| Patent Number |
Title Of Patent |
Date Issued |
| 7355058 |
Haloaluminoxane compositions, their preparation, and their use in catalysis |
April 8, 2008 |
| Novel haloaluminoxane compositions have been formed. The halogen is fluorine, chlorine, and/or bromine, and the amount of halogen atoms present in said composition is in the range of about 0.5 mole % to about 15 mole % relative to aluminum atoms. Processes for producing haloaluminoxa |
| 7193100 |
Haloaluminoxane compositions, their preparation, and their use in catalysis |
March 20, 2007 |
| Novel haloaluminoxane compositions have been formed. The halogen is fluorine, chlorine, and/or bromine, and the amount of halogen atoms present in said composition is in the range of about 0.5 mole % to about 15 mole % relative to aluminum atoms. |
| 6746981 |
Particulate group 4 metallocene-aluminoxane catalyst compositions devoid of preformed support, a |
June 8, 2004 |
| Described are solid olefin polymerization catalysts that have, inter alia, very high productivities (at least 18,000 grams of polyethylene per gram of catalyst in one hour) as shown by a standard test procedure for measuring this property or characteristic. Such particulate catalysts can |
| 6730758 |
Particulate group 4 metallocene-aluminoxane catalyst compositions devoid of preformed support, a |
May 4, 2004 |
| Described are solid olefin polymerization catalysts that have, inter alia, very high productivities as shown by a standard test procedure for measuring this property or characteristic, and excellent morphology. Such particulate catalysts can be prepared by prepolymerizing a controlled |
| 6677265 |
Process of producing self-supported catalysts |
January 13, 2004 |
| The process features concurrent feeds into the liquid phase of a prepolymerization reaction mixture. These feeds are: a) separate continuous or substantially continuous feeds of (i) a polymerizable vinylolefin, and (ii) a solution in an organic liquid solvent of a metallocene and an a |
| 6551955 |
Particulate group 4 metallocene-aluminoxane catalyst compositions devoid of preformed support, a |
April 22, 2003 |
| Described are solid olefin polymerization catalysts that have, inter alia, very high productivities as shown by a standard test procedure for measuring this property or characteristic, and excellent morphology. Such particulate catalysts can be prepared by prepolymerizing a controlled |
| 6521728 |
Particulate group 4 metallocene-aluminoxane catalyst compositions devoid of preformed support, a |
February 18, 2003 |
| Described are solid olefin polymerization catalysts that have, inter alia, very high productivities (at least 18,000 grams of polyethylene per gram of catalyst in one hour) as shown by a standard test procedure for measuring this property or characteristic. Such particulate catalysts can |
| 6294496 |
Particulate group 4 metallocene-aluminoxane catalyst compositions devoid of preformed support, a |
September 25, 2001 |
| Described are solid olefin polymerization catalysts that have, inter alia, very high productivities (at least 18,000 grams of polyethylene per gram of catalyst in one hour) as shown by a standard test procedure for measuring this property or characteristic. Such particulate catalysts can |
| 6248265 |
Clean generation of a fluoroaryl grignard reagent |
June 19, 2001 |
| Fluoroaryl Grignard reagents are produced from a hydrocarbyl Grignard reagent and fluoroaromatic compounds via separate additions of different fluoroaromatic compounds, such that the conversion of hydrocarbyl Grignard reagent to the desired fluoroaryl Grignard reagent is essentially |
| 6129863 |
Clean generation of a perfluoroaryl grignard reagent |
October 10, 2000 |
| Perfluoroaryl Grignard reagents are produced from a hydrocarbyl Grignard reagent and polyhaloaromatic compounds via separate additions of different polyhaloaromatic compounds, such that the conversion of hydrocarbyl Grignard reagent to the desired perfluoroaryl Grignard reagent is es |
| 6034024 |
Heat treated alumoxanes |
March 7, 2000 |
| A process is described which comprises heating a methylalumoxane solution in an aromatic hydrocarbon solvent at a temperature of at least 35.degree. C. for at least 0.5 hour in an inert, dry atmosphere such that the resulting heat-treated composition provides, in a supported metallocene |
| 5959151 |
Process for the purification of pentafluorophenyl boron compounds |
September 28, 1999 |
| One aspect of the invention is a process for purifying a pentafluorophenyl boron compound from a crude mixture comprised of the pentafluorophenyl boron compound and impurities, the impurities at least comprised of an ether and water, the process comprising: (a) mixing the crude mixture w |
| 5856255 |
Preparation of supported auxiliary catalysts at elevated temperature and pressure in a closed ve |
January 5, 1999 |
| A slurry is formed from an auxiliary catalyst (e.g., an aluminoxane or organoboron compound), a porous inorganic oxide carrier, and an inert organic solvent. The slurry is enclosed in a closed vessel and the temperature and pressure of the enclosed slurry are increased to a temperatu |
