(19)

(11)

EP 0 204 784 A1

(12)

(43) Date of publication: 17.12.1986 Bulletin 1986/51 (21) Application number: 86900117.0 (22) Date of filing: 09.12.1985

(51) International Patent Classification (IPC):  C10L 1/ 02( . ) (86) International application number: PCT/EP1985/000692 (87) International publication number: WO 1986/003511 (19.06.1986 Gazette 1986/13)

(84) Designated Contracting States: AT DE (30) Priority: 11.12.1984 IT 19840023994 (71) Applicant: SNAMPROGETTI S.p.A. I-20121 Milan (IT)	(72) Inventors: ROMANO, Ugo I-20059 Vimercate, Milan (IT) TERZONI, Giuseppe I-29100 Piacenza (IT) ANCILLOTTI, Francesco I-20097 San Donato Milanese, Milan (IT) GIAVAZZI, Fulvio I-20098 San Giuliano Milanese, Milan (IT) (74) Representative: Roggero, Sergio, et al  Ing. Barzanò & Zanardo Milano S.p.A. Via Borgonuovo 10 I-20121 Milano I-20121 Milano (IT)