Low temperature hydrocarbyloxide treatment of catalyst

Abstract From the Canadian patent

A process for producing a catalyst comprising activating a supported chromium oxide at a temperature within the range of 500-2000°F; thereafter treating said thus-activated catalyst with from 0.5-10 weight percent based, on the weight of said catalyst of a hydrocarbyl aluminum hydrocarbyloxide at a temperature below 80°F. Ethylene homopolymers and copolymers are made in a particle form process over a catalyst which is treated as a relatively low temperature with aluminum hydrocarbyloxide. This catalyst is capable of producing high melt flow polymer at lower temperatures and also produces polymer having exceptionally high shear response. This catalyst is useful for producing ethylene …