| 5739368 |
Use of heat treated alumoxanes in preparing supported catalysts |
April 14, 1998 |
| Alumoxane, and especially methylalumoxane, which provide supported metallocene and/or transition metal catalyst compositions having increased activity are prepared by heating the alumoxane prior to placing it on the support. |
| 5693261 |
Preparation of pentafluorophenyl compounds |
December 2, 1997 |
| Pentafluorophenylmagnesium halides are prepared by a Grignard exchange reaction of hydrocarbylmagnesium halide with pentafluorochlorobenzene. The pentafluorophenylmagnesium halides are converted to pentafluorophenyl metal or metalloid derivatives by reacting them with metal or metalloid |
| 5648308 |
Process for upgrading metallocene catalysts |
July 15, 1997 |
| Inorganic and organic impurities are removed from a metallocene catalyst compound comprising the steps of (a) separating inorganic impurities from said compound by forming a solution of said compound in an organic solvent medium which is substantially a non-solvent for said inorganic imp |
| 5600004 |
Process for preparing pentafluorophenyl compounds |
February 4, 1997 |
| An improved process for recovering pentafluorophenyl metal or metalloid compounds prepared by reacting pentafluoromagnesium halides with a metal or metalloid halide in ether solutions uses a precipitating agent such as an ether to precipitate the by-products from the reaction mixture. |
| 5302733 |
Preparation of metallocenes |
April 12, 1994 |
| A racemic mixture of a chiral, silicon bridged transition metal metallocene, which is substantially free of meso isomer, is precipitated directly from a reaction mixture as it is formed by reacting an organic solvent solution of an alkali metal salt of a silicon bridged ligand with a |
| 5200537 |
Process for preparing metallocenes |
April 6, 1993 |
| A process is provided for preparing a transition metal compound of the formula: (RC.sub.5 H.sub.4).sub.2 MX.sub.2, where R is hydrocarbyl or silahydrocarbyl of 1 to 10 carbon atoms, M is titanium or zirconium and X is halogen. The process comprises the steps of:(a) reacting Na(C.sub.5 H. |
| 5144053 |
Aluminum alkyls and linear 1-olefins from internal olefins |
September 1, 1992 |
| Linear 1-olefins are prepared from internal olefins by (i) reacting them in the presence of an isomerization catalyst and a tri-lower alkyl aluminum so as to cause internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in whic |
| 5124465 |
Aluminum alkyls and linear 1-olefins from internal olefins |
June 23, 1992 |
| Linear 1-olefins are prepared from internal olefins by (i) reacting them in the presence of an isomerization catalyst and a tri-lower alkyl aluminum so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in |
| 5003100 |
Method of producing polysilane compounds |
March 26, 1991 |
| Improved methods for producing silanes using phosphorous rhodium dimer catalysts. |
| 4918254 |
Nickel catalyzed displacement reaction |
April 17, 1990 |
| Alkyl groups in trialkyl aluminum are displaced by .alpha.-olefins in the presence of a nickel catalyst. The displaced alkyl group evolve as .alpha.-olefins. The displacement is fast and the catalyst is then poisoned with a catalyst poison such as lead to prevent undesired side react |
| 4754097 |
Metathesis of acetylenes |
June 28, 1988 |
| Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes and metathesizable functionally substituted alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a Group VI-B metal compound having |
| 4704377 |
Metathesis of acetylenes |
November 3, 1987 |
| Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes and metathesizable functionally substituted alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a Group VI-B metal compound having |
| 4698451 |
Dirhenium metathesis catalysts |
October 6, 1987 |
| Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a dirhenium halide having (a) a double or triple bond between a pair of rhenium atoms, |
| 4364874 |
Method of making aluminum alkyls |
December 21, 1982 |
| A method of making aluminum alkyls utilizing an uncatalyzed exchange reaction wherein an aluminum trialkyl is reacted with an alkyl iodide in which the alkyl group differs from at least one of the alkyl groups of the aluminum trialkyl to form an aluminum trialkyl having the alkyl radical |
| 4364873 |
Method of making aluminum alkyls |
December 21, 1982 |
| A method of making trimethylaluminum wherein a trialkylaluminum having at least two carbon atoms in the alkyl group is reacted with a methyl halide in the presence of a vanadium-based catalyst to form trimethylaluminum and an alkyl halide. |
| 4364872 |
Method of making aluminum alkyls |
December 21, 1982 |
| A method of making trimethylaluminum wherein an aluminum trialkyl having at least two carbon atoms in the alkyl group is reacted with a methyl halide in the presence of a bismuth catalyst to form trimethylaluminum and an alkyl halide. A hydrocarbon solvent provides increased reaction rat |
