发明授权
US5508245A Spherical components and catalysts for the polymerization of olefins 失效
用于烯烃聚合的球形组分和催化剂

Spherical components and catalysts for the polymerization of olefins
摘要:
Spherical components of catalysts for the polymerization of olefins comprising:(a) a vanadium compound selected from the compounds of formula VOX.sub.2 Y or VX.sub.n Y.sub.n-4n, where X is Cl or Br and Y is Cl, Br OR or NR.sup.I.sub.2(b) MgCl.sub.2 in spherical form.Said components have an average diameter greater than 1 .mu.m, a surface area of at least 10 m.sup.2 /g, a porosity of at least 0.1 g/cm.sup.3 and an X-ray spectrum having particular characteristics.
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