Method for producing propenyl alcohol

A production method, the technology of propylene alcohol, applied in alcoholysis preparation, organic chemistry, etc., can solve the problems of serious environmental pollution and difficult post-processing, and achieve the effects of high conversion rate of raw materials, easy control and operation, and reasonable technical route

Inactive Publication Date: 2008-03-12
邹平容诚金属科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. Allyl acetate hydrolysis method: post-process

Method used

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  • Method for producing propenyl alcohol
  • Method for producing propenyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Pump 76.5kg of 3-chloropropene (100%, the same below) into the reactor, and put 90.2kg of anhydrous sodium acetate (100%, the same below) and 0.383kg methanol (100%, the same below) from the manhole. Same), close all valves on the kettle, turn on the stirring, slowly turn on the steam and increase the temperature to 60°C~120°C, keep it warm for about 5 hours, cool down and add water for static stratification. The yield of ester was 93%, which was 93 kg. Put the rectified allyl acetate into another rectification kettle, at the same time add 89.3kg methanol (100%, the same below) and 46.5kg epoxy resin, slowly turn on the steam, reflux for 3 hours, first collect the reaction product Methyl acetate, then unreacted methanol, and then allyl alcohol, the yield was 90%, 48.5 kg. Put methyl acetate into another reaction kettle, put into sodium hydroxide solution, slowly heat the reaction, and collect methanol. Stop heating, put the bottom of the kettle into a des...

Example Embodiment

[0031] Example 2

[0032] Pump 76.5kg 3-chloropropene into the reaction kettle, put 98.4kg anhydrous sodium acetate and 0.765kg methanol from the manhole, close all the valves on the kettle, turn on the stirring, slowly turn on the steam and increase the temperature to 60℃~120℃, keep warm After 5 hours, the temperature is lowered and water is added for static stratification. The oil phase is pressed into the rectification kettle and rectified under normal pressure. The yield of allyl acetate obtained is 94.8%, which is 94.8 kg. Put the rectified allyl acetate into another rectification kettle, add 182kg methanol and 15.8kg epoxy resin at the same time, slowly turn on the steam, reflux for 3 hours, first collect the methyl acetate produced by the reaction, and then collect the unreacted Methanol and then propenol were recovered, the yield was 89%, which was 48.9 kg. Put methyl acetate into another reaction kettle, put into sodium hydroxide solution, slowly heat the reaction, and co...

Example Embodiment

[0033] Example 3

[0034] Pump 76.5kg of 3-chloropropene into the reaction kettle, put in 90.2kg of anhydrous sodium acetate and 0.306kg of ethanol from the manhole, close all valves on the kettle, turn on the stirring, slowly turn on the steam and increase the temperature to 60℃~120℃, and keep it warm for about After 5 hours, the temperature is lowered and water is added for static stratification. The oil phase is pressed into the rectification kettle and rectified under normal pressure. The yield of allyl acetate obtained is 76.6%, which is 76.6 kg. Put the rectified allyl acetate into another rectification kettle, add 73.5kg methanol and 38.3kg epoxy resin at the same time, slowly turn on the steam, reflux for 3 hours, first collect the methyl acetate produced by the reaction, and then collect the unreacted And then recover allyl alcohol, the yield is 75%, which is 33.1kg. Put methyl acetate into another reaction kettle, put into sodium hydroxide solution, slowly heat the react...

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Abstract

The present invention belongs to the chemosyntheise field, which relates to a preparation method for allyl alcoh; the method adopts two-step reaction processes that are as follows: (1) sodium acetate is reacted with a 3-chloropropene in the alcohols catalyzer to create a propyl ester acetic acid alkene; (2) the propyl ester acetic acid alkene produced in Step 1 is reacted with a methanol alcohol in the resin catalyzer to create allyl alcoh. The present invention replaces the traditional ''One step'' technics with rational technical process and high conversion ratio for the material; the product is easy to be separated; the post-treatment technics is simpler; the produced waste can be recycled repeatedly; so the present invention can not only save the cost, but also can not pollute the environment; the technics process is stable and easy to be controlled and operated.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, in particular to a production method of propylene alcohol. Background technique [0002] Propyl alcohol is an intermediate of medicine, pesticide and fragrance. It has alcoholic hydroxyl groups and olefinic double bonds in its molecules, and can react with compounds such as ethers, esters, and acetals to obtain a series of important downstream products. There are many industrial synthesis methods of propylene alcohol, which are divided according to the raw material route: mainly 3-chloropropene hydrolysis method, acrolein reduction method, propylene oxide isomerization method and allyl acetate hydrolysis method. Propylene oxide has a large scale and a large output in foreign countries, so the isomerization method of propylene oxide is mainly used. However, domestic production of propylene oxide is small in scale, high in cost, and in short supply, so several other methods are mainly used. [...

Claims

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Application Information

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IPC IPC(8): C07C33/03C07C29/128
Inventor 李信
Owner 邹平容诚金属科技集团有限公司
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