Kawasaki Steel Corporation

Catalysts & Chemicals Industries Co., Ltd.

Jgc Corporation

Susumu Fujii

Yusaku Arima

Yukio Asami

Toshinao Aono

Noboru Hirooka

Takeshi Koyama

Masayuki Hanada

Hiroshi Fujishima

Koji Takiguchi

Ikutoshi Nozue

Solid particles which comprise a substantially homogeneous mixture of an active carbon and an attrition-resistant inorganic substance and which have an average particle size of smaller than 300 .mu.m. The average particle size is preferred to range from 20 to 200 .mu.m. The inorganic substance is, for example, silica, titania, zirconia, alumina or silica-alumina. The active carbon is preferred to be contained in an amount of 5 to 70% by weight. The solid particles can be produced by spray drying a slurry containing an active carbon or a precursor thereof and an attrition-resistant inorganic substance or a precursor thereof so that particles having an average particle size of smaller than 300 .mu.m are obtained, and calcining the particles. The inorganic substance or precursor thereof is preferably present in a colloidal or hydrogel state in the slurry. The particles are excellent in attrition resistance and mechanical strength. A catalyst support and a catalyst comprising the solid particles are also disclosed.

Solid particle containing active carbon, support and catalyst

A process for the production of carboxylic anhydrides from aromatic hydrocarbons in gas phase oxidation by using a high activity and high selectivity fluid catalyst, comprising 50 to 95% by weight calculated as TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3 of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and 5 to 50% by weight calculated as V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal) +SO.sub.3 of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of 0.02 to 0.5 and 0.25 to 1.0, respectively, is provided.

Process for the production of carboxylic anhydrides

A high activity and high selectivity fluid catalyst for use in gas phase oxidation of aromatic hydrocarbons, comprising 50 to 95% by weight (calculated by TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3) of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and 5 to 50% by weight [calculated by V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal)+SO.sub.3 ] of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of from 0.02 to 0.5 and from 0.25 to 1.0, respectively, is provided.

Fluid catalyst for use in gas phase oxidation of aromatic hydrocarbons

A catalyst which comprises titanium oxide reinforcing material and oxides of one or more metals selected from Group Ia, Group IIa, Group IIb and Group IVb of the periodic table, the weight of said oxides corresponding to at least 0.5 wt. % of the weight of a final catalyst exhibits an excellent activity in hydrolysis of carbonyl sulfide. Said catalytic activity has no possibility of deterioration even in the presence of hydrogen sulfide and/or carbon dioxide coexist with feed gas.

Catalyst for use in hydrolysis of carbonyl sulfide

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Kitakyushu, Japan

Susumu Fujii