Normal butane method-based maleic anhydride production line

Abstract

The invention discloses a normal butane method-based maleic anhydride production line. The normal butane method-based maleic anhydride production line is characterized in that a counterbalance valve is used for isolation of pressure inside and outside a reactor system so that necessary reaction pressure is kept in the reactor and normal pressure is kept outside the reactor. The pressure outside the system is greatly reduced and is close to normal pressure so that a safety risk of the device outside the reactor system is reduced, the pressure vessel is changed into an unpressurized vessel and device purchase and maintenance costs are reduced.

Description

Technical field [0001] The invention relates to the technical field of butane method maleic anhydride production, in particular to a butane method maleic anhydride process production line. Background technique [0002] Maleic anhydride is the third largest organic anhydride in the world after phthalic anhydride and acetic anhydride. Before the 1960s, the benzene oxidation method was a main raw material route for the preparation of maleic anhydride. However, because the two carbon atoms on the benzene ring were consumed and oxidized to carbon dioxide, the utilization rate of benzene was low and the environmental pollution was serious. The application of maleic anhydride production equipment newly installed in other countries is decreasing. In 1962, the American Petro-Tex Company developed the process of producing maleic anhydride by the oxidation of n-butene. In 1974, the American Monsanto Company took the lead in realizing the industrial production of maleic anhydride by the oxi...

AI Technical Summary

Problems solved by technology

Before the 1960s, the benzene oxidation method was a main raw material route for the preparation of maleic anhydride, but because the two carbon atoms on the benzene ring were consumed and oxidized into carbon dioxide, the utilization rate of benzene was low, and the environmental pollution was serious, so in The application of new maleic anhydride production facilities in other countries is decreasing

[0003] The existing butane process for producing maleic anhydride is required to control the pressure at 180-220kpa in the reaction section, so the heat exchange equipment connected to the front and back of the reaction system must be pressure equipment, limited by the working pressure, the heat exchanger of the system after the reaction is generally The shell and tube heat exchanger is adopted, and the shell and tube heat exchanger has the disadvantages of large volume, heavy equipment, small heat exchange area, and high cost.

Moreover, since multiple sections are pressure equipment, it also affects production safety

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