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| Number | Title | Issue Date |
| 7371908 | Process for catalytic hydrogenation Hydrocarbon streams are hydrogenated catalytically without using a different solvent from the hydrocarbon stream to be hydrogenated, with a basic compound being added to the starting-material stream. The formation of undesired secondary components on the catalyst is... | 05/13/2008 |
| 7355084 | Method for hydrogenating organic compounds by means of Ru/SiOcatalysts In a process for hydrogenating at least one organic compound, the organic compound or compounds is/are brought into contact with a hydrogen-containing gas in the presence of a catalyst which comprises, as active metal, ruthenium either alone or together with at leas... | 04/08/2008 |
| 7342143 | Polyalphaolefin having a low halide concentration and a method of manufacturing thereof A method for the processing of a polyalphaolefin feedstock having a concentration of organic halide to thereby yield a polyalphaolefin end-product having a low concentration of organic halide. The method includes a hydrogenation step whereby the polyalphaolefin feed... | 03/11/2008 |
| 7297824 | Ni hydrogenation catalysts, manufacture and use Improved Ni catalysts for hydrogenation reactions are disclosed. The catalysts are useful for hydrogenation such as selective hydrogenation of acetylenic impurities in crude olefin and diolefin streams. The catalysts are prepared by depositing nickel on a porous sup... | 11/20/2007 |
| 7273542 | Process and apparatus for recovering olefins The present invention relates to a process and apparatus for recovering product from reactor effluent of a reactor for a hydrocarbon feedstream. An indigenous C4 stream is used as lean oil in a demethanizer, which facilitates significant cost and operatio... | 09/25/2007 |
| 7115790 | Method for the production of 1-octene by reductive telomerisation The invention relates to a process for preparing 1-octene by telomerization of 1,3-butadiene using a reducing agent in the presence of a telomerization catalyst and partial hydrogenation of the octadiene obtained in this way. ... | 10/03/2006 |
| 7090817 | Process for the preparation of hydroxylammonium The invention relates to a process for the preparation of hydroxylammonium, said process comprising the steps of: a) feeding gaseous hydrogen to a reaction mixture, said reaction mixture comprising an aqueous reaction medium and a gaseous phase; ... | 08/15/2006 |
| 7078577 | DihydroDicyclopentadiene production A method for forming dihydroDicyclopentadiene comprises mixing a source of dicyclopentadiene with at least one solvent and at least one reactive component in the presence of a source of hydrogen and a selective hydrogenation catalyst, the solvent and reactive compon... | 07/18/2006 |
| 7078130 | Metallic mesoporous transition metal oxide molecular sieves, room temperature activation of dinitrogen and ammonia production This invention provides novel stable metallic mesoporous transition metal oxide molecular sieves and methods for their production. The sieves have high electrical conductivity and may be used as solid electrolyte devices, e.g., in fuel cells, as sorbents, e.g. for h... | 07/18/2006 |
| 6740787 | Process for treatment of C4 hydrocarbons that comprise butadiene and acetylene compounds that comprise stages for distillation and selective hydrogenation A process for treatment of a batch with four carbon atoms that contains diene compounds and a minor portion of acetylene compounds is described. A portion of the fluid that circulates in a distillation zone that is enriched with acetylene compounds is drawn off late... | 05/25/2004 |
| 6693225 | Process for hydrogenating cuts containing hydrocarbons, in particular unsaturated molecules containing at least two double bonds or at least one triple bond Hydrogenation of a liquid cut containing hydrocarbons, in particular unsaturated molecules containing at least two double bonds or at least one triple bond, is described wherein the unsaturated molecules are at least partially hydrogenated to less unsatur... | 02/17/2004 |
| 6455023 | Metallic catalysts for non-neutral liquid media Carbon monolith-supported catalysts with high leach resistance used in catalytic applications involving strong acidic and basic conditions in a pH range of from 0 to 6.5 and from 7.5 to 14, are respectively described. The leach resistance of the catalyst ... | 09/24/2002 |
