Desulfurizer for decreasing sulfur content of gasoline

Abstract

A kind of hydrocarbon-oil desulfuration agent contains, on the catalyst-weight basis, 15-60% phosphorus-modified and rare-earth-contained Y type zeolite, 10-60% inorganic oxide, and 0-75% clay; and phosphorus-modified and rare-earth-contained Y type zeolite contains, in weight percent, 0.5-8% phosphorus in precense as P2O5 and 18-35% rare-earth is presence as RE2O3. Moreover, the proportion of silicon and aluminium in zeolite is lower than 6. Comparing with the existing technology, the desulfuration agent provided by this invention has a higher acid density, more homogeneous and weaker acid, and higher hydrothermal stability. Additionally, it controls the cracking of cut fraction of the gasoline and has advantages to gasoline's denitrification and desulfuration.

Description

technical field [0001] The invention belongs to the refining of hydrocarbon oil in the absence of hydrogen, more specifically, a desulfurizer for reducing the sulfur content of gasoline. Background technique [0002] With the increase of the processing capacity of high-sulfur crude oil, the sulfur content in oil products also increases accordingly, and the environmental pollution is aggravated, which has aroused widespread concern in various countries. In developed countries, the gasoline specification control index is to limit the gasoline sulfur content to less than 50ppm, and the diesel specification control index is to limit the diesel sulfur content (mass fraction) to less than 0.05% by weight. At present, my country requires that the sulfur content of gasoline products is less than 800ppm, and that the sulfur content of diesel products is not higher than 0.2 wt%. The more effective way to reduce the sulfur content of gasoline and diesel is to use hydrofining and hydro...

AI Technical Summary

Problems solved by technology

However, this method takes a long time and needs to be regenerated with hydrogen