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US 2010/0247391 A1Published application
Apparatus for Oligomerizing Dilute Ethylene
AssigneeUop LLC
InventorsChristopher P. Nicholas, Alakananda Bhattacharyya, David E. Mackowiak
Life of this patent
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Abstract
The process and apparatus converts ethylene in a dilute ethylene stream that may be derived from an FCC product to heavier hydrocarbons. The catalyst may be an amorphous silica-alumina base with a Group VIII and/or VIB metal. The catalyst is resistant to feed impurities such as hydrogen sulfide, carbon oxides, hydrogen and ammonia. At least 40 wt-% of the ethylene in the dilute ethylene stream can be converted to heavier hydrocarbons.
Claims20
An apparatus comprising:
- a fluid catalytic cracking reactor for contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbon feed to cracked products having lower molecular weight and deposit coke on the cracking catalyst to provide coked cracking catalyst;
- a product outlet for discharging said cracked products from said reactor;
- a regenerator for combusting coke from said coked cracking catalyst by contact with oxygen;
- a product recovery section in communication with said product outlet, said product recovery section for separating said cracked products into a plurality of product streams including an ethylene containing stream;
- a compressor in communication with said product recovery section for compressing said ethylene containing stream;
- and
- a fixed bed oligomerization reactor in communication with said compressor for oligomerizing ethylene in said ethylene containing stream to heavier hydrocarbons.
4 more elements
An apparatus comprising:
- a fluid catalytic cracking reactor for contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbon feed to cracked products having lower molecular weight and deposit coke on the cracking catalyst to provide coked cracking catalyst;
- a product outlet for discharging said cracked products from said reactor;
- a regenerator for combusting coke from said coked cracking catalyst by contact with oxygen;
- a product recovery section in communication with said product outlet, said product recovery section for separating said cracked products into a plurality of product streams including an ethylene containing stream and said product recovery section including a main column;
- an oligomerization reactor in communication with said main column for oligomerizing ethylene in said ethylene containing stream to heavier hydrocarbons;
- and
- a recycle line in communication with said oligomerization reactor, said recycle line in communication with said main column.
4 more elements
An apparatus comprising:
- a fluid catalytic cracking reactor for contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbon feed to cracked products having lower molecular weight and deposit coke on the cracking catalyst to provide coked cracking catalyst;
- a product outlet for discharging said cracked products from said reactor;
- a regenerator for combusting coke from said coked cracking catalyst by contact with oxygen;
- a product recovery section in communication with said product outlet, said product recovery section for separating said cracked products into a plurality of product streams including an ethylene containing stream;
- a receiver in communication with said product outlet for providing an overhead stream comprising said ethylene containing stream;
- a primary absorber in communication with said receiver for providing a primary off-gas stream comprising said ethylene containing stream;
- a secondary absorber in communication with said primary absorber for providing a secondary off-gas stream comprising said ethylene containing stream;
- and
- an oligomerization reactor in communication with said secondary absorber for oligomerizing ethylene in said ethylene containing stream to heavier hydrocarbons.
6 more elements
Dependencies are inferred from the claim text.