Process for polymerizing olefins in the presence of a catalyst prepared from an organomagnesium component which does not reduce TiCl.sub.4
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United States of America Patent
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Jan 20, 1981
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N/A
app pub date -
Jun 25, 1979
filing date -
Jun 25, 1979
priority date (Note) -
Expired
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Abstract
Solid supported catalysts which can be employed for the polymerization of .alpha.-olefins are prepared by (A) reacting in the presence of a diluent such as n-hexane a mixture of (1) the reaction product of (a) an organo magnesium compound such as dibutyl magnesium and (b) at least one of water, carbon dioxide or an organic, oxygen-containing compound such as n-propyl alcohol; and (2) a transition metal halide such as titanium tetrachloride and (B) recovering the solid precipitate such as by decanting and (C) washing the solid with a solvent such as n-hexane. The resultant solid supported catalyst contains sufficient transition metal which when activated with a suitable activating agent serves as a polymerization catalyst for .alpha.-olefins. The polymers prepared employing these catalysts have a relatively narrow molecular weight distribution and low residual amounts of transition metal and halides.
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