Ube Industries, Inc.

Yasushi Shiomi

Shinichi Furusaki

Katsuro Masunaga

Masaoki Matsuda

Haruhiko Miyazaki

Hiroshi Yanagisawa

Satoru Fujitus

Yasuo Nakamura

Muneki Saito

Keigo Nishihira

Masayoshi Yamashita

Tokuo Matsuzaki

Kozo Fujii

Kenji Nishimura

Toshihiko Sumida

Takumi Manabe

Hiroyuki Fukushima

Michio Tobita

Yasunori Miyamoto

Process for producing diol compounds

A diol compound, for example, hexanediol, is produced with a high efficiency by esterifying a carboxylic acid mixture, collected from a reaction product mixture of a liquid phase oxidation of cyclohexane, with an esterifying agent and hydrogenate-decomposing the resultant esterification product mixture with hydrogen. The hydrogenate-decomposition is carried out by using a specific catalyst free from chromium and including a member selected from (A) copper and zinc-containing catalytic materials which are prepared by mixing an aqueous solution of water-soluble copper and zinc salts with an aqueous alkali metal or ammonium carbonate or alkali metal or ammonium hydrogen carbonate solution, reducing the resultant precipitate comprising a basic copper and zinc carbonate mixture with hydrogen and partially oxidizing the resultant reduction product with an oxygen-containing gas, and (B) copper and zinc-containing catalytic materials which are prepared by conducting the same mixing procedure as that for the catalytic material (A) except that the mixing is carried out at a temperature of 60.degree. to 95.degree. C. at a pH of 6.5 to 9.0, and by calcining the resultant precipitate at a temperature of 300.degree. C. to 450.degree. C.

A monoalkylether of a dihydric phenol compound is produced at a high conversion and selectivity by catalytically dehydration reacting a dihydric phenol compound with a lower monohydric alcohol in the presence of a catalyst comprising at least one inorganic substance of the empirical formula (I):

Method of producing a monoalkylether of a dihydric phenol compound

A monoalkylether of dihydric phenol compound is produced by bringing a feed gas comprising a mixture gas of a dihydric phenol compound with a monohydric alcohol compound into contact with an active catalyst component comprising at least one member selected from phosphorus compounds, and mixtures and reaction products of phosphorus compounds with boron compounds and carried on an inert solid carrier consisting of, for example, .alpha.-alumina, .gamma.-alumina, activated carbon or titania grains, and preferably having a pore volume of 0.1 ml/g or more and a specific surface area of 1 m.sup.2 /g or more, at a temperature of 200.degree. C. to 400.degree. C., and collecting the resultant reaction product from the reaction mixture.

Process for catalytically producing monoalkylether of dihydric phenol

In a process for preparing a diester of oxalic acid by the vapor phase catlytic reaction of carbon monoxide with an ester of nitrous acid in the presence of a catalyst composed of a solid carrier and a catalyst component supported on the carrier, the improvement wherein said catalyst component is composed of

Process for the preparation of a diester of oxalic acid

In a process for preparing a diester of oxalic acid by the vapor phase catalytic reaction of carbon monoxide with an ester of nitrous acid in the presence of a catalyst composed of a solid carrier and a catalyst component supported on the carrier, the improvement wherein said catalyst component is composed of

Process for the production of a diester of oxalic acid

In a process for preparing a diester of oxalic acid by the vapor phase catalytic reaction of carbon monoxide with an ester of nitrous acid in the presence of a catalyst composed of a solid carrier and a platinum-group metal or a salt thereof supported on the carrier, the improvement wherein said solid carrier is alumina having a specific surface area of not more than 90 m.sup.2 /g.

Process for preparing oxalic acid diesters using platinum group metals

Process for the preparation of oxalic acid diesters

A process for preparing a diester of malonic acid which comprises reacting ketene and carbon monoxide with an ester of nitrous acid catalytically in the presence of metallic palladium or a salt thereof.

Process for preparing diesters of malonic acid

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Ube, Japan

Yasushi Shiomi