A kind of preparation technology of 2-ethylhexenal and 2-ethylhexanol
A preparation technology of ethylhexenal and 2-ethylhexenal, which is applied in the field of preparation technology of 2-ethylhexenal and 2-ethylhexanol, can solve problems such as side reactions, complicated process, and large energy consumption, and achieve the goal of reaction The process is mild, the process is simplified, and the effect of increasing the alkali concentration
Active Publication Date: 2011-11-30
SHANGHAI HUAYI ENERGY CHEM
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Abstract
The invention provides a preparation process of 2-ethyl-hexenal and 2-ethyl hexanol. The preparation process comprises the following steps: carrying out condensation reaction and dehydration reaction on butyraldehyde used as a raw material under the catalysis action of an alkaline catalyst in a first reactor and a second reactor which are connected in series, thus generating 2-ethyl hexenal, wherein the raw material butyraldehyde contacts the alkaline catalyst aqueous solution in the reactors in a counter-flow mode, and the fresh alkaline catalyst aqueous solution is added into the second reactor. In the process provided by the invention, the reaction occurring in the reactors is milder and has less possibility to generate by-products, therefore the raw material butyraldehyde for the condensation reaction can be directly introduced into an aldehyde condensation section for the condensation reaction as long as the content of n-butyraldehyde in the raw material butyraldehyde is not less than 90wt%; and furthermore, the alkali concentration of the fresh alkaline catalyst is improved, and the emission of the alkaline wastewater is reduced. In addition, crude 2-ethyl hexenal products containing a small amount of impurities, prepared by the preparation process, can be introduced into hydrogenation and rectification sections to prepare 2-ethyl hexanol products.
Application Domain
Organic compound preparationPreparation by hydrogenation +1
Technology Topic
Ethyl phosphateAlkaline catalyst +11
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