The Dow Chemical Company

Dow Global Technolgoies LLC

Hendrik E Tuinstra

James C Stevens

Francis J Timmers

Duane R Romer

David D Devore

Richard E Campbell, Jr

Paul C Vosejpka

Daryoosh Beigzadeh

Cynthia L Rand

Harold D Myers

Michael J Mullins

Edmund P Woo

Robert G Bowman

George E Hartwell

Robert K Rosen

Howard W Clark

Thomas A Chamberlin

Garmt R Meima

Alex Kuperman

Brian John Schoeman

Edmond P Woo

Jr Richard E Campbell

A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and 1-octene and a polymerization process using the polymerization modifier.

Polymerization modifiers

A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and propylene and a polymerization process using the polymerization modifier.

A combinatorial method for identifying a catalyst composition for use in the homogeneous addition polymerization of an olefin monomers, said catalyst composition comprising a transition metal compound, a cocatalyst and a polymerization modifier, as well as catalyst compositions and improved olefin polymerization processes resulting therefrom.

Technique for selecting polymerization modifiers cross reference statement

Catalyst compositions that are highly tolerant of catalyst poisons for use in addition polymerizations comprising a catalytic derivative of a Group 4 metal complex, a cocatalyst, and a Group 13 metal amide compound.

Olefin polymerization catalyst composition comprising group 13 amide derivatives

A process and catalyst for the hydro-oxidation of an olefin having three or more carbon atoms, such as propylene, to form an olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and a catalyst. The catalyst contains oxidized gold dispersed on a titanium-containing support, preferably, a support having a plurality of titanium coordination environments, for example, titanium grafted onto a titanosilicate. Selectivity to olefin oxide is high at good conversion of the olefin. The catalyst uses hydrogen efficiently and exhibits a long lifetime.

Process for the hydro-oxidation of olefins to olefin oxides using oxidized gold catalyst

A process for the preparation of an aromatic carbonate or polycarbonate from a phenol or bisphenol, methanol, carbon monoxide and oxygen comprising the steps of 1) reacting phenol or bisphenol with acetic anhydride to form (bis)phenyl acetate; 2) reacting dimethyl carbonate with (bis)phenyl acetate from step 1 to produce a phenyl carbonate or polycarbonate and methyl acetate; and 3) reacting the methyl acetate with carbon monoxide to produce acetic anhydride for use in step 1. In a desirable embodiment the dimethyl carbonate may also be prepared by reaction of methanol, carbon monoxide and oxygen.

Process for the preparation of phenyl carbonates or polycarbonates

A process for the preparation of a polycarbonate comprising reacting a diaryl carbonate with a bisphenol to produce a polycarbonate and a phenol, regenerating the diaryl carbonate by reacting the phenol byproduct with a carbonyl halide, and optionally recycling the hydrogen halide using a metal Redox captive halogen swing reactor system.

Process for the preparation of polycarbonates

Preparation of polycarbonates comprising separating bisphenol,

Aromatic carbonates useful for the preparation of high molecular weight polycarbonate resins are prepared by reacting methanol, carbon monoxide and oxygen to prepare dimethyl carbonate; reacting a methyl silyl ether with a phenol or bisphenol to prepare an aryl silyl ether, and reacting the dimethyl carbonate and aryl silyl ether to prepare an aromatic carbonate.

Preparation of aromatic carbonates

Process for forming arylether polymers

Method and apparatus for determining various molecular weight distribution parameters by concurrent measurement of hydrodynamic volume, specific viscosity and mass. Essentially concurrent viscosity and mass detectors are described, as are improved methods for viscosity detection, which together provide substantially improved results.

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Midland, MI, United States of America

Hendrik E Tuinstra