Recycling of superabsorbent polymer via UV irradiation in flow system

US11154839B2 · 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 23, 2019
• Grant date: Oct 26, 2021
• Expiry date: Jul 15, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Poly(acrylic acid)-based superabsorbent polymer (SAP) in a feed stream is converted with UV irradiation into poly(acrylic acid) (PAA) in a flow system. The UV total energy used to convert SAP into PAA is less than about 50 MJ/kg SAP.