(19)

(11)

EP 0 454 715 A1

(12)

(43) Date of publication: 06.11.1991 Bulletin 1991/45 (21) Application number: 90901842.0 (22) Date of filing: 17.01.1990

(51) International Patent Classification (IPC):  B01D 46/ 00( . ) B01D 46/ 46( . ) B01D 51/ 00( . ) B01D 51/ 10( . ) B01D 46/ 12( . ) B01D 50/ 00( . ) B01D 51/ 02( . ) F26B 25/ 00( . ) (86) International application number: PCT/GB1990/000071 (87) International publication number: WO 1990/007969 (26.07.1990 Gazette 1990/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 17.01.1989 GB 19890000921 (71) Applicant: ENVIRONMENTAL POLLUTION CONTROL LIMITED Westwood, Nottingham NG5 3LZ (GB)	(72) Inventor: GENT, David, Victor Nottingham NG4 4PN (GB) (74) Representative: Dealtry, Brian, et al  Eric Potter & Clarkson St. Mary's Court St. Mary's Gate Nottingham NG1 1LE Nottingham NG1 1LE (GB)