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Process and equipment for continuously producing glufosinate-ammonium

A technology of glufosinate-ammonium and equipment, which is applied in the field of continuous production of glufosinate-ammonium technology and equipment, can solve the problems of inapplicability to large-scale industrial production, unstable product quality, long production cycle, etc., and avoid post-treatment process , low production cost and high degree of automation

Active Publication Date: 2020-09-15
HEBEI VEYONG BIO CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The batch reaction process has disadvantages such as small output, long production cycle, high labor intensity, unstable product quality, etc., and is not suitable for large-scale industrial production

Method used

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  • Process and equipment for continuously producing glufosinate-ammonium
  • Process and equipment for continuously producing glufosinate-ammonium
  • Process and equipment for continuously producing glufosinate-ammonium

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Embodiment

[0039] Table 1 is the same reaction conditions, the embodiment of different equipment types and parameters, wherein in the amination reaction of step A, the mol ratio of 3-(methylhydroxyphosphono) propanal, ammonium bicarbonate and ammonium cyanide is 1 : 1.2: 1.0, the solubility of ammonium cyanide aqueous solution is 21%, and the total amount of water is 50 times of the molar weight of substrate 3-(methylhydroxyphosphono) propionaldehyde; total phosphorus and ammonium in the hydrolyzate in the described step B The molar ratio of ions is 1:7, and the total water content is 150 times of the total phosphorus molar mass in the solution; the temperature of the tower bottom of the amination tower is 80°C, the pressure inside the tower is 0.20MPa, and the average residence time of the reaction liquid in the tower is 4h; the temperature in the bottom of the hydrolysis tower is 160°C; the pressure inside the tower is 2.0MPa, and the average residence time of the reaction liquid in the...

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Abstract

The invention discloses a process and equipment for continuously producing glufosinate-ammonium. The process comprises the following steps: pumping a prepared ammonium bicarbonate solution, 3-(methylhydroxyphosphonyl)propionaldehyde and an ammonia cyanide aqueous solution into an amination tower in a continuous manner, and carrying out an amination reaction to obtain an aminated liquid, adding theaminated liquid, ammonia water and water into a hydrolysis tower at the same time, performing a hydrolysis reaction, carrying out distilling concentration on the obtained hydrolysate, and crystallizing in a methanol solution to obtain glufosinate-ammonium raw drug. Cyclic utilization of alkali and continuous production of glufosinate-ammonium are achieved, the production cost is low, the automation degree is high, operation is easy and convenient, the labor intensity is low, and the process and the equipment are suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a process and equipment for producing glufosinate-ammonium, in particular to a process and equipment for continuous production of glufosinate-ammonium. Background technique [0002] Glufosinate-ammonium is an organophosphorus herbicide, which can be used in orchards, vineyards, and non-cultivated land to control annual and perennial dicotyledonous and gramineous weeds. Phosphates are the world's second largest GM crop resistant to herbicides. [0003] At present, there are many synthetic technical routes of glufosinate-ammonium at home and abroad, among which the more mature process is the Stricker-Zelinsky method (US6359762), which uses phosphoric acid ester as a raw material to prepare the intermediate 3-(methylhydroxyphosphine acyl) propionaldehyde, and then prepare glufosinate-ammonium through amination and hydrolysis reaction, wherein the hydrolysis reaction is generally carried out under strong acid or strong alkali cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00C07F9/30
CPCB01J19/0006B01J19/0046B01J2219/00033B01J2219/00277C07F9/301
Inventor 范立攀杨达史秀肖马扩王双珠赵立峰李立华贾成国
Owner HEBEI VEYONG BIO CHEM
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