System for dehydrating dimethyl carbonate

Abstract

The invention discloses a system for dehydrating dimethyl carbonate. The system comprises a feeding pump, a first dehydrating tower, a second dehydrating tower, a first filter, a cooler and a heater, the feed pump is respectively connected with feed ports of the first dehydrating tower and the second dehydrating tower, and discharge ports of the first dehydrating tower and the second dehydrating tower are respectively connected with the first filter; the heater is respectively connected with air inlets of the first dehydrating tower and the second dehydrating tower; and air outlets of the first dehydrating tower and the second dehydrating tower are respectively connected with the cooler. According to the system for dehydrating dimethyl carbonate, the dehydrating towers are reasonable in structure, the service life of the molecular sieve can be prolonged due to the fact that the air distributors are arranged at the upper end and the lower end, and the dehydrating efficiency is greatly improved through alternate use of the first dehydrating tower and the second dehydrating tower.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a system for dehydrating dimethyl carbonate. Background technique [0002] Dimethyl carbonate (DMC), molecular weight 90.8, relative density 1.07, melting point 4°C, boiling point 90.1°C, colorless liquid at room temperature. It is an environmentally friendly new chemical product that has attracted widespread attention at home and abroad in recent years. Because of its good reactivity and excellent solubility, it can replace phosgene, methylation, dimethyl sulfate, methyl chloride and methyl chloroformate in many fields. Carbonylation, methylation, methylation and lipid exchange reactions of highly toxic or carcinogenic substances such as lipids can produce a variety of important high value-added fine chemicals, which are widely used in medicine, pesticides, synthetic materials, dyes, lubricating oil additives, food Flavor enhancers, electronic chemicals and other fie...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the circulation in the market is industrial-grade dimethyl carbonate, with a moisture content of 0.1-0.2%, but the electrolyte requires a moisture content of less than 0.02%, and dehydration treatment is required. There are two methods of dehydration treatment, physical and chemical. Due to The use of desiccant in chemical methods is easy to bring impurities into the finished product, which affects the purity

[0004] In summary, the existing dimethyl carbonate dehydration method has the problems of easy to bring in impurities and poor dehydration effect, which needs to be further improved urgently

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