Abstract:
Metal catalysts comprising hollow forms or spheres are made of metal alloy and optionally activated. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, and/or hydration reaction of organic compounds.
Abstract:
A microporous network material comprises a rigid 3-dimensional network of planer porphyrinic macrocycles in which pyrrole residues of adjacent macrocycles are connected by rigid linkers which restrain these adjacent macrocycles such that their porphyrinic planes are in a non-co-planar orientation. Material in accordance with the invention generally have a surface area of at least 300M2 gnull1, e.g. in the range of 100-1000 m2 gnull1. Preferred materials in accordance with the invention are phthalocyanine networks.
Abstract translation:微孔网络材料包括平面卟啉大环的刚性三维网络,其中相邻大环的吡咯残基通过刚性连接体连接,其限制这些相邻的大环,使得它们的卟啉平面处于非共平面取向。 根据本发明的材料通常具有至少300M 2 g -1的表面积,例如 在100-1000m 2 -1的范围内。 根据本发明的优选材料是酞菁网络。
Abstract:
The present invention provides a novel olefin polymerization catalyst having excellent olefin polymerization activity and, in polymerization with the catalyst comprising a transition metal compound, a polymerization process for preparing a polymer having a low molecular weight with high polymerization activity. The process comprises polymerizing olefin in the presence of an olefin polymerization catalyst comprising (A) a transition metal compound represented by the following 1 nullM: a Group 4 or 5 transition metal atom in the Periodic Table, m: 1-4, R1: H, a C1-C5 linear hydrocarbon group, 3- to 5-membered alicyclic hydrocarbon group, bicycloaliphatic hydrocarbon group wherein two alicyclic rings share one or more carbon atoms, R2 to R6: H, a halogen atom, hydrocarbon group etc, X: H, a halogen atom etc, and n is a valence of Mnull, and (B) at least one compound selected from (B-1) an organometallic compound, (B-2) an organoaluminum oxy compound and (B-3) an ionizing ionic compound.
Abstract:
Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.
Abstract:
This invention is the new and useful embodiment of a long-recongized principlenullthat heterogeneous catalysis takes place in at least two steps, (1) hydrogen is taken up (absorbed) by the catalyst, and (2) that absorbed hydrogen that undergoes the further catalytic reaction. The instant invention divides the two steps between two cooperative and intimately connected layersnull(b) a substantial layer of base metal, which absorbs the hydrogen, and then supplies it rapidly to (2) a much less massive layer of precious metal capable of effecting the desired catalysis. The unexpected and very useful advantage of this invention is that it provides very useful rates of heterogeneous catalytic hydrogenation at far lower requirement of precious metal compared to a catalyst body employing precious metal alone.
Abstract:
A method of producing a Raney type catalyst, the method comprising melting together a Raney metal and aluminium to form an alloy mixture, pouring the mixture through a nozzle, directing a gas jet on to the mixture to form a spray of droplets, which droplets are directed on to a metallic substrate, the substrate material and thickness and latent heat and superheat of the sprayed material upon initial contact with the substrate being such that the temperature is sufficiently high for an exothermic reaction to take place between the alloy mixture and the substrate such that intermetallic bonds are formed therebetween, and subsequently chemically removing at least some of the aluminium from the sprayed material.
Abstract:
Skeletal iron catalysts are prepared and utilized for producing synthetic hydrocarbon products from CO and H2 feeds by Fischer-Tropsch synthesis process. Iron powder is mixed with aluminum, antimony, silicon, tin or zinc powder and 0.01-5 wt. % metal promotor powder to provide 20-80 wt. % iron content, then melted together, cooled to room temperature and pulverized to provide 0.1-10 mm iron alloy catalyst precursor particles. The iron alloy precursor particles are treated with NaOH or KOH caustic solution at 30-95null C. to extract or leach out a major portion of the non-ferrous metal portion from the iron and provide the skeletal iron catalyst material. Such skeletal iron catalyst is utilized with COnullH2 feedstream in either fixed bed or slurry bed type reactor at 200-350null C. temperature, 1.0-3.0 mPa pressure and gas hourly space velocity of 0.5-3.0 L/g Fe/h to produce desired hydrocarbon products.
Abstract translation:制备骨架铁催化剂,并用于通过费 - 托合成方法从CO和H 2进料生产合成烃产物。 铁粉与铝,锑,硅,锡或锌粉末和0.01-5重量% %的金属促进剂粉末提供20-80wt。 铁含量,然后熔化在一起,冷却至室温并粉碎,得到0.1-10mm铁合金催化剂前体颗粒。 铁水合物前体颗粒在30-95℃下用NaOH或KOH苛性碱溶液处理,以从铁中提取或浸出大部分有色金属部分并提供骨架铁催化剂材料。 在200-350℃温度,1.0-3.0mPa压力和0.5-3.0L / g Fe / h的气时空速下,这种骨架铁催化剂与CO + H 2进料流一起用于固定床或浆床型反应器中, 产生所需的烃产物。
Abstract:
A fixed bed Raney copper catalyst, which is doped with iron, noble metals or other metals, is employed as the fixed bed catalyst in the fixed bed dehydrogenation of alcohols.
Abstract:
A fixed bed Raney copper catalyst, which is doped with iron, noble metals or other metals, is employed as the fixed bed catalyst in the fixed bed dehydrogenation of alcohols.
Abstract:
A method for producing fine, essentially contamination free, noble metal alloys is disclosed. The alloys comprise particles in a size range of 5 to 500 nm. The method comprises 1. A method for preparing a noble metal alloy at low temperature, the method comprising the steps of forming solution of organometallic compounds by dissolving the compounds into a quantity of a compatible solvent medium capable of solvating the organometallic, mixing a portion of each solution to provide a desired molarity ratio of ions in the mixed solution, rapidly quenching droplets of the mixed solution to initiate a solute-solvent phase separation as the solvent freezes, removing said liquid cryogen, collecting and freezing drying the frozen droplets to produce a dry powder, and finally reducing the powder to a metal by flowing dry hydrogen over the powder while warming the powder to a temperature of about 150null C.