(19)

(11)

EP 3 472 097 A1

(12)

(43) Date of publication: 24.04.2019 Bulletin 2019/17 (21) Application number: 17732408.4 (22) Date of filing: 21.06.2017

(51) International Patent Classification (IPC):  C01B 17/54(2006.01) C01B 17/775(2006.01) C01B 17/765(2006.01) (86) International application number: PCT/EP2017/065246 (87) International publication number: WO 2017/220656 (28.12.2017 Gazette 2017/52)

(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 MD (30) Priority: 21.06.2016 IT UA20164559 (71) Applicant: Saipem S.p.A. 20097 San Donato Milanese (Milano) (IT)	(72) Inventor: BRUNO, Lorenzo I-20097 San Donato Milanese (MI) (IT) (74) Representative: Croce, Valeria  Jacobacci & Partners S.p.A. Via Senato, 8 20121 Milano 20121 Milano (IT)