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Equipment and process for recovering glyphosate solvent during production with glycine method

A recovery equipment and glyphosate technology, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of hydroxyl compounds, etc., can solve the problems of high labor intensity, discontinuous operation, high energy consumption, etc., and achieve the degree of automation High efficiency, wide application prospects and high energy consumption

Active Publication Date: 2015-08-19
HUBEI TAISHENG CHEM
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Problems solved by technology

Dilute methanol enters the distillation system for recovery after neutralization; this technology is discontinuous in operation, labor-intensive, low in yield and high in energy consumption

Method used

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  • Equipment and process for recovering glyphosate solvent during production with glycine method

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Embodiment 1

[0025] Glyphosate produced by the glycine method will produce a large amount of mixed gases such as methyl chloride, methanol, methylal, and water vapor in the process of desolventization and deacidification. The traditional process is to condense the mixed gas through three stages, methanol, methylal, water (dilute methanol) are condensed and enter the storage tank, and the uncondensed methyl chloride (entrained methanol, methylal) enters the methyl chloride recovery device. Dilute methanol is neutralized with liquid caustic soda, and the neutralized liquid is injected into the rectification system to recover methanol formal. The traditional process has high energy consumption, high consumption in the recovery process of methyl chloride, and low content of methyl chloride. Through technical research, a gas phase recovery process was invented. The process is to directly enter the mixed gas in the process of desolventization and deacidification into the neutralization tower, d...

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Abstract

The invention provides equipment and a process for recovering a glyphosate solvent during production with glycine method, particularly relates to a glyphosate solvent recovery continuous production and gas-phase method recovery technology, and aims to overcome the defects of operation intermittence, high labor intensity, high energy consumption, low methyl chloride purity and the like in the prior art. Continuous production in an entire procedure is realized, so that the content of methyl chloride is increased to 99.9 percent, and the energy consumption is lowered. The equipment and process are widely applied to the field of glyphosate production.

Description

technical field [0001] The invention relates to a novel solvent recovery equipment and process for producing glyphosate by a glycine method, and specifically relates to a solvent recovery technology by a gas phase method. Background technique [0002] Glyphosate is a high-efficiency, low-toxicity, broad-spectrum destructive systemic herbicide developed by Monsanto in the 1970s. It has occupied the first place in the world's pesticide sales for many years. With the large-scale planting of genetically modified glyphosate-resistant crops such as soybeans and corn, the global demand for glyphosate continues to increase. At present, there are two mainstream production processes of glyphosate in China: the glycine method (one-step method) and the iminodiacetic acid method (two-step method, first synthesizing diglyphosate, and then oxidizing the diglyphosate to be called glyphosate). The foreign production process is mainly the iminodiacetic acid method of Monsanto Company of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/38C07C19/03C07C29/76C07C31/04C07C41/58C07C43/30
Inventor 田义群徐森军覃立忠王瑞宝
Owner HUBEI TAISHENG CHEM
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