(19)

(11)

EP 3 191 566 A2

(12)

(88) Date of publication A3: 26.05.2016 (43) Date of publication: 19.07.2017 Bulletin 2017/29 (21) Application number: 15778878.7 (22) Date of filing: 10.09.2015

(51) International Patent Classification (IPC):  C10L 1/14(2006.01) C10L 10/02(2006.01) C10L 10/06(2006.01) C10L 1/198(2006.01) C10L 1/238(2006.01) C10L 10/04(2006.01) C10L 1/2383(2006.01) (86) International application number: PCT/EP2015/070689 (87) International publication number: WO 2016/038128 (17.03.2016 Gazette 2016/11)

(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 Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 11.09.2014 GB 201416088 (71) Applicant: BP Oil International Limited Sunbury on Thames, Middlesex TW16 7BP (GB)	(72) Inventors: ALLAN, Robert Edward Sunbury-on-Thames Middlesex TW16 7BP (GB) WILLIAMSON, David Michael Sunbury-on-Thames Middlesex TW16 7BP (GB) (74) Representative: BP Global Patents  BP International Limited Global Patents & Technology Law Chertsey Road Middlesex Sunbury-on-Thames TW16 7LN Sunbury-on-Thames TW16 7LN (GB)