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| Number | Title | Issue Date |
| 7994376 | Olefin oligomerization Provided is a method of oligomerizing alpha olefins. In an embodiment, an oligomerization catalyst system is contacted in at least one continuous reactor with a feed comprising olefins; an effluent comprising product olefins having at least four carbon atoms is with... | 08/09/2011 |
| 7649123 | Propylene oligomerization process A process for the oligomerization of propylene is disclosed wherein a tungstated zirconia catalyst prepared as a distillation structure is used in a reaction distillation zone under conditions of temperature and pressure to concurrently react the propylene to produc... | 01/19/2010 |
| 7626066 | Conversion of unsaturated chemicals to oligomers An oligomerization process in which hydrocarbon feedstocks are contacted with a hydrotreating catalyst in the absence of hydrogen and in the liquid phase. The catalyst is a heterogeneous catalyst selected from supported reduced metals, metals oxides, metal sulfides ... | 12/01/2009 |
| 7429553 | Process for reducing the toxicity of hydrocarbons This invention relates to a method for reducing the toxicity of a mixture of hydrocarbons by means of fractional distillation, a distillate having a reduced toxicity and a composition including the distillate. ... | 09/30/2008 |
| 7414165 | Oligomerization process In a process for oligomerizing an olefinic hydrocarbon feedstock comprising sulfur-containing molecules, the feedstock is contacted in the absence of hydrogen with a first metal oxide catalyst at a temperature in excess of 150° C. and then is contacted under olefin... | 08/19/2008 |
| 7361625 | Photocatalyst producing method, photocatalyst, and gas purifier A carrier supporting titania thereon is further caused to carry a metal compound thereon. This metal compound is hydrogen reduced in a heating atmosphere at a first treatment temperature, then oxidized in a heating atmosphere at a second treatment temperature not hi... | 04/22/2008 |
| 7345212 | Process for olefin oligomerization A process for preparing a substantially linear olefinic hydrocarbon mixture is described in which a lower olefin feed comprising one or more C3 to C6 lower olefins is contacted in the presence of water and under olefin oligomerization condition... | 03/18/2008 |
| 7339086 | Process for the hydrogenation of branched olefins deriving from the dimerization of isobutene A process is described for the hydrogenation of olefinic streams containing sulfurated compounds, obtained starting from hydrocarbon cuts containing isobutene (by means of selective dimerization), characterized by fractionating said streams in one or more distillati... | 03/04/2008 |
| 7326817 | Process for reducing the toxicity of hydrocarbons This invention relates to a method for reducing the toxicity of a mixture of hydrocarbons by means of fractional distillation, a distillate having a reduced toxicity and a composition including the distillate. ... | 02/05/2008 |
| 7304188 | Preparation of highly pure methyl tert-butyl ether The invention relates to a process for preparing methyl tert-butyl ether (MTBE) in qualities which are suitable for organic syntheses and for use as a specialty solvent from MTBE in fuel quality. ... | 12/04/2007 |
| 7294604 | Hydrogenation and dehydrogenation processes and catalysts therefor A process for hydrogenating unsaturations in petrochemical feedstocks, the process comprising contacting the petrochemical feedstock, including at least one component having unsaturations, and hydrogen with a catalyst comprising at least one Group Ia, Ib, IIb, VIb, ... | 11/13/2007 |
| 7291759 | Oligomerization of alkenes in a plurality of successive heterogeneous catalyst zones Process for oligomerizing an alkene stream over a solid catalyst comprising sulfur and nickel, in which the oligomerization is carried out in two or more successive catalyst zones and the molar ratio of sulfur to nickel in the first catalyst zone is less than 0.5 an... | 11/06/2007 |
| 7291758 | Process for the production of highly reactive polyisobutenes The present invention relates to a process for the production of highly reactive polyisobutenes with a content of terminal vinylidene groupings of greater than 80 mol % and an average molecular weight of 500 to 10,000 Dalton by cationic polymerization of isobutene o... | 11/06/2007 |
