초록 ▼

Hydrocarbon feedstocks containing relatively high levels of nitrogen contaminants are converted by catalytic cracking to products of lower average molecular weight by contacting the feedstock under cracking conditions with a cracking catalyst having a surface area of at least 150 m2/gm and comprisin

Hydrocarbon feedstocks containing relatively high levels of nitrogen contaminants are converted by catalytic cracking to products of lower average molecular weight by contacting the feedstock under cracking conditions with a cracking catalyst having a surface area of at least 150 m2/gm and comprising greater than about 25 weight percent of a rare earth exchanged Y zeolite dispersed in a matrix containing a synthetic silica-alumina component in which the weight ratio of silica-to-alumina is equal to or greater than about 0.5.

대표청구항 ▼

A process for the catalytic cracking of a hydrocarbon feedstock containing between about 0.25 and about 0.80 weight percent total nitrogen, calculated as the element, which comprises contacting said feedstock with a cracking catalyst under cracking conditions in the substantial absence of added mole

A process for the catalytic cracking of a hydrocarbon feedstock containing between about 0.25 and about 0.80 weight percent total nitrogen, calculated as the element, which comprises contacting said feedstock with a cracking catalyst under cracking conditions in the substantial absence of added molecular hydrogen in a cracking zone to convert components of said feedstock into lower molecular weight weight constituents, wherein said cracking catalyst has a surface area of at least 150 m2/gm and comprises between about 25 weight percent and about 40 weight percent of a rare earth exchanged Y zeolite dispersed in a matrix comprising a clay and a synthetic silica-alumina component in which component the weight ratio of silica-to-alumina is greater than or equal to about 0.50 and wherein individual concentrations of nickel and vanadium in said hydrocarbon feedstock are less than about 1.0 ppmw.