Agence Nationale De Valorisation De La Recherche (Anvar)

Compagnie Francaise De Raffinage

Claude Wakselman

Roben Loutaty

Martial Atlani

Charles Yacono

Marc Tordeux

Vincent Corso

The invention relates to a method for purifying a gas mixture containing at least one undesirable gas compound utilizing certain sulfonamide or sulfamide solvents.

Method of purifying a gas mixture containing undesirable gas compounds

Dienic and/or aromatic hydrocarbons are separated from hydrocarbon fractions employing known liquid-liquid extraction and/or extractive distillation procedures and at least one sulfonamide solvent conforming to the general formula ##STR1## wherein R', R' and 4'' can be linear or branched, saturated or unsaturated, aliphatic groups possessing from 1 to 18 carbon atoms, wherein two or three of groups R', R' and R'' can be identical, wherein one of the groups R' and R'' can be replaced with a hydrogen atom, and wherein at least one of groups R', R' and R'' is unsaturated.

Process for the separation of dienic and/or aromatic hydrocarbons

This invention relates to compounds having the formula ##STR1## in which R.sub.F is a perfluoro radical C.sub.n F.sub.2n+1 with n=1-20, and R is a C.sub.1-20 alkyl radical, a C.sub.4-15 cycloalkyl radical, a C.sub.5-20 cycloalkyl-alkyl radical, or a C.sub.6-20 aromatic radical. Said compounds constitute valuable intermediates for the synthesis of surface-active agents.

Perfluoro intermediates and processes for their preparation

Process for the extraction of diene or aromatic hydrocarbons from petroleum hydrocarbon fractions employing sulfonamides as solvents. Also described are new sulfonamides useful as solvents for the extraction process.

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Villebon, France

Claude Wakselman