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1 441 534

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Application

4233545/04, 1987-03-17

(22)

Actual filing date

1987-03-17

(45)

Published

1997-11-10

(72)

Inventor

Vermel' E.E.Bukatov G.D.Sergeev S.A.Zakharov V.A.Nikitin V.E.Tolstov G.P.Polle Eh.G.Jurtaev O.N.Labzovskij S.Ja.Shestak N.P.Denilov R.Kh.

METHOD OF PREPARING CATALYST FOR STEREOSPECIFIC POLYMERIZATION OF PROPYLENE Russian patent published in 1997 - IPC

Abstract SU 1441534 A1

FIELD: catalysts for olefin polymerization processes. SUBSTANCE: catalyst is prepared by reducing titanium tetrachloride with an organoaluminum compound at molar ratio 3.2 to 4.5 in presence of an ether and halogen compound in hydrocarbon solvent. According to invention, as halogen compound, one selected from the following group: CCl4, EtCl, EtBr, EtI, PrCl, PrBr, PrI, BuCl, BuBr,and PhCl is employed in quantity 0.01 to 1.0 or iodine in quantity 0.001 to 0.003 mol per 1 mol organoaluminum compound. Method ensures obtaining catalyst with high stereospecifity, which preserves high activity and good grain- size distribution, using simplified technology making it possible to obtain polypropylene powder with high apparent density and containing practically no dustlike fraction. EFFECT: increased stereospecifity of catalyst. 2 cl, 3 tbl

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SU 1 441 534 A1

Authors

Vermel' E.E.

Bukatov G.D.

Sergeev S.A.

Zakharov V.A.

Nikitin V.E.

Tolstov G.P.

Polle Eh.G.

Jurtaev O.N.

Labzovskij S.Ja.

Shestak N.P.

Denilov R.Kh.

Dates

1997-11-10—Published

1987-03-17—Filed

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