Abstract: Plastics recovery, compounding and fabricating apparatus is disclosed utilizing a gear pump specially designed to include a media free space between the gear face and side walls with minimum sealing to improve volumetric pump efficiencies and provide pumping capacity insensitivity to viscosity over a wide range.

Abstract: Plastics recovery and polyolefins compounding systems utilize a gear pump for the pumping function. The gear pump is specially designed to include a free media surrounding substantially the entire gear face with minimum sealing to improve volumetric pump efficiencies and provide pumping capacity insensitivity to viscosity over a wide range. A method of monitoring melt index and production rate for reactor control is also disclosed.

Abstract: Process is disclosed for effecting phase separation of relatively high and low viscosity immiscible liquids comprising maintaining, between inner means in relative rotational movement with outer sleeve means, at least one zone of increased pressure constriction and of decreased pressure constriction; feeding a multiphase mixture of relatively low viscosity and relatively high viscosity liquids to the interior of said sleeve means between said zones of increased and decreased pressure constriction; and withdrawing said high viscosity liquid and said low viscosity liquid from the vicinities of said zones of increased and decreased pressure constriction, respectively.