(19)

(11)

EP 2 601 133 A1

(12)

(43) Date of publication: 12.06.2013 Bulletin 2013/24 (21) Application number: 11746282.0 (22) Date of filing: 02.08.2011

(51) International Patent Classification (IPC):  C01B 7/01(2006.01) A62D 3/19(2007.01) F23G 5/08(2006.01) C01B 7/07(2006.01) (86) International application number: PCT/GB2011/001160 (87) International publication number: WO 2012/017200 (09.02.2012 Gazette 2012/06)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 02.08.2010 GB 201012985 (71) Applicant: Tetronics(International) Limited Swindon, Wiltshire SN3 4DE (GB)	(72) Inventors: DEEGAN, David Bampton Oxfordshire OX18 2NR (GB) ZHANG, Fan Swindon Wiltshire SN3 5AL (GB) (74) Representative: Setna, Rohan P.  Boult Wade Tennant Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)