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US 8,137,534 B2Granted
Catalyst compositions for improved fluid catalytic cracking (FCC) processes targeting propylene production
AssigneeUop LLC
InventorsLawrence L. Upson, Lazlo T. Nemeth
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Abstract
Catalyst compositions comprising a siliceous zeolite component, either in separately formed catalyst particles or dispersed in the same binder or matrix as other zeolites of the compositions, are described. The catalyst compositions, for example as blends of three different bound zeolite catalysts, are particularly useful in fluid catalytic cracking (FCC) processes due to the reductions in coke and dry gas yields that allow FCC throughput, which is normally constrained by gas handling and/or catalyst regeneration capacity, to be increased.
Claims18
A fluid catalytic cracking (FCC) process, comprising:
- contacting a heavy hydrocarbon stream with a cracking catalyst composition in an FCC reaction zone to provide an effluent stream comprising C1-C4 hydrocarbons including propylene and gasoline boiling range hydrocarbons,
- wherein said cracking catalyst composition comprises (i) a large pore zeolite, (ii) a medium pore zeolite having a silica to alumina framework molar ratio ranging from about 30 to about 60, and (iii) a third, siliceous zeolite having a silica to alumina framework molar ratio of at least about 100 for a reduced production of dry gas.
Dependencies are inferred from the claim text.