1
Jean-luc Dubois
Sylvain Gerard, Nicolas Dupont, Jean Luc Dubois, Serge Tretjak, Nabil Tlili: Method and device for separating gaseous mixtures by means of permeation. Arkema France, L Air Liquide Societe Anonyme Pour L Etude Et L Exploitation Des Procedes Georges Claude, August 23, 2012: US20120210870-A1

The invention relates to a method for purifying a specific gas stream containing one or more components to be recovered, one or more impurities to be eliminated and one or more poisons, for a unit for separation by means of permeation, including the following steps: a) in a unit for separation by me ...


2
Jean-luc Dubois
Christophe Claeys, Alberto Garcia, Sylvain Gerard, Nicolas Dupont, Jean Luc Dubois, Serge Tretjak, Nabil Tlili: Method and device for producing alkene derivatives. Arkema France, L Air Liquide Societe Anonyme Puor L Exploitation des Procedes Georges Claude, November 1, 2012: US20120277464-A1

The invention relates to a method for producing a flow containing at least one alkene derivative, including the following steps: a step a) of reacting a flow containing one or more alkenes and one or more alkanes—the ratio of said alkanes to said alkenes being at least 1 by volume—with a flow contai ...


3
Serge Tretjak: Removal of nitrous oxide from gaseous effluents comprised thereof. Grande Paroisse, Burns Doane Swecker & Mathis L, December 10, 1996: US05582810 (7 worldwide citation)

The N.sub.2 O values in gaseous effluents, notably those produced in various organic syntheses entailing nitric acid oxidation (for example the industrial scale production of adipic acid, of glyoxal and of glyoxylic acid), are catalytically decomposed at elevated temperatures over H-mordenite and am ...


4
Thierry Druzkowski, Gilles Herbst, Serge Tretjak, Alain Riondel: Process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts. Atofina, Millen White Zelano & Branigan P C, January 27, 2004: US06683203 (2 worldwide citation)

This process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the formula (I), by reaction, in the presence of water, of N,N-dimethylaminoethyl acrylate (DAMEA) with a quaternizing agent of formula (II), is characterized in that the said reactio ...


5
Jean Michel Paul, Serge Tretjak: Method for preparing (meth)acrylic anhydride. Arkema France, Kimberly R Hild, January 17, 2012: US08097757 (1 worldwide citation)

The present invention relates to an improved method for preparing (meth)acrylic anhydride (A(M)A2O) by transanhydrification between (meth)acrylic acid and acetic anhydride in the presence of at least one polymerization inhibitor, in which reaction to the point of partial conversion of the reagents i ...


6
Serge Tretjak: Process for removing n2o in gaseous effluents from nitric oxidations.. Paroisse Grande, November 18, 1994: FR2705036-A1

Process for removing nitrogen monoxide present in gaseous effluents originating from organic synthesis plants making use of oxidation reactions using nitric acid, by catalytic destruction at high temperature on catalysts based on H-mordenites or ammonium mordenites, preferably iron-, cobalt- or bism ...


7
Serge Tretjak, Stephane Denis: Liquid-liquid extraction process for the production of acrylic esters. Arkema France, Lynn B Morreale, August 2, 2016: US09403751

The invention relates to a liquid-liquid extraction process, comprising: the provision of a main input liquid stream, comprising at least one compound of interest and an excess compound; the provision of a liquid scrubbing stream; the extraction of the excess compound from the main input liquid stre ...


8
Alain Riondel, Gilles Herbst, Serge Tretjak: Method for making aqueous solutions of (meth)acryloyloxyethylbenzyldimethylammonium chlorides. Arkema, Millen White Zelano & Branigan P C, August 1, 2006: US07084296

This process for the manufacture of an aqueous solution of (meth)acryloyloxyethylbenzyl-dimethylammonium chloride ((M)ADAMQUAT BZ) by reaction, in the presence of water, of N,N-dimethylaminoethyl (meth)acrylate ((M)ADAME) with benzyl chloride is characterized in that the reaction is carried out cont ...


9
Roland Bachelard, Annick Faure, Serge Tretjak: Process for preparation of porous components made of ceramic including monocrystalline platelets of alpha alumina. Elf Atochem, FAN MINGE, February 26, 1997: CN96107642

Disclosed is a process for the preparation of porous ceramic parts which comprises single crystal alpha alumina platelets, the method is characterized in that: (a) shaping a compsn. contg. single crystal alpha alumina platelets, organic additive(s) and opt. mineral additive, (b) opt. heating the res ...


10
Alain Riondel, Gilles Herbst, Serge Tretjak: Method for making aqueous solutions of (meth)acryloyloxyethylbenzyldimethylammonium chlorides. Millen White Zelano & Branigan PC, February 5, 2004: US20040024242-A1

This process for the manufacture of an aqueous solution of (meth)acryloyloxyethylbenzyl-dimethylammonium chloride ((M)ADAMQUAT BZ) by reaction, in the presence of water, of N,N-dimethylaminoethyl (meth)acrylate ((M)ADAME) with benzyl chloride is characterized in that the reaction is carried out cont ...