On-Line Adjustment of Catalysts by Trim and Olefin Polymerization

A method for producing a polyolefin comprising:

• contacting a first composition and a second composition in a line to form a third composition, wherein:
• the first composition comprises a contact product of a first catalyst, a second catalyst, a support, a first activator, and a diluent, wherein the mol ratio of second catalyst to first catalyst is from 60:40 to 40:60,
• the second composition comprises a contact product of the second catalyst, a second activator, and a second diluent, and
• the third composition comprises a mol ratio of second catalyst to first catalyst of from 60:40 to 90:10;
• introducing the third composition from the line into a gas-phase fluidized bed reactor;
• exposing the third composition to polymerization conditions;
• contacting the third composition and a fourth composition in the line to form a fifth composition, wherein:
• the fourth composition comprises a contact product of a third catalyst, a third activator, and a third diluent, and
• the fifth composition comprises a mol ratio of third catalyst to first catalyst of from 2:1 to 1:10;
• introducing the fifth composition from the line into the gas-phase fluidized bed reactor;
• exposing the fifth composition to polymerization conditions;
• and
• obtaining a polyolefin.