Abstract: A catalyst system for the polymerization of olefins is disclosed which comprises a metallocene component, for example, organometallic coordination compounds of a Group IVB or Group VB hydrolysis products comprising methane and C.sub.2 or higher alkanes, such as isobutane, n-butane or n-hexane.
Abstract: A catalyst component, adapted for use in the polymerization and copolymerization of ethylene, is formed by reaction of an organomagnesium compound and a tetraaalkyl silicate, contact of the resulting product with a chlorinating reagent, and treatment of the product from the previous step with liquid titanium halide.
Abstract: Copper alkoxy alkoxides of the formula CuOR or Cu(OR).sub.2, where R is derived from an alkoxy alkanol of from 3 to 8 carbon atoms, are superconducting ceramic precursors. They can be formed by reacting an alkoxy alkanol with a copper alkoxide. Compositions containing theser alkoxides solubilized in an organic solvent, such as toluene, can be prepared by the additional use of a barium alkoxide solubilization agent.
Type:
Grant
Filed:
April 7, 1989
Date of Patent:
October 22, 1991
Assignee:
Texas Alkyls, Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass
Abstract: Aluminoxanes can be produced by contacting an organic solvent containing a trialkylaluminum compound with an atomized spray of water. If desired, a pore-formed aluminoxane can be present as a reaction moderator.
Type:
Grant
Filed:
June 8, 1990
Date of Patent:
August 20, 1991
Assignee:
Texas Alkyls, Inc.
Inventors:
Dennis L. Deavenport, James T. Hodges, III., Dennis B. Malpass, Nam H. Tran
Abstract: Methylaluminoxane can be formed by the reaction of a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with trimethylaluminum with the trimethylaluminum being present in an amount which is not present in stoichiometric excess. Another embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of a trialkylaluminum compound or a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with water to form a polyalkylaluminoxane with is then reacted with trimethylaluminum. A third embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of the aforementioned polyalkylaluminoxane with trimethylaluminum and then with water.
Abstract: Trimethylaluminum can be formed by reacting a methylaluminum chloride, such as dimethylaluminum chloride, with sodium in the presence of an effective amount of an alkali or alkaline earth metal fluoride (e.g., sodium fluoride) to enhance the reaction.
Type:
Grant
Filed:
October 31, 1990
Date of Patent:
May 14, 1991
Assignee:
Texas Alkyls, Inc.
Inventors:
Nam H. Tran, Dennis L. Deavenport, Curtis W. Post
Abstract: Methylaluminoxane can be formed by the reaction of a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with trimethylaluminum with the trimethylaluminum being present in an amount which is not present in stoichiometric excess. Another embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of a trialkylaluminum compound or a tetraalkyldialuminoxane containing C.sub.2 or higher alkyl groups with water to form a polyalkylaluminoxane which is then reacted with trimethylaluminum. A third embodiment of the present invention involves the synthesis of the methylaluminoxane by reaction of the aforementioned polyalkylaluminoxane with trimethylaluminum and then with water.
Abstract: Adducts of a trialkylaluminum or a dialkylaluminum hydride and diisoalkenyl benzene compounds have been discovered. Catalyst components for the polymerization of olefins have also been developed which comprise, as the cocatalyst, the reaction product of a trialkylaluminum or a dialkylaluminum hydride (e.g., diisobutylaluminum hydride) and an alkenyl-substituted benzene (e.g., diisopropenyl benzene).
Type:
Grant
Filed:
September 30, 1988
Date of Patent:
March 20, 1990
Assignee:
Texas Alkyls, Inc.
Inventors:
Dennis B. Malpass, Michael J. Breen, Loyd W. Fannin
Abstract: Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium amides are described. The magnesium amide moiety is derived from an amine (e.g., an N-heterocyclic amine). The complexes can be formed by reaction between a magnesium alkyl and a mixture of aliphatic alcohols and an amine.
Type:
Grant
Filed:
June 7, 1988
Date of Patent:
February 27, 1990
Assignee:
Texas Alkyls, Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass
Abstract: Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl oxides are described. The magnesium aryl oxide moiety is derived from a hindered aromatic alcohol. The complexes can be formed by reaction between a magnesium alkyl and a mixture of aliphatic alcohols and a hindered aromatic alcohol.
