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- W293836408 abstract "It has previously been shown that the use of chlorides of nickel, cobalt, iron, tin, aluminum, or other metals as components of the supports for titanium-magnesium ethylene polymerization catalysts makes it possible to vary their catalytic activity and specificity over a wide range. The authors investigated the features of ethylene polymerization on Ziegler-Natta catalysts supported on MgCl/sub 2/ which have been modified with chlorides of Co, Ni, Sn, or V, with the objective of studying the mechanism of the modifying action of metal chlorides. The catalysts were prepared by dispersing MgCl/sub 2/ and the Lewis acid in a ball mill in the presence of TiCl/sub 4/. Compositions and activities of the catalysts prepared are shown. The introduction of nickel chloride or cobalt chloride into MgCl/sub 2/ leads to an increase in TiCl/sub 4/ activity while preserving the mechanism of its attachment to the support surface, while modification of MgCl/sub 2/ with tin tetrachloride or vanadium oxychloride leads to a sharp change in the state of TiCl/sub 4/ on the support surface and to a decrease in catalyst activity." @default.
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- W293836408 date "1988-11-10" @default.
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- W293836408 title "Modification of supported titanium-magnesium catalysts of ethylene polymerization with metal chlorides" @default.
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