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

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

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

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

Abstract: 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.

Abstract: 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.

Abstract: An integrated process of preparing a C2-5 alkenyl-substituted aromatic compound using a C6-12 aromatic compound and a C2-5 alkane as raw materials.

Abstract: An integrated process of preparing a C2-5 alkenyl-substituted aromatic compound using a C6-12 aromatic compound and a C2-5 alkane as raw materials.

Abstract: The invention relates to a ball pitching machine having a ball feed means for feeding balls to a feeding point where they will be acted upon by rotating drive wheels, a plurality of at least two drive wheels having planes and axes of rotation, said axes of rotation being perpendicular to said planes, said wheels being disposed about said feeding point so as to simultaneously act on a fed ball imparting to the fed ball spin and a forward velocity and trajectory, outwardly away from the feeding point in a direction initially perpendicular to the axes of rotation and in the plane of the wheels. The rotating means is constructed for rotating each drive wheel independent of other drive wheels at a plurality of preselected rotational speeds thereby effecting a type of pitched ball having a predetermined trajectory. A tilting means is provided for altering the trajectory, upwardly or downwardly, in a vertical plane, coplaner with the plane of the drive wheels.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Polyalkylhydrosiloxanes that are soluble in glycol are used to stabilize antifreeze/coolant formulations that contain inorganic silicate corrosion inhibitors. The stabilizers have the following formulaMe.sub.3 Si--O--[Si(Me).sub.2 --O].sub.x --[SiHMe--O].sub.y --SiMe.sub.3where the ratio of x to y is from 0 to about 10.