Regeneration method of titanium silicalite molecular sieve catalyst

Abstract

The invention discloses a regeneration method of titanium silicalite molecular sieve catalyst, and the deactivated titanium silicalite molecular sieve is Ti-MWW molecular sieve which is from the epoxidation reaction of alkene and the ammonia oximation reaction of ketone. The method comprises the following steps: carrying out an acid compound solution treatment and an alkaline compound solution treatment on the deactivated titanium silicalite molecular sieve, then filtering, washing, drying and baking the Ti-MWW molecular sieve, thus obtaining the regenerative titanium silicalite molecular sieve. The invention has the advantages of simple operation, and easy-controlled process and the regenerative titanium silicalite molecular sieve catalytic activity can restore to the level of a fresh agent.

Description

A kind of regeneration method of titanium silicon molecular sieve catalyst technical field The invention relates to the technical field of inorganic chemical synthesis, in particular to a regeneration method of a titanium-silicon molecular sieve catalyst. Background technique Titanium-silicon molecular sieve is the introduction of transition metal titanium atoms into the molecular sieve framework with a certain topology to form a porous crystalline material with catalytic oxidation activity. The mild reaction system formed by using titanium-silicon molecular sieve as catalyst and dilute H2O2 as oxidant shows high activity in organic oxidation reactions such as olefin epoxidation, aromatic hydrocarbon hydroxylation, ketone ammonia oximation, alkane oxidation and alcohol oxidation. Selectivity, forming an environmentally friendly green chemical process in which the by-product is only water, has attracted widespread attention. At present, the titanium-silicon molecular sieve...

AI Technical Summary

Problems solved by technology

However, for titanium-silicon molecular sieve catalysts, it is difficult to recover the catalyst activity through simple high-temperature calcination regeneration treatment.

There is no report on the effective regeneration method of Ti-MWW catalyst of Ti-Si molecular sieve