Method for hydrolyzing glyphosate acid

Abstract

The invention relates to a method for hydrolyzing glyphosate. It comprises following steps: mixing prosoma of glyphosate with chlorhydric acid solution, feeding the mixture according to required amount into autoclave, heating for hydrolysis; or feeding the mixture, heating not more than 100 Deg. C, and dropping said mixture into autoclave until meets the required amount, heating again for hydrolysis. The method is characterized by shortened hydrolysis time, increased utilizing rate of autoclave and heat, increased yeild and decreased energy consumption. It aslo solves the damage to autoclave caused by stop- and- go heating in traditional method.

Description

technical field [0001] The invention relates to a hydrolysis reaction operation method in the production process of glyphosate. Background technique [0002] Glyphosate is a widely used herbicide. Since its commercialization in the mid-1970s, its range of applications has continued to expand due to its excellent herbicidal performance. [0003] The industrialized production of glyphosate acid is mainly by two kinds of methods at present: a kind of is the IDA method generally adopted by companies such as U.S. Monsanto, uses diethanolamine as starting raw material production; Another kind of method is as disclosed in document DEOLSNO.P2942898. The alkyl ester method is to heat and dissolve paraformaldehyde or formaldehyde in a methanol solvent containing triethylamine, and then add glycine and dimethyl phosphite (or trimethyl phosphite) for condensation reaction to generate intermediate The triethylamine salt (II) of the body compound dimethyl glyphosate, and then hydrochlor...

AI Technical Summary

Problems solved by technology

It is necessary to cool down the high-temperature reaction kettle before each new feed, which not only causes a great waste of energy, but also causes a large amount of steam valve water to be effectively utilized due to the poor quality of the cooled circulating water, and is released in vain.

At the same time, the reaction time is greatly prolonged, and the reactor is also vulnerable to damage during the frequent hot and cold changes. If the two materials are directly mixed into the reactor, it is often prone to inaccurate ingredients or even wrong feeding.

On the other hand, although the injected two hydrolyzed materials are fed according to the specified load of the reactor, since the materials and solvents in the reaction system are all volatile components, as the temperature rises and the reaction proceeds, the materials in the kettle The amount will gradually decrease, so that the upper empty space in the reactor will continue to increase, resulting in an increase in the ineffective heating ratio of the heating jacket to these empty spaces, resulting in the phenomenon of upper heating and lower cooling of the reactor

According to the current feeding method, this problem is common but cannot be solved

This is not only another factor that increases energy waste, but also reduces reactor utilization, affecting production efficiency and output

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