Preparation method of amorphous Ti/SiO2 catalyst for gas-phase epoxidation reaction of propylene and hydrogen peroxide

• Main Authors: GAO BIZE, GUO HONGCHEN
• Format: Patent
• Language: Chinese; English
• Published: 15.08.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention belongs to the technical field of catalysis for producing epoxypropane by epoxidation of propylene and hydrogen peroxide, and relates to a preparation method of an amorphous Ti/SiO2 catalyst for gas-phase epoxidation reaction of propylene and hydrogen peroxide. According to the method, low-carbon alcohol is used as a solvent, titanium tetrachloride is grafted on an amorphous silicon dioxide powder carrier in a liquid-solid phase reaction mode, and the amorphous Ti/SiO2 catalyst with high activity and selectivity is prepared. The amorphous Ti/SiO2 catalyst has a titanium active center structure which is completely different from that of a titanium silicalite molecular sieve TS-1. The method disclosed by the invention has important significance for promoting an industrial process of a technology for preparing epoxypropane by gas-phase epoxidation of propylene and hydrogen peroxide, which is carried out at normal pressure and a temperature higher than 100 DEG C and does not participate in a solvent