Process for disinfecting aqueous solutions

US5965033A · kind A · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Michael Huss · Eschborn, DE
• Roland Schneider · Schotten, DE
• Birgit Del Grosso · Alzenau, DE

Key dates

• Filing date: Feb 23, 1998
• Grant date: Oct 12, 1999
• Expiry date: Feb 23, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/916
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Owing to the concomitant storage, transport, material and handling problems and the unsatisfactory retarding of reinfection, the use of commercially available peracetic acid solutions with a high peracetic acid (PES) and acetic acid content for disinfecting large quantities of aqueous solutions, e.g. purification plant outlets, has been closely limited. It is possible to disinfect even large quantities of aqueous solutions economically and at the same time retard reinfection by using a peracetic acid solution containing 1.5 to 2.5 wt. % peracetic acid and 40 to 60 wt. % hydrogen peroxide and under 2 wt. % acetic acid as a disinfectant. The use of a peracetic acid solution with less than 1 wt. % acetic acid is preferred.