| 6344593 | Continuous preparation of cyclohexene by partial hydrogenation of benzene Cyclohexene is prepared by partial hydrogenation of benzene with hydrogen in the presence of water and ruthenium catalyst at elevated temperature and superatmospheric pressure by a continuous process in which benzene is introduced in gaseous form and the ... | 02/05/2002 |
| 6333441 | Preparation of cis--olefins A cis-olefin of the formula: R1 --CH.dbd.CH--R2 is prepared by reducing an alkyne of the formula: R1 --C.ident.C--R2 with formic acid in the presence of a palladium catalyst. R1 and R2 are ... | 12/25/2001 |
| 6281397 | Catalytic composition for the hydrogenation of olefinically unsaturated organic compounds A catalytic composition effective in the selective hydrogenation of olefinic double bonds, comprising the reaction product between: (A) at least one complex of a transition metal having the following general formula (I): M(R1)(R2)(R3... | 08/28/2001 |
| 6239322 | Selective hydrogenation catalysts containing palladium, also tin and/or lead, and the preparation and use thereof A particulate selective hydrogenation catalyst for hydrogenating unsaturated diolefinic hydrocarbons to -olefinic hydrocarbons at rates which are at least 1.5 times higher than the rate of hydrogenation of -olefinic hydrocarbons to saturated... | 05/29/2001 |
| 5981818 | Integrated cracking and olefins derivative process utilizing dilute olefins A novel process is provided which integrates the cracking of hydrocarbon containing feedstocks with the olefins purification and olefins derivative process utilizing dilute olefin feedstocks.... | 11/09/1999 |
| 5969202 | Method for producing cycloolefin and cycloalkane under controlled pressure A method for producing a cycloolefin and a cycloalkane, which method comprises: a step of hydrogenating a monocyclic aromatic hydrocarbon under an acidic condition in the presence of a catalyst composition, (i) wherein said catalyst composition is a slurr... | 10/19/1999 |
| 5898091 | Process and plant for the conversion of olefinic C4 and C5 cuts to an ether and to propylene For the conversion of an olefinic C4 or C5 cut to an alkyl-tertiobutylether or alkyl-tertioamylether and to propylene, by metathesis, the process comprises four successive steps: (1) selective hydrogenation of the diolefins with simu... | 04/27/1999 |
| 5866734 | Hydrogenation process In a process for the hydrogenation of multiply unsaturated C2 -C8 hydrocarbons, in particular C2 -C8 -alkynes and/or C4 -C8 -alkynenes and/or C4 -C8 -alkadienes in fluids ... | 02/02/1999 |
| 5817901 | Selective hydrogenation of hydrocarbon cuts containing monounsaturated and polyunsaturated hydrocarbons A process for the selective hydrogenation of a fraction of hydrocarbons containing 2 to 20 carbon atoms and comprising monounsaturated olefinic hydrocarbons and/or aromatic compounds and at least one polyunsaturated hydrocarbon from the group formed by ac... | 10/06/1998 |
| 5777186 | Process for hydrogenating benzene in hydrocarbon oils A process for selectively hydrogenating benzene in a hydrocarbon oil is disclosed. The process comprises reacting the hydrocarbon oil with hydrogen gas in the presence of a hydrogenation catalyst comprising at least one metal in Group VIII of the Periodic... | 07/07/1998 |
| 5698752 | Selective hydrogenation process A selective hydrogenation of an alkyne in an olefin-containing fluid is provided which comprises contacting the fluid and hydrogen gas with a catalyst in the presence of at least one sulfur compound, under reaction conditions effective to produce at least... | 12/16/1997 |
| 5656761 | Method for pretreating a catalyst slurry and a method for the continuous partial hydrogenation of a monocyclic aromatic hydrocarbon by using the pretreated catalyst slurry A method for pretreating a slurry containing a ruthenium catalyst for use in the continuous partial hydrogenation of monocyclic aromatic hydrocarbons is disclosed. In this method, the above-mentioned slurry is heat-treated at a temperature of from 60° to... | 08/12/1997 |
| 5639927 | Process of producing cycloolefin A process of producing cycloolefin, comprises the step of subjecting a monocyclic aromatic hydrocarbon to partial hydrogenation reaction in the presence of water and a ternary catalyst containing (a) ruthenium, (b) zinc and (c) at least one selected from ... | 06/17/1997 |
| 5589600 | Preparation of cyclohexene by partial hydrogenation of benzene A process for the preparation of cyclohexene by partial hydrogenation of benzene with hydrogen in the presence of water and ruthenium catalysts modified with nickel, at elevated temperature in the liquid phase, wherein alloys of ruthenium with nickel are ... | 12/31/1996 |
