Methyl salicylate synthesis equipment and synthesis process thereof

Abstract

The invention discloses methyl salicylate synthesis equipment which comprises a reaction kettle, a batching device for batching the reaction kettle, a dehydration device for reaction dehydration, anda support device for supporting the reaction kettle and the dehydration device, excessive methanol is added, and the pressure intensity is enhanced through a pressurizing device, so that volatilization of methanol is effectively inhibited, and the yield of methyl salicylate and the reaction rate of esterification reaction are increased; water generated by reaction in the first kettle body is reduced through continuous dehydration, and the effects of inhibiting reverse reaction of esterification reaction and improving the conversion rate of methyl salicylate are achieved by replacing addition of a water-carrying agent; the treatment device condenses and reflows methanol volatilized by the first kettle body, and when dehydration and methanol removal are performed in the second kettle body, the treatment device also condenses and reflows the volatilized methanol, so that the utilization rate of the methanol is increased.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a methyl salicylate synthesis equipment and a synthesis process thereof. Background technique [0002] Methyl salicylate is an important chemical product, originally extracted from holly plants, which not only has the aroma of holly, but also has analgesic and antipyretic effects; as a spice, it is often used as a flavoring agent in pharmaceutical preparations such as oral medicines and paints , and used in chewing gum, ice cream, cola and mouthwash. The preparation of methyl salicylate usually adopts salicylic acid and anhydrous methanol and adds catalyst to carry out esterification reaction preparation, but methanol is easy to volatilize in the preparation process, causes the yield of methyl salicylate to be low, and along with the esterification reaction Carrying out constantly has water generation, reduces the reaction rate of esterification reaction and the conver...

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Problems solved by technology

The preparation of methyl salicylate usually adopts salicylic acid and anhydrous methanol and adds catalyst to carry out esterification reaction preparation, but methanol is easy to volatilize in the preparation process, causes the yield of methyl salicylate to be low, and along with the esterification reaction Continue to generate water, reduce the reaction rate of the esterification reaction and the conversion rate of methyl salicylate

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