Ozone-producing process

US4786489A · kind A · utility

Assignee

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

Inventors

• Maurice Grenier · Paris, FR
• Pierre Petit · Verrières-le-Buisson, FR

Key dates

• Filing date: Dec 19, 1986
• Grant date: Nov 22, 1988
• Expiry date: Dec 19, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2208/028
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Each ozonization loop (1) which includes a compressor (2), an ozonizer (3), and a heat exchanger (8) for cooling the oxygen-ozone mixture, is associated with three cylinders (4,5,6) filled with silica gel. Each cylinder operates in succession in a cocurrent adsorption, in countercurrent desorption by a substitution gas, and in scavenging by taking off a part of the flow circulating in the loop. The scavenging flow is recovered and combined with the substitution gas. The substitution gas may be in particular impure nitrogen supplyed by an air distillation apparatus producing the necessary oxygen.