Abstract: Embodiments of the present invention include a method of polymerizing olefins comprising contacting olefins with a catalyst composition made by the process of combining a hindered polyalicyclic alkyl catalyst precursor with a particulate inorganic oxide for a deposition time greater than 2 hours to form a catalyst composition. Embodiments of the present invention also include catalyst compositions comprising a hindered polyalicyclic alkyl catalyst precursor made by the process of combining the hindered polyalicyclic alkyl catalyst precursor with a particulate inorganic oxide for a deposition time greater than 2 hours to form the catalyst composition.

Abstract: Embodiments of the present invention include a method of polymerizing olefins comprising contacting olefins with a catalyst composition made by the process of combining a hindered polyalicyclic alkyl catalyst precursor with a particulate inorganic oxide for a deposition time greater than 2 hours to form a catalyst composition. Embodiments of the present invention also include catalyst compositions comprising a hindered polyalicyclic alkyl catalyst precursor made by the process of combining the hindered polyalicyclic alkyl catalyst precursor with a particulate inorganic oxide for a deposition time greater than 2 hours to form the catalyst composition.

Abstract: A process for controlling the particle growth of a polymer in a gas phase polymerization reaction by using an inert particulate material and an unsupported liquid polymerization catalyst.

Abstract: A process for producing sticky polymers at polymerization reaction temperatures in excess of the softening temperatures of the sticky polymers in a fluidized bed reactor in the presence of an inert particulate material which comprises utilizing as a support material for the catalyst, a support which includes silica having an average particle size of from about 60 to about 200 microns.

Abstract: Process for recycling inert particulate materials used in sticky polymer polymerization reactors by discharging the sticky polymer having unbound inert material on its surface into a product hold tank maintained at a lower pressure than the polymerization reactor and thereafter contacting said polymer with a sweep gas and at a velocity sufficient to remove the inert particulate material which is then recycled to the polymerization reactor.

Abstract: A process for preparing ethylene/1-octene copolymers using a titanium based catalyst system under defined polymerization conditions.

Abstract: A process comprising contacting a mixture comprising ethylene and 1-octene in the gas phase, in a fluidized bed reactor, under polymerization conditions, with a catalyst system comprising:(a) the reaction product of a vanadium compound and an electron donor impregnated into an inorganic support;(b) a halocarbon promoter; and(c) a hydrocarbyl aluminum cocatalyst with the following proviso:(i) the partial pressure of ethylene is in the range of about 50 to about 90 psi;(ii) the partial pressure of 1-octene is in the range of about 1.5 to about 2.5 psi;(iii) the temperature in the reactor is in the range of about 5.degree. C. to about 20.degree. C. above the dew point of 1-octene;(iv) the molar ratio of 1-octene to ethylene is in the range of about 0.02:1 to about 0.04:1; and, optionally,(v) the superficial gas velocity is in the range of about 1.4 to about 2.7 feet per second.

Abstract: A process for reducing sheeting during gas phase polymerization of alpha-olefins utilizing catalysts prone to cause sheeting wherein the gaseous feed stream containing monomer comonomer hydrogen and inert gas is introduced into the reactor through the recycle stream to the reactor at a point prior to cooling the recycle stream.