Rhodia Fiber & Resin Intermediates

R. P. Fiber & Resin Intermediates

Rhone-poulenc Chimie

Rhodia Polyamides Intermediates

Rhodia Polymide Intermediates

Rhodia Feber & Resin Intermedaites

Paolo Burattin

Gilbert Blanchard

Fabrizio Cavani

Ferruccio Trifiro

Stefania Albonetti

Marc Huser

Pierre Coqueret

Jean-Christophe Galland

Alex Chamard

Olivier Guerret

Guy Bertrand

Francois Mathey

Heinz Gornitzka

Philippe Savignac

St&eacute;fano Masetti

Larbi Aouni

Christophe Buron

Lutz Stelzig

Frederic Eymery

The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds comprising at least a nitrile function. The invention provides a method for hydrocyanation of an ethylenically unsaturated hydrocarbon compound by reacting in liquid medium the hydrogen cyanide in the presence of a catalyst comprising a metal element selected among transition metals and an organophosphorous ligand, characterised in that the organophosphorous ligand is a furylphosphine. The invention is in particular useful for synthesizing adiponitrile from butadiene.

Method for making nitrile compounds from ethylenically unsaturated compounds

The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds into compounds comprising at least a nitrile function. More particularly, it concerns a method for hydrocyanation of organic compounds comprising at least a ethylenical bond by reacting hydrogen cyanide, in the presence of a catalytic system comprising a transition metal and an organophosphorus ligand. The organophosphorus ligand is a compound with monophosphanorbornadiene structure. The invention concerns in particular hydrocyanation of butadiene into adiponitrile.

Hydrocyanation method for ethylenically unsaturated organic compounds

Hydrocyanation catalysts comprising aqueous solutions of at least one water-soluble phosphine and nickel values, well suited for the hydrocyanation of ethylenically unsaturated organic compounds such as diolefins, olefinic nitrites and monolefins, are produced by (a) admixing an aqueous solution of such at least one water-soluble phosphine with a nickel hydroxide, (b) adding hydrogen cyanide or a compound which generates hydrogen cyanide to the mixture thus formed, (c) stirring the resulting mixture until the nickel values have at least partially dissolved, and (d) reducing at least a portion of said nickel values having an oxidation state of greater than zero to the zero oxidation state.

Production of hydrocyanation catalysts

Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.

Purified sulfonated organophosphorus compounds and catalysis of organic reactions therewith

The invention concerns novel organometallic complexes comprising cationic heterocyclic carbenes. It also concerns a method for preparing said complexes from dicationic heterocyclic precursor compounds. It further concerns the use as catalysts of said organometallic complexes for a certain number of chemical reactions.

Organometallic complexes comprising cationic heterocyclic carbenes

Ethylenically unsaturated organic compounds, for example diolefins, olefinic nitriles and monoolefins, are noncontaminatingly hydrocyanated into corresponding nitriles by (a) reacting such ethylenically unsaturated organic compounds with hydrogen cyanide in the presence of an aqueous solution containing a catalytically effective amount of a catalyst which comprises at least one nickel compound and at least one water-soluble phosphine, (b) thereafter separating the organic phase from the aqueous phase which result, the separated aqueous phase comprising a solid phase formed during hydrocyanation, and (c) thence treating the separated aqueous phase, or a solid phase removed therefrom, with hydrogen cyanide to thus at least partially dissolve said solid phase contained therein or removed therefrom.

Production of nitriles via hydrocyanation of ethylenically unsaturated organic compounds

Furylphosphines and organometallic complexes containing them

Ammoxidation catalysts for fluidized/moving bed reactors

Method for preparing ammoxidation catalysts

Mixed oxide vanadium/antimony/titanium ammoxidation catalysts, particularly suited for the ammoxidation of alkanes and exhibiting X-ray diffraction spectra which are characteristic of a crystallographic phase of rutile TiO.sub.2, are prepared by (a) dissolving respective soluble compounds of vanadium, of antimony and of titanium in at least one saturated alcohol, (b) contacting the alcoholic solution thus obtained with water and precipitating the mixed oxide therefrom, and (c) separating and calcining the mixed oxide thus precipitated.

Vanadium/antimony/titanium mixed oxide and process of use in vapor phase

Vanadium/antimony/tin mixed oxides having the empirical formula (I):

Mixed V/Sb/Sn oxide ammoxidation catalysts

Preparation of VSb.sub.a aTi.sub.b O.sub.x ammoxidation catalysts

Growing community of inventors

Lyons, France

Paolo Burattin