Drying device and method for triethylamine in production process of glyphosate

Abstract

The invention provides a drying device and method for triethylamine in production process of glyphosate. To be specific, a tower-type automatic gradient drying technology is adopted, drying is performed through a first-stage drying tower, a secondary drying tower, a third-stage drying tower and a four-stage drying tower stage by stage; an orifice plate is mounted at the bottom inside each stage of the drying towers; aqueous alkali can flow into the bottom of each tower through corresponding orifice plate; a hot water coil is arranged at the bottom of each tower, hot water generated by other procedures is led to the hot water coils, and the discharged liquid alkali is collected for being continuously used by other procedures. According to the invention, the amount of triethylamine and solid alkali in the drying towers and the temperature inside the drying towers are controlled stage by stage, so that the water content of the triethylamine is reduced; the recovery ratio of the triethylamine obtained by adopting the device and the method can reach above 96%.

Description

technical field [0001] The invention relates to a drying device and a drying method for triethylamine in the production process of glyphosate. Specifically, a tower-type gradient automatic drying process is adopted to effectively reduce the moisture after recovering the triethylamine. Background technique [0002] In the production of glyphosate, the catalyst triethylamine uses 99% caustic soda in the drying process, and the equipment used is a reactor stirring type. After intermittently putting triethylamine into the kettle, the caustic soda is manually put into the kettle , start stirring, use time control to judge, stop stirring after 2 hours, and take samples for analysis. The process requires a moisture content of 0.1%, but the drying effect is often poor, and the moisture content is maintained between 0.2-0.3% for a long time. [0003] High moisture in triethylamine will lead to high moisture in the glyphosate synthesis liquid, and the hydrolysis of dimethyl phosphite...

AI Technical Summary

Problems solved by technology

The process requires moisture at 0.1%, but the drying effect is often poor, and the moisture is maintained at 0.2-0.3% for a long time

[0003] High moisture in triethylamine will lead to high moisture in the glyphosate synthesis solution, and the hydrolysis of dimethyl phosphite will be too fast, resulting in a low yield of glyphosate

Lead to higher consumption of caustic soda and longer drying time

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