. After the reaction is complete, add an alcohol or aldehyde organic solvent to crystallize glyphosate ammonium salt. The weight ratio of glyphosate, water and alcohol or aldehyde organic solvent is 1:0.1-2:1-5 . The synthesis route from raw materials to finished products contains a variety of reaction steps. The by-products of ammonia gas, glyphosate ammonium salt mother liquor, or alcohol or aldehyde organic solvents can be recycled and used as other reactions. The raw materials of the steps will be replenished separately if they are not enough. The reaction principle of each reaction step of the present invention is mature, the reaction route is clear, and the reaction speed and continuity are good; at the same time, the recovery and utilization rate of main raw material resources in the present invention is high, and the yield of glyphosate ammonium salt is improved.

Description

Technical field [0001] The invention relates to a production process of glyphosate ammonium salt in agrochemicals, in particular to a continuous production process of glyphosate ammonium salt that improves the utilization rate of raw materials. Background technique [0002] The agrochemical glyphosate ammonium salt is usually produced by the synthesis reaction of glyphosate, water and ammonia gas. Its raw materials can have a variety of physical states, and its raw materials and process parameters can also have a variety of options. [0003] The United States Monsanto Company is a world-renowned glyphosate manufacturer. It has successively developed two synthesis technologies related to glyphosate formulations to prepare high-content glyphosate ammonium salts, and has obtained invention patents in my country. The process disclosed in the specification "Preparing ammonium glyphosate from aqueous ammonium hydroxide solution in a liquid-solid reaction system" with the patent applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/38
Inventor 张海滨薛健张小宏
Owner NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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