Abstract: Process for separating one or more compound(s), including at least one n-paraffin, in a hydrocarbon feedstock, in which: A stream, or a portion of a stream of said feedstock, is passed successively and in any order into at least one distillation column and at least one membrane separation unit comprising a selective membrane with regard to at least one n-paraffin; and One or more stream(s) is (are) recovered from the column and the membrane separation unit, each of said streams being enriched respectively with one of said compounds, and at least one of said streams being enriched with at least one n-paraffin. Installation for the implementation of this process. The invention relates in particular to a process and an installation that allow the fractionation of a petroleum fraction that contains hydrocarbon molecules with close boiling points.

Abstract: In a process for producing fatty acid alkyl esters and glycerol comprising at least one reaction stage in which a charge comprising a vegetable and/or animal oil and an alcohol are brought into contact, in the presence of a heterogeneous catalyst, so as to obtain an effluent comprising at least alkyl esters, glycerol and alcohol, and at least one separation stage during which a separation is carried out of at least one portion of the effluent so as to separate an alcohol-rich effluent and an alkyl esters-rich effluent, at least one separation stage consists of a membrane separation using at least one alcohol-permeable membrane.

Abstract: The invention concerns a process for selective hydrodesulphurization of an olefinic gasoline, in which makeup hydrogen and/or the overall feed at the inlet to the catalytic reactor has a CO content of less than 50 ppmv of even less, but a COx(?CO+½CO2) content of more than 120 ppmv. The invention allows diversification as regards the sources of makeup hydrogen and/or can simplify the purification treatment for said hydrogen, and/or can reduce the purge of hydrogen from the hydrodesulphurization unit.

Abstract: In a process for producing fatty acid alkyl esters and glycerol comprising at least one reaction stage in which a charge comprising a vegetable and/or animal oil and an alcohol are brought into contact, in the presence of a heterogeneous catalyst, so as to obtain an effluent comprising at least alkyl esters, glycerol and alcohol, and at least one separation stage during which a separation is carried out of at least one portion of the effluent so as to separate an alcohol-rich effluent and an alkyl esters-rich effluent, at least one separation stage consists of a membrane separation using at least one alcohol-permeable membrane.

Abstract: Alkyl esters of fatty acids, and high purity glycerin, are produced using a process comprising a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol employing a heterogeneous catalyst, for example based on zinc aluminate, the water content in the reaction medium being controlled to a value that is below a given limiting value.

Abstract: A process for the production of an isomerate with a RON that is at least equal to 80 and that contains less than 1% by weight of aromatic compounds, starting with a fraction consisting mostly of hydrocarbons with 7 carbon atoms, and containing paraffins, naphthenes, and aromatic compounds in any proportion is described. Said process uses at least one isomerization unit, at least one unit for opening naphthene rings, and at least one separation unit; these units are combined in such a way as to recycle, to exhaustion, methyl cyclohexane, toluene, and normal paraffins and monobranched paraffins.

Abstract: Alkyl esters of fatty acids, and high purity glycerin, are produced using a process comprising a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol employing a heterogeneous catalyst, for example based on zinc aluminate, the water content in the reaction medium being controlled to a value that is below a given limiting value.