Recycling of superabsorbent polymer with a hybrid oxidative degradation and high shear mixing

US11993684B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Dimitris Ioannis Collias · Mason, US
• Gary Wayne Gilbertson · Wadsworth, US
• Martin Ian James · Cincinnati, US
• Morgan Christine McGrath · Cincinnati, US
• Raul Victorino Nunes · Loveland, US
• Heitham Darrell Safi · West Chester, US
• Arsen Arsenov Simonyan · Schwalbach, DE
• John Christopher Wesner · Monroe, US

Key dates

• Filing date: Feb 23, 2022
• Grant date: May 28, 2024
• Expiry date: Aug 7, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

New process for recycling of poly(acrylic acid)-based superabsorbent polymer (SAP) using a synergistic combination of high shear mixing device and oxidative degradation of SAP to produce poly(acrylic acid) (PAA) useful to recycle pre- and post-consumer SAP.