Abstract:
This invention provides a process for producing a fluoroolefin comprising reacting, in a vapor phase, a fluorinating agent and a chlorine-containing alkene or a chlorine-containing alkane in the presence of at least one catalyst selected from the group consisting of chromium oxide containing a Group 5 element and fluorinated chromium oxide containing a Group 5 element. According to the process of the present invention, the target fluoroolefin can be obtained with high starting material conversion and good selectivity.
Abstract:
The exhaust gas purification catalyst disclosed herein is provided with a substrate 10 and a catalyst coating layer 30 that is formed on the surface of the substrate 10. The catalyst coating layer 30 is formed into a layered structure having upper and lower layers, with a lower layer 50 being closer to the surface of the substrate 10 and an upper layer 40 being relatively farther therefrom. The catalyst coating layer 30 is provided with Rh and Pd as precious metal catalysts and is provided with an OSC material having an oxygen storage capacity as a support. The Rh is disposed in the upper layer 40 of the catalyst coating layer 30, and the Pd is disposed in both the upper layer 40 and the lower layer 50 of the catalyst coating layer 30. At least a portion of the Pd in the upper layer 40 and in the lower layer 50 is supported on the OSC material. The mass ratio of the Pd disposed in the upper layer 40 to the Pd disposed in the lower layer 50 is not more than 0.4.
Abstract:
Disclosed is a carbon fiber containing a catalyst, in which the catalyst comprises a combination of the elements Co-V-Mo supported on a carrier, as well as a composite material comprising the carbon fiber.
Abstract:
Alumina support compositions comprising at least 0.1 wt % of silica are disclosed. The alumina support are characterized by a pore volume of greater than 0.60 cc/g, a median pore size ranging from about 70 to about 120, a pore size distribution such that at least 90% of the total pore volume falls within the range of about 20 to about 250, and a pore size distribution width of no less than about 40. Alumina compositions of the present invention exhibit a primary peak mode at a pore diameter less than the median pore diameter. Also provided are catalysts made from the alumina supports, and processes of preparing and using the supports and catalysts.
Abstract:
L'invention concerne un procédé de conversion d'une charge paraffinique constituée par des hydrocarbures ayant un nombre d'atomes de carbone compris entre 9 et 25, ladite charge paraffinique étant produite à partir de ressources renouvelables, à l'exclusion des charges paraffiniques obtenues par un procédé mettant en jeu une étape de valorisation par la voie Fischer-Tropsch, ledit procédé mettant en oeuvre un catalyseur comprenant au moins un métal hydro-déshydrogénant choisi dans le groupe formé par les métaux du groupe VIB et du groupe VIII de la classification périodique, pris seuls ou en mélange et un support comprenant au moins une zéolithe Nu-10 et au moins une silice alumine, ledit procédé étant effectué à une température comprise entre 150 et 500°C, à une pression comprise entre 0,1 MPa et 15 MPa, à une vitesse spatiale horaire comprise entre 0,1 et 10 h -1 et en présence d'une quantité totale d'hydrogène mélangée à la charge telle que le ratio hydrogène/charge soit compris entre 70 et 2000 Nm 3 /m 3 de charge.
Abstract:
A catalyst for the reforming of hydrocarbon-comprising compounds with CO 2 , water and/or hydrogen, a process for producing the same, and a process using the same for the reforming of the hydrocarbon-comprising compounds are provided. The production of the catalyst is based on contacting, intimately mixing and thermal treating of a hydrotalcite-comprising starting material with a fusible metal salt, which more preferably comprises nickel nitrate hexahydrate, to result in the metal salt melt. After molding and shaping, the compounds are subjected to high-temperature calcination step. In addition, the process using the catalyst for the reforming of the hydrocarbon-comprising compounds is carried out in a temperature range from 500 to 1100 °C at a pressure in the range from 2 to 70 bar. The catalyst is distinguished from the prior art by physicochemical properties.
Abstract:
The invention pertains to a production process (2) of a solid catalyst material (7) using a solid material (8), having at least one pore or at least one cavity, the pore or the cavity having one diameter of less than 1 µm, which is exposed to a metal complex (15, 15') entering the pore or cavity, wherein the solid material (8, 8') is impregnated with metal by steps of adsorption of the metal complex (15, 15') in the pore or in the cavity of the solid material (8, 8'), and decomposition of the metal complex (15, 15') by means of oxidation, wherein metal from the metal complex (15, 15') is attached to a surface of the solid material (8, 8'). The metal is bond to the surface of the solid material (8, 8') at least in part along the pore or the cavity. At least some of the structures enclosing the pore or the cavity bind metal dispersed as monomeric species or dimeric species of metal or metal bound to the oxidizing gas (17, 17'), whereby all monomeric species exceed all oligomeric species by number. Further, the invention relates to an apparatus for production of a solid catalyst material (7).
Abstract:
The invention is directed to a catalyst for the gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene with HF to give 1-chloro-2,2-difluoroethane which catalyst is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina, or co-depositing Cr(NO3)3 and Ni(NO3)2 on active carbon, or by doping alumina with ZnCl2, and to a process for the preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene wherein one of the catalysts according to claim 2 or 3 is used.