Arkema France

Total Raffinage Marketing

Ifp Energies Nouvelles

Cj Cheiljedang Corporation

Total Sa

Total Raffinage France

Akema France

Georges Fremy

Jean-Pierre Dath

So Young Kim

So-Young Kim

Rosangela Pirri

Patrice Barre

Francis Humblot

Arnaud Masselin

Jean-Michel Raymond

Claude Brun

Thierry Cholley

Paul-Guillaume Schmitt

Carole Lamonier

Pascal Blanchard

Eric Lamant

Hugo Brasselet

Karine Sanchou

Pascal Saint-Louis-Augustin

Alexia Cordova

Jean Ollivier

Dominique Plee

Sang Mok Lee

Sung Kwang Son

Nadine Essayem

Bernard Monguillon

Didier Anglerot

Jean-Louis Peytavy

Paul Guillaume Schmitt

Michel Lacroix

Jean-Benoit Cazaux

Christian Forquy

Jean-Benoît Cazaux

Andre Lozowski

Serge Capdeville

Elodie Zausa

Helori Salembier

Louis Corbel

Carole Dupuy

Mélanie Hebert

Pascal Saint Louis Augustin

The invention relates to a process for the co-production of methyl mercaptan and of dimethyl disulfide, comprising the following successive steps:

Process for the co-production of methyl mercaptan and of dimethyl disulfide from carbon oxides

Provided is a process for preparing polythiols by preparing a sulfhydration reaction medium, simultaneously carrying out radical sulfhydration reaction of at least one polyene and acid-catalyzed sulfhydration reaction of the polyene and recovering a mixture including at least two polythiols. Also provided is a mixture of polythiols obtained from the process described herein.

Method for preparing polythiols

The invention relates to a process for the co-production of alkyl mercaptan and of dialkyl disulfide, comprising the following successive steps:

Process for the co-production of alkyl mercaptan and dialkyl disulfide from alcohol

Provided is a process for synthesizing a functionalized cyclic dithiocarbamate.

Functionalised cyclic dithiocarbamate synthesis method

Provided is process for the synthesis of at least one functionalized organic polysulfide.

Functionalised polysulphide synthesis method

Provided is an enzymatic process for preparing mercaptans from disulfides.

Method for producing mercaptans by disulfide enzyme hydrogenolysis

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (HS) and optionally sulphur (S) such as to form carbon disulphide (CS) and hydrogen (H); b) reacting said carbon disulphide (CS) by hydrogenation in the presence of said hydrogen (H) obtained in step a) such as to form methyl mercaptan (CHSH), hydrogen sulphide (HS) and possibly hydrogen (H); c) optionally recirculating said hydrogen sulphide (HS) formed during step b) to step a); and d) recovering the methyl mercaptan.

Method for preparing methyl mercaptan

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (HS) and optionally sulphur (S) such as to form carbon disulphide (CS) and hydrogen (H); b) reacting said carbon disulphide (CS) by hydrogenation in the presence of said hydrogen (H) obtained in step a) such as to form methyl mercaptan (CHSH), hydrogen sulphide (HS) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (HS) formed during step b) to step a); and d) recovering the methyl mercaptan.

Provided is an enzymatic process for the preparation of a mercaptan of formula R&#x2014;SH from disulfides utilizing hydrogen.

Method for producing mercaptans by hydrogen-assisted disulfide enzyme hydrogenolysis

Provided is a process for the preparation of L-methionine in an enzymatic reaction utilizing dimethyl disulfide (DMDS) a precursor of L-methionine, and an organic reducing compound. In the process, methyl mercaptan can be formed by the enzymatic hydrogenolysis of the DMDS.

Method for producing L-methionine

Provided is an enzymatic process for preparing L-methionine from diethyl disulfide.

The present invention relates to a method for preparing dimethyl disulphide, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (HS) and optionally sulphur (S) such as to form carbon disulphide (CS) and hydrogen (H); b) reacting said carbon disulphide (CS) by hydrogenation in the presence of said hydrogen (H) obtained in step a), such as to form methyl mercaptan (CHSH), hydrogen sulphide (HS) and optionally hydrogen (H); c) optionally, but preferably, recirculating said hydrogen sulphide (HS) formed in step b) to step a); d) reacting the methyl mercaptan formed in step b) with sulphur such as to form dimethyl disulphide and hydrogen sulphide; e) optionally recirculating the hydrogen sulphide formed during step d) to step a); and f) recovering the dimethyl disulphide.

Method for preparing dimethyl disulphide

The invention relates to a catalyst comprising an active component based on molybdenum and on potassium and a support based on hydroxyapatite, and also to a process for preparing said catalyst and a process for producing methyl mercaptan in a catalytic process by reaction of carbon monoxide, sulphur and/or hydrogen sulphide and hydrogen, comprising the use of said catalyst.

Catalyst for the synthesis of methyl mercaptan and process for producing methyl mercaptan from synthesis gas and hydrogen sulphide

The invention relates to a hydrocarbon hydroprocessing catalyst comprising a support based on at least one refractory oxide, at least one metal from group VIII and at least one metal from group VIB. The inventive catalyst is characterized in that it also comprises at least one organic compound having formula (I) or (II): in which each Rrepresents independently an alkyl group at C, an alkenyl group at C, an aryl group at C, a cycloalkyl group at C, an alkylaryl or arylalkyl group at C, or the two Rgroups together form a divalent group at C, and Rrepresents an alkylene group at C, an arylene group at C, a cycloalkylene group at C, or a combination of same. The invention also relates to a method of preparing one such catalyst and to the use thereof for hydroprocessing or hydrocracking.

Hydroprocessing catalyst, preparation method thereof and use of same

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Sauveterre de Bearn, France

Georges Fremy