摘要:
Methods are provided for modifying hydrogenation catalysts having silica supports (or other non-alumina supports) with additional alumina, and using such catalysts to achieve unexpectedly superior hydrogenation of feedstocks. The modified hydrogenation catalysts can have a relatively low cracking activity while providing an increased activity for hydrogenation.
摘要:
La presente invención se refiere a catalizadores de fórmula general Tp (CF3)2,Br M L, donde M es un metal en estado de oxidación +1 seleccionado de entre cobre o plata y L es un disolvente seleccionado de entre el acetonitrilo o el tetrahidrofurano. La presente invención se refiere también al uso de los mismos para la inserción de diazocompuestos en los enlaces carbono- hidrógeno de alcanos y al procedimiento de síntesis de dichos catalizadores.
摘要翻译:本发明涉及通式为Tp(CF 3)2,Br M L的催化剂,其中M为氧化态金属+1,选自铜和银,L为选自乙腈或四氢呋喃的溶剂。 本发明还涉及其用于将重氮化合物插入烷烃的碳 - 氢键的用途以及合成所述催化剂的方法。
摘要:
固体高分子形燃料電池用触媒の担体として用いたとき、固体高分子形燃料電池の運転条件である高加湿条件での発電性能に優れる固体高分子形燃料電池用の担体炭素材料及び金属触媒粒子担持炭素材料を提供する。 多孔質炭素材料であって、水素含有量が0.004質量%以上0.010質量%以下の範囲にあって、窒素吸着BET比表面積が600m 2 /g以上1500m 2 /g以下であり、且つ、ラマン分光スペクトルから得られるD-バンドと呼ばれる1200~1400cm -1 の範囲のピーク強度(I D )と、G-バンドと呼ばれる1500~1700cm -1 の範囲のピーク強度(I G )との相対的強度比(I D /I G )が1.0以上2.0以下であることを特徴とする固体高分子形燃料電池用の担体炭素材料及び金属触媒粒子担持炭素材料である。
摘要:
Provided is a material that, when compared with SAPd, exhibits the same activity in cross-coupling (CC) reactions, can decrease the amount of catalytic metal that is mixed into the reaction product, and increases the number of times use can be repeated. Provided are a catalyst and a catalyst precursor that use a catalytic metal other than Pd and that exhibit the same CC reaction activity as when Pd is used. Provided are a catalyst and a catalyst precursor that exhibit the same CC reaction activity when using Pd or a catalytic metal other than Pd, without using a carrier such as metal and without using piranha solution. A composite wherein catalytic metal nanoparticles are dispersed in a continuous phase comprising a polymer having C2-6 alkylene group units and phenylene group units (an alkylene group unit being bonded to at least the first and fourth position of the phenylene group unit). The particle diameter of the catalytic metal nanoparticles is at most 20nm. A composite structure including a substrate, and the aforementioned composite provided to the surface of the substrate. A method for manufacturing the composite structure by dehydrocondensating, in the presence of a catalytic metal compound, a benzene compound having at least two alkyl groups (two of the alkyl groups being at the first and fourth position) in order to form the composite on the substrate surface.
摘要:
Systems having at least one photonic antenna molecule and at least one catalyst for degrading a sugar to degradation products using light energy are disclosed. Also disclosed are the devices and methods that use the systems for photocatalytically degrading a sugar into degradation products.
摘要:
Catalytic hydrochlorination system comprising at least one amine hydrochloride and at least one group VIII metal compound chosen from the group composed of mixtures of a platinum (IV) compound with tin (II) chloride, mixtures of a platinum (II) compound with triphenylphosphine oxide and mixtures of a palladium (II) compound with triphenylphosphine. This catalytic system is suitable for preparing vinyl chloride by reaction of acetylene with hydrogen chloride.
摘要:
Disclosed are heterogeneous platinum group metal catalysts that are catalytically active towards hydrosilylation. These catalysts include a carrier in communication with platinum group metal particles, wherein the particles are affixed to a polyelectrolyte layer. Also disclosed are polymers that are the hydrosilylation reaction product of (a) a polysiloxane containing silicon hydride and (b) an organic compound having aliphatic unsaturation in the molecule, wherein the hydrosilylation reaction is carried out in the presence of a catalytic amount of such a catalyst, a heterogeneous platinum group metal catalyst that is catalytically active towards hydrosilylation, coating compositions that include such polymers and substrates at least partially coated with such compositions.
摘要:
A polysilane-supported transition metal catalyst or (polysilane/inorganic compound)-supported transition metal catalyst which comprises as a polymeric support either a polysilane compound or a combination of a polysilane compound and an inorganic compound and, supported thereon, any of various transition metals. The catalyst is sparingly soluble in hydrocarbons or alcohols and is useful as a heterogeneous-system catalyst for various organic synthesis reactions using those compounds as solvents. The polysilane having a transition metal supported thereon can be easily crosslinked by heating, microwave irradiation, ultraviolet irradiation, or a chemical technique, e.g., hydrosilylation to become insoluble in various solvents while retaining the catalytic activity. By supporting this polysilane-supported transition metal catalyst on an inorganic compound, stability and handleability are improved. These polysilane-supported transition metal catalysts have high activity in hydrogenation, hydrosilylation, Heck reaction, Suzuki-Miyaura coupling reaction, and other reactions. The catalysts can be easily recovered and reused and are extremely less apt to release the metal.