(19)

(11)

EP 0 096 685 A1

(12)

(43) Date of publication: 28.12.1983 Bulletin 1983/52 (21) Application number: 83900056.0 (22) Date of filing: 01.12.1982

(51) International Patent Classification (IPC):  B01D 53/ 04( . ) (86) International application number: PCT/GB1982/000340 (87) International publication number: WO 1983/001908 (09.06.1983 Gazette 1983/14)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 02.12.1981 GB 19810036335 (71) Applicant: OXYMASTER LIMITED West Midlands B75 5BD (GB)	(72) Inventors: GARDNER, Ian Richard West Midlands B75 5BD (GB) GASKELL, Noel Manchester (GB)