(19)
(11) EP 0 418 201 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.09.1992 Bulletin 1992/39

(43) Date of publication A2:
20.03.1991 Bulletin 1991/12

(21) Application number: 90810681.8

(22) Date of filing: 10.09.1990
(51) International Patent Classification (IPC)5: C12N 9/00, D21C 9/10, C02F 3/34, C12S 3/08, C12S 13/00
(84) Designated Contracting States:
CH DE ES FR GB IT LI SE

(30) Priority: 12.09.1989 GB 8920595
12.09.1989 GB 8920596

(71) Applicants:
  • SANDOZ LTD.
    CH-4002 Basel (CH)

    CH ES FR GB IT LI SE 
  • SANDOZ-PATENT-GMBH
    D-79539 Lörrach (DE)

    DE 

(72) Inventors:
  • Gysin, Beat
    Harrogate, North Yorkshire HG1 4TE (GB)
  • Griessmann, Theophile
    F-68870 Bartenheim (FR)


(56) References cited: : 
   
       


    (54) Bleaching wood pulp with enzymes


    (57) Wood pulp may be delignified enzymatically with very good results when treating it with a lignin peroxidase in the absence of a peroxide and when the enzyme is firstly chemically modified in such a way that it does not adsorb to the pulp.





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