Abstract: A catalyst support including a zeolite having an Al/Si atomic ratio of 0.01-0.1 and mesopores having a pore diameter in the range of 5-30 nm, and ultrafine particles composited to inside walls of the mesopores. The superfine particles are those of an oxide of a metal selected from Ti, Zr and Hf.

Abstract: A catalyst support including a zeolite having an Al/Si atomic ratio of 0.01-0.1 and mesopores having a pore diameter in the range of 5-30 nm, and ultrafine particles composited to inside walls of the mesopores. The superfine particles are those of an oxide of a metal selected from Ti, Zr and Hf.

Abstract: A process for removal of hydrogen sulfide is here provided by which sulfur and hydrogen can be efficiently recovered from a hydrogen sulfide-containing gas and secondarily produced sulfuric acid can be properly treated, whereby a long-term continuous operation is possible in a closed system.The invention is mainly directed to a process which comprises the steps of bringing a hydrogen sulfide-containing gas into contact with an aqueous iron salt (Fe.sup.3+) solution to carry out oxidation reaction and to thereby produce a solution containing Fe.sup.2+, sulfur and secondarily produced sulfuric acid in a hydrogen sulfide gas absorption-oxidation step, separating sulfur from the solution, electrochemically treating the solution to regenerate the aqueous iron salt (Fe.sup.

Abstract: The novel compound provided by the invention is a higher carboxylic acid triester of adamantane triol such as adamantane-1,3,5-triol tricaprylate not known in the prior art. The compound has a high kinematic viscosity at elevated temperatures despite the low pour point and has high thermal stability in an oxidizing atmosphere so that it is useful as an ingredient of a high-performance lubricating oil.

Abstract: The novel compound provided by the invention is a higher carboxylic acid triester of adamantane triol such as adamamtane-1,3,5-triol tricaprylate not known in the prior art. The compound has a high kinematic viscosity at elevated temperatures despite the low pour point and has high thermal stability in an oxidizing atmosphere so that it is useful as an ingredient of a high-performance lubricating oil.

Abstract: The invention provides catalysts for the catalytic cracking of heavy oil, comprising an iron-containing crystalline aluminosilicate zeolite. This crystalline aluminosilicate zeolite is obtained by treating a raw crystalline aluminosilicate zeolite material with an acidic solution containing iron ions, or alternatively, by applying a steam treatment and, thereafter, treating with an acidic solution containing iron ions. The use of the catalyst provides a gasoline fraction having a high octane value and an intermediate fraction from heavy oil in high yield.

Abstract: Acenaphthenes are obtained by reacting cyclododecatriene in the presence of a specified catalyst. Acenaphthenes are raw materials for jet fuel, synthetic resin, dye, bacteriocide, insecticide, synthetic lubricant oil, additives for various lubricating oils, etc.

Abstract: Unsaturated carbonyl compounds such as methyl methacrylate are produced by reacting an acetylene, CO and water or an alcohol in the presence of a catalyst comprising a Pd(II) compound and a compound R"X where R" is H, lower alkyl or aryl and X is halogen, and in the presence of an oxygen-containing compound other than water or an alcohol.

Abstract: This invention relates to a process for producing alkyl adamantanes by reacting tetracyclododecanes and hydrogen in the presence of a specific catalyst.

Abstract: Adamantane derivatives of this invention are represented by the formula ##STR1## wherein R.sub.1 is ##STR2## or --CH.sub.2 -- and R.sub.2 is ##STR3## or --CH.sub.2 CH=CH--. Said derivatives are cerebral vasodilators or intermediates for the same.

Abstract: Adamantane compound is obtained by isomerizing a tricyclic saturated hydrocarbon having 10 to 14 carbon atoms in the presence of an X- or Y-type zeolite catalyst subjected to ion exchange with one or two kinds of metal ions selected from the group consisting of ions of rare earth metals, calcium and magnesium. The preferred catalyst is a catalyst which is further loaded with 1 to 4 kinds of metals selected from the group consisting of germanium, platinum, rhenium, nickel, cobalt, copper, iron ruthenium and rhodium. This isomerization reaction is preferably carried out in the presence of hydrogen gas.