Method for preparing titanium modified Cr/silica catalyst

• Main Authors: LI, MING, ZHAO CHONG, DIEING LARS, HU YUNLONG R
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Preparing PVgt; a process for preparing a high PV titanium modified Cr/silica (Cr/Ti/silica) catalyst precursor of 1.5 mL/g, comprising: providing a silica support, typically based on desired porosity, purity, particle size, and particle size distribution; providing a coating solution containing a Cr-containing compound, a Ti-containing compound and a solvent; mixing the coating solution with the silica support to form a catalyst preparation mixture; and drying the catalyst preparation mixture to produce a Cr/Ti/silica catalyst precursor. The Cr/Ti/silica catalyst is surprisingly resistant to the presence of water in the catalyst preparation mixture, as shown, which has negligible effects on the pore volume (PV) and MI potential of the Cr/Ti/silica catalyst precursor when containing water in a molar ratio of H2O: Ti of 2 to 50. Catalysts, such as olefin polymerization catalysts, prepared by the process are also disclosed. 制备PV>1.5mL/g的高PV钛改性的Cr/二氧化硅(Cr/Ti/二氧化硅)催化剂前体的方法，包括：提供二氧化硅载体，通常基于所需的孔隙率、纯度、粒度和粒度分布；提供含有含C