Multiple component feed methods and systems

A method for introduction of multiple components into a polymerization system, comprising the steps of:

• adding at least one polymerization catalyst component into the polymerization system at a controlled rate;
• adding at least one activator compound component into the polymerization system at a controlled rate;
• adding at least one co-catalyst component into the polymerization system at a controlled rate;
• introducing a portion of at least one of the components in at least one pre-contactor;
• directing output from the pre contactor to at least one polymerization reactor;
• and
• directing remaining portions of the components that were not sent to the pre-contactor to the at least one polymerization reactor;
• wherein the step of adding the components into the polymerization system at a controlled rate comprises the steps of:
• selecting a desired flow rate for each component;
• conveying each component into the polymerization system at an actual flow rate;
• measuring the actual flow rate for each component;
• and
• adjusting the actual flow rate for each component to substantially equal the desired flow rate.