Abstract:
Katalysatorformkörper für die selektive Reduktion von in Abgasen enthaltenen Stickoxiden mit Ammoniak, die als katalytisch aktive Komponenten die Verbindungen des Vanadins, Molybdäns und/oder Wolframs enthalten, die durch Tränken auf einen Träger aufgebracht worden sind, werden dadurch hergestellt, daß zumindest eine der aktiven Komponenten in Form eines Sols auf den vorgeformten Träger aufgebracht wird.
Abstract:
This invention relates to an unsaturated halohydrocarbon such as vinylidene chloride produced by the dehydrohalogenation of haloalkanes such as 1,1,1-trichloroethane or 1,1,2-trichloroethane, by contacting the haloalkane with a Group IA metal halide and a Group IIA or IIB metal oxide or metal hydroxide, together supported on a porous carrier material, under reaction conditions sufficient to form the corresponding unsaturated hydrocarbon and a Group IIA or IIB metal halide. The Group IIA or IIB metal oxide or metal hydroxide may be regenerated by contacting the Group IIA or IIB metal halide with an alkanol or water. In one embodiment, the process is initiated by contacting a novel catalyst comprising a Group IA metal cation such as Cs, a Group IIA or IIB metal cation such as Mg and a neutralizing number of halide anions such as chloride distributed on a support such as silica, with water or an alkanol under reaction conditions sufficient to form the Group IA metal halide and the Group IIA or IIB metal oxide or metal hydroxide supported on a porous carrier material. The process of the invention is also useful for the dehydrohalogenation of alkylene halohydrins to produce alkylene oxides. The process of the invention may be carried out in a riser reactor system, whereby the reactants are cycled in a continuous process. The novel catalyst is highly selective, has high catalytic capacity and does not rapidly deactivate in typical dehydrohalogenation reactions when used in the presence of an alkanol and oxygen.
Abstract:
A thickened organic composition containing a first organophilic clay which will increase the viscosity of the composition and a second organophilic clay which is different from the first and which will impart biocidal activity to the composition. The second organophilic clay is the reaction product of a smectite-type clay and an organic cation having a benzyl group and a long chain alkyl group. The first and second organophilic clays can be mixed into the organic composition as and additive and may be prepared by using a mixture of cations.
Abstract:
A thickened organic composition containing a first organophilic clay which will increase the viscosity of the composition and a second organophilic clay which is different from the first and which will impart biocidal activity to the composition. The second organophilic clay is the reaction product of a smectite-type clay and an organic cation having a benzyl group and a long chain alkyl group. The first and second organophilic clays can be mixed into the organic composition as and additive and may be prepared by using a mixture of cations.
Abstract:
The present invention provides a catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising support material particles; at least some of the support material particles are rhodium-supporting support material particles having rhodium supported thereon at a concentration of from 0.001 to 3.5 wt.%, based on the weight of the rhodium-supporting support material particle; and the rhodium is present at a loading of up to 20 g/ft3 relative to the first catalytic region.