Process using transition metal complexes for the separation of dioxygen from a gas mixture by electrodecomplexation

US5296105A · kind A · utility

Assignee

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

Inventors

• Christian Amatore · Paris, FR
• Said Aziz · Le Mée-sur-Seine, FR
• Anny Jutand · Paris, FR
• Francois Draskovic · Fontenay-le-Fleury, FR
• Kenneth Yamaguchi · Laguna Beach, US
• Panayotis Cocolios · Rambouillet, FR

Key dates

• Filing date: Nov 6, 1991
• Grant date: Mar 22, 1994
• Expiry date: Nov 6, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B2210/0082
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for separating dioxygen from a gaseous mixture containing dioxygen, which entails: PA0 a) absorbing dioxygen by one or more transition metal complexes at a low oxidation state of the formula (A): EQU (L.sub.n (M.sup.+p).sub.m (X.sup.-z).sub.x.sup.mp-xz (A) PA0 the absorption causing formation of a peroxo dihapto deoxygenated product complex of the formula (B): EQU (L.sub.n '(M.sup.p+2 O.sub.2).sub.m' (X.sup.-z).sub.x).sup.m'p-x'z(B) PA0 b) desorbing oxygen from the complex by electrochemically oxidizing the peroxo dihapto product complex obtained by reaction of the complex of the formula (A) wiht O.sub.2 : and PA0 c) recovering the absorbed oxygen.