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 combination type slurry bed, which includes a kettle body, fixed column trays and gas phase material injection pipes, wherein, a gas phase outlet is provided on the top of the kettle body, a liquid phase outlet is provided on the bottom of the kettle body, a liquid phase distribution pipe is provided on the upper part in the kettle body, a gas phase distribution pipe is provided on the lower part in the kettle body, at least one fixed column tray mounted in the kettle body is provided between the liquid phase distribution pipe and the gas phase distribution pipe, at least one gas phase material injection pipe extending into the kettle body from the outside is provided on the lower part of each fixed column tray, and each gas phase material injection pipe is radially distributed along the kettle body. The structure of the invention is reasonable, the effect of mass transfer is good, which is favorable to the sufficient contact between gas pahse material flow and liquid phase material flow, various materials can sufficiently merge with one another, the stability of uniform gas-liquid distribution is increased, processing ability is high, and various disadvantages of an externally hung dasher can be avoided.

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...

AI Technical Summary

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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