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Dubois Jean Luc, Duquenne Christophe, Hölderich Wolfgang, Kervennal Jacques: Process for dehydrating glycerol to acrolein. Arkema France, Dubois Jean Luc, Duquenne Christophe, Hölderich Wolfgang, Kervennal Jacques, BONNEL Claudine, August 24, 2006: WO/2006/087084 (14 worldwide citation)

The present invention relates to a process for manufacturing acrolein by gas-phase dehydration of glycerol in the presence of strongly acidic solid catalysts with a Hammett acidity H0 of between -9 and -18 and preferably between -10 and -16.


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Devic Michel, Kervennal Jacques, Schirmann Jean Pierre: Process for bleaching pulps.. Atochem Elf, October 5, 1988: EP0285530-A1 (7 worldwide citation)

Bleaching of pulps of mechanical origin in which the pulp is treated with a metal-complexing or sequestering agent and is then washed with an efficiency higher than 95 % before being subjected to the action of hydrogen peroxide at a temperature above 100 DEG C and not exceeding 250 DEG C at the pres ...


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Dubois Jean Luc, Duquenne Christophe, Holderich Wolfgang, Kervennal Jacques: Preparation of an acrolein comprises dehydration of glycerol in gas phase, in the presence of a solid, strong acid catalyst. Arkema, August 18, 2006: FR2882053-A1 (5 worldwide citation)

Preparation of an acrolein comprises dehydration of glycerol in gas phase, in the presence of a solid, strong acid catalyst having Hammett acidity Ho of -9 to -18.


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Cognion Jean Marie, Kervennal Jacques: Catalysts containing silver for the preparation of ethylene oxide.. Ugine Kuhlmann, November 14, 1979: EP0005388-A1 (5 worldwide citation)

1. Catalysts for the synthesis of ethylene oxide by oxidation of ethylene, in the vapour phase by means of oxygen or a gaseous mixture containing oxygen, said catalysts being prepared by the impregnation of refractory supports with organometallic silver compounds and thermal treatment of the product ...


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Couturier Jean Luc, Kervennal Jacques, Goffinet Pierre Charles, Lion Claude: Composition et procede pour la destruction de polluants organophosphores et/ou organosoufres (FR), Composition and process for the destruction of organophosphorus and/or organosulphur pollutants (EN). Arkema France, Couturier Jean Luc, Kervennal Jacques, Goffinet Pierre Charles, Lion Claude, Sauvageot Olivier, November 26, 2009: WO/2009/141548 (4 worldwide citation)

The invention relates to a decontaminating composition comprising: (i) perpropionic acid, (ii) dipicolinic acid, (iii) a salt of hydroxyethyldiethylphosphonic acid, (iv) a surface-active agent, and (v) an alkalinizing agent. The decontaminating compositions that are the subject of the invention have ...


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Kervennal Jacques, Commandeur Raymond, Huet Jean Marie: Halogenated aromatic diamines, process for their preparation and their use in the preparation of polyurethanes.. Atochem, September 14, 1983: EP0088667-A1 (3 worldwide citation)

1. Mixture of isomers of halogenated aromatic diamines of formula : see diagramm : EP0088667,P8,F1 where X denotes a chlorine or bromine atom with : w = 1 or 2 x = 0 to 2 y = 1 or 2.


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Braunstein Pierre, Kervennal Jacques, Richert Jean Luc, Ries Michel: Palladium-iron mixed clusters used as catalyst and method for their production.. Atochem, July 31, 1985: EP0150137-A2 (3 worldwide citation)

Cluster hétéropolymétallique de formule Pd2 (Fe)x (CO)4 [CO(NO)2]y (dppm)2 avec x = 2 quand y = 1 et x = 1 quand y = 0, dppm désignant le ligand bis(diphénylphosphino)méthane. Ces clusters utilisables comme catalyseurs sont obtenus par réaction de Pd2Cl2 (dppm)2 sur un composé MFe(CO)3 X dans lequel ...


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Kervennal Jacques, Cognion Jean Marie, Durual Pierre: Process for the preparation of 2-benzoxazolone and its derivatives from orthonitro phenols and carbon monoxide.. Atochem, August 31, 1983: EP0087347-A1 (3 worldwide citation)

Procédé de préparation de benzoxazolone-2 et dérivés par réaction, en phase liquide, à une température de 100 à 500 DEG C et une pression de 20 à 500 bars, d'un orthonitrophénol de formule : dans laquelle R représente un atome d'hydrogène ou d'halogène, un groupe alkyle contenant de 1 à 10 atomes de ...


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Kervennal Jacques, Cognion Jean Marie: Process for the production of polyurethanes by carbonylation of nitrated hydroxy-aromatic derivatives.. Atochem, November 23, 1983: EP0094861-A1 (3 worldwide citation)

Procédé de fabrication de polyuréthannes par réaction directe caractérisé en ce qu'on fait réagir en présence d'un catalyseur du monoxyde de carbone sur un dérivé hydroxy-aromatique nitré de formule: HO - Ar - NO2 Ar représentant le radical aromatique les fonctions nitrée et hydroxylée étant en posi ...