Abstract: A method is herein disclosed by which a polymerizable monomer or a mixture thereof can be economically and efficiently converted to polymeric substances with a high yield catalyst in a vapor phase polymerization process using a stirred-bed, quench-cooled, horizontaL reactor together with essentially total reactor off-gas recycle and melt finishing. The method is further characterized by being essentially isobaric at least up to the polymer finishing steps.

Abstract: Lower alkyl, neutral phosphoryl esters are disclosed herein as effective materials to reduce deleterious chloro compound concentrations in polyolefins and compositions based thereon, which polyolefins and compositions are produced in bulk or vapor-phase processes using high yield catalysts in which catalyst residues and solubles need not be removed prior to processing.

Abstract: Apparatus for the vapor phase polymerization of at least one polymerizable monomer comprising: (a) a horizontal reactor of substantially circular cross-section containing a centrally-located drive shaft extending longitudinally through said reactor to which are attached a plurality of adjacently located paddles, which paddles cause essentially no forward or backward movement of the particulate matter contained in said reactor and extend transversely within and to a short distance from the internal surfaces of said reactor, said reactor being divided into two or more individually gas-composition-controllable and polymerization-temperature-controllable polymerization compartments, by one or more dividing structures so constructed to control gas intermixing and movement of said particulate matter between said compartments; (b) driving means for said drive shaft; (c) one or more reactor off-gas outlets in each of said compartments spaced along the topward part of said reactor; (d) one or more vapor recycle inlets

Abstract: A novel catalyst for producing crystalline poly alpha-olefins in excellent yields which coproduces substantially zero percent of low-molecular-weight and amorphous polymers is herein described. This novel catalyst is useful in polymerization techniques which use a solvent or those in which condensed monomer is the liquid phase or those in which polymerization is accomplished using monomer substantially in the vapor phase.