Mitsui Chemicals, Inc.

Mitsui Petrochemical Industries, Ltd.

Kiyoaki Sugi

Toshiyuki Tsutsui

Terunori Fujita

Makoto Mitani

Junji Saito

Yasushi Tohi

Shigekazu Matsui

Masatoshi Nitabaru

Haruyuki Makio

Toru Yamada

Teruaki Mukaiyama

Takushi Nagata

Noriaki Kihara

Isao Hashimoto

Satoshi Inoki

Mitsuyuki Takesue

Kiyotaka Yorozu

The invention provides a process using olefin polymerization catalysts exhibiting excellent polymerization activities. The olefin polymerization catalysts of the invention contain a transition metal compound typified by formula (I) and at least one of an organometallic compound, an organoaluminum oxy-compound or a compound which reacts with said transition metal compound to form an ion pair. The process using the inventive catalysts is useful in producing &#x3b1;-olefin/conjugated diene copolymers having specific properties 

Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and &#x3b1;-olefin/conjugated diene copolymers

The invention provides olefin polymerization catalysts exhibiting excellent polymerization activities, a process for olefin polymerization using the catalysts, a novel transition metal compound useful for the catalysts, and &#x3b1;-olefin/conjugated diene copolymers having specific properties. The olefin polymerization catalysts of the invention contain (A) a transition metal compound of formula (I), and (B) an organometallic compound, an organoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compounds of the invention are compounds of formula (I) wherein M is a transition metal atom of Group 3 or 4 of the periodic table; Ris a hydrocarbon group, etc.; Rto Rare each H, a halogen, a hydrocarbon group, etc.; Ris a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc

The invention provides olefin polymerization catalyst exhibiting excellent polymerization activities, a process for olefin polymerization using the catalyst, a novel transition metal compound useful for the catalyst, and an &agr;-olefin/conjugated diene copolymer having specific properties. The olefin polymerization catalyst of the invention comprises (A) a transition metal compound of formula (I) or (II), and (B) an organometallic compound, an oranoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compound of the invention is a compound of formula (I) wherein M is a transition meal atom of Group 3 or 4 of the periodic table; m is an integer of 1 to 3; R is a hydrocarbon group, etc.; R to R are each H, a halogen, a hydrocarbon group, etc.; R is a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc.

&agr;-olefin/conjugated diene copolymers

The invention provides olefin polymerization catalyst exhibiting excellent polymerization activities, a process for olefin polymerization using the catalyst, a novel transition metal compound useful for the catalyst, and an &agr;-olefin/conjugated diene copolymer having specific properties. The olefin polymerization catalyst of the invention comprises (A) a transition metal compound of formula (I) or (II), and (B) an organometallic compound, an oranoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compound of the invention is a compound of formula (I) wherein M is a transition meal atom of Group 3 or 4 of the periodic table; m is an integer of 1 to 3; R,is a hydrocarbon group, etc.; R,to R,are each H, a halogen, a hydrocarbon group, etc.; R,is a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc.

Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and &agr;-olefin/conjugated diene copolymers

A novel process for producing an optically active amine is provided. The optically active amine is adapted for use as an intermediate in synthesizing physiologically active compounds such as pharmaceuticals and agricultural chemicals, as a functional material such as a liquid crystal, and as a starting material in synthesizing fine chemicals. The process comprises the step of reacting an imine with a hydride reagent in the presence of an optically active metal compound and an alcohol compound and/or carboxylic acid compound.

Process for producing optically active amine

The invention provides a method for preparing an optically active alcohol comprising the step of reacting a ketone compound with a hydride reagent in the presence of an optically active metal compound. The resulting optically active alcohols are useful as intermediates for the synthesis of physiologically active compounds such as drugs and pesticides, functional materials such as liquid crystals, and raw materials for synthesis in fine chemistry. A novel optically active cobalt (II) complex useful as a catalyst is also provided.

Optically active cobalt (II) complexes and method for the preparation of

A process for preparing N,O-dialkylhydroxycarbamic acid ester which comprises reacting hydroxylamine or its salt with dihydrocarbyl carbonate in the presence of a basic compound to prepare hydroxycarbamic acid ester and subsequently alkylating this compound with an alkylating agent; a process for recovering N,O-dialkylhydroxycarbamic acid ester which comprises azeotropically distilling the ester with water from a solution containing the ester; a process for preparing N,O-dialkylhydroxylamine which comprises hydrolyzing N,O-dialkylhydroxycarbamic acid ester in an aqueous solution or a hydrous solvent in the presence of an alkali; a process for purifying N,O-dialkylhydroxylamine hydrochloride which comprises adding aldehyde or ketone to a solution of N,O-dialkylhydroxylamine hydrochloride containing O-alkylhydroxylamine hydrochloride as impurities to convert the O-alkylhydroxylamine hydrochloride into O-alkyl aldoxime or O-alkyl ketoxime and subsequently separating the N,O-dialkylhydroxylamine hydrochloride from the reaction system; and a process for separating N,O-dialkylhydroxylamine hydrochloride which comprises (i) adding benzene or alkylated benzene to an aqueous solution containing N,O-dialkylhydroxylamine hydrochloride, azeotropically removing water or a hydrochloride solution, and, subsequently (ii)adding alcohol thereto to obtain N,O-dialkylhydroxylamine hydrochloride in the form of crystal.

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Yamaguchi, Japan

Kiyoaki Sugi