Novel reactor for preparing epoxy propane by oxidizing propylene with hydrogen peroxide

Abstract

The invention relates to a novel reactor for preparing epoxy propane by oxidizing propylene with hydrogen peroxide. The novel reactor comprises a reactor shell (5), a heat transfer plate pair bundle (6), a heat transfer medium distribution main pipe (10), a heat transfer medium distribution branch pipe (11), a heat transfer medium collecting main pipe (3) and a heat transfer medium collecting branch pipe (4), wherein the reactor shell (5) is provided with a reaction material inlet (1), a reaction material outlet (8), a heat transfer medium inlet (9) and a heat transfer medium outlet (2), the heat transfer plate pair bundle (6) consists of multiple sets of sub-heat transfer plate pair bundles, one end of each set of sub-heat transfer plate pair bundle is connected with the heat transfer medium inlet (9) through the heat transfer medium distribution branch pipe (11) and the corresponding heat transfer medium distribution main pipe (10), and the other end of each set of sub-heat transfer plate pair bundle is connected with the heat transfer medium outlet (2) through the heat transfer medium collecting branch pipe (4) and the corresponding heat transfer medium collecting main pipe (3). Compared with the prior art, the novel reactor provided by the invention has the advantages of small volume, convenience in catalyst loading, high heat transfer efficiency and flexibility in structure.

Description

technical field [0001] The invention relates to an axial reactor, in particular to a novel reactor for oxidizing propylene with hydrogen peroxide to produce propylene oxide. Background technique [0002] Propylene oxide is an important raw material for the production of polyether, propylene glycol, isopropanolamine, propylene alcohol, non-polyether polyols, etc. Currently, the production methods of propylene oxide mainly include chlorohydrin method, indirect oxidation method (co-oxidation method), Cumene method and hydrogen peroxide oxidation of propylene to propylene oxide method. The main disadvantage of the chlorohydrin method is the use of toxic chlorine gas, severe equipment corrosion and environmental pollution; the indirect oxidation method has high requirements on the quality of raw materials, and the process is lengthy, and the investment scale is large; the essence of the cumene method is still a co-oxidation method. Hydrogen peroxide oxidation of propylene to pro...

AI Technical Summary

Problems solved by technology

Especially for the gas and liquid phases are fed separately, there is no pre-mixing of the feed, due to the limited mixing time and space after entering the reactor, the material is not uniform when entering the catalyst bed, if the tube-and-tube reactor is used, the inhomogeneous material is immediately removed Subdivided into thousands of small units, each tube reacts differently, seriously affecting product performance

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