Patent ID: 7980264

Claim:
A system for feeding a slurry catalyst composition comprising: (a) a primary slurry feed system comprising a primary slurry flow meter and a primary catalyst injection device, wherein the primary slurry flow meter measures a primary slurry catalyst composition flow rate to the primary catalyst injection device; and (b) a secondary slurry feed system comprising a secondary slurry flow meter, a secondary carrier liquid, a secondary carrier liquid control device, and a secondary catalyst injection device, wherein the secondary slurry flow meter measures a secondary slurry catalyst composition flow rate to the secondary catalyst injection device, wherein the secondary carrier liquid control device controls a process parameter of the secondary slurry feed system based on a ratio of the primary slurry catalyst composition flow rate to the secondary slurry catalyst composition flow rate, wherein the secondary slurry feed system further comprises a secondary carrier liquid flow meter, a secondary carrier liquid controller, and a secondary slurry flow controller, wherein the process parameter controlled by the secondary carrier liquid control device is a secondary carrier liquid flow rate measured by the secondary carrier liquid flow meter, wherein the secondary carrier liquid controller controls the secondary carrier liquid control device based on the secondary carrier liquid flow rate and a secondary carrier flow setpoint from the secondary slurry flow controller.