Process for the preparation of an ultra pure hydrogen peroxide solution by the ion exchange by sequence: anionic-cationic-anionic-cationic

US5961947A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Henry Ledon · Versailles, FR
• Martine Carre · Versailles, FR
• Didier Demay · Le Puy-en-Velay, FR
• Christine Devos · Versailles, FR
• Serge Jeanin · Massy, FR

Key dates

• Filing date: Jun 3, 1997
• Grant date: Oct 5, 1999
• Expiry date: Jun 3, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B15/0135
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Provided is a process for the preparation of an ultrapure hydrogen peroxide solution. The process comprises at least one sequence which includes successively passing a solution to be purified through at least two beds of cation-exchange adsorbents (CEA) and two beds of anion-exchange adsorbents (AEA) according to the sequence: EQU AEA .fwdarw. CEA .fwdarw. AEA .fwdarw. CEA Also provided is a plant for the implementation of the inventive process.