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US 8,128,879 B2Granted
Apparatus for increasing weight of olefins
AssigneeUop LLC
InventorsJoao Jorge da Silva Ferreira Alves, James E. Rekoske, Christopher P. Nicholas
Life of this patent
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Abstract
The apparatus converts FCC olefins to heavier compounds. The heavier compounds are more easily separated from the unconverted paraffins. The heavier compounds can be recycled to an FCC unit or delivered to a separate FCC unit. Suitable conversion zones are oligomerization and aromatic alkylation zones.
Claims19
An apparatus for converting olefins to larger compounds to make FCC feed comprising:
- a process fractionation column for separating an overhead stream comprising a C3-rich overhead stream from a C5-rich bottoms stream;
- an aromatic alkylation reactor in communication with a bottoms line of said process fractionation column for alkylating olefins in said C5-rich bottoms stream with aromatics;
- a product column in communication with said aromatic alkylation reactor for separating alkylaromatics from unreacted compounds from said C5-rich bottoms stream;
- and
- an FCC reactor in communication with a bottoms line of said product column.
2 more elements
An apparatus for converting olefins to larger compounds to make FCC feed comprising:
- a process fractionation column for separating an overhead stream comprising a C3-rich overhead stream from a C5-rich bottoms stream;
- a first conversion zone in communication with a bottoms line of said process fractionation column for converting C5-C7 olefins to larger molecular weight C5-C7-derived compounds;
- a second conversion zone in communication with an overhead line of said process fractionation column for converting C4 olefins to larger molecular weight C4-derived compounds;
- a product splitter column in communication with said first conversion zone for separating C5-C7-derived compounds from unreacted compounds;
- and
- an FCC reactor in communication with a bottoms line of said product splitter column.
3 more elements
An apparatus for converting FCC olefins to larger compounds comprising:
- a fluid catalytic cracking reactor for contacting cracking catalyst with a hydrocarbon feed stream to crack hydrocarbons to cracked product hydrocarbons having lower molecular weight and deposit coke on the cracking catalyst to provide coked cracking catalyst;
- a catalyst regenerator for combusting coke on said coked cracking catalyst with oxygen to regenerate said cracking catalyst;
- a main fractionation column in communication with said fluid catalytic cracking reactor for separating said cracked products;
- a compressor in communication with an overhead line of said main fractionation column for compressing at least a portion of an overhead stream from said main fractionation column;
- a receiver in communication with said compressor for separating a liquid stream from said compressed overhead stream;
- a process fractionation column in communication with said receiver for depropanizing at least a portion of said liquid stream;
- a conversion zone in communication with said process fractionation column for converting the C4-C7 olefins to larger molecular weight C4-C7-derived compounds.
4 more elements
Dependencies are inferred from the claim text.