Catalyst for non-hydrogenating olefin removal of aromatic hydrocarbon and preparation method for catalyst

Abstract

The invention aims to prepare a catalyst for non-hydrogenating olefin removal of aromatic hydrocarbon by using waste catalytic cracking catalyst. The catalyst for non-hydrogenating olefin removal of the aromatic hydrocarbon is prepared by the following steps: mixing the waste catalytic cracking catalyst with the metal content less than 5,000 ug / g and aluminum oxide dry glue powder; extruding into strips and forming; and roasting at the temperature of 540 DEG C for 4 hours to obtain the catalyst for non-hydrogenating olefin removal of the aromatic hydrocarbon, wherein the mass content of the waste catalytic cracking catalyst is 60 to 80 percent; the aluminum oxide content is 20 to 40 percent; and the acid content of the catalyst is 0.3 to 0.5 mmol / g, the specific surface area of the catalyst is 290 to 320 m<2> / g and the average aperture of the catalyst is 8.5 to 10 nm. When the catalyst is used for catalyzing the non-hydrogenating olefin removal of the aromatic hydrocarbon, the bromine number can be reduced from 3,000 mg / 100 g to below 20 mg / 100 g commonly and the aromatic hydrocarbon loss is less than 0.01 percent.

Description

technical field [0001] The invention relates to a catalyst for removing olefins, more specifically a catalyst for removing trace olefin impurities in aromatic hydrocarbon mixtures without hydrogenation and a preparation method thereof. Background technique [0002] At present, in the petrochemical industry, the production of aromatics mainly adopts catalytic reforming and steam cracking processes. When using these technologies to convert petroleum fractions such as naphtha, light diesel oil, and hydrogenated tail oil into BTX (benzene, toluene, xylene), a small amount of olefin components will be produced, and the general content in the product composition is less than 1%. Due to the presence of carbon-carbon double bonds in the molecular structure of this small amount of olefins, their chemical properties are active. Since the subsequent processing of aromatics, such as xylene isomerization, toluene disproportionation, xylene adsorption separation, benzene alkylation, etc...

AI Technical Summary

Problems solved by technology

Compared with activated clay catalysts, these research results have certain advantages, but the preparation process of the catalyst is complicated, the cost is high, and pollutants such as waste water and waste gas will be discharged to the environment during the catalyst preparation process.