Method for improving reaction yield
AssigneeNovashin Co., Ltd.
InventorsJianchun Yang, Kai Han, Dongmei Yang
Life of this patent
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Abstract
In a catalytic reaction, after a reaction product leaves a catalyst bed, an inert substance with a low temperature is sprayed, and through heat absorption and vaporization processes of the inert substance, the temperature of the reaction product drops rapidly when staying in a catalyst cushion layer at a discharge end of a fixed bed reactor, or in a space formed by the catalyst cushion layer at the discharge end of the fixed bed reactor and a reactor head, or in a space formed by a tube plate at the discharge end of the fixed bed reactor and the reactor head. The residence time of the reaction product is shortened due to the entrance of the inert substance in a gaseous state.
Claims8
A method for improving reaction yield, comprising:
- feeding a raw material feedstock into a fixed bed reactor;
- contacting the raw material feedstock and a catalyst bed in the fixed bed reactor to produce a reaction product stream;
- passing the reaction product stream successively through, a space formed by the catalyst cushion and a reactor head, and an outlet of the fixed bed reactor;
- injecting an inert substance into the catalyst cushion,
- wherein the reaction product stream comprises heat sensitive compounds selected from vinyl acetate, acrylic acid, methacrylic acid, acrylate, methacrylate, methyl methacrylate, ethylenically unsaturated aldehyde, acrolein, methacrolein, propylene, isobutylene, butadiene, and styrene compounds, ethylene oxide, and propylene oxide, and
- wherein the catalyst cushion is a layer of packing material selected from ceramic, glass, and quartz.
Dependencies are inferred from the claim text.