Membrane separation reactor used for production of p-xylene

Abstract

The invention discloses a membrane separation reactor used for production of p-xylene. The reactor comprises a reactor main body, wherein the reactor main body comprises, in successive arrangement from top to bottom, an upper sealing head, a drum body, a lower sealing head and a skirt support; an upper tube plate is arranged between the upper sealing head and the upper end of the drum body; a lower tube plate is arranged between the lower sealing head and the lower end of the drum body; a hollow cavity is arranged between the upper tube plate and the lower tube plate; the hollow cavity of the drum body is provided with ceramic membrane elements which are tubular porous ceramic membranes; the ceramic membrane elements are uniformly distributed inside the drum body and is in fixed and sealed arrangement between the upper tube plate and the lower tube plate; meanwhile, two ends of the ceramic membrane element respectively pass through the upper tube plate and the lower tube plate; the upper sealing head and the lower sealing head are in communication via the ceramic membrane elements arranged inside the drum body; the upper sealing head is provided with a discharge outlet I; the lower sealing head is provided with a feed inlet; and the side surface of the drum body is provided with a discharge outlet II. The membrane separation reactor provided by the invention does not need outside thermal energy in the separation process for p-xylene, and has significant economic benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a membrane separation reactor for p-xylene production. Background technique [0002] Xylene is an important basic raw material, especially p-xylene. P-xylene is the basic raw material for synthetic polyester (PET). At present, p-xylene is mainly produced by using toluene, C9 aromatics and mixed xylene as raw materials, which are prepared by disproportionation, isomerization, adsorption separation or cryogenic separation. Because the content of p-xylene in the product is controlled by thermodynamics, p-xylene only accounts for about 24% of the C8 mixed aromatics, and the material circulation is very large in the process, and the operating cost is relatively high. In recent years, many patents at home and abroad have disclosed many new routes for preparing p-xylene. Among them, the technology of preparing p-xylene from methanol and toluene through methylation has been hi...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a membrane separation reactor for p-xylene production, which solves the problems of high energy consumption and waste of manpower and material resources in the prior art for preparing p-xylene by separating xylene through a rectification tower

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