Process for the polymerization of alpha-olefins
AssigneeSolvay (Societe Anonyme)
InventorsHelmut Derleth, Abel Grosjean
Life of this patent
Estimating the term…
Abstract
Process for the polymerization of alpha-olefins in the presence of a catalyst, including providing monodisperse microspheroidal particles by spraying an electrostatically charged gellable liquid material (L) through a spraying orifice and into a chamber, so as to produce macrodrops which break up into microdrops which fall in the chamber and within which gelling is produced after spraying; providing a catalyst for the polymerization of alpha-olefins which contains chromium and which is supported on the monodisperse microspheroidal particles; and polymerizing alpha-olefins in the presence of the catalyst.
Claims17
A process for the polymerization of alpha-olefins containing from 2 to 8 carbon atoms per molecule in the presence of a catalyst, comprising:
- (a) electrostatically charging a gellable liquid material (L) comprising oxides of metals of Groups IIIb, IVB, IIIA, and IVA of the periodic table with an electrostatic charging means;
- (b) spraying the electrostatically charged gellable liquid material (L) through a spraying orifice and into a chamber, so as to produce macrodrops which break up into microdrops which fall in the chamber and within which gelling is produced after spraying thereby providing monodisperse microspheroidal particles;
- (c) supporting a catalyst which contains chromium and which is effective for polymerization of the alpha-olefins on the monodisperse microspheroidal particles;
- and
- (d) polymerizing the alpha-olefins in the presence of the supported catalyst.
Dependencies are inferred from the claim text.