Process method for processing isopropenyl acetate absorption liquid

Abstract

The invention discloses a process method for processing isopropenyl acetate absorption liquid, which comprises the following steps that: 10 DEG C to 90 DEG C isopropenyl acetate absorption liquid is fed into a film evaporator, the film evaporation is carried out at the temperature being 40 DEG C to 200 DEG C, the vacuum degree being 0.001MPa to 0.099MPa and the rotating speed being 10r / min to 800r / min, substances such as acetone, isopropenyl acetate and the like are collected, and then, the residue liquid is subjected to continuous material discharging. The process method has the advantages that the extraction rate of the isopropenyl acetate is high, thermal sensitive substances in the absorption liquid can not easily generate decomposition or polymerization reaction, in addition, the residue liquid quantity is small, the liquid state material discharging can be ensured, the coking in the evaporator can not be caused, the work intensity is reduced, and the on-site environment is improved.

Description

technical field [0001] The invention relates to the technical field of separation, in particular to a process for treating isopropenyl acetate absorption liquid. Background technique [0002] Isopropenyl acetate is an important chemical intermediate and product, which is mainly used as a solvent or electronic grade solvent for Fuchuang ointment. As an excellent acetylation reagent, isopropenyl acetate can react with enol compounds to obtain enol esters or isomerize to form acetylacetone. It can be used as an intermediate raw material for the synthesis of pharmaceutical and chemical intermediates. [0003] The preparation of isopropenyl acetate is first obtained by reacting acetone with ketene in the presence of a catalyst such as acetylsulfonylacetate, and the solution obtained by the reaction is generally called an absorption solution. At present, the method for further extracting isopropenyl acetate from the absorption liquid is a crude distillation process, that is, the ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the low yield of isopropenyl acetate in the existing processing method for isopropenyl acetate absorption liquid, diketene is easy to be highly polymerized into viscous substances, and it is easy to generate viscous solids and coke and expand, resulting in Residual liquid clogging pipes and other defects, and provide a high extraction rate of isopropenyl acetate, heat-sensitive substances in the absorption liquid are not easy to decompose or polymerize, and the remaining residual liquid is small, and can be discharged in a liquid state, without causing damage to the kettle. Coking, process method for treating isopropenyl acetate absorption liquid with reduced labor intensity