| 7253330 | Oligomerization process In a process for oligomerizing an olefinic hydrocarbon feedstock comprising sulfur-containing molecules, the feedstock is contacted in the absence of hydrogen with a first metal oxide catalyst at a temperature in excess of 150° C. and then is contacted under olefin... | 08/07/2007 |
| 7250543 | Preparation of catalyst and use for high yield conversion of methane to ethylene A perovskite catalyst is prepared using a ceramic sol-sol methodology comprising preparing slurry in water of an alkaline earth metal salt, a powdered metal salt and a powdered transition metal oxide, adding a polymeric binder to form a paste, drying and comminuting... | 07/31/2007 |
| 7244870 | Method for producing polyisobutenes Polyisobutenes in which at least 60 mol % of the polymer chains have at least one olefinically unsaturated terminal group are prepared by cationic polymerization of isobutene or isobutene-containing monomer mixtures in the condensed phase by a process in which the p... | 07/17/2007 |
| 7205446 | Conversion of unsaturated chemicals to oligomers An oligomerization process in which hydrocarbon feedstocks are contacted with a hydrotreating catalyst in the absence of hydrogen and in the liquid phase. The catalyst is a heterogeneous catalyst selected from supported reduced metals, metals oxides, metal sulfides ... | 04/17/2007 |
| 7161053 | Oligomerization of isobutene in N-butenic hydrocarbon streams Isobutene in isobutenic hydrocarbon mixtures is oligomerized over a solid acidic ion exchange resin, said acidic ion exchange resin containing, for example, sulfonic acid groups, some of whose protons have been exchanged for metal ions. ... | 01/09/2007 |
| 7145049 | Oligomerization process Alkenes, such as normal butenes in a mixed C4 stream are oligomerized, preferably to dimers, which are dimerized in a distillation column reactor over ZSM-57 zeolite catalyst at high conversions and high selectivity to octenes. Prior to oligomerization th... | 12/05/2006 |
| 7112711 | Alkene oligomerization process A process for oligomerising alkenes having from 3 to 6 carbon atoms which comprises contacting a feedstock comprising a) one or several alkenes having x carbon atoms, and, b) optionally, one or several alkenes having y carbon atoms, x and y being different, with a c... | 09/26/2006 |
| 7041866 | Solid-acid isomerization catalyst and process A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component co... | 05/09/2006 |
| 7037875 | Catalyst support A support for a catalyst for controlling vehicular exhaust emissions comprising a high surface area refractory metal oxide, e.g., gamma-alumina, having a monomolecular layer of a second oxide selected from the group consisting of titanium dioxide, cerium dioxide and... | 05/02/2006 |
| 6979395 | Fuel composition This invention relates to a fuel composition comprising a base fuel having a final boiling point above 150° C. and an anti-foam, characterised in that the anti-foam comprises di-isobutylene in an amount greater than 2.5% by volume based on the total fuel compositio... | 12/27/2005 |
| 6977322 | Isomerization catalyst and processes A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a tungstated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component ... | 12/20/2005 |
| 6900152 | Catalyst for trimerization of ethylene and process for trimerizing ethylene using the catalyst A catalyst used for trimerization of ethylene into 1-hexene is descrobed, which comprises (i) a specific organometallic complex having a neutral multidentate ligand having a tripod structure, (ii) an alkylaluminoxane, and an optional ingredient selected from: (iii) ... | 05/31/2005 |
| 6884916 | Conversion of unsaturated chemicals to oligomers An oligomerization process in which hydrocarbon feedstocks are contacted with a hydrotreating catalyst in the absence of hydrogen and in the liquid phase. The catalyst is a heterogeneous catalyst selected from supported reduced metals, metals oxides, metal sulfides ... | 04/26/2005 |
| 6852898 | Method for producing oligomers In a process for preparing essentially unbranched oligomers of alkenes having from 4 to 6 carbon atoms starting from the alkenes or a hydrocarbon stream comprising such alkenes over a nickel-containing heterogeneous catalyst in an adiabatically operated reactor at f... | 02/08/2005 |
