Samsung General Chemicals, Co., Ltd.

Institut Kataliza Iment G.k. Boreskova Sibirskogo Otdelenia Rossiiskoi

Valentin Evgenievich Nikitin

Vladimir Alexandrovich Zakharov

Sergei A Sergeev

Ho-Sik Chang

Youn-Kyung Kang

Sergei Iyanovich Makhtarulin

Tatyana Borisovna Mikenas

Ljudmila Gennadievna Echevskaya

Angelina Dmitrievna Khmelinskaya

A method for producing a supported catalyst useful in polymerization of ethylene and copolymerization of ethylene and &agr;-olefin is disclosed. The method includes treating the magnesium-containing carrier with a titanium compound containing oxygen atom(s), wherein said carrier is obtained by reaction of an organomagnesium compound of the structure of MgPh .nMgCl .mR O (n&equals;0.37&tilde;0.7; m&gE;1; R 0&equals;ether; Ph&equals;phenyl) with an organic chloride compound in a mole ratio of organic chloride compound/Mg&gE;0.5, at &minus;20&tilde;80&deg; C. In one embodiment, the organic chloride compound may be carbon tetrachloride. A specific catalyst is provided whose activity is low in the beginning but slowly rises to a sufficient degree as the process of polymerization progresses, the polymer produced with the use of said catalyst having high bulk density, a well adjusted particle size distribution, and a narrow molecular weight distribution.

Method for producing a supported catalyst for ethylene polymerization and ethylene/&agr;-olefin copolymerization

Method of producing a deposited catalyst for the polymerization of

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Truzhennikov per., Russia

Valentin Evgenievich Nikitin