Institut Francais Du Pe'trole

Michel Derrien

Jean Cosyns

Jean-Paul Boitiaux

Bernard Torck

Alain Methivier

Michel Chau

The process of the invention is a process for selective hydrogenation of a hydrocarbon feed containing hydrogen and C hydrocarbons, characterized in that it comprises at least one step for separating a fraction of the hydrogen contained in the feed by means of a membrane (step a)) and a step for selective hydrogenation of the effluent from step a) in a reactive column (step b)).

Selective hydrogenation process comprising partial separation of hydrogen by a membrane upstream of a reactive column

This process for hydrogenating an olefin contained in a mixture of said olefin with an ether and optionally with sulfur, comprises reacting hydrogen with said mixture in the presence of a noble metal-containing catalyst, said catalyst containing at least one first noble metal from the palladium, rhodium, iridium and platinum group and at least one second other metal from the gold and platinum group.

Process for hydrogenating olefins in the presence of ethers

Process for producing 2-methyl-2-butene from a charge containing olefins of 5 carbon atoms, including 2-methyl-1-butene and at least one n-pentene, wherein a mixture of said charge with hydrogen and at least one sulfur compound is contacted with a supported catalyst comprising at least one noble metal from group VIII. The 2-methyl-1-butene of the charge is isomerized to 2-methyl-2-butene and the n-pentenes are hydrogenated.

Process for producing 2-methyl-2-butene from a 5 carbon atom olefins cut

A stabilized hydrocarbon fraction comprising toluene, xylene, sulfur and olefinic hydrocarbons is converted to benzene by (a) catalytic hydrodesulfuration, (b) hydrodealkylation and (c) catalytic hydrogenation.

Process for producing benzene by hydrodealkylation of a hydrocarbon

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.

Hydrogenation and etherification of an unsaturated C.sub.5 hydrocarbon

Unsaturated gasolines of both high mercaptan or hydrogen sulfide content and high gum-generator content are hydrogenated first over a palladium catalyst and then over a nickel catalyst. Resultant unsaturated gasolines are sweet and have low gum-generator content.

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Rueil-Malmaison, France

Michel Derrien