Ion-exchanged ultrastable Y zeolites--3. Gas oil cracking over rare earth-exchanged ultrastable Y zeolites

Journal Article · Fri Sep 01 00:00:00 EDT 1978 · Ind. Eng. Chem., Prod. Res. Dev.; (United States)

DOI:https://doi.org/10.1021/i360067a008· OSTI ID:6884924

Scherzer, J ^[1]; Ritter, R E

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1. W. R. Grace and Co.

A series of lanthanum, cerium, and mixed rare earth exchanged ultrastable Y zeolites were prepared by methods described previously, mixed with 75-90Vertical Bar3< amorphous silica-alumina, and calcined or steam-treated prior to catalytic evaluation. Results for West Texas gas oil cracking at 493/sup 0/C in a pilot fluid catalytic cracking unit showed that rare earth, exchanged ultrastable Y (RE-USY) zeolites are more active than H-USY zeolites. They show good gasoline selectivity, lower coking rates, and higher olefin selectivity than ordinary RE-Y. The gasoline fractions obtained over RE-USY catalysts have a high content of aromatics, olefins, and cyclic allylic hydrocarbons compared with that formed over RE-Y; this is attributed to the lower acid site density in RE-USY. By varying the rare earth input into the zeolite, a series of yield-oriented catalysts can be prepared, each tailored to meet the demand of a particular segment of the refining industry.

• OSTI ID: 6884924
• Journal Information: Ind. Eng. Chem., Prod. Res. Dev.; (United States), Journal Name: Ind. Eng. Chem., Prod. Res. Dev.; (United States) Vol. 17:3; ISSN IEPRA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS OILS
HIGH TEMPERATURE
HYDROCARBONS
INDUSTRIAL PLANTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM REFINERIES
PROCESSING
PYROLYSIS
RARE EARTHS
REFINING
THERMOCHEMICAL PROCESSES
YIELDS
ZEOLITES