Process for producing epoxy chloropropane through direct oxidization with titanium silicalite molecular sieve catalyst

Abstract

The invention provides a process for producing epoxy chloropropane through direct oxidation with a titanium silicalite molecular sieve catalyst. The method comprises the following steps: pumping a prepared methanol catalyst mixed solution and fresh chloropropene into a first mixer through a metering pump; mixing with hydrogen peroxide pumped into the first mixer, and carrying out a reaction in a first tubular reactor; performing gas-liquid two-phase separation on a reaction product through a separator; mixing the separated liquid phase part with hydrogen peroxide sent to a second mixer and then feeding the mixture into a second tubular reactor for reaction; feeding a reaction product into a second separator for gas-liquid separation, and sending a final reaction product into a separation tank to separate a solid catalyst and a liquid-phase product, pumping the catalyst slurry back into a blending tank to be blended again, and withdrawing a liquid product from a filter at the upper partof the separation tank.

Description

technical field [0001] The invention belongs to a process for directly oxidizing epichlorohydrin with a titanium-silicon molecular sieve catalyst, and belongs to the field of chemical product production processes. Background technique [0002] Epichlorohydrin is a highly functional organic synthesis raw material and intermediate with a wide range of uses. It is used in the preparation of epoxy resin, glycerin, polyether polyol, etc., and is an important raw material for the production of glycerin and glycidol derivatives. At present, the main methods for preparing epichlorohydrin include: propylene high-temperature chlorination method, propylene acetate method, glycerin method, etc. Although these processes are relatively mature in technology, they all have unavoidable shortcomings, such as: serious corrosion to equipment, high energy consumption quota, high requirements on raw material purity, many by-products, large amounts of waste water, serious damage to the environmen...

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Problems solved by technology

[0008] In view of the defects in the prior art, the technical problems to be solved in the present invention are: the effective utilization rate of hydrogen peroxide is low, the separation and recovery of the catalyst is difficult, the process unit load is relatively large, etc.

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