Abstract: A catalytic composition comprising at least one nickel compound mixed or complexed with at least one tertiary phosphine or a phosphite carrying a functional group, at least partly dissolved in a non-aqueous medium with an ionic nature resulting from bringing at least one aluminum halide into contact with at least one quaternary ammonium halide and/or at least one quaternary phosphonium halide is useful for dimerizing, co-dimerizing and oligomerizing olefins. Functional group include, but are not limited to, an amine, a cyclic amine, a nitrogen-containing heterocycle, an ester, an acid, an alcohol, a quaternary ammonium, a quaternary phosphonium, a sulfonium, a sulfonate or a phosphonate group.

Abstract: A catalytic composition for the dimerization, the codimerization or the oligomerization of olefins results from the dissolution of at least one nickel complex that contains a heterocyclic carbene in a liquid mixture that comprises at least one ammonium halide or quaternary phosphonium halide, at least one aluminum halide and optionally at least one organometallic aluminum compound. It is used in a process of dimerization, codimerization or oligomerization of olefins.

Abstract: A composition defined:

Abstract: An improved catalyst based on cobalt and/or rhodium dissolved in a non-aqueous ionic solvent which is liquid at a temperature of less than 90° C. More particularly, the catalyst comprises at least one complex of cobalt and/or rhodium coordinated with at least one nitrogen-containing ligand and the non-aqueous ionic solvent comprises at least one quaternary ammonium and/or phosphonium cation and at least one inorganic anion.

Abstract: An improved process for regenerating metathesis catalysts that comprise a compound of rhenium, molybdenum or tungsten on a porous substrate that consists of a refractory oxide and that has an acidic, neutral or basic nature, and an organometallic promoter that consists of an alkyl complex of tin or lead is described. The regeneration comprises a selective extraction of the organometallic promoter followed by a calcination and a reimpregnation by the same promoter.

Abstract: In order to carry out selective dimerization of propylene principally into branched dimers, a catalytic composition resulting from at least partly dissolving a nickel compound mixed or complexed with a tertiary phosphine carrying a functional group is used in a medium resulting from mixing at least one quaternary ammonium halide and/or at least one quaternary phosphonium halide, at least one aluminum halide and optionally at least one organometallic aluminum compound.

Abstract: For the selective production of propylene from an olefinic C4 fraction, a process is implemented that successively comprises:

Abstract: A process for production, from an olefinic C4 fraction, on the one hand, of high-purity isobutene and, on the other hand, of propylene by metathesis is described.

Abstract: In an improved process for hydroformylation of olefinically unsaturated compounds using a catalyst based on cobalt and/or rhodium employed in a two-phase medium, a catalyst based on cobalt and/or rhodium is used dissolved in a non-aqueous ionic solvent which is liquid at a temperature of less than 90° C., in which the aldehydes formed are slightly soluble or insoluble. More particularly, the catalyst comprises at least one complex of cobalt and/or rhodium co-ordinated with at least one nitrogen-containing ligand and the non-aqueous ionic solvent comprises at least one quaternary ammonium and/or phosphonium cation and at least one inorganic anion. At the end of the reaction, the organic phase is generally separated and the ionic non-aqueous solvent phase containing the catalyst can be re-used.

Abstract: The present invention provides a catalyst and a process for metathesis of olefinic C4 cuts. The catalyst contains rhenium, caesium and delta alumina. The preferred catalyst contains at least one rhenium compound deposited on a support principally composed of alumina, treated at a temperature of more than 750° C., and modified by at least one caesium compound. Thus the duration of the cycle between two regeneration operations is substantially increased. Application to a process for the production of propylene from an olefinic C4 cut in three steps: selective hydrogenation of butadiene with isomerisation of 1-butene to 2-butene, separation by distillation of the major portion of the isobutene, and metathesis of the cut rich in 2-butene with ethylene.

Abstract: A nickel catalytic system that makes it possible to obtain branched compounds from fatty substances by reacting simple olefins on polyunsaturated esters, which may or may not be conjugated, is described. The compounds that are obtained may be hydrogenated and used as lubricant bases or may be transformed according to known procedures into compounds of acid, alcohol, amine or amide type, used in varied applications.

