Hydrogenation and etherification of an unsaturated C.sub.5 hydrocarbon cut to increase its octane number and decrease its mono-olefin content
AssigneeInstitut Francais du Petrole
InventorsMichel Derrien, Jean Cosyns, Bernard Torck
Life of this patent
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Abstract
An unsaturated C.sub.5 fraction comprising at least 10% of a mixture (A) of 2-methyl-1-butene with 2-methyl-2-butene and optionally isoprene and at least 10% of a mixture (B) of other mono-olefins and diolefins is hydrogenated under controlled conditions and thereafter etherified with an alcohol having from 1 to 4 carbon atoms. A gasoline fraction of high motor octane number and low olefin content is thus obtained.
Claims17
A process for producing a gasoline fraction of high motor octane number and low olefins content from a C.sub.5 unsaturated fraction comprising at least 10% by weight of a mixture (A) comprising 2-methyl-1-butene and 2-methyl-2-butene;
- and at least 10% by weight of a mixture (B) comprising the C.sub.5 monoolefins other than those of mixture (A), comprising the steps of:
- catalytically hydrogenating the C.sub.5 unsaturated fraction in such a manner as to convert at least 30% of mixture (B) to saturated hydrocarbons while limiting the conversion of mixture (A) to saturated hydrocarbons to at most 10%;
- and
- etherifying at least a portion of the 2-methyl-1-butene and 2-methyl-2-butene in the resultant effluent with an aliphatic C.sub.1-4 alcohol.
Dependencies are inferred from the claim text.