Process for introducing catalyst in a polymerization process

A system for a bulk polymerization process, the system comprising:

• a first reactor configured to prepare, in the absence of cocatalyst and electron donor, at a temperature of room temperature to −48° C. and a pressure sufficient to ensure the presence of liquid propylene, a catalyst mixture, comprising unreacted liquid propylene and free of C20 or greater hydrocarbons,
• a catalyst feed that feeds a catalyst into the first reactor,
• a first propylene feed that feeds liquid propylene into the first reactor,
• a second reactor configured to activate the catalyst mixture by the addition of a cocatalyst, an electron donor, and liquid propylene at temperature sufficiently low to as to not polymerize or prepolymerize the propylene, wherein the second reactor is either a continuous stirred-tank reactor or a continuous plug-flow reactor;
• a first feeder transferring the catalyst mixture from the first reactor into a second reactor,
• a cocatalyst feed that feeds the cocatalyst into the second reactor,
• an electron donor feed that feeds the electron donor into the second reactor,
• a second liquid propylene feed that feeds liquid propylene into the first feed or the second reactor,
• a bulk polymerization reactor, and
• a second feeder that connects the second reactor to the bulk polymerization reactor and feeds the catalyst mixture from the second reactor into the bulk polymerization reactor.