Fuel and related compositions – Liquid fuels – Aluminum or heavy metal – other than lead – containing
Patent
1989-12-21
1990-12-04
Chaudhuri, Olik
Fuel and related compositions
Liquid fuels
Aluminum or heavy metal, other than lead, containing
568697, C10L 118, C07C 4106
Patent
active
049750976
ABSTRACT:
A technique for converting olefinic light hydrocarbons to ether-rich liquid fuels and olefinic gasoline including etherification, olefin upgrading and transhydrogenation operations. The preferred process includes: reacting a fresh hydrocarbon stream containing C.sub.4 + iso-alkene with lower aliphatic alcohol in an etherification zone in contact with an acidic etherification catalyst under etherification conditions whereby an effluent stream containing C5+ tertiary-alkyl ether is produced; separating the etherification effluent stream to provide a first liquid stream comprising C5+ ether and a second stream comprising unreacted alcohol and C4+ hydrocarbons; contacting the second stream with acidic metallosilicate catalyst for conversion of oxygenates and olefins under olefin oligomerization and isomerization conditions at elevated temperature; separating oligomerization effluent to recover an intermediate hydrocarbon stream rich in C.sub.4 + paraffinic hydrocarbon, a light gas stream, and a liquid product stream comprising C.sub.6 + olefinic gasoline; contacting the C.sub.4 + intermediate hydrocarbon stream with lower alkene in the presence of transhydrogenation catalyst whereby C.sub.4 + paraffin is converted to C4+ olefin, including iso-alkene; separating transhydrogenation effluent to recover C4+ olefin containing iso-alkene; and passing at least a portion of iso-alkene to the etherification zone for co-conversion with fresh hydrocarbon and alcohol to produce tertiary-alkyl ether.
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Harandi Mohsen N.
Owen Hartley
Chaudhuri Olik
McAvoy E.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
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