Methyl salicylate synthesis equipment and synthesis process thereof

A technology of methyl salicylate and synthetic equipment, which is applied in the direction of carboxylic acid ester preparation, organic compound preparation, and pressure vessels used in chemical processes, etc. It can solve the problem of reducing the reaction rate of esterification reaction, the conversion rate of methyl salicylate, Problems such as low yield of methyl salicylate and easy volatilization of methanol

Pending Publication Date: 2020-07-14
ZHENJIANG GAOPENG PHARMA
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  • Abstract
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  • Claims
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AI Technical Summary

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,

Method used

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  • Methyl salicylate synthesis equipment and synthesis process thereof
  • Methyl salicylate synthesis equipment and synthesis process thereof

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Embodiment Construction

[0019] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

[0020] Such as figure 1 Shown, a kind of methyl salicylate synthetic equipment comprises reactor, is used for the dosing device of batching to reactor, is used for the dehydration device of reaction dehydration, is used to support the supporting device of reactor and dehydration device.

[0021] Such as figure 1 As shown, th...

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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...

Claims

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Application Information

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IPC IPC(8): B01J3/04C07C69/84C07C67/08
CPCB01J3/04C07C67/08C07C69/84
Inventor 李冕王成慧
Owner ZHENJIANG GAOPENG PHARMA
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