Device and method for continuously isomerizing epoxide

Abstract

The invention relates to a device and a method for continuously isomerizing epoxide, which can be used for continuous isomerizing preparation of corresponding allyl alcohol products from epoxide. Themethod comprises steps as follows: reaction raw materials and carrier gas are preheated to certain temperature, the raw materials are contacted with a regenerated catalyst and a newly supplemented catalyst in a fluidized state in a fluidized bed reactor at a certain air speed, an isomerization reaction is performed under certain pressure, reaction gas and a carbon deposit catalyst are obtained through separation in a settler, wherein reaction gas rises and enters a product separation system via a reaction liquid pipeline at the top of the settler, the carbon deposit catalyst enters a regenerator for regeneration, and the regenerated catalyst returns to a lifting pipe reactor via a regenerated catalyst pipeline. The process has the characteristics of high atom economy, product yield and selectivity and no pollution and is notably superior to a current slurry bed process.

Description

technical field [0001] The invention relates to a circulating fluidized bed process and its application in continuous isomerization, in particular to a device and method for continuous isomerization of epoxides, which can be used for continuous isomerization of epoxides to prepare corresponding allyl Alcohol products. Background technique [0002] Allyl alcohol is an important chemical intermediate and fine chemical product. Because the molecular structure contains two functional groups, double bond and hydroxyl, it can participate in oxidation, reduction, esterification, etherification and addition, etc. It is used in chemicals, medicine , spices and organic synthesis have a wide range of uses. The main derivatives and their uses are: for the synthesis of epichlorohydrin, glycerin, 1,4-butanediol and allyl ketone and other important organic synthetic raw materials, and its important derivative allyl ester is mainly used as a raw material for the production of polymers. mo...

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Problems solved by technology

[0006] Aiming at the problems existing in the above-mentioned prior art, the inventors of the present application have carried out in-depth research, and found that the use of a wear-resistant catalyst and a riser fluidized bed process has successfully solved the problem of solvent loss in the current industrialized liquid phase process. The problem of long residence time and many side reactions improves the reaction activity and reduces the deactivation rate. At the same time, it solves the problems of low product yield and catalyst cannot be continuously regenerated due to high back-mixing in the fixed-bed fluidized-bed process. It has been well applied, and the reaction rate and selectivity have been effectively improved.

[0007] An object of the present invention is to provide a new epoxide isomerization process, which adopts a circulating fluidized bed process and successfully solves the problems of solvent loss, long reaction residence time and many side reactions in the current liquid phase process

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