Abstract: The invention relates to a process for preparing methyl mercaptan from a mixture of carbon oxide, hydrogen sulfide and hydrogen, in the presence of a catalyst based on molybdenum and potassium supported on zirconia, said catalyst not comprising any promoter.

Abstract: The present invention discloses methods for synthesizing asymmetrical sulfide compounds and asymmetrical ether compounds from a variety of ether, sulfide, alcohol, and thiol reactants that are contacted in the presence of a suitable catalyst. Conversions of the limiting reactant to the desired asymmetrical sulfide or asymmetrical ether compound generally exceed 50%.

Abstract: Disclosed herein are systems and processes involving the catalyzed cleavage reaction of dimethyl sulfide to methyl mercaptan. The catalyzed cleavage reaction can be a standalone system or process, or can be integrated with a methyl mercaptan production plant.

Abstract: The invention relates to a catalyst comprising a support based on alumina or silica or silica-alumina, at least one element of group VIII, at least one element of group VIB and at least one additive selected from ?-valerolactone, 4-hydroxyvaleric acid, 2-pentenoic acid, 3-pentenoic acid or 4-pentenoic acid. The invention also relates to the process for the preparation of said catalyst and the use thereof in a hydrotreatment and/or hydrocracking process.

Abstract: Disclosed herein are systems and processes involving the catalyzed cleavage reaction of dimethyl sulfide to methyl mercaptan. The catalyzed cleavage reaction can be a standalone system or process, or can be integrated with a methyl mercaptan production plant.

Abstract: The present invention provides modified multifunctional thiol-ene monomers wherein one or more thiols are reacted with a Michael addition reactive double bond compound. The present invention further discloses photocurable thiol-ene formulations comprising thiol-ene monomers including the modified multifunctional thiols. The present invention further discloses photocurable thiol-ene formulations comprising thiol-ene monomers and Michael addition reactive double bond molecules and a Michael catalyst. The formulations of the present invention can be photocured to make films or coatings. In a further disclosure, the formulations, including those comprised of unmodified multifunctional thiols and multifunctional enes, are photocured to form films applied to non-flexible or flexible polymer or non-polymer substrates suitable for food packaging, electronic products, optical products and other applications and free-standing films.

Abstract: A process for compressing a hydrogen-sulfide-comprising gas stream, which comprises (i) compressing the hydrogen-sulfide-comprising gas stream in a compressor, (ii) flushing the compressor with a mixture comprising dialkyl polysulfides, dialkyl disulfides and at least one amine; a process for producing sulfur compounds, selected from the group consisting of alkylmercaptans, dialkyl disulfides and alkanesulfonic acids, which comprises the conversion of hydrogen-sulfide-comprising gas streams, wherein the hydrogen-sulfide-comprising gas streams are compressed according to the process comprising steps i) and ii); and also the use of a mixture comprising dialkyl polysulfides, dialkyl disulfides and at least one amine for removing sulfur deposits which occur in the compression of hydrogen-sulfide-comprising gas streams.

Abstract: The present invention relates to a process for continuously preparing methyl mercaptan from hydrogen sulphide and methanol in a direct connection with the preparation of hydrogen sulphide.

Abstract: Provided is a process for continuously preparing methyl mercaptan by reacting a reactant mixture comprising solid, liquid and/or gaseous carbon- and/or hydrogen-containing compounds with air or oxygen, and/or water and sulfur.

Abstract: The invention relates to a process for continuously preparing methyl mercaptan by reacting a mixture comprising carbon compounds with sulfur and hydrogen, wherein the carbon disulfide and hydrogen sulfide compounds which form are subsequently converted to methyl mercaptan.

Abstract: This invention is related to a preparation method of a supported catalyst Mo—O—K-MexOy for the synthesis of methanethiol from H2S-containing syngas. The catalyst comprises of an active component of Mo—O—K-based species, an active promoter and a support denoted as metal (or metals)-carrier. The support is prepared by electroless plating method in such a way that the metal or metals chosen are plated onto the surface of the carrier. Transition metal, especially Fe, Co or Ni are selected to be the plating metal, while SiO2, Al2O3 or TiO2 are selected to be carrier. The catalyst thus prepared is found to be efficient for the synthesis of methanethiol from H2S-containing syngasor carbon oxides/hydrogen mixtures, especially regarding a minor formation of the by-product CO2.

Abstract: A method is described to prepare a Mo containing supported catalyst comprising TeO2 as active promoter and a process for preparing methanethiol in the presence of said catalyst.

Abstract: 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.

Abstract: 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 space velocity. The invention further refers to a process for the preparation of a solid, preformed catalyst system.

Abstract: Provided is a process for continuously preparing methyl mercaptan by reacting a reactant mixture comprising solid, liquid and/or gaseous carbon- and/or hydrogen-containing compounds with air or oxygen, and/or water and sulfur.

Abstract: The present invention refers to a catalyst for the manufacture of methyl mercaptan from carbon oxides comprising Mo and K compounds and oxides or sulfides of metals chosen from the manganese group. The improvement of the present process consists of the fact that carbon dioxide can be converted with higher conversions and selectivities to methyl mercaptan as compared to state-of-the-art technologies, with only minor amounts of carbon monoxide being formed as side product. Simultaneously, carbon monoxide can be easily converted into carbon dioxide and hydrogen by reaction with water using established water-gas-shift-technologies thus increasing the overall selectivity to methyl mercaptan.

Abstract: 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.