Type:
Grant
Filed:
July 5, 1988
Date of Patent:
December 5, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass
Abstract: Equipment which is contaminated with an organometallic residue is treated with gaseous carbon dioxide to react with the organometallic compounds contained in the equipment.
Abstract: Compounds of the formula ##STR1## where R is alkyl, R' is independently selected from alkyl and aryl, and n ranges from 1 to 8 are useful as coupling agents in filled polymer compositions, e.g., in filled, polar polymers such as polybutylene terephthalate.
Type:
Grant
Filed:
July 19, 1988
Date of Patent:
October 24, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Dennis B. Malpass, Kelly B. Triplett, Andrzej M. Piotrowski
Abstract: Aluminum-containing compositions for use particularly as olefin polymerization or copolymerization cocatalysts are produced by reaction of trialkylaluminums or dialkylaluminum hydrides with 1,3- or 1,4-pentadiene at a mole ratio of aluminum compound to pentadiene of approximately 1:1, with removal during the reaction of evolved olefin.
Type:
Grant
Filed:
October 11, 1988
Date of Patent:
July 25, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Dennis B. Malpass, Loyd W. Fannin, Michael J. Breen
Abstract: Ketones or aldehydes are methylenated to form the corresponding olefin by reaction with a bis(alkylchloroalumino)methane, e.g., in the form of its dietherate.
Type:
Grant
Filed:
September 2, 1988
Date of Patent:
July 18, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass
Abstract: Copper alkoxy alkoxides of the formula CuOR or Cu(OR).sub.2, where R is derived from an alkoxy alkanol of from 3 to 8 carbon atoms, are superconducting ceramic precursors. Compositions containing these alkoxides solubilized in an organic solvent, such as toluene, can be prepared by the additional use of a barium alkoxide solubilization agent.
Type:
Grant
Filed:
December 7, 1987
Date of Patent:
July 11, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass
Abstract: Dimethylzinc is prepared by heating a dimethylaluminum halide, e.g., dimethylaluminum chloride, and a dialkylzinc, e.g., diethylzinc, with distillative removal of dimethylzinc from the reaction mixture which results therefrom.
Type:
Grant
Filed:
August 19, 1988
Date of Patent:
June 20, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Scott H. Eidt, Dennis L. Deavenport, Nam H. Tran
Abstract: Aluminum alkyl vapor is removed from a gas stream by scrubbing with a hydrocarbon scrubbing liquid containing a long chain carboxylic acid dissolved therein.
Type:
Grant
Filed:
March 10, 1988
Date of Patent:
May 2, 1989
Assignee:
Texas Alkyls, Inc.
Inventors:
Loyd W. Fannin, Dennis B. Malpass, John R. Rohrer
Abstract: Ketones are methylenated to form the corresponding olefin by reaction with a bis(alkylchloroalumino)methane, e.g., in the form of its dietherate.
Type:
Grant
Filed:
November 5, 1987
Date of Patent:
November 29, 1988
Assignee:
Texas Alkyls Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass
Abstract: Ketones are alkylenated to form the corresponding olefin by reaction with a bis(substituted alumino)substituted methane, e.g., in the form of its dietherate.
Type:
Grant
Filed:
November 5, 1987
Date of Patent:
November 29, 1988
Assignee:
Texas Alkyls Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass, John J. Eisch, Marek P. Boleslawski
Abstract: A process for the synthesis of bis(dichloroalumino)methane, with a lessened danger of runaway reaction, entails the gradual addition of methylene bromide to a heated mixture of aluminum and methylene chloride. An aluminum alkyl activator is also advantageously present as a scavenger for moisture and oxygen to prevent undesired oligomer formation.
Type:
Grant
Filed:
November 5, 1987
Date of Patent:
November 15, 1988
Assignee:
Texas Alkyls, Inc.
Inventors:
Andrzej M. Piotrowski, Dennis B. Malpass