Synthetized modification HZSM-5 zeolite catalyst and method for preparing the same and use thereof

Abstract

The present invention relates to one kind of comprehensively modified HZSM-5 zeolite catalyst and its preparation process and use. The process of preparing the catalyst includes the following steps: mixing HZSM-5 zeolite and adhesive in the weight ratio of 1-4, adding sesbania powder and water solution of HNO3 into the mixture to reach sesbania powder concentration of 1-3 wt% and HNO3 concentration of 2-5 wt%, kneading, extruding, drying and roasting to form catalyst carrier intermediate, hydrothermally modifying and organic acid treating the intermediate to obtain catalyst carrier, supporting active metal components onto the carrier, drying, and roasting to form catalyst product. The comprehensively modified HZSM-5 zeolite catalyst is applied in the hydrogenating modification of catalytically cracked gasoline, and can lower its olefin and sulfur content and improve its anti-knock index.

Description

technical field

[0001] The invention relates to a catalyst and its preparation method and application, in particular to a catalyst with comprehensively modified HZSM-5 zeolite as a carrier, its preparation method and application. Background technique

[0002] At present, the high olefin content and sulfur content in FCC gasoline have become the key problems that plague the world's clean gasoline production. In the case of less high-octane reformed gasoline and alkylated gasoline, in order to meet the increasingly stringent clean gasoline standards, FCC gasoline hydro-upgrading has become one of the key technologies for the production of clean fuel for vehicles .

[0003] US Patent No. 5,770,047 introduces a catalyst for desulfurization and olefin reduction mainly developed by Intevep Company, mainly for hydroisomerization. The carrier is MFI type zeolite (such as HZSM-5 or HZSM-12) and Al 2 o 3 , Si(mol) / Al(mol) of zeolite=10~200, specific surface area is 250~1200m 2 / g...