Recycling of superabsorbent fibers via UV irradiation in flow system

US12384900B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Juliane Kamphus · Schwalbach, DE
• Bruno Johannes Ehrnsperger · Bad Soden, DE
• Arsen Arsenov Simonyan · Schwalbach, DE
• Dimitris Ioannis Collias · Mason, US
• John Andrew McDaniel · Middletown, US
• Martin Ian James · Cincinnati, US
• Gary Wayne Gilbertson · Wadsworth, US
• Jacqueline Besinaiz Thomas · Oregonia, US
• Yiping Sun · Mason, US

Key dates

• Filing date: Feb 3, 2022
• Grant date: Aug 12, 2025
• Expiry date: Feb 8, 2044

Classification

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

Abstract

Superabsorbent fibers (SAF) in a feed stream is converted with UV irradiation into soluble polymers in a flow system. The UV total energy used to convert SAF into soluble polymers is less than about 50 MJ/kg SAF.