Method for preventing polymerization in tert-butyl acrylate production process
A technology of tert-butyl acrylate and production process, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of no improvement in the polymerization inhibition method and the like
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[0018] Put acrylic acid, catalyst (strongly acidic cation exchange resin with large pore size, one-tenth of the mass of acrylic acid), polymerization inhibitor and isobutylene into the reactor, control the temperature at 30-35°C, and isobutylene at a space velocity of 0.5m 3 / h is slowly added under the liquid surface to undergo esterification reaction, and at the same time, the space velocity of isobutene is one-tenth that is 0.05 m 3 / h, adding a small amount of dry compressed air by bubbling, stirring to synthesize tert-butyl acrylate, unreacted isobutylene and a small amount of air escape from the vent valve and enter the isobutylene recovery system; wherein, the molar ratio of acrylic acid and polymerization inhibitor is 1 : 0.05, there is no material polymerization phenomenon in the reaction system through observation.
[0019] The mixed reaction solution is directly pumped into the first rectification tower from the fixed bed reactor, the first rectification tower is at...
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