| 6593505 | Catalyst of mixed fluorosulfonic acids A catalyst comprising A) a stationary acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid, and a sulfated metal oxide; and B) a mobile acid component sele... | 07/15/2003 |
| 6388118 | Process for the preparation of cyclopentadienyl compounds and compounds obtained therefrom A process is disclosed for preparing bis-cyclopentadienyl compounds bridged by a single carbon atom by reacting a carbonyl compound with a cyclopentadienyl compound in the presence of a base and of an oxygen-containing solvent having an atomic ratio carbo... | 05/14/2002 |
| 6384154 | Preparation of halogen-free, reactive polyisobutene A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 60 mol % and an average molecular weight Mn of 800-3000 dalton by cationic polymerization in the liquid phase of isobutene over an a... | 05/07/2002 |
| 6348635 | Start-up polymerization process A process for starting up a reaction for the polymerization of an olefin in the gas phase carried out using a catalyst based on chromium oxide in a fluidized bed reactor through which moves a reaction gas mixture containing the olefin, wherein in the star... | 02/19/2002 |
| 6337428 | Conversion of hydrocarbons with a dealuminated NU-86 zeolite catalyst A process for the catalytic conversion of hydrocarbons, in particular for the oligomerization of olefins wherein the catalyst comprises a zeolite which is at least partially in its acid form. The zeolite is a NU-86 zeolite comprising silicon and at least ... | 01/08/2002 |
| 6127301 | Catalyst system and method for reaction of olefin The present invention provides a novel catalyst system which can be preferably used in the trimerization, oligomerization reaction or polymerization reaction of an olefin, and a method for the trimerization, oligomerization or polymerization reaction of a... | 10/03/2000 |
| 6087538 | Addition reaction of hydroxyl-containing compounds with alkynes or allenes Compounds of the formula I and II ##STR1## where R1 is hydrogen or an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical or an acyl radical, it being possible for these radicals to carry further substituents which do ... | 07/11/2000 |
| 6063973 | Synthesis of branched polyethylene fluids for use in lubricant compositions The novel synthetic polyethylene fluids of the present invention are characterized by high viscosity indices (about 94-151 VI), low pour points (about -60 to -10° C.), and a kinematic viscosity of about 6 to 28 cSt KV at 100° C. The product compositions... | 05/16/2000 |
| 6043401 | Reactive, low molecular weight, viscous poly(1-olefins) and copoly(1-olefins) and their method of manufacture Catalysts and processes are described to make low molecular weight, essentially terminally-unsaturated, viscous poly(1-olefin) or copoly(1-olefin) having a high terminal vinylidine content from a feed stock containing one or more 1-olefin and other volati... | 03/28/2000 |
| 6043403 | Process for the preparation of cyclopentadienyl compounds and compounds obtained therefrom A process is disclosed for preparing bis-cyclopentadienyl compounds bridged by a single carbon atom by reacting a carbonyl compound with a cyclopentadienyl compound in the presence of a base and of an oxygen-containing solvent having an atomic ratio carbo... | 03/28/2000 |
| 6031145 | Catalytic composition and process for oligomerising ethylene in particular to 1-butene and/or 1-hexene A catalyst composition for a process of oligomerising ethylene to produce 1-butene and/or 1-hexene wherein the catalytic composition is obtained by mixing at least one chromium compound with at least one aryloxy aluminum compound with general formula R | 02/29/2000 |
| 5962761 | Process for linear alpha-olefin production A process for the continuous oligomerization of ethylene to produce linear alpha olefins by oligomerizing ethylene in a polar phase comprising a solution of transition metal catalyst system at oligomerization conditions including a temperature and pressur... | 10/05/1999 |
| 5945574 | Olefin oligomerization process and catalysts therefor The use of novel heterogeneous catalyst complexes as catalysts for oligomerizing alpha-olefins is disclosed. The complexes are formed from (i) a solid olefin polymer having a linear backbone and a plurality of pendant omega-hydroxyalkyl groups, (ii) an or... | 08/31/1999 |