| 5583274 | Alkyne hydrogenation process C2 -C6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal f... | 12/10/1996 |
| 5569803 | Method for producing a cycloolefin A method for producing a cycloolefin, which comprises partially hydrogenating a monocyclic aromatic hydrocarbon in the presence of water and a ruthenium catalyst supported on silica modified by zirconium oxide.... | 10/29/1996 |
| 5569802 | Catalyst, process for the preparation thereof and process for the selective hydrogenation of unsaturated compounds The present invention relates to a catalyst for the selective hydrogenation of an unsaturated compound, based on a noble metal and/or a noble-metal oxide on an aluminum oxide support, and to a process for the preparation of the catalyst. The present inven... | 10/29/1996 |
| 5491233 | Catalytic asymmetric reduction of trisubstituted olefins A catalytic asymmetric reduction process, which, by hydrogenating trisubstituted olefins, yields a corresponding organic compound having a high level of enantiomeric purity is disclosed. The process is also effective for the catalytic asymmetric reduction... | 02/13/1996 |
| 5475174 | Process for the selective hydrogenation of compounds comprising endo and exocyclic unsaturations The invention concerns a process for the selective hydrogenation of polyunsaturated cyclic compounds comprising at least one endocyclic carbon-carbon double bond and at least one terminal exocyclic carbon-carbon double bond, said double bonds not being co... | 12/12/1995 |
| 5475172 | Process for fullerene functionalization Di-addended and tetra-addended Buckminster fullerenes are synthesized through the use of novel organoborane intermediates. The C60, C70, or higher fullerene is reacted with a borane such as BH3 in a solvent such as toluene... | 12/12/1995 |
| 5475173 | Hydrogenation process and catalyst therefor A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C4 -C10 diolefi... | 12/12/1995 |
| 5414171 | Process and washed catalyst for partially hydrogenating aromatics to produce cycloolefins This is a catalyst and a process for partially hydrogenating polycyclic and monocyclic aromatic hydrocarbons such as benzene, naphthalenes, biphenyls, and alkylbenzenes to produce the corresponding cycloolefins. The catalyst is a hydrogenation catalyst co... | 05/09/1995 |
| 5334790 | Process and catalyst for partially hydrogenating aromatics to produce cycloolefins This is a catalyst and a process for partially hydrogenating polycyclic and monocyclic aromatic hydrocarbons such as benzene, naphthalenes, biphenyls, and alkylbenzenes to produce the corresponding cycloolefins. The catalyst is a hydrogenation catalyst co... | 08/02/1994 |
| 5300716 | Process for the preparation of polyunsaturated olefins A process for the preparation of a polyunsaturated olefinic compound, i.e. undeca-1,3,5-triene, in its (3E,5Z) isomeric form, consisting of four consecutive steps starting from deca-1,4-diyne, is disclosed. Said process has the advantage of making it possible ... | 04/05/1994 |
| 5264641 | Aromatics saturation with catalysts comprising crystalline ultra-large pore oxide materials There is provided a method for hydrogenating aromatics with a catalyst comprising a crystalline ultra-large pore oxide material. The catalyst also comprises a hydrogenation metal, such as palladium. The process may be used to saturate benzene to form cycl... | 11/23/1993 |
| 5256163 | Flow liquid-phase chemical reaction process The present invention provides a flow liquid-phase chemical reaction system in which a high pressure reservoir unit holds a solvent solution which contains an organic reactant and a gas reactant. The quantity of gas reactant dissolved in the solvent solut... | 10/26/1993 |
| 5254761 | Process for selective reduction of unsaturated organic compounds A reducible unsaturated organic compound is reduced with diimide in an aqueous emulsion comprised of water, an organic phase which contains the compound to be reduced, and an effective stabilizing amount of an anionic surfactant. The organic compound is p... | 10/19/1993 |
| 5233110 | Process for the preparation of cyclooctene A process for the preparation of cyclooctene which comprises irradiating 1,5-cyclooctadiene with light in the presence of a photodehydrogenation catalyst, acetone and an alcohol to partially hydrogenate the 1,5-cyclooctadiene.... | 08/03/1993 |
