Recycling of superabsorbent polymer with an extensional flow device

US11525047B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Dimitris Ioannis Collias · Mason, US
• John Andrew McDaniel · Middletown, US
• Gary Wayne Gilbertson · Wadsworth, US
• Martin Ian James · Cincinnati, US
• Arsen Arsenov Simonyan · Schwalbach, DE

Key dates

• Filing date: Aug 21, 2020
• Grant date: Dec 13, 2022
• Expiry date: Aug 18, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Poly(acrylic acid)-based superabsorbent polymer (SAP) in a feed stream is converted into poly(acrylic acid) (PAA) in an extensional flow device. The total energy used to degrade the SAP into PAA is less than about 50 MJ/kg SAP.