Method for preparing high-selectivity propylene and hydrogen peroxide gas-phase epoxidation catalyst through gas-solid phase reaction of white carbon black and TiCl4

• Main Authors: GAO BIZE, GUO HONGCHEN, ZHU QUANREN, LIU HONGWEI
• Format: Patent
• Language: Chinese; English
• Published: 22.01.2021
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; HETEROCYCLIC COMPOUNDS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a method for preparing a high-selectivity propylene and hydrogen peroxide gas-phase epoxidation catalyst through a gas-solid phase reaction of white carbon black and TiCl4, andbelongs to the technical field of petrochemical engineering catalysts. According to the method, TiCl4 is grafted to white carbon black through a gas-solid phase reaction to obtain a titanium graft ofsilicon oxide, then the titanium graft is dispersed in a tetrapropylammonium cation template agent aqueous solution, and a TS-1 zeolite crystallization product can be obtained only by adding an extremely small amount of tetrapropylammonium cation template agent. On the basis, alkali metal ions are further used for carrying out controlled hydrothermal modification on the TS-1 zeolite crystal compound in the presence of an extremely small amount of tetrapropylammonium cation template agent, so the catalyst which has high catalytic activity and high selectivity for propylene and hydrogen peroxide gas-phase epoxidation re