The Dow Chemical Company

Dow Global Technolgoies LLC

Other

Richard A Pierce

Howard W Clark

Lin Luo

Susan B Domke

Matthew T Pretz

Andrzej Malek

Brien A Stears

Mark William Stewart

Tipton T Masterson

Albert E Schweizer, Jr

Isa K Mbaraka

Duncan Paul Coffey

Guido Capone

David A Wilson

Michael M Olken

David A Grilli

Robert T Jernigan

Simon J Hamper

William M Castor

Phillip W Dellinger

Andrzej M Malek

Mark W Stewart

Jr Albert Schweizer

Increase propane dehydrogenation activity of a partially deactivated dehydrogenation catalyst by heating the partially deactivated catalyst to a temperature of at least 660&#xb0; C., conditioning the heated catalyst in an oxygen-containing atmosphere and, optionally, stripping molecular oxygen from the conditioned catalyst.

Reactivating propane dehydrogenation catalyst

A supported catalyst and process for dehydrogenating a hydrocarbon, the catalyst comprising a first component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium, and compounds thereof; a second component selected from the group consisting of metals of Group 8 of the Periodic Table of the Elements and compounds thereof, and a support comprising alumina in the gamma crystalline form. The catalysts are especially active and efficient when employed in concurrent flow in a dehydrogenation reactor having an average contact time between the hydrocarbon and catalyst of from 0.5 to 10 seconds.

Dehydrogenation process and catalyst

An integrated process of preparing a Calkenyl-substituted aromatic compound using a Caromatic compound and a Calkane as raw materials. The process involves feeding a Calkane, for example ethane, and a Calkyl-substituted aromatic compound, for example ethylbenzene, to a dehydrogenation reactor for concurrent dehydrogenation to a Calkene, for example ethylene, and a Calkenyl-substituted aromatic compound, for example stryrene; separating the dehydrogenation effluent to recover a gaseous stream containing alkene, hydrogen, and alkane, and to recover the aromatics with high efficiency; feeding the gas stream and a Caromatic compound to an alkylation reactor to obtain the corresponding Calkyl-substituted aromatic compound, which is recycled to the dehydrogenation reactor; subjecting the alkylation unit vent stream containing alkane and hydrogen to a separation step to recover alkane, which is recycled to the dehydrogenation unit; hydrogen, which is recovered at 99% chemical grade purity and energy.

Integrated process for producing an alkenyl-substituted aromatic compound

A foot positioning training aid for training and instructing individuals in the proper positioning of their feet when engaged in various activities in which the position and movement of the feet are critical to proper execution of desired functions. The training aid includes a generally rectangular panel which can be supported on various supporting surfaces and is provided with a raised rear edge portion and raised side edge portions to position the feet but not form barriers to movement. The side edges of the training include progress numerical indicia and VELCRO alongside of the indicia together with positionable indicators on the VELCRO to provide indicators for initial position of the feet and also indicators to indicate movement or secondary positions of the feet for optimum performance of certain functions.

Foot positioning training aid

Cement compositions having better and longer lasting workability have been made by adding to said compositions a polymer or copolymer of a hydroxyalkyl(meth)acrylate, e.g. hydroxyethyl acrylate or methacrylate. Further improvement is achieved by adding a water reducer, e.g. sulfonated polystyrene, and an antifoam agent, e.g. a polyalkylenepolyol.

Workable cement composition of low water content containing a

Sulfonated copolymers of styrene alpha-methylstyrene are added to cement compositions to improve the workability and strength characteristics of the concrete, mortar or grout product derived therefrom.

High efficiency superplasticizer comprising a sulfonated copolymer of

The reaction product of phosphorous acid, formaldehyde, and monomeric or polymeric alkoxysilanes having one or more aminoalkylene groups are useful as gelation inhibitors for aqueous glycol solutions.

Silicone reaction products and glycol compositions containing the

Polyalkylhydrosiloxanes that are soluble in glycol are used to stabilize antifreeze/coolant formulations that contain inorganic silicate corrosion inhibitors. The stabilizers have the following formula

Polyalkylhydrosiloxanes as inorganic silicate stabilizers

Growing community of inventors

Lake Jackson, TX, United States of America

Richard A Pierce