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| Number | Title | Issue Date |
| 7414164 | Diisobutylene process This invention is a process for producing diisobutylene from isobutylene. The process comprises first forming dry sulfonic acid resin by contacting water wet sulfonic acid resin catalyst with a first reaction feed comprising isobutylene under conditions effective to... | 08/19/2008 |
| 7332555 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7332554 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7323524 | Tandem tetramerisation-polymerisation of olefins The invention provides a process for polymerising olefins to branched polyolefins in the presence of a polymerisation catalyst and a cocatalyst, wherein the cocatalyst produces 1-octene in a selectivity greater than 30%. ... | 01/29/2008 |
| 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 |
| 7304196 | Fuel components and their selective manufacturing methods A method for dimerizing isobutene, wherein, in dimerizing conditions, the isobutene is brought into contact with a porous cation exchange resin comprising a styrene polymer, which is cross-linked with divinyl benzene, and any sulphonic acid groups adhering to the po... | 12/04/2007 |
| 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 |
| 7259285 | Oligomerization catalyst, a method for production and the use thereof An oligomerization catalyst for olefins having from 2 to 6 carbon atoms is produced by treating aluminum oxide with a nickel compound and a sulfur compound, either simultaneously or firstly with the nickel compound an then with the sulfur compound, and subsequently ... | 08/21/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7214750 | Polymerization processes The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons. ... | 05/08/2007 |
| 7179948 | Process for preparing tert-butanol The invention relates to a process for preparing tert-butanol by reaction of a homogeneous mixture comprising water, tert-butanol and an isobutene-containing hydrocarbon mixture over an acidic ion-exchange resin at from 30 to 120° C., wherein the homogeneous mixtur... | 02/20/2007 |
| 7012167 | Diisobutylene process This invention is a process for producing diisobutylene from isobutylene. The process comprises first oligomerizing isobutylene to diisobutylene using a sulfonic acid-type ion exchange resin. The oligomerization step is followed by contacting the diisobutylene produ... | 03/14/2006 |
| 7002053 | Method for preparing high-purity diisobutene The invention relates to a process for preparing high-purity diisobutene by reaction of isobutene or isobutene-containing hydrocarbon mixtures over a solid acidic ion-exchange resin containing sulfonic acid groups whose protons have been partly replaced by metal ion... | 02/21/2006 |
| 6927313 | Process for the selective oligomerization of ethylene Process for the selective oligomerization of ethylene to give α-olefins essentially consisting of C4 to C8, characterized in that it is carried out in the presence of a catalytic system comprising the complex having general formula (II): (L)M(... | 08/09/2005 |
| 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 |
| 6897347 | Fuel components and their selective manufacturing methods The invention relates to a method for dimerizing isobutene, wherein, in dimerizing conditions, the isobutene is brought into contact with a porous cation exchange resin comprising a styrene polymer, which is cross-linked with divinyl benzene, and any sulphonic acid ... | 05/24/2005 |
| 6875900 | Upflow oligomerization reaction process An oligomerization process for the production of higher aliphatic olefins is disclosed. In the process, a liquid oligomerization feed stream comprising lighter aliphatic olefins is passed to a reactor vessel. The liquid oligomerization feed stream is transported upw... | 04/05/2005 |
| 6743960 | Method for oligomerizing olefins to form higher olefins using sulfur-containing and sulfur-tolerant catalysts The present invention is related to a method for oligomerizing olefinic monomers under oligomerization conditions to form higher olefins. The novel method comprises contacting a feed comprising the olefinic monomers with a catalyst composition comprising the reactio... | 06/01/2004 |
| 6500999 | Process for the production of hydrocarbons with a high octane number by means of the selective dimerization of isobutene with acid catalysts A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by means of selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out ... | 12/31/2002 |
| 6459007 | Process for the preparation of 1-hexene Process for the preparation of 1-hexane consisting in effecting the oligomerization of ethylene in the presence of a catalyst comprising a vanaduim complex having the formula: (arene)2 VX wherein the term arene represents benzene or mono-, di-,... | 10/01/2002 |
| 6420305 | Solid acid catalyst, method for producing the same and reaction method using the same A method for producting a solid acid catalyst is provided which produces a shaped material of a solid acid catalyst containing a sulfureous component but have a high activity and having a practically sufficient handleability and mechanical strength involv... | 07/16/2002 |
| 6399843 | Upflow oligomerization reaction process An oligomerization process for the production of higher aliphatic olefins is disclosed. In the process, a liquid oligomerization feed stream comprising lighter aliphatic olefins is passed to a reactor vessel. The liquid oligomerization feed stream is tran... | 06/04/2002 |
