Abstract:
The present invention relates to a photocatalyst for the generation of diatomic hydrogen from a hydrogen containing precursor under the influence of actinic radiation comprising a semiconductor support and a gold and palladium alloy on said semiconductor support. The present invention further relates to a method for generating diatomic hydrogen by photolysis and a photolysis system.
Abstract:
The invention relates to a process comprising: reacting isobutyraldehyde with an aqueous solution of urea in the presence of a phase transfer catalyst to form isobutylidene diurea. Preferably, the phase transfer catalyst is a quaternary ammonium salt, more preferably benzyltriethylammonium chloride. Even more preferably, the process is performed in one pot.
Abstract:
The present invention relates to a catalyst for the thermochemical generation of hydrogen from water and/or the thermochemical generation of carbon monoxide from carbon dioxide comprising a solid solution of cerium dioxide and uranium dioxide.
Abstract:
A polymer composition for solar cell and flexible electronics devices, where the polymer is a p-type conducting polymer. The p-type polymer comprises a benzothiadiazole acceptor and indeno-fluorene donor. Further, a solar cell and flexible electronic device article may be made from the polymer.
Abstract:
The present invention is directed to a process for the gas phase polymerisation of ethylene in the presence of a catalyst composition comprising a support material carrying a chromium compound and a magnesium containing compound represented by the formula R1MgX, wherein R1 is a (C1-C20) hydrocarbon group and X is a halogen atom wherein the molar ratio chromium to magnesium ranges between 10:1 and 1:1.
Abstract:
Process for performing an endothermic reaction in a reactor containing catalyst tubes, the catalyst tubes containing a catalyst promoting the endothermic reaction, the process comprising the steps of, a. contacting the catalyst contained in the catalyst tubes with a feed flow passing through the channels from an entrance end to an exit end, b. contacting an outer surface of the catalyst tubes with a flow of a heating medium having an initial heating temperature and flowing co-currently with the flow of feeds to heat the surface by convection, c. mixing at least part of the heating medium after having been contacted with the catalyst tubes with a flow of fresh heating medium having a start temperature higher than the initial heating temperature to form the co-current heating medium having the initial heating temperature and reactor for carrying out the process.
Abstract:
The invention relates to a process for converting a feed stream consisting of reactive components and an optional feed diluent to a product stream comprising aromatic hydrocarbons and C2-C3 olefins, wherein the reactive components comprise at least 90 vol % of an aliphatic ether selected from the group consisting of methyl tertiary butyl ether and ethyl tertiary butyl ether, the process comprising the step of contacting the feed stream with a catalyst composition comprising a zeolite catalyst, wherein the zeolite catalyst is a zeolite modified by Ga and an element M1 selected from the group consisting of Zn, Cd and Cu.
Abstract:
The present invention relates to a method for removal of an organic amine from a liquid hydrocarbon stream containing the amine, comprising: a) adding water to the hydrocarbon stream containing the amine, b) bubbling carbon dioxide through the hydrocarbon stream containing the amine, and c) separating a solid phase formed containing the amine from a liquid phase.
Abstract:
The invention relates to a multinuclear metallocene catalyst compound according to Formula (1), wherein Y and Y′ are the same or different and independently selected from the group consisting of C1-20 linear, branched or cyclic hydrocarbyl groups, C1-30 aryl and substituted aryl groups; L and L′ are the same or different and are electron-donating groups independently selected from the elements of Group 15 of the Periodic Table; Q and Q′ are the same or different and independently selected from the group consisting of C1-30 alkylene groups; M″ is a metal selected from Groups 3, 4, 5, 6, 7, 8, 9 and 10 or from lanthanide series elements of the Periodic Table; Z is selected from the group consisting of hydrogen, a halogen and C1-20 hydrocarbyl, C1-20 alkoxy and C1-20 aryloxy groups; z is an integer from 1 to 4; n and n′ are independently 0 or 1, with 1≦(n+n′)≦2; B and B′ are the same or different and each is a metallocene compound, with B being represented by the compound of Formula (2) and B′ being represented by the compound of Formula (3), wherein Si is silicon; R and R′ are the same or different and independently a hydrogen or a C1-20 alkyl or aryl group; D, D′, E and E′ are independently ligand compounds having a cyclopentadienyl skeleton selected from cyclopentadienyl, substituted cyclopentadienyl, indenyl, substituted indenyl, fluorenyl and substituted fluorenyl; M and M′ are the same or different and each is independently selected from the group consisting of scandium, yttrium, lanthanoid series elements, titanium, zirconium, hafnium, vanadium, niobium, and tantalum; X and X′ are the same or different and each is selected from the group consisting of hydrogen, a halogen, a C1-20 hydrocarbyl group, C1-20 alkoxy group; and C1-20 aryloxy group; x and x′ are independently integers from 1 to 3. This invention also relates to a catalyst system comprising said multinuclear metallocene catalyst compound and a co-catalyst, to a method of making the multinuclear metallocene catalyst compound and to a process for the polymerisation and copolymerisation of an olefin in the presence of said catalyst system. The invention relates to a multinuclear metallocene catalyst compound according to Formula 1, wherein: Y and Y′ are the same or different and independently selected from the group consisting of C1-20 linear, branched or cyclic hydrocarbyl groups, C1-30 aryl and substituted aryl groups; L and U are the same or different and are electron-donating groups independently selected from the elements of Group 15 of the Periodic Table; Q and Q′ are the same or different and independently selected from the group consisting of Ci-3o alkylene groups; M″ is a metal selected from Groups 3, 4, 5, 6, 7, 8, 9 and 10 or from lanthanide series elements of the Periodic Table; Z is selected from the group consisting of hydrogen, a halogen and C1-20 hydrocarbyl, C1-20 alkoxy and C1-20 aryloxy groups; z is an integer from 1 to 4; n and n′ are independently 0 or 1, with 1
Abstract:
The invention relates to a catalyst system for the production of ultrahigh molecular weight polyethylene comprising I. a solid reaction product obtained by reaction of: (a) a hydrocarbon solution comprising (1) an organic oxygen containing magnesium compound or a halogen containing magnesium compound and (2) an organic oxygen containing titanium compound and (b) a mixture comprising a metal compound having the formula MeRnX3-n wherein X is a halogenide, Me is a metal of Group III of Mendeleev's Periodic System of Chemical Elements, R is a hydrocarbon radical containing 1-10 carbon atoms and 0≦n≦3 and a silicon compound of formula RmSiCl4.m wherein 0≦m≦2 and R is a hydrocarbon radical containing 1-10 carbon atoms wherein the molar ratio of metal from (b): titanium from (a) is lower than 1:1 II. an organo aluminium compound having the formula AIR3 in which R is a hydrocarbon radical containing 1-10 carbon atoms and III. an external electron donor selected from the group of 1,2-dialkoxyalkanes, 1,2-dialkoxyalkenes or an external polymeric electron donor.