Method for producing glufosinate-ammonium with low energy consumption

A glufosinate-ammonium, low-energy-consumption technology, applied in the field of low-energy-consumption production of glufosinate-ammonium, can solve the problems of high operating costs and high energy consumption, and achieve the effects of reduced energy consumption, low energy consumption, and easy collection and separation

Active Publication Date: 2022-04-05
LIER CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] The technical problem solved by the present invention is that the existing method for producing glufosinate-ammonium has high energy consumption and high operating cost

Method used

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  • Method for producing glufosinate-ammonium with low energy consumption

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the experiment, a DN32, 800mm long Hastelloy tube and electric heating were used as the cracking reaction device. The feed rate of methane was 1 cubic / h, and the feed rate of phosphorus trichloride (containing 4.5% carbon tetrachloride) was 1.2kg. / h, the reaction temperature is 600°C, and the pyrolysis product is obtained. The feed rate of xylene at -10°C in the product capture system is 1kg / h, and the high-temperature gas is downstream, and the pyrolysis product is collected at 2.15kg / h, and the components are analyzed and detected. Content: 8.1% methylphosphine dichloride, 44.5% phosphorus trichloride, 46.5% p-xylene, 0.5% carbon tetrachloride;

[0034]The experiment adopts a set of Φ30mm glass rectification tower with θ ring packing inside. The height of the tower is 3 meters (the number of theoretical plates is 70-75). The ratio is 1:1, the temperature at the bottom of the tower is 110°C, the temperature at the top of the tower is 74°C, phosphorus trichloride wi...

Embodiment 2

[0039] Same as Example 1, the trapping agent is adjusted to toluene, and the content of each component of the detected cracking product is: 8.2% methylphosphine dichloride, 44.7% phosphorus trichloride, 46.5% toluene, 0.5% carbon tetrachloride;

[0040] Phosphorus trichloride rectification separation process reflux ratio is replaced by 2:1, the tower top temperature is 74 ℃, the resulting phosphorus trichloride purity is 98%, the methyl phosphine dichloride containing a small amount of phosphorus trichloride and The content of each component of the mixture of toluene is: 14.7% methyl phosphine dichloride, 1.5% phosphorus trichloride, 83.5% toluene;

[0041] The content of triethyl phosphite obtained by rectification after reaction with ethanol is 98%, and the content of toluene recovered by vacuum distillation after acetal reaction is 99.2%;

[0042] It is prior art to obtain glufosinate-ammonium through cyanamide and hydrolysis reaction of acetal, and the method disclosed in ...

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Abstract

A method for producing glufosinate-ammonium with low energy consumption. A trapping agent is used to trap methane and phosphorus trichloride high-temperature cracking materials, and the obtained trapping liquid is rectified to separate most of the phosphorous trichloride, and then React with ethanol to obtain a diethyl methylphosphonite collector solution containing a small amount of triethyl phosphite, rectify and separate the heavy component triethyl phosphite, then react with acrolein to prepare acetal, and finally pass through cyanamide glufosinate-ammonium through chemical reaction and hydrolysis.

Description

technical field [0001] The invention belongs to the technical field of herbicide glufosinate-ammonium production, in particular to a method for producing glufosinate-ammonium with low energy consumption. Background technique [0002] The structural formula of glufosinate-ammonium is: It was first successfully developed by the German Hoechst company (now owned by Bayer), and it is a non-selective contact herbicide. At present, glufosinate-ammonium can be used in orchards, vineyards, non-cultivated land, potato fields and other environments to control annual and perennial dicotyledonous and gramineous weeds, perennial grassy weeds and sedges, with good results , is an excellent substitute for paraquat, and its quick-acting and ability to solve resistant weeds is better than glyphosate. [0003] Zhuang Jianyuan and Hu Xiaoxing reviewed the industrial synthesis methods of glufosinate-ammonium in "Discussion and Enlightenment of Overseas Industrialization Routes of Glufosinate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/30
CPCC07F9/301
Inventor 尹英遂范谦曾柏清张继旭彭启才蔡隆昌李岳东周波左翔
Owner LIER CHEM CO LTD
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