Abstract: 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 in the gas phase over a solid catalyst.

Abstract: 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.

Abstract: 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 in the gas phase over a solid catalyst.

Abstract: 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 alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.

Abstract: 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 alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.

Abstract: 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 within the non-thermal pulsed plasma corona reactor with the reaction CH4+H2S?CH3SH+H2. An apparatus for the production of methyl mercaptan using a non-thermal pulsed plasma corona reactor is also provided.

Abstract: 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 within the non-thermal pulsed plasma corona reactor with the reaction CH4+H2S→CH3SH+H2. An apparatus for the production of methyl mercaptan using a non-thermal pulsed plasma corona reactor is also provided.

Abstract: 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), tungsten (W), manganese (Mn), nickel (Ni), iron (Fe), zinc (Zn), cobalt (Co), copper (Cu), tin (Sn), vanadium (Va) and mixtures thereof, optionally promoted by an alkali metal sulfide, to convert said hydrogen, carbon oxide and hydrogen sulfide to methyl mercaptans, (primarily methanethiol (CH.sub.3 SH)), and the gas stream containing the methyl mercaptans are passed in contact with a catalyst comprising a supported metal oxide or a bulk metal oxide in the presence of an oxidizing agent and for a time sufficient to convert at least a portion of the methyl mercaptan to formaldehyde (CH.sub.2 O), and sulfur dioxide (SO.sub.2).

Abstract: A method wherein a sour natural gas stream can be treated to produce formaldehyde from methane and methyl mercaptans, (primarily methanethiol (CH.sub.3 SH) and a small amount of dimethyl sulfide (CH.sub.3 SCH.sub.3)) from hydrogen sulfide, and the methyl mercaptans preferably are passed in contact with a catalyst comprising a supported metal oxide or a bulk metal oxide in the presence of an oxidizing agent and for a time sufficient to convert at least a portion of the methyl mercaptan to formaldehyde (CH.sub.2 O), and sulfur dioxide (SO.sub.2).

Abstract: 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 activator. A two-stage impregnation with intermediate drying produces a catalyst which exhibits distinctly better selectivity for formation of methyl mercaptan than catalysts obtained by single-stage impregnation.

Abstract: 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 by working in the presence of water and/or hydrogen sulphide.

Abstract: 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 mercaptan.

Abstract: Linear C.sub.4 + alkyl mercaptans of high purity are prepared by the reaction of a di-linear(C.sub.4 +) alkyl sulfide with hydrogen sulfide at elevated temperature in the presence of a specified transition alumina material.

Abstract: 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 .alpha.- or .beta.-alumina trihydrate and the trihydrate is sulfided, the product of said process, and the method of producing mercaptans from alcohols or ethers and hydrogen sulfide at elevated temperature in the presence of said novel catalyst, are disclosed herein.

Abstract: 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 [TcO.sub.2 L.sub.2 ].sup.+, are useful for body imaging, particularly myocardial imaging. The ligands have the general formulaY.sub.2 QZQY.sub.2where Q is phosphorus orZ is a --CC-- or --CCC-- or --COC-- groups,the four groups Y are all C1-C8 saturated hydrocarbon or fluorohydrocarbon with 1-3 ether oxygen atoms.

Abstract: The invention relates to the synthesis of dithiols and more particularly that of .alpha.,.omega.-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 of a solid acid catalyst. The alkane dithiol is obtained selectively and a tertiary-alkyl mercaptan is obtained as by-product. It is possible to reuse the latter in a cyclical process to produce the original di-(tertiary-alkylthio)alkane.

Abstract: 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 secondary carbon atom, with hydrogen sulfide in the presence of an appropriate acid catalyst, especially an aluminosilicate or an ion-exchange resin.

Abstract: Methanethiol is produced from a gaseous feed comprising a mixture of H.sub.2 S and CO by contacting said feed with a catalyst comprising rutile titania at a temperature of at least about 225.degree. C.

Abstract: 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 has not reacted, the gas to be recycled has removed from it water which it contains following the reaction in contact with the catalyst.

Abstract: 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 form carbonyl sulfide,(b) contacting the carbonyl sulfide with oxygen to form carbon monoxide and sulfur dioxide, and(c) hydrogenating at least one of carbon monoxide and carbonyl sulfide to the desired organic compound.

Abstract: Methanethiol is produced from a gaseous feed comprising a mixture of H.sub.2 S and CO by contacting said feed, at a temperature of at least about 225.degree. C., with a catalyst comprising an oxide of a metal selected from the group consisting of V, Nb, and Ta and mixtures thereof, preferably V, supported on titania and wherein at least a portion, and preferably at least about 25 wt. %, of said supported oxide is in a non-crystalline form.

Abstract: 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 catalyst system comprising a porous alumina-containing support upon which is deposited a mixture of manganese sulfide and alkali metal sulfide.

Abstract: 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 alumina-containing support upon which is deposited a mixture of one or more selected metallic sulfides and an alkali metal sulfide.

Abstract: A continuous process is provided for the vapor-phase preparation of C.sub.1 -C.sub.18 alkyl mercaptans where a di C.sub.1 -C.sub.18 alkyl sulfide is reacted with a molar excess of hydrogen sulfide at elevated temperature in the presence of a specified synthetic zeolite containing at least 10 percent by weight of an alkali metal, expressed as Na.sub.2 O.

Abstract: A process is provided for preparing alkyl mercaptans by reacting a dialkyl sulfide with hydrogen sulfide in the presence of a zeolite catalyst.