Toa Nenryo Kogyo Kabushiki Kaisha

Yukio Nagashima

Katsumi Kaneko

Shozo Wada

Nobukazu Okamoto

Hiroshi Furukawa

Setsuo Kamiyama

Tadamori Sakakibara

Yoshihisa Matsushima

Yohio Ishii

Makoto Miyazaki

Masami Kizaki

Masahito Fujita

Yoshio Ishii

Yuichi Shimbori

A catalyst component for polymerization of olefins which is prepared by contacting a product obtained by contacting (A) a magnesium alkoxide, (B) a silicon compound having the hydrogen-silicon bond, and (C) a titanium compound with one another, with (D) (a) a hydrocarbon, (b) a halogenated hydrocarbon, and/or (c) a halide of an element selected from the elements of Groups IIIa, IVa, and Va of the Periodic Table.

Catalyst component for polymerization of olefins

This invention relates to rhodium compounds having the general formula:

Process for producing rhodium compounds

Novel rhodium compounds and process for producing the same

In an oxo process wherein an olefin is caused to react with carbon monoxide and hydrogen, a rhodium catalyst is provided by carrying out the hydroformylation in the presence of a rhodium source and free mixed ligands comprising a tertiary organo phosphorus and tertiary organo arsenic in excess of the quantity required for coordination to the rhodium atom. For example, HRh(CO)(PPh.sub.3).sub.3 with excess AsPh.sub.3 /PPh.sub.3 may be used to give a high reaction rate and good selectivity to n-aldehyde.

Process for the production of aldehydes by hydroformylation

This invention relates to a process for the production of alkylbenzenes, which comprises reacting benzene with at least one aromatic hydrocarbon substituted by alkyl groups and containing 9 or more carbon atoms, in the presence of an acid leached hydrogen form mordenite catalyst having a silica (SiO.sub.2)/alumina (Al.sub.2 O.sub.3) molar ratio of 15 to 21 and a sodium content of 0.05 weight % or less as Na.sub.2 O.

Process for the production of alkylbenzenes

A method of stabilizing a catalyst for the conversion of aromatic hydrocarbons in the presence of hydrogen such as the isomerization of C.sub.8 aromatic hydrocarbons to increase the content of p-xylene, is carried out by contacting a catalyst in advance of start-up with hydrocarbons in the liquid phase at a temperature preferably of about 50.degree. to about 250.degree. C. and preferably at elevated pressure up to about 50 Kg/cm.sup.2 in the absence of hydrogen; the catalyst being prepared by the acid leaching of a hydrogen form mordenite to produce a mordenite having a silica to alumina molar ratio of about 15 to 21. Preferably, the hydrocarbons used for the contacting have the composition of the feed to be converted.

Pretreating process for the stabilization of a catalyst for the

A C.sub.8 aromatic hydrocarbon mixture which typically may consist essentially of xylenes and ethylbenzene, the latter being present in an amount of not more than 40 weight percent, is converted to a product containing an increased proportion of p-xylene by bringing it into contact with an acid leached hydrogen form mordenite having a silica to alumina mole ratio of 15-21 at a temperature in the range of 180.degree. to 250.degree. C. under a pressure of atmospheric to 200 Kg/cm.sup.2. Hydrogen may be present in the system in a mole ratio of hydrogen to C.sub.8 aromatic hydrocarbon mixture of 0-10. The reaction may be conducted in the vapor phase or in the liquid phase.

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Ooi, Japan

Yukio Nagashima