Method for recycling by-product 2-ethylacraldehyde from reaction process of preparing trimethylolpropane by condensing and hydrogenating method

A technology of trimethylolpropane and ethylacrolein, which is applied in the field of recovery and utilization of the by-product 2-ethylacrolein in the reaction process of preparing trimethylolpropane by condensation hydrogenation, can solve the problem of low selectivity, Affecting TMP yield and other issues, achieving high economic utilization and reducing reaction costs
CN102304022AInactive Publication Date: 2012-01-04SHANGHAI 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
2012-01-04
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a method for recycling a by-product 2-ethylacraldehyde from a reaction process of preparing trimethylolpropane by a condensing and hydrogenating method. The method comprises the following steps of: taking the main by-product 2-ethylacraldehyde (EA) generated at a condensation stage of aldol in trimethylolpropane prepared by condensing and hydrogenating method as the raw material; separating and reacting the raw material with formaldehyde under the alkaline condition; and finally, obtaining trimethylolpropane (TMP). According to the invention, more than 90% of the EA can be basically transformed and the selectivity of the generated TMP is more than 90%; the method improves the economic utilization of the raw material and the reaction cost is reduced as well. The method provided by the invention also can directly utilize the commercial grade EA and formaldehyde to react under the alkaline condition so that the EA can be transformed into TMP.
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Description

technical field

[0001] The present invention relates to a recovery and utilization method of by-product 2-ethylacrolein in the reaction process of preparing trimethylolpropane by condensation hydrogenation method, in particular to a method for the recovery and utilization of by-product 2-ethylacrolein in the reaction process of preparation of trimethylolpropane by condensation hydrogenation method The by-product 2-ethylacrolein is recovered for use in the process for the preparation of trimethylolpropane. Background technique

[0002] Trimethylolpropane (TMP) is an important fine chemical product with a low melting point (58.8°C) and three methylol groups in its molecular structure, which can react with organic acids to form monoesters or polyesters , react with aldehydes and ketones to form acetals and ketals, and react with diisocyanates to form carbamates, etc. It is widely used in the production of aviation lubricants, plasticizers, surfactants, alkyd resins, polyuretha...

Claims

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