Highly attrition resistant mesoporous catalytic cracking catalysts

Patent · Tue Jun 22 04:00:00 EDT 1993

OSTI ID:6418946

Wachter, W A

A catalytic cracking catalyst is described for converting a hydrocarbon feedstock at elevated temperature in the substantial absence of hydrogen, into lower average molecular weight, lower boiling hydrocarbon transportation fuel which comprises a crystalline aluminosilicate zeolite having a silica:alumina mole ratio greater than 2:1, and uniform pore diameters ranging from about 4 Angstroms to about 15 Angstroms in diameter, in concentration ranging from about 30% to about 60%, based on the total weight of the catalyst, a matrix comprised of silica and clay within which the crystalline aluminosilicate zeolite is dispersed, said matrix being characterized as porous and the pores as having a bimodal pore size distribution, as measured by mercury porosimetry, a first mode wherein from about 80% to about 90% of the pore volume measured between 45 Angstroms and 2,000 Angstroms is in pores ranging from about 160 Angstroms in diameter to about 400 Angstroms in diameter, and a second mode wherein from about 5% to about 10% of the pores are of diameter ranging above about 100 Angstroms to about 160 Angstroms, and the attrition-resistance of the catalyst, as measured by the Davison Index ranges from about 1 to about 8, wherein the silica matrix portion of said catalyst is prepared from a silica sol made via an ion-exchanged process, and an acidic silica sol prepared by the reaction of sodium silicate, an acid and an aluminum salt, and an aluminum salt of a mineral acid, and wherein the sol is not converted to a gel during catalyst preparation.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ (United States)
• Patent Number(s): A; US 5221648
• Application Number: PPN: US 7-816021
• OSTI ID: 6418946
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYST SUPPORTS
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRACKING
CRYSTAL STRUCTURE
DECOMPOSITION
FRAGMENTATION
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POROSITY
PYROLYSIS
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
THERMOCHEMICAL PROCESSES
WEAR RESISTANCE
ZEOLITES