The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1990
Filed:
Jul. 24, 1989
Graham W Scott, Northwich, GB;
Paul Gough, Runcorn, GB;
Brian N Hendy, Middlesbrough, GB;
Michael B Cinderey, Middlesbrough, GB;
Imperial Chemical Industries PLC, London, GB;
Abstract
A mixture of two or more gases is contacted with a surface of a gas separation membrane and a gas having a different composition is removed from the vicinity of an opposite surface of the membrane, where the membrane is formed from a sulphonated polyarylsulphone or polyarylketone. The membrane may be a dense film or may be an asymmetric membrane. The process is particularly suitable for the separation of hydrogen from a hydrogen/nitrogen mixture when separation factors considerably in excess of 100 may be achieved together with an acceptable permeability. The membrane is preferably formed from a sulphonated polyarylethersulphone, for example one having repeat units of the formula ##STR1## where Ph.sup.1 is a phenylene residue and at least some of the groups Ph.sup.1 are sulphonated and n is 1 or 2 and the value can differ along the polymer chain. Divalent metal salts give membranes of high permeability which have a good separation factor.