Method for producing glyphosate ammonium salt solid preparations

A glyphosate ammonium salt, solid preparation technology, applied in herbicides and algicides, botanical equipment and methods, chemicals for biological control, etc. High consumption of organic solvents, unfavorable environmental protection and other problems, to achieve the effects of high product yield, easy operation and scientific process

Inactive Publication Date: 2008-04-02
捷马化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the raw glyphosate powder needs to be separated in advance, there are many production steps, and the equipment utilization rate is low
The invention patent published on March 17, 2004 (application number: 03131090.7) discloses a method for preparing glyphosate acid by homogeneously oxidizing diglyphosate. Although this method does not need to separate the original powder in advance, it consumes organic solvents , and can not directly obtain glyphosate ammonium salt preparation, there is a large amount of organic solvent consumption, which is not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: In parts by weight, 5000 kg of the glyphosate acid mixed solution obtained by the oxidation of diglyphosate with hydrogen peroxide is put into a reactor, left to stand for 30 minutes, and 2000 kg of the supernatant is separated; the remaining solution is mixed evenly, and the sample is analyzed. The mass fraction of glyphosate acid is 34.05%; control the pressure of the reactor to -0.08Mpa, slowly feed ammonia gas, control the temperature at 75°C, dehydrate while passing ammonia, stop the ammonia flow when the amount of ammonia flow reaches 205kg, and share the After 3 hours, 900kg of water was extracted; 185kg of solid alkyl glycosides and 208kg of ammonium sulfate were added to the above solution, and the mixture was fully stirred and evenly mixed; the solution was pumped to the top of the drying tower by the diaphragm, atomized by the nozzle, and then sprayed into the drying tower for drying At the same time, after being heated by the steam heater, the c...

Embodiment 2

[0026] Embodiment 2: In parts by weight, 5000 kg of the glyphosate acid mixed solution obtained by oxidation of diglyphosate with oxygen is put into a reactor, left to stand for 35 minutes, and 3000 kg of the supernatant is separated; the remaining solution is mixed evenly, and sampling analysis, The mass fraction of glyphosate acid is 48.52%; control the pressure of the reactor to -0.095Mpa, slowly feed ammonia gas, control the temperature at 65°C, dehydrate while passing ammonia, stop the ammonia flow when the amount of ammonia flow reaches 195kg, and share the After 2.5 hours, 550 kg of water was extracted; 200 kg of liquid alkylnaphthalene sulfonate and 150 kg of ammonium sulfate were added to the above solution, and they were fully stirred and mixed uniformly; a part of glyphosate was pre-filled on the bed in the fluidized bed device. Ammonium phosphonate granules and ammonium glyphosate granules can be produced by all known technologies; cold air is heated by a steam heat...

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Abstract

The invention relates to a manufacturing method of a herbicide, the technical proposal of which is to oxidize PMIDA to get mixed glyphosate solution, separate 20-80 percent of mother liquor after keeping stationary with reaction pressure controlled between 0.04MPa and 0.095MPa and reaction temperature controlled between 60 DEG C and 95 DEG C, take partial water from heat reaction to add the agent taking 5-30 percent weight of the mixed glyphosate solution and padding taking 2-15 percent weight of the mixed glyphosate solution into the mixed glyphosate solution; after even stirring, spraying and granulation are to get granules of the glyphosate. The invention is characterized by scientific process, reasonable materials use, simple operation, low production costs and high product yields.

Description

technical field [0001] The invention relates to a method for producing a herbicide, in particular to a method for producing a solid preparation of ammonium glyphosate. Background technique [0002] The chemical name of glyphosate acid is N-phosphonomethylglycine. It is a high-efficiency, low-toxicity and broad-spectrum herbicide with systemic conduction effect, which can effectively control monocotyledonous and dicotyledonous grass weeds of one or two years, and is very effective for perennial deep-rooted weeds. The largest and fastest growing herbicide. There are two main industrialized glyphosate production processes, one is the IDA route with hydrocyanic acid or diethanolamine as the starting material; the other is the dialkyl phosphite route with glycine as the starting material. Both of these two processes can obtain the technical glyphosate with a content of not less than 95%. [0003] Due to the very low solubility of glyphosate acid technical material in water, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/12A01N25/12A01P13/00
Inventor 王文周良徐国明郑端镛邱晖刘小华王中石
Owner 捷马化工股份有限公司
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