Multi component catalyst and its use in catalytic cracking
First Claim
1. A catalytic cracking process for selectively producing C3 olefins, said process comprising contacting under catalytic cracking conditions, a feedstock containing hydrocarbons having at least 5 carbon atoms with a catalytic cracking catalyst comprising catalytically effective amounts of a multicomponent catalyst comprising:
- (a) a first molecular sieve component having an intermediate pore size; and
(b) a second molecular sieve component having a structure type that is different from said first molecular sieve and a pore size index of at least one channel of said second molecular sieve which is less than the pore size index of at least one channel of said first molecular sieve; and
wherein said multicomponent catalyst provides recovering a higher propylene conversion, by weight percent, than with either said first component or said second component alone.
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Abstract
A multi component catalyst and catalytic cracking process for selectively producing C3 olefins. The catalyst comprises a first molecular sieve having an intermediate pore size, a second molecular sieve and, optionally a third molecular sieve having a large pore size. At least one of the channels of the second molecular sieve has a pore size index that is less than the pore size index of at least one channel of the first molecular sieve. The process is carried out by contacting a feedstock containing hydrocarbons having at least 5 carbon atoms is contacted, under catalytic cracking conditions, with the multi component catalyst. The catalyst finds application in the cracking of naphtha and heavy hydrocarbon feedstocks.
40 Citations
33 Claims
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1. A catalytic cracking process for selectively producing C3 olefins, said process comprising contacting under catalytic cracking conditions, a feedstock containing hydrocarbons having at least 5 carbon atoms with a catalytic cracking catalyst comprising catalytically effective amounts of a multicomponent catalyst comprising:
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(a) a first molecular sieve component having an intermediate pore size; and (b) a second molecular sieve component having a structure type that is different from said first molecular sieve and a pore size index of at least one channel of said second molecular sieve which is less than the pore size index of at least one channel of said first molecular sieve; and wherein said multicomponent catalyst provides recovering a higher propylene conversion, by weight percent, than with either said first component or said second component alone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification