Class 568/70 - Preparing by reacting hydrogen sulfide or a metal hydrosulfide

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein the compound is prepared by reacting hydrogen
No. of patents: 29
Last issue date: 08/18/2009

Number	Title	Issue Date
7576243	Process for preparing methyl mercaptan from dialkyl sulphides and dialkyl polysulphides A process for continuously preparing methyl mercaptan by reacting a reactant mixture which contains a dialkyl sulphide and a dialkyl polysulphide with hydrogen sulphide to give methyl mercaptan. ...	08/18/2009
7569731	Process for the manufacture of methylmercaptan The present invention refers to a continuous process for the manufacture of methyl mercaptan using Mo—O—K-based catalysts. It is further described that the total selectivity of methylmercaptan can be increased by at least 1% by lowering the total gas hourly spac...	08/04/2009
7365233	Methyl mercaptan process A process is provide for the production of methyl mercaptan from synthesis gas and hydrogen sulfide. The process comprises the reaction of carbon monoxide with hydrogen and hydrogen sulfide to produce methyl mercaptan and carbon dioxide. The reaction is carried out ...	04/29/2008
7339083	Catalytic method of producing alkyl mercaptans by adding hydrogen sulphide to an olefin The process for preparing a mercaptan from an olefin and hydrogen sulphide is carried out in the presence of hydrogen and a catalyst composition comprising a strong acid, such as a heteropolyacid, and at least one metal belonging to group VIII of the Periodic Table....	03/04/2008
7169953	P-chiral phospholanes and phosphocyclic compounds and their use in asymmetric catalytic reactions Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic al...	01/30/2007
7105702	P-chiral phospholanes and phosphocyclic compounds and their use in asymmetric catalytic reactions Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic al...	09/12/2006
6995288	Apparatus and method for production of methanethiol A method for the production of methyl mercaptan is provided. The method comprises providing raw feed gases consisting of methane and hydrogen sulfide, introducing the raw feed gases into a non-thermal pulsed plasma corona reactor, and reacting the raw feed gases wit...	02/07/2006
6084135	Production of formaldehyde using carbon oxides, hydrogen and H₂ S A method wherein a gas stream containing hydrogen, a carbon oxide and hydrogen sulfide is first passed in contact with a catalyst comprising a porous alumina supported sulfided metal selected from the group consisting of molybdenum (Mo), chromium (Cr), tu...	07/04/2000
6028228	Production of formaldehyde from CH₄ and H₂ S A method wherein a sour natural gas stream can be treated to produce formaldehyde from methane and methyl mercaptans, (primarily methanethiol (CH3 SH) and a small amount of dimethyl sulfide (CH3 SCH3)) from hydrogen sulfid...	02/22/2000
5977011	Catalyst, process for its preparation, and use for synthesis of methyl mercaptan A catalyst for the synthesis of methyl mercaptan from hydrogen sulfide and methanol as well as a process for preparation of the catalyst. The catalyst is an active aluminum oxide onto which 5 to 25% by weight potassium tungstate is deposited as an activat...	11/02/1999
5493058	Synthesis of methyl mercaptan from dimethyl disulphide The invention relates to the manufacture of methyl mercaptan by catalytic hydrogenation of dimethyl disulphide on a catalyst based on sulphide(s) of at least one transition metal. The selectivity with respect to methyl mercaptan is considerably improved b...	02/20/1996
5481042	Processes producing methyl mercaptan Described are preferred processes which produce methyl mercaptan from methyl bromide and aqueous mediums of metal hydrosulfide. The processes can be used to simultaneously consume methyl bromide byproduct and aqueous NaSH byproduct while producing methyl ...	01/02/1996
5453543	Process for the manufacture of high purity linear C₄ + alkyl mercaptans Linear C4 + alkyl mercaptans of high purity are prepared by the reaction of a di-linear(C4 +) alkyl sulfide with hydrogen sulfide at elevated temperature in the presence of a specified transition alumina material....	09/26/1995
5283369	Selective synthesis of mercaptans and catalyst therefor A process for producing a novel catalyst wherein an amorphous alumina gel is formed at least on the surface of an aluminum-containing material, the gel is heated to form crystalline ଱- or ଲ-alumina trihydrate and the trihydrate is sulfided, th...	02/01/1994
5045302	Ligands and cationic complexes thereof with technetium-99m This invention concerns novel bidentate ligands L having two phosphorus or arsenic atoms. Cationic complexes of the ligands with Technetium-99m, e.g. having the formula [TcO2 L2 ]+, are useful for body imaging, particularl...	09/03/1991
