Acetic acid and acetic anhydride carbonyl reaction kettle for gas liquid ejecting combined slurry bed

Abstract

The invention discloses an acetic acid and acetic anhydride carbonyl reaction kettle of a gas-liquid injection combined slurry bed. The reaction kettle includes a kettle body, a fixed tray and a gas phase material injection pipe. A liquid phase outlet is provided, a liquid phase distribution pipe is provided on the upper part of the kettle body, a gas phase distribution pipe is provided on the lower part of the kettle body, at least one fixed tray installed in the kettle body is arranged between the liquid phase distribution pipe and the gas phase distribution pipe, each The lower part of the fixed tray is provided with at least one gas-phase material injection pipe extending from the outside into the kettle body, and each gas-phase material injection pipe is radially distributed along the kettle body. The invention has reasonable structure, good mass transfer effect, is conducive to the full contact of gas phase flow and liquid phase flow, all kinds of materials can be fully fused, the stability of gas-liquid uniform distribution is improved, the processing capacity is large, and various problems of external stirring devices are avoided. kind of unfavorable factors.

Description

technical field [0001] The invention relates to a slurry bed acetic acid and acetic anhydride carbonyl reaction kettle. Background technique [0002] The production of acetic anhydride by carbonylation is a new process for the preparation of acetic anhydride developed by Eastman Company of the United States in the 1980s. In 1983, Eastman Company first used the carbonylation method of methyl acetate to build a 227,000 t / a acetic anhydride plant. Afterwards, the British Pretroleum Company of the United Kingdom and the Celanese Company of the United States successively developed the acetic acid-acetic anhydride co-production process, which greatly impacted the traditional production methods of acetic anhydride—ketene method and acetaldehyde oxidation method. The process of producing acetic anhydride by carbonylation of methyl acetate gets rid of the dependence on petroleum raw materials and is a C 1 A major breakthrough in the development of chemical large-scale industrializat...

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Problems solved by technology

[0004] Because the reaction kettle with agitator has high sealing requirements, high production and operation costs, and the failure of the equipment will seriously affect the reaction process. At the same time, the vortex field generated by the agitation affects the mass transfer between the gas-liquid phase reaction medium and the catalyst system. , which in turn affects the conversion rate and selectivity of the system reaction

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