| 6384291 | Oligomerization catalyst system and method of making and method of using such catalyst system in the oligomerization of olefins A method of preparing a catalyst system which comprises mixing a first solid material comprising at least one perfluoroalkylsulfonic acid salt with a second solid material comprising at least one silanol comprising hydroxy groups and silicon to form a gel... | 05/07/2002 |
| 6376731 | Selective olefin oligomerization A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and lower alkane diluent; advantageously the isobutylene is derived from the dehydration of... | 04/23/2002 |
| 6284937 | Process and unit for carrying out a reaction on an organic feed, such as dimerisation or metathesis, in the presence of a polar phase containing a catalyst A process for carrying out a reaction on an organic feed, for example dimerization, co-dimerization, oligomerization or metathesis of olefins, as described in which the catalyst is a catalytic metal compound dissolved in a non-aqueous ionic medium which i... | 09/04/2001 |
| 6281401 | Oligomerization of olefins A process for oligomerizing at least one heavy olefin having at least 5 carbon atoms per molecule in the presence of at least one co-fed light olefin having less than 5 carbon atoms per molecule is disclosed. The presence of the at least one co-fed light ... | 08/28/2001 |
| 6239321 | Upgrading light oligomers A process for upgrading a feedstock comprising lower oligomers and higher oligomers of isobutylene by oligomerizing the lower oligomer fraction thereof to higher molecular weight components.... | 05/29/2001 |
| 6143936 | Process for producing an ether and an olefin from a hydrocarbon cut containing at least one tertiary olefin by synthesizing then decomposing an ether, comprising a first step for purifying the olefin by washing with water A process for producing an ether and an olefin from a hydrocarbon cut containing at least one tertiary olefin, comprises synthesis of at least one tertiary alkyl ether then fractionation to obtain an organic fraction (E1) which is enriched in the tertiary... | 11/07/2000 |
| 6121502 | Process for manufacture of linear alpha-olefins using a titanium component and an organoaluminum halide component A process for the manufacture of linear alpha-olefins is disclosed. The process employs, for the purposes of oligomerizing an unsaturated aliphatic hydrocarbon to linear alpha-olefins, a catalyst mixture comprising titanium aryl and/or titanium alkoxide, ... | 09/19/2000 |
| 6011191 | Process for the production of hydrocarbons with a high octane number by the selective dimerization of isobutene A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by selective dimerization with acid catalysts characterized in that the dimerization reaction is carried out in the pre... | 01/04/2000 |
| 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 |
| 5877372 | Isobutylene oligomerization using isooctane diluent A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and isoalkane diluent; advantageously the isobutylene is derived from the dehydration of te... | 03/02/1999 |
| 5859263 | Method and apparatus for production of levulinic acid via reactive extrusion The present invention relates to a continuous process for preparing levulinic acid from starch in a reactive extrusion process. In a preferred embodiment, the extrusion takes place in a twin-screw extruder having a plurality of temperature zones wherein t... | 01/12/1999 |
| 5650548 | Olefin oligomerization process Alpha-olefin oligomer is prepared by contacting an alpha-olefin monomer which contains from about 6 to about 20 carbon atoms with a catalyst system comprising boron trifluoride, a protic promoter, and an organic sulfone, sulfoxide, carbonate, thiocarbonat... | 07/22/1997 |
| 5557023 | Olefin oligomerization in the presence of novel complexes The present invention relates to the oligomerization of lower alpha olefins, and particularly ethylene, to higher olefins in the presence of a catalyst precursor having either or both of a dithiophosphinate complex and a heterobifunctional ligand having a... | 09/17/1996 |
| 5502264 | Method of preparing unsaturated dimers of -methylstyrenes 1-pentene dimers of -methylstyrenes are produced with high selectivity in good productivity by stirring 50 to 95 parts by weight of an -methylstyrene in the presence of 50 to 5 parts by weight of an aqueous solution of a sulfonic acid, and a... | 03/26/1996 |
| 5430212 | Olefin oligomerization A catalyst composition comprising a perfluorinated ion-exchange polymer containing sulfonic acid groups supported on an inert carrier having a hydrophobic surface with a mean pore diameter of at least 1000 Å. Use of this catalyst provides improved hydroc... | 07/04/1995 |
| 5276239 | Dimerization of long-chain olefins using a silica gel alkylsulfonic acid A process is disclosed for preparing synthetic lubricant base stocks having a high dimer to trimer ratio from long-chain olefins. These synthetic lubricant base stocks are prepared in good yield by dimerizing linear olefins using a catalyst comprising a s... | 01/04/1994 |
| 5260499 | Ethylene dimerization and catalyst therefor An ethylene dimerization process catalyzed by a hetergenous catalyst comprising a nickel compound, a phosphine compound, an organoaluminum compound, and a perfluorosulfonate polymer is provided. The dimerization process comprises contacting ethylene under... | 11/09/1993 |
| 5243118 | Process for oligomerizing olefins using sulfate-activated molecular sieves An improved process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks are prepared in good yield by oligomerizing linear olefins using sulfate-activated molecular sieves as catalyst.... | 09/07/1993 |
