US 11,806,685 B2
Slurry loop reactor polymerization rate and quality controller
Douglas J. Picou, Baton Rouge, LA (US); Keith W. Trapp, Kingwood, TX (US); Kelly M. Forcht, Louisville, KY (US); Asha C. Quant, Houston, TX (US); Ariana L. Poindexter, Houston, TX (US); and Maxwell T. Mcgee, Baton Rouge, TX (US)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed on Aug. 20, 2020, as Appl. No. 16/998,204.
Claims priority of provisional application 62/899,819, filed on Sep. 13, 2019.
Prior Publication US 2021/0077974 A1, Mar. 18, 2021
Int. Cl. B01J 19/06 (2006.01); B01J 19/00 (2006.01); B01J 19/24 (2006.01); C08F 10/02 (2006.01); C08F 2/01 (2006.01)
CPC B01J 19/06 (2013.01) [B01J 19/0033 (2013.01); B01J 19/2455 (2013.01); C08F 10/02 (2013.01); B01J 2219/00202 (2013.01); B01J 2219/00234 (2013.01); B01J 2219/00238 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for polymerization of a monomer in a loop polymerization reactor controlled by a reaction rate controller program, comprising:
continuously and periodically obtaining polymerization results comprising at least melt index (MI), production rate and ash content on the polymerized monomer;
the reaction rate controller program (RRC):
determining whether each of the polymerization results is within predetermined target ranges for those results;
storing recently obtained polymerization results in a computer readable database stored within the RRC, and averaging the recently obtained results with previously stored results; and
when at least one of the polymerization results is out-of-range with respect to its predetermined target range, modifying at least one reaction parameter set-point comprising monomer concentration, catalyst feed rate or reactor temperature, and controlling associated hardware for modifying reaction parameter set-point(s) to drive any out-of-range polymerization result(s) toward the predetermined target range for that result.