Continuous hydrolysis system for preparation of glyphosate by glycine method

Abstract

The invention provides a continuous hydrolysis system for preparing glyphosate by a glycine method. The continuous hydrolysis system is characterized by comprising a hybrid reactor, a gas-liquid separator, a heat exchanger, a methylal recovery tower, a methyl alcohol recovery tower, a hydrolysis tower, a flash evaporator, a heat insulation storage tank and a crystallization kettle, wherein the hybrid reactor is connected with the gas-liquid separator; a liquid discharge hole and a liquid outlet of the gas-liquid separator are respectively connected with the heat exchanger; the heat exchanger is connected with the methylal recovery tower; the methylal recovery tower, the methyl alcohol recovery tower, the hydrolysis tower, the flash evaporator, the heat insulation storage tank and the crystallization kettle are sequentially connected. After the continuous hydrolysis system is adopted, the problem of low efficiency of single-kettle intermittent operation of the traditional multi-hydrolysis kettle can be solved, so that the production efficiency is greatly improved; the product quality and the reaction yield of the continuous hydrolysis system are superior to those of the traditional technology; compared with the traditional technology, the continuous hydrolysis system saves the energy consumption by more than 20%.

Description

technical field [0001] The invention relates to the field of glyphosate production, in particular to a continuous hydrolysis system for preparing glyphosate by a glycine method. Background technique [0002] Glyphosate is an environmentally friendly broad-spectrum herbicide that can effectively remove 76 of the 78 most harmful weeds in the world. With my country's accession to the WTO and the improvement of people's living environment requirements, glyphosate is in line with the development direction of the world's pesticide industry because of its high efficiency, low toxicity, broad spectrum, and no residue. It is the most brilliant chemical pesticide in the world in the 20th century. With the rapid promotion of global glyphosate-resistant transgenic crops in the 21st century, their market prospects will be even broader. [0003] The glycine method occupies a dominant position in the production of glyphosate in China. The most critical link affecting the yield in the pre...

AI Technical Summary

Problems solved by technology

In the experimental scheme in the literature, the methylal gas generated during the acid addition process will form a rush when it enters the reaction tower, which cannot achieve the desired effect, and fails to realize the continuous reaction of the whole hydrolysis process.

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