Process for the purification of aqueous hydrogen peroxide solutions

US6540921B1 · kind B1 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Christine Devos · Versailles, FR
• Didier Demay · Le Puy-en-Velay, FR
• Hervé Dulphy · Le Pont-de-Claix, FR

Key dates

• Filing date: Oct 18, 2000
• Grant date: Apr 1, 2003
• Expiry date: Mar 11, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B15/0135
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for the on-site purification of an aqueous hydrogen peroxide solution, in which the solution is made to pass through a resin bed capable, at least partially, of adsorbing or absorbing the impurities present in the solution. The hydrogen peroxide solution is injected into the resin bed and passes through the latter at an approximately linear velocity preferably of between 10 m/h and 50 m/h and more preferably between 10 m/h and 20 m/h, while the resin bed is kept substantially compacted for at least 50% of the time during which the solution is being purified by coming into contact with the said resin.