초록 ▼

For gas phase polymerization reactions in the presence of an unsupported polymerization catalyst, there is provided a process for introducing a liquid catalyst so as to provide a resin particle lean zone such that the average particle size of the resin produced ranges from about 0.01 to about 0.06 i

For gas phase polymerization reactions in the presence of an unsupported polymerization catalyst, there is provided a process for introducing a liquid catalyst so as to provide a resin particle lean zone such that the average particle size of the resin produced ranges from about 0.01 to about 0.06 inches.

대표청구항 ▼

A process for producing a polymer in a gas fluidized bed reaction vessel having a polymerization zone containing a bed of growing polymer particles under polymerization conditions which comprises: (i) continuously or intermittently introducing one or more monomers, optionally at least one diene, opt

A process for producing a polymer in a gas fluidized bed reaction vessel having a polymerization zone containing a bed of growing polymer particles under polymerization conditions which comprises: (i) continuously or intermittently introducing one or more monomers, optionally at least one diene, optionally at least one inert particulate material, and optionally one or more inert gases into the polymerization zone; (ii) continuously or intermittently introducing into the reaction vessel an unsupported polymerization catalyst in liquid form without immediately contacting the bed of growing polymer particles so as to provide a particle lean zone; (iii) continuously or intermittently withdrawing polymeric product from the reaction vessel; and (iv) continuously withdrawing unreacted monomers and gases from said polymerization and optionally compressing and cooling said gases while maintaining the temperature within the polymerization zone below the dew point of at least one monomer present in the polymerization zone.