Phillips Petroleum Company

Crompton Gmbh

Witco Corporation

Other

Ck Witco Corporation

Ted M Pettijohn

Henry L Hsieh

William K Reagen

Syriac J Palackal

Peter Frenkel

Jeffrey W Freeman

M Bruce Welch

Rolf L Geerts

Mark E Lashier

Elizabeth Ann Benham

Helmut G Alt

Gil R Hawley

Darryl R Fahey

Bernd Peifer

Gary L Glass

Kenneth Farmer

Shirley J Martin

Brian K Conroy

Robert M Infield

Kevin J Hess

Lawrence R Brecker

Delphine Nwoko

Phosphomolybdic acid and partial alkali salts of phosphomolybdic acid are used as stabilizers for aqueous hydrogen peroxide.

Phosphomolybdic acid stabilizer for hydrogen peroxide

Preparation of di-t-alkyl peroxides and t-alkyl hydroperoxides from n-alkyl ethers

The process of preparing peroxyketals which comprises reacting a composition comprising ketone with hydroperoxide in the presence of heteropolyacid.

Preparation of peroxyketals

The present invention provides polymers of ethylene having ethyl branches, a narrow molecular weight distribution, no substantial amount of branches longer than any comonomer employed in the polymerization, and an unusually low branching to density ratio. In one embodiment the polyethylenes are substantially free of any branches having more than 2 carbon atoms, i.e. ethyl branches, and the molar percent of ethyl branches is substantially the same for molecular fractions across the molecular weight distribution. In another embodiment the polyethylenes have other branches having 3 or more carbons and the molar percent of the ethyl branches is substantially the same for molecular fractions across the molecular weight distribution.

Polyethylenes containing a unique distribution of short chain branching

A method of (co)polymerizing vinyl and/or diene monomers comprising contacting the monomers with a (co)polymeriztion composition under conditions effective to (co)polymerize the monomers, wherein the (co)polymerization composition comprises: (a) an organic peroxide component, and (b) a heteropoly acid, in an amount effective to lower the onset temperature of decomposition of the organic peroxide component with the proviso that if the heteropoly acid is phosphomolybdic acid the organic peroxide is not a peroxydicarbonate.

Methods of (co)polymerizing vinyl and/or diene monomers and curing or

The process of preparing geminal dihydroperoxy alkyl peroxides and 1,1-dihydroperoxydialkyl peroxides, which comprises reacting an aqueous composition comprising a ketone with hydrogen peroxide in the presence of a heteropolyacid.

Heteropolyacids as catalysts for a synthesis of ketone peroxides

The invention disclosed involves the use of heteropoly acids as promoters to decompose organic peroxides.

Heteropoly acid peroxide promoter

Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or chromium pyrrolide, compounds can be used either unsupported or supported on an inorganic oxide support, with a metal alkyl and an unsaturated hydrocarbon, to trimerize, oligomerize, and/or polymerize olefins.

Chromium compounds and uses thereof

Novel chromium-containing compounds are prepared by forming a mixture of a chromium salt, a metal amide, and an ether. These novel chromium-containing, or chromium pyrrolide, compounds, with a metal alkyl and an unsaturated hydrocarbon, can be used as a cocatalyst system in the presence of an olefin polymerization catalyst system to produce a comonomer in-situ. The resultant polymer, although produced from predominately one monomer, has characteristics of a copolymer.

Process for olefin polymerization

A process is provided comprising: (a) contacting a hydrocarbyl lithium with an alkali metal hydrocarbyloxide in the presence of an aromatic compound; and thereafter (b) recovering an aromatic alkali metal compound; and thereafter (c) contacting said aromatic alkali metal compound with an alpha-olefin. Optionally, a catalytic support is also present during steps a, b, and c.

Aromatic alkali metal alkene addition process

A composition, which can be used as catalyst for producing an olefin polymer having a multimodal molecular weight distribution, is provided that comprises a transition metal-containing catalyst, a metallocene, and a boron-containing organoaluminoxane, wherein each component of the composition is present in an effective amount so that an olefin polymer having a multimodal molecular weight distribution can be produced using the composition as catalyst, preferably in the presence of a cocatalyst. Also provided is a process for preparing the composition which comprises: (1) contacting a transition metal-containing catalyst with an organoaluminoxane dispersed in a solvent to form a slurry; (2) combining the slurry with a boroxine to prepare a combination of a transition metal-containing catalyst and boron-containing organoaluminoxane; and (3) contacting the combination with a metallocene. Further provided is a process for polymerizing an olefin to prepare an olefin polymer using the composition.

Compositions useful for olefin polymerization and processes therefor and

A catalyst system comprising a bridged fluorenyl-containing metallocene, an unbridged metallocene, and a suitable cocatalyst and the use of such catalyst systems to produce olefin polymers. Also novel olefin polymers produced by those processes.

Process for producing broad molecular weight polyolefin

In accordance with the present invention, there is provided catalyst systems and processes for preparing such catalyst systems comprising reacting a metallocene compound, a solid organoaluminoxy product, and an organometal compound. Further there is provided processes for the polymerization of olefins using the catalyst systems.

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Bartlesville, OK, United States of America

Ted M Pettijohn