The Dow Chemical Company

Dow Global Technolgoies LLC

Robert J Gulotty, Jr

Heiko Weiner

Stephen E Bales

David E Laycock

Kendra L Flagler

David J Brennan

Muthiah N Inbasekaran

Dean M Millar

Mark D Newsham

Mark E Jones

David Craig Molzahn

Joseph E Pelati

Michael N Mang

Daniel A Hickman

David Gordon Barton

Adam Chojecki

Mark McAdon

Anthony P Haag

Raymond M Collins

Albert E Schweizer, Jr

Daniela Ferrari

Gerolamo Budroni

Palanichamy Manikandan

Dennis W Smith, Jr

Neelesh J Rane

Arthur R Prunier

Catalyst compositions for producing mixed alcohols from a synthesis gas feed. The catalyst composition comprises a catalytic metal combination on a catalyst support, a first optional promoter and a second optional promoter, where the catalytic metal combination consists essentially of iridium, vanadium, and molybdenum.

Catalyst compositions for producing mixed alcohols

A process for preparing a molybdenum sulfide-based catalyst comprises drying a precipitated molybdenum sulfide-based catalyst precursor, for example, a wet filter cake, such that a particulate catalyst precursor, containing from 12 to 15 percent by weight water, is formed. The particulate catalyst precursor is desirably in the form of free-flowing particles. The particulate catalyst precursor is then auto-reduced. A rotary furnace that subjects the catalyst precursor to at least two zones having distinct temperatures may be conveniently used for drying, auto-reduction, or both. The staged drying and auto-reduction steps reduce the tendency of the precursor to self-heat, which is undesirable because it reduces both the activity and selectivity of the final catalyst.

Process for synthesis of molybdenum sulfide-based catalysts

The present disclosure relates to compositions, systems, and methods of forming an amine (e.g., methylenedianiline (MDA)) using an acid catalyst including, for example, a metal oxide-silica catalyst calcined at temperature(s) of about &#x2267;500&#xb0; C. to form a solid acid silica-metal oxide catalyst. A metal oxide of a solid acid silica-metal oxide catalyst may comprise alumina. A process for making a solid acid silica-metal oxide catalyst may comprise calcining an amorphous alumina-silica material at temperature(s) of about &#x2267;500&#xb0; C. and/or under an anhydrous and/or inert atmosphere. A rearrangement reaction of the condensation product of aniline and formaldehyde in the presence of a solid acid silica-metal oxide catalyst may yield more MDA and/or more desirable isomer(s) of MDA than reactions performed with a corresponding catalyst calcined at temperature(s) of less than 500&#xb0; C.

Production of mixtures of methylenedianiline and its higher homologues using calcined metal oxide-silica catalysts

An oxidative halogenation process involving contacting a hydrocarbon, for example, ethylene, or a halogenated hydrocarbon with a source of halogen, such as hydrogen chloride, and a source of oxygen in the presence of a catalyst so as to form a halocarbon, preferably a chlorocarbon, having a greater number of halogen substituents than the starting hydrocarbon or halogenated hydrocarbon, for example, 1,2-dichloroethane. The catalyst is a novel composition comprising copper dispersed on a porous rare earth halide support, preferably, a porous rare earth chloride support. A catalyst precursor composition comprising copper dispersed on a porous rare earth oxyhalide support is disclosed. Use of the porous rare earth halide and oxyhalide as support materials for catalytic components is disclosed.

Oxyhalogenation process using catalyst having porous rare earth halide support

Metal &lsqb;hexacyanocobaltate, cobalthexanitrite nitroferricyanide&rsqb; complexes are useful alkylene oxide polymerization catalysts. The metal is any that forms a precipitate with the hexacyanocobaltate, cobalthexanitrite and nitroferricyanide groups. These catalysts are made from less expensive raw materials than the common zinc hexacyanocobaltate catalysts, and provide short induction periods and many cases more controlled exotherms. In addition, the metal &lsqb;hexacyanocobaltate, cobalthexanitrite nitroferricyanide&rsqb; catalysts often provide poly(propylene oxide) polymers having very low unsaturations, even when the catalyst is complexed with a complexing agent such as glyme.

Complexing agent-modified trimetal cyanide catalyst

Metal hexacyanocobaltate nitroferricyanide catalysts are active polymerization catalysts for alkylene oxides. These catalysts tend to have short induction periods, followed by rapid polymerization of alkylene oxides to polyethers.

Metal hexacyanocobaltate nitroferricyanide complexes

Metal &lsqb;hexacyanometallate hexanitrometallate&rsqb; complexes are useful alkylene oxide polymerization catalysts. The metal is any that forms a precipitate with hexacyanometallate and hexanitrometallate groups. These catalysts are made from less expensive raw materials than the common zinc hexacyanocobaltate catalysts, and provide short induction periods and in many cases more controlled exotherms.

Complexing agent-modified hexacyanometallate hexanitrometallate catalysts

The present invention relates to crosslinkable thermoplastic compositions comprising a plurality of crosslinkable moieties, capable of undergoing addition polymerization, incorporated by functionalization of the precursor poly(hydroxy ethers). The poly(hydroxy ethers) comprise recurring moieties derived from aromatic dihydroxy compounds. The crosslinkable polymeric compositions are crosslinked to obtain crosslinked thermoset polymeric compositions of the invention. The polymeric compositions of the inventions can be suitably used either as an active guiding layer, and/or as a NLO active upper and lower cladding layers in an electro-optic device. The polymeric compositions can also be used as non-NLO polymers for the upper and lower cladding layers, prior to orientation by the application of an electric field.

Crosslinkable thermoplastic and crosslinked thermoset nonlinear optical

Disclosed are compounds containing substituted pyrazoline which exhibit nonlinear optical activity on orientation and to oriented polymeric compositions comprising moieties derived therefrom in the backbone of the polymer. Also disclosed are the processes for making the oriented polymeric composition of the invention.

Nonlinear optically active pyrazolines and polymeric compositions

The present invention relates to nonlinear optical material comprising nonlinear optical dihydroxy arylhydrazones and to nonlinear optical materials comprising compositions containing at least one divalent moiety of nonlinear optical arylhydrazones. The present invention also relates to polyesters, polyestercarbonates, polycarbonates, polyethers, and poly(hydroxy ether) polymers, incorporating the dihydroxy arylhydrazone as recurring divalent moieties in the backbone of the polymer. The polymeric compositions of the present invention have high glass transition temperatures and exhibit stable nonlinear optical activity at high temperatures over a period of time.

Nonlinear optical arylhydrazones and nonlinear optical polymers thereof

This invention provides thermoplastic polymeric materials comprising polycarbonate and polyestercarbonte resins and oriented polymeric compositions thereof which exhibit nonlinear optical properties.

Thermoplastic compositions with nonlinear optical activity

This invention provides thermoplastic polymeric materials comprising polycarbonate and polyestercarbonate resins and oriented polymeric compositions thereof which exhibit nonlinear optical properties.

Growing community of inventors

Midland, MI, United States of America

Robert J Gulotty, Jr