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Jean-luc Dubois
Jean Luc Dubois, Christophe Duquenne, Wolfgang Holderich, Jacques Kervennal: Process for dehydrating glycerol to acrolein. Arkema France, Steven D Boyd, February 2, 2010: US07655818 (12 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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Jean-luc Dubois
Jean Luc Dubois, Christophe Duquenne, Wolfang Holderich, Jacques Kervennal: Process for Dehydrating Glycerol to Acrolein. Arkema France, Arkema, Patent Department 26th Floor, September 4, 2008: US20080214880-A1

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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Jean Marie Cognion, Jacques Kervennal: Supports for silver catalysts utilized in the production of ethylene oxide. Produits Chimiques Ugine Kuhlmann, Pennie & Edmonds, December 30, 1980: US04242235 (43 worldwide citation)

Silver catalysts for vapor phase synthesis of ethylene oxide by reacting oxygen or gaseous mixtures containing same with ethylene, characterized by the use as support of a porous material having a specific surface area of less than 10 sq. m/g, a total volume of porosity of between 0.1 and 0.6 cm.sup ...


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Sophie Suc, Jacques Defaye, Andree Gadelle, Jacques Kervennal: Process for oxidising cationic starch and amphoteric cationic carboxylic starch obtained thereby.. Atochem Elf, September 24, 1993: FR2688787-A1 (18 worldwide citation)

This process consists in reacting a cationic starch with hydrogen peroxide and hydrobromic acid or bromine, in aqueous solution, so as to oxidise selectively the hemiacetal groups of the cationic starch and optionally the hemiacetal groups of its products of acidic hydrolysis, to carboxylic groups. ...


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Sophie Suc, Jacques Defaye, Andree Gadelle, Jacques Kervennal: Process for the oxidation of cationic starches and amphoteric starches, containing carboxyl and cationic groups, thus obtained. Elf Atochem, Finnegan Henderson Farabow Garrett & Dunner, January 24, 1995: US05383964 (17 worldwide citation)

This process consists in reacting a cationic starch in aqueous solution with hydrogen peroxide and hydrobromic acid or bromine, so as to oxidize selectively the hemiacetal groups of the cationic starch and, where appropriate, the hemiacetal groups of its products of acid hydrolysis, to give carboxyl ...


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Bernard Dubreux, Jacques Kervennal, Philippe Mulard, Michele Pralus: Directly distilled diesel fuels having improved cetane numbers. Atochem, Burns Doane Swecker & Mathis, May 19, 1992: US05114433 (4 worldwide citation)

The cetane numbers of directly distilled diesel fuels are significantly improved by intimately contacting same with an effective amount of hydrogen peroxide in the presence of a carboxylic acid, or with an effective amount of a percarboxylic acid either in the presence or absence of hydrogen peroxid ...


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Jacques Kervennal, Henri Mathais, Raymond Commandeur: Liquid composition containing diisocyanate of diphenylurethane. Atochem, Sigalos & Levine, March 17, 1987: US04650899 (4 worldwide citation)

A liquid composition comprising a mixture of isomers of essentially diisocyanates having the diphenylmethane structure, the distribution by weight of isomers in the composition for each 100 parts by weight of the composition being:


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Jacques Kervennal, Jean Marie Cognion, Pierre Durual: Process for the preparation of 2-benzoxazolone and derivatives from ortho-nitrophenols and carbon monoxide. Atochem, Beveridge DeGrandi & Kline, June 12, 1984: US04454322 (4 worldwide citation)

Process for the preparation of 2-benzoxazolone and derivatives by the reaction, in the liquid phase, at a temperature from 100.degree. to 500.degree. C. and a pressure from 20 to 500 bars, of an ortho-nitrophenol of the formula: ##STR1## in which R represents a hydrogen or halogen atom, an alkyl gro ...


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Sophie Suc, Jacques Defaye, Andree Gadelle, Jacques Kervennal: Amphoteric starch containing carboxyl and cationic groups. Elf Atochem, Finnegan Henderson Farabow Garrett & Dunner, May 23, 1995: US05417755 (3 worldwide citation)

An amphoteric starch containing carboxyl and cationic groups characterized in that its carboxyl groups originate from the selective oxidation of the hemiacetal groups of the cationic starch and possibly of the hemiacetal groups of its products of acid hydrolysis. The process for producing the amphot ...