Elf France

Institut Francais Du Pe'trole

Societe Anonyme Elf France

Michel Llinares

Bernard Torck

Jerome Weill

Pierre Amigues

Henri Grangette

Claude Gueguen

Alain Faure

Christian Bernasconi

Bernard Michel Bossand

Robert Nouguier

Henri Bourgognon

Process for inhibition of microorganisms in liquid hydrocarbons by the introduction of one or more biocidal agents into these hydrocarbons, which also include a small quantity of water and a surface-active compound. This treatment is particularly useful for preserving liquid hydrocarbons such as petrol, kerosene, gasoline or domestic fuel while being stored.

Protection of hydrocarbons against the action of microorganisms

The invention concerns a process for upgrading olefinic gasolines containing C.sub.5 hydrocarbons, but free of C.sub.4 hydrocarbons, by etherification. It is characterized in that the tertiary olefins of the charge are reacted (1 and 2) with methanol; the reaction effluent being then extracted (3) with water, in order to separate an aqueous phase containing the major part of the unreacted methanol from a hydrocarbon phase containing the major part of the formed ethers. The aqueous phase is then introduced in a distillation zone (4) where water is separated from methanol and recycled to the extraction zone (3), whereas methanol is recycled to the etherification zone (1 and 2).

Process for upgrading olefinic gasolines by etherification

The present invention concerns a process for the formation of homogeneous fuel compositions containing a petroleum cut and at least one short chain aliphatic alcohol, essentially methanol, ethanol and the butanols, through dilution with an additive constituted by a C.sub.6 to C.sub.24 glycerol monoether.

Process for the formation of homogeneous fuel compositions containing a

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Saint Genis Laval, France

Michel Llinares