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System for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol

A technology of methoxymethyl and tetrafluorobenzyl alcohol, which is applied in the field of continuous production, can solve the problems of high by-products and low purity of crude benzyl alcohol, and achieve the effects of high production safety, short reaction time and convenient operation

Pending Publication Date: 2017-08-25
中山致安化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of low purity and high by-products of benzyl alcohol prepared by the above method, the present invention provides a device for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol

Method used

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  • System for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol
  • System for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol
  • System for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol

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Embodiment 1

[0039] Such as figure 1 As shown, prepare the aqueous solution of dialcohol alkali, and the molar ratio is diol: caustic soda: reaction water=1:1.5:8 ingredients, prepared and placed in its aqueous solution storage tank V03 for subsequent use; toluene, dimethyl sulfate Add toluene raw material storage tank V01 and dimethyl sulfate raw material storage tank V02 respectively, the molar ratio of materials is diol: dimethyl sulfate: toluene=1:1.5:3; toluene pump P01 and dimethyl sulfate pump P02 is fed at a flow rate of 1.31 liters / minute and 0.86 liters / minute respectively, and the heat exchange setting is 60 degrees. After entering the mixer MR01, the dialcohol alkali aqueous solution after heat exchange with the first heat exchanger E01 is in the microchannel reactor MR02 Inlet confluence, in which the flow rate of dialcohol-alkali water pump P03 is controlled to 1.78 liters per minute, the heat exchange setting is 60 degrees, the back pressure of the back pressure valve I BPV0...

Embodiment 2

[0041] Such as figure 1 As shown, the preparation of diol alkali aqueous solution is diol: tablet alkali: reaction water=1:1.8:5 ingredients in molar ratio, prepared and placed in its dialcohol alkali aqueous storage tank V03 for subsequent use; toluene, dimethyl sulfate Add to toluene raw material storage tank V01 and dimethyl sulfate raw material storage tank V02 respectively, the molar ratio of materials is diol: dimethyl sulfate: toluene=1:1.2:5; toluene pump P01 and dimethyl sulfate pump P02 is fed at a flow rate of 4.38 liters / minute and 1.38 liters / minute respectively, and the heat exchange setting is 70 degrees. After entering the mixer MR01, the aqueous solution of dialcohol alkali after heat exchange with the first heat exchanger E01 is in the microchannel reactor MR02 Inlet confluence, in which the flow rate of dialcohol-alkaline water pump P03 is controlled to 3.54 liters per minute, the heat exchange setting is 70 degrees, and the back pressure of the first back p...

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Abstract

The invention relates to a system for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol, which comprises a toluene material storage tank, a dimethyl sulfate material storage tank, a diol-alkali aqueous solution storage tank, a first heat exchanger, a mixer, a microchannel reactor, a first-stage layering tank group, a second-stage layering tank group, a washing mixer, a post-washing reaction liquid receiving tank, a second heat exchanger, a continuous desolventizer, a methylbenzene recovery tank, and a final product tank. A preparation process includes the following steps: a diol-alkali aqueous solution is prepared for later use; the diol-alkali aqueous solution is heated, dimethyl sulfate and toluene are mixed and heated, the diol-alkali aqueous solution and the dimethyl sulfate-toluene solution simultaneously enter the reactor and are mixed to react, reaction liquid undergoes layering and washing treatment, the washed reaction liquid is distilled to recover the toluene, and thereby crude benzyl alcohol is obtained. Continuous production is realized, the reaction rate is higher than the conventional reaction rate, the reaction time is short, the efficiency of production is high, the production of the byproduct diether is reduced, production yield is increased, and consumption in production is reduced.

Description

technical field [0001] The invention relates to a device for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol, in particular to a device capable of efficiently and safely continuously producing 2,3,5,6- Device for 4-methoxymethyl-tetrafluorobenzyl alcohol. Background technique [0002] In the production process of 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol (hereinafter referred to as: benzyl alcohol), the main reaction is 2,3,5,6-tetrafluoro-tere-phenylenedimethanol ( This article is referred to as diol) and sodium methylate for methylation, and another method is to do methylation by diol and dimethyl sulfate, but with these methods in the traditional kettle type synthesis process, due to the heat transfer of the reactor The quality effect is relatively poor, and it is easy to have excess product production, that is, a part of the main product generated is easy to continue to react with excess dimethyl sulfate to generate a bis-ether by-product. The main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/16C07C43/178B01J19/00
CPCB01J19/0093C07C41/16C07C43/1786
Inventor 李国江欧雪盈陈浩瀚罗江
Owner 中山致安化工科技有限公司
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