4943662	Process for preparation of dithiols The invention relates to the synthesis of dithiols and more particularly that of ଱,ω-dithiols having 5 to 20 carbon atoms. The process according to the invention comprises reacting a di-(tertiary-alkylthio)alkane with hydrogen sulphide in the presence o...	07/24/1990
4927972	Catalytic process for the production of mercaptans from thioethers A catalytic process for the production of mercaptans from thioethers, which comprises reacting a thioether, in which the sulfur atom of the thioether function is bonded, on the one hand to a tertiary carbon atom and, on the other hand, to a primary or sec...	05/22/1990
4668825	Production of methanethiol from H₂ S and CO Methanethiol is produced from a gaseous feed comprising a mixture of H2 S and CO by contacting said feed with a catalyst comprising rutile titania at a temperature of at least about 225° C....	05/26/1987
4665242	Process for the production of methyl mercaptan from oxides of carbon In a process for the production of methyl mercaptan by heating a gas comprising carbon monoxide and/or carbon dioxide, hydrogen sulphide and hydrogen in contact with a catalyst based upon a heavy metal sulphide, with recycling of the gas fraction which ha...	05/12/1987
4618723	Reduction of carbon oxides with hydrogen sulfide Carbon monoxide and carbon dioxide are upgraded to valuable organic compounds, such as methanol, methane, propylene, and the like, by a thermochemical process comprising: (a) contacting the carbon monoxide and/or carbon dioxide with hydrogen sulfide to fo...	10/21/1986
4570020	Production of methanethiol from H₂ S and CO Methanethiol is produced from a gaseous feed comprising a mixture of H2 S and CO by contacting said feed, at a temperature of at least about 225° C., with a catalyst comprising an oxide of a metal selected from the group consisting of V, Nb, a...	02/11/1986
4449006	Preparation of methyl mercaptan from carbon oxides A process is provided for the manufacture of methyl mercaptan with substantial reduction of by-product methane by intimate mixture of carbon oxide, sulfur or hydrogen sulfide and hydrogen at elevated temperature and pressure with a single-phase, solid cat...	05/15/1984
4410731	Process for the manufacture of methyl mercaptan from carbon oxides A process is provided for the manufacture of methyl mercaptan by reacting a carbon oxide, hydrogen sulfide and hydrogen in the presence of a catalyst at elevated temperature and pressure; the catalyst is a single-phase, solid material comprising a porous ...	10/18/1983
4396778	Process for converting dialkyl sulfides to alkyl mercaptans A continuous process is provided for the vapor-phase preparation of C1 -C18 alkyl mercaptans where a di C1 -C18 alkyl sulfide is reacted with a molar excess of hydrogen sulfide at elevated temperature in the pre...	08/02/1983
4313006	Process for converting dialkyl sulfides to alkyl mercaptans A process is provided for preparing alkyl mercaptans by reacting a dialkyl sulfide with hydrogen sulfide in the presence of a zeolite catalyst....	01/26/1982
4059636	Mercaptans by catalytic cleavage of organic sulfides A method is provided for preparing mercaptans by catalytic cleavage of organic sulfides with hydrogen sulfide in the presence of a supported phosphotungstic acid catalyst. The process is particularly advantageous with n-alkyl sulfide feedstock and being h...	11/22/1977
4005149	Mercaptans by hydrogen sulfide-cleavage of organic sulfides in presence of carbon disulfide In a process for preparing mercaptans by catalytic cleavage of organic sulfides with hydrogen sulfide in the presence of sulfactive catalysts a method is provided for increasing the total conversion of reactants to mercaptans by including carbon disulfide...	01/25/1977
3994980	Cobalt molybdate as catalyst for preparation of mercaptans from carbonyl compounds hydrogen sulfide and hydrogen Mercaptans are prepared by reacting an organic carbonyl compound with sulfur or hydrogen sulfide in the presence of a catalyst consisting essentially of cobalt, molybdenum and an inorganic oxide support material....	11/30/1976
3978198	Method for producing carbon disulfide A method for producing carbon disulfide by sulfurization of sulfur-containing organic compounds is described. Conventional apparatus may be employed with realization of reactant conversion rates approaching 100%, and production of undesirable by-products ...	08/31/1976

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Class 568/70 - Preparing by reacting hydrogen sulfide or a metal hydrosulfide