Chevron Phillips Chemical Company LP

Other

Eric J Netemeyer

Scott E Kufeld

Joel A Mutchler

Joseph A Curren

Jeffrey S Fodor

Paul J DesLauriers

Jamie N Sutherland

Rebecca A Gonzales

Michael S Matson

Qing R Yang

Mitchell D Refvik

Colin Cameron

Anthony Colin Wright

Alastair Robert Marrion

Brooke L Small

Bruce E Kreischer

Jeffrey S Lowell

Kenneth A Dooley

Michael H Treptau

Max P McDaniel

Albert P Masino

Eduardo J Baralt

Richard M Buck

William B Beaulieu

Kenneth D Hope

Eric D Schwerdtfeger

Daniel G Hert

Dale M Solaas

Jeff S Fodor

Christopher Raymond Tully

Greg L Thomas

Joe E Figard

Orson L Sydora

Steven M Bischof

Ryan W Snell

William J Fisher

Matthew F Milner

Ron D Knudsen

Kirsten N Caswell

Daniel M Coombs

Don E Burnett

Nancy W Eilerts

Dennis G Doerr

Max P Mcdaniel

Qing Yang

Apparatuses and processes that produce multimodal polyolefins, and in particular, polyethylene resins, are disclosed herein. This is accomplished by using two reactors in series, where one of the reactors is a multi-zone circulating reactor that can circulate polyolefin particles through two polymerization zones optionally having two different flow regimes so that the final multimodal polyolefin has improved product properties and improved product homogeneity.

Multiple reactor and multiple zone polyolefin polymerization

Polymerization processes and reactor systems for producing multimodal ethylene polymers are disclosed in which at least one loop reactor and at least one fluidized bed reactor are utilized. Configurations include a loop reactor in series with a fluidized bed reactor and two loop reactors in series with a fluidized bed reactor.

Ethylene polymerization processes and reactor systems for the production of multimodal polymers using combinations of a loop reactor and a fluidized bed reactor

Methods of controlling olefin polymerization reactor systems may include a) selecting n input variables, each input variable corresponding to a process condition for an olefin polymerization process; b) identifying m response variables corresponding to a measurable polymer property; c) adjusting one of more of the n input variables using the olefin polymerization reactor system and measuring each of the m response variables as a function of the input variables for olefin polymers; d) analyzing the change in each of the response variables as a function of the input variables to determine coefficients; e) calculating a Response Surface Model (RSM) for each response variable determined in step d); f) applying n selected input variables to the calculated RSM to predict one or more of m target response variables; and g) using the n selected input variables to operate the olefin polymerization reactor system and provide a polyolefin product.

Polyolefin process monitoring and control

Methods of controlling olefin polymerization reactor systems are provided herein. In some aspects, the methods include a) selecting n input variables, each input variable corresponding to a process condition for an olefin polymerization process; b) identifying m response variables, each response variable corresponding to a measurable polymer property; c) adjusting one of more of the n input variables in a plurality of polymerization reactions using the olefin polymerization reactor system, to provide a plurality of olefin polymers and measuring each of the m response variables as a function of the input variables for each olefin polymer; d) analyzing the change in each of the response variables as a function of the input variables to determine the coefficients; e) calculating a Response Surface Model (RSM) using general equations for each response variable determined in step d) to correlate any combination of the n input variables with one or more of m response variables; f) applying n selected input variables to the calculated Response Surface Model (RSM) to predict one or more of m target response variables, each target response variable corresponding to a measurable polymer property; and g) using the n selected input variables Ito Ito operate the olefin polymerization reactor system and provide a polyolefin product.

The present disclosure relates generally to a system having a reactor system with a polymerization reactor and a feed system fluidly coupled to a feed inlet of the reactor. The feed system supplies components to the reactor via the feed inlet, and the reactor has a flow path that continuously conveys the components through the reactor and subjects the components to polymerization conditions to produce a polymer. The system also has an analysis system coupled to the reactor for online monitoring of a particle size of the polymer. Further, the system includes a control system, coupled to the analysis and feed systems, that receives a signal from the analysis system indicative of the monitored particle size of the polymer and adjusts an operating parameter of the feed system to control a flow rate of at least one of the components to the reactor based at least on the signal.

System and method for monitoring and controlling a polymerization system

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Kingwood, TX, United States of America

Eric J Netemeyer