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2 257 263

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IPC

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Application

2004110871/04, 2004-04-08

(24)

Start date

2004-04-08

(22)

Actual filing date

2004-04-08

(45)

Published

2005-07-27

(72)

Inventor

Nikitin V.E.Mikenas T.B.Zakharov V.A.

(73)

Holder

Institut Kataliza Imeni G.K. Boreskova Sibirskogo Otdelenija Rossijskoj Akademii Nauk

CATALYST PREPARATION PROCESS AND ETHYLENE POLYMERIZATION AND ETHYLENE-ALPHA-OLEFIN COPOLYMERIZATION PROCESSES UTILIZING THIS CATALYST Russian patent published in 2005 - IPC

Abstract RU 2257263 C1

FIELD: polymerization catalysts.

SUBSTANCE: invention, in particular, relates to preparation of Ziegler-type catalyst comprising transition metal (titanium or vanadium) compound on magnesium-containing carrier. Carrier is prepared via interaction of organomagnesium compound-containing solution depicted by formula Mg(C₆H₅)₂·nMgCl₂·mR₂O, wherein n=0.37-0.7, m=2, and R₂O is ether with R = i-Am or n-Bu, with chlorination agent, namely X_kSiCl_4-k, wherein X is OR' or R', in which R can be C₁-C₄-alkyl or phenyl, and k=1-2. Above named polymerization and copolymerization process are carried out with catalyst of invention in combination with cocatalyst.

EFFECT: reduced size distribution range of polymers and enabled average particle size control.

3 cl, 1 tbl, 13 ex

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RU 2 257 263 C1

Authors

Nikitin V.E.

Mikenas T.B.

Zakharov V.A.

Dates

2005-07-27—Published

2004-04-08—Filed