Methods for removing polymer skins from reactor walls

US8487053B2 · kind B2 · utility

Assignee

• Chevron Phillips Chemical Company LP · US

Inventors

• George R. Rajaendran · Kingwood, US
• Max P. McDaniel · Bartlesville, US
• Gregory G. Hendrickson · Kingwood, US
• John D. Stewart · Friendswood, US
• John D. Hottovy · Kingwood, US
• Ted H. Cymbaluk · Bartlesville, US
• Susannah Lane · Houston, US
• Richard Hernandez · Rue de l'Église, US
• Elliott W. Johnson · Friendswood, US
• Qing Yang · Bartlesville, US
• William L. Valerioti · Houston, US
• Eric D. Schwerdtfeger · Bartlesville, US
• Albert P. Masino · Hamilton, US

Key dates

• Filing date: Nov 30, 2011
• Grant date: Jul 16, 2013
• Expiry date: Nov 30, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Methods for removing polymer skins or build-up from reactor walls in polymerization reactor systems containing a loop slurry reactor are disclosed. Such methods can employ removing some or all of the comonomer from the reactor system in combination with increasing the polymerization temperature of the loop slurry reactor.