Method for preparing unsaturated alcohol through selective hydrogenation of alpha,beta-unsaturated aldehyde

A selective hydrogenation and unsaturated technology, applied in the field of selective hydrogenation of β-unsaturated aldehydes to unsaturated alcohols, α, can solve the problems of low conversion rate of raw materials and product selectivity, small production capacity, and difficult separation of catalysts and products , achieve high raw material conversion rate and unsaturated alcohol selectivity, save energy consumption and save separation cost
CN107056566AInactive Publication Date: 2017-08-18SHANGHAI HUAYI GRP CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HUAYI GRP CO
Publication Date
2017-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a method for preparing unsaturated alcohol through selective hydrogenation of alpha,beta-unsaturated aldehyde. A purpose of the present invention is to solve the problems of low production capacity, low raw material conversion rate, low product selectivity and different separation between the catalyst and the product in the prior art. The technical scheme of the present invention comprises that the method for preparing the unsaturated alcohol through the selective hydrogenation of the alpha,beta-unsaturated aldehyde is used, the alpha,beta-unsaturated aldehyde and hydrogen are continuously introduced into a fixed bed reactor, and are subjected to a continuous selective catalytic hydrogenation reaction on a catalyst under a selective reaction condition, the generated product is subjected to gas-liquid separation and rectification to obtain an unsaturated alcohol product and unreacted methacrolein, and the hydrogen obtained through the gas-liquid separation and the unreacted alpha,beta-unsaturated aldehyde obtained after the rectification are recycled. With the technical scheme of the present invention, the problems in the prior art are well solved. The method of the present invention can be used for the preparation of the unsaturated alcohol through the selective hydrogenation of alpha,beta-unsaturated aldehyde.
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Description

technical field

[0001] The invention relates to a method for selectively hydrogenating α and β unsaturated aldehydes to prepare unsaturated alcohols. Background technique

[0002] The selective hydrogenation of α and β unsaturated aldehydes to produce unsaturated alcohols is an important reaction in chemical and chemical production, because the bond energy of C=O is 100kJ.mol larger than that of C=C -1 , it is more difficult to selectively hydrogenate C=O double bonds than C=C double bonds. Therefore, the development of C=O bond selective hydrogenation catalysts with high selectivity and high stability is the key.

[0003] Unsaturated alcohols are important raw materials and intermediates for medicines, spices, pesticides, resins, etc. Usually unsaturated alcohols are prepared by direct reduction of unsaturated aldehydes such as tetrahydrolithium aluminum, sodium borohydride, aluminum isopropoxide, etc. This reaction needs to use a large amount of solvent, and it is diffi...

Claims

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