Maruzen Oil Co. Ltd.

Cosmo Oil Co., Ltd.

Matsuyama Petrochemicals Inc.

Cosmo Research Institute

Cosmo Oil Company & Petroleum Energy Center

Petpoleum Energy Center

Hatsutaro Yamazaki

Hiroshi Fujiwara

Kazushi Usui

Motoo Shigeyasu

Kazuo Ozawa

Takeshi Tomino

Takashi Fujikawa

Tomohiro Yoshinari

Yukio Shibata

Katsuyoshi Ohki

Takehiko Kitamura

Michio Kuki

Yoshihiro Mizutani

Yasuo Yamamoto

Takuo Suzuki

Kazuo Idei

Osamu Chiyoda

Mitsugu Yumoto

Etsuo Suzuki

Shunji Kitada

A process for producing a hydrodesulfurization catalyst is disclosed, comprising impregnating an inorganic oxide carrier containing a crystalline aluminosilicate with a solution consisting of Group VI metal oxide, a Group VIII metal oxide, and phosphorus. Also disclosed is a process for deep hydrodesulfurization of a gas oil fraction using said catalyst to obtain gas oil having an extremely low sulfur content.

Process for producing hydrodesulfurization catalyst and

Disclosed is a process for hydroconverting a heavy hydrocarbon oil in a reactor under high-temperature and high-pressure conditions, wherein said hydroconversion is carried out through using at least three desulfurization catalysts which each contains as active metals transition metals of Group VI and VIII in the Periodic Table supported on an alumina carrier and which have different SI of 40 or higher, 30 or higher and below 40, and lower than 30, respectively, and wherein said at least three catalysts are packed into the reactor in a descending order of SI from the inlet to the outlet of the reactor, with the proportion of the catalyst having SI of 40 or higher is at least 10% by volume, that of the catalyst having SI of 30 or higher and below 40 is at least 20% by volume, and that of the catalyst having SI of lower than 30 is at least 30% by volume.

Hydroconversion process for heavy hydrocarbon oil

A catalyst composition for the hydrogenation of heavy hydrocarbon oil comprising at least one active ingredient for hydrogenation supported on a porous refractory oxide carrier and which has the following characteristics:

Catalyst composition for hydrogenation of heavy hydrocarbon oil and

A process for the production of a p-vinyl phenol polymer which comprises polymerizing p-vinyl phenol in the presence of (a) phenols that do not have any unsaturated side chains and (b) a polymerization accelerator; wherein water and iron are present in the polymerization reaction system so as to control formation of low molecular weight by-products which damage properties of the resulting p-vinyl phenol polymer.

Process for the production of p-vinyl phenol polymer

A process for the production of p-vinyl phenol by the dehydrogenation of p-ethyl phenol in a gaseous phase in the presence of a catalyst and a diluent wherein the dehydrogenation of p-ethyl phenol is effected with phenol and/or p-cresol being present in the reaction system in an amount of 5 to 50 wt % of the amount of p-ethyl phenol.

Process for the production of para-vinyl phenol by dehydrogenation of

A process for producing terephthalic acid of high quality suitable for use in direct polymerization comprising oxidizing a para-dialkylbenzene and/or an oxidized intermediate thereof in the liquid phase with molecular oxygen or a molecular oxygen-containing gas in the presence of an oxidation catalyst containing a heavy metal in a lower aliphatic carboxylic acid solvent, the reaction being carried out in the presence of a specified amount of a phenol. Polyesters prepared from the resulting terephthalic acid have good color.

Process for producing high-quality terephthalic acid suitable for use in

A method for recovering a heavy metal oxidation catalyst used in a liquid-phase oxidation process for producing terephthalic acid from the residue of the reaction mother liquor by stirring the residue together with water in the presence of molecular oxygen and a sulfur compound, subjecting the extracted mixture to a solid-liquid separation to separate the solid impurities, adding the aqueous solution containing the oxidation catalyst to an alkali metal or ammonium carbonate or an aqueous solution of an alkali metal or ammonium carbonate while maintaining the temperature of the system at about 26.degree.C to 70.degree.C, and recovering the heavy metal catalyst as a carbonate precipitate having high purity and good filterability and washability.

Method for recovering a liquid-phase oxidation catalyst for preparation

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Saitama, Japan

Hatsutaro Yamazaki