Abstract: A process for oligomerising olefins in an organic feed containing at least one olefin comprises two steps with different types of catalysis. The cut to be treated containing at least one olefin (Cn) is introduced via line 1 into a reaction zone R1 where in a first step it undergoes catalytic oligomerisation, either of a liquid phase homogeneous type, or heterogeneous with a solid support. The effluent produced is sent via line 2 to a heat exchanger E1 traversed by a cold liquid. The effluent is thus cooled before being sent via line 3 to a second reaction zone R2 where it undergoes catalytic oligomerisation in a liquid-liquid two-phase medium. After reaction, the effluent is fed via line 4 to a zone L1 where it is washed. After washing, the hydrocarbon fraction is sent via line 5 to separator S1.

Abstract: Catalytic process for metathesis of olefins in the presence of a catalyst and a stabilizing agent that is injected into the reaction medium. Application in particular to rebalancing between one another the light olefins that are obtained from steam cracking or catalytic cracking (FCC), such as ethylene, propylene, butenes or pentenes.

Abstract: Catalytic process for metathesis of olefins in the presence of a catalyst and a stabilizing agent that is injected into the reaction medium. Application in particular to rebalancing between one another the light olefins that are obtained from steam cracking or catalytic cracking (FCC), such as ethylene, propylene, butenes or pentenes.

Abstract: A process for the hydroformylation of an olefinically unsaturated compound in the liquid phase by reaction, in a reaction section, with carbon monoxide and hydrogen in the presence of a polar phase comprising:

Abstract: In a process for hydroformylation of olefinically unsaturated compounds using a catalyst based on cobalt and/or rhodium co-ordinated by at least one ligand selected from the group formed by nitrogen-containing or phosphorus-containing ligands used in a non-aqueous ionic solvent, which catalyst is liquid at a temperature of less than 90° C., in which the aldehydes formed are not or are only slightly soluble and which comprises at least one quaternary ammonium and/or phosphonium cation Q+ and at least one anion A−, the improvement of the invention consists in that in the cobalt and/or rhodium complex, the ligand also carries an ionic function (Q′)+(A′)− where Q and Q′ and/or A and A′ are chemically identical.

Abstract: A process is described for carrying out olefin oligomerisation in two catalysis steps of different types, using an organic feed containing at least one olefin. The cut to be treated, containing at least one olefin (Cn), is introduced into a first reaction zone where, in a first step, it undergoes catalytic oligomerisation either of the homogeneous liquid phase type, or of the heterogeneous type with a solid support. The effluent produced is generally sent to a heat exchanger traversed by a cold liquid, the effluent thus being cooled before being sent to a second reaction zone where it undergoes catalytic oligomerisation in a liquid-liquid two-phase medium, the invention being characterized in that at least an ethylenic hydrocarbon containing 3 to 5 carbon atoms per molecule is added to the inlet to the second reaction zone.

Abstract: In a process for hydroformylation of olefinically unsaturated compounds using a catalyst based on cobalt and/or rhodium coordinated by at least one ligand selected from the group formed by nitrogen-containing or phosphorus-containing ligands used in a non-aqueous ionic solvent, which catalyst is liquid at a temperature of less than 90° C., in which the aldehydes formed are not or are only slightly soluble and which comprises at least one quaternary ammonium and/or phosphonium cation Q+ and at least one anion A−, the improvement of the invention consists in that in the cobalt and/or rhodium complex, the ligand also carries an ionic function (Q′)+(A′)− where Q and Q′ and/or A and A′ are chemically identical.

Abstract: A facility for converting an olefinic C4 cut to isobutene and propylene comprising, in succession: 1) a zone 1 for selective hydrogenation of olefins in the olefinic C4 cut with simultaneous isomerisation of butene-1 to butene-2, said zone comprising at least one device for introducing the olefinic C4 cut to be converted, at least one device for removing an effluent, and at least one device for introducing hydrogen, said zone also comprising at least one catalyst bed; 2) a separation zone, comprising at least one device for introducing the effluent from zone 1 directly connected to said at least one device for removing an effluent, at least one device for removing a first fraction comprising isobutene and butene-1, and at least one device for removing a second fraction comprising butene-2 and n-butane, wherein the second fraction comprises at most 1% by weight of isobutene and at most 1% by weight of butene-1; 3) a metathesis zone for metathesis of butene-2 with ethylene to produce propylene, wherein the m

Abstract: A catalytic composition for the dimerization, the codimerization or the oligomerization of olefins results from the dissolution of at least one nickel complex that contains a heterocyclic carbene in a liquid mixture that comprises at least one ammonium halide or quaternary phosphonium halide, at least one aluminum halide and optionally at least one organometallic aluminum compound. It is used in a process of dimerization, codimerization or oligomerization of olefins.