Generation of peroxycarboxylic acids at alkaline pH, and their use as textile bleaching and antimicrobial agents

US8729296B2 · kind B2 · utility

Assignee

• ECOLAB USA INC. · US

Inventors

• Jonathan P. Fast · Windom, US
• Robert D. P. Hei · Baldwin, US
• Richard Staub · Oronoco, US
• Thomas J. Dürrschmidt · Hilden, DE
• Peter Forth · Düsseldorf, DE
• Junzhong Li · Saint Paul, US
• David D. McSherry · Little Canada, US
• Thomas Merz · Hilden, DE
• Johannes G. Winter · Unterhaching, DE

Key dates

• Filing date: Dec 20, 2011
• Grant date: May 20, 2014
• Expiry date: Apr 4, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/00177
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present disclosure provides methods for generating percarboxylic acid compositions and/or peroxycarboxylic acid compositions formed external to a point of use in non-equilibrium reactions for use in certain bleaching and antimicrobial applications, in particular laundry applications. The compositions are generated external to a point of use, at alkaline pH levels, viz. greater than about pH 12, and optionally suitable for use with detergents and/or surfactants for synergistic bleaching efficacy. Methods of bleaching and/or disinfecting are further provided.