(19)
(11) EP 0 960 235 A1

(12)

(43) Date of publication:
01.12.1999 Bulletin 1999/48

(21) Application number: 98900506.0

(22) Date of filing: 19.01.1998
(51) International Patent Classification (IPC): 
D21C 9/ 10( . )
D21C 9/ 147( . )
(86) International application number:
PCT/CA1998/000020
(87) International publication number:
WO 1998/031872 (23.07.1998 Gazette 1998/29)
(84) Designated Contracting States:
AT DE FI SE

(30) Priority: 21.01.1997 US 19970786216

(71) Applicant: UNIVERSITY OF NEW BRUNSWICK
Fredericton, New Brunswick E3B 5A3 (CA)

(72) Inventors:
  • NI, Yonghao
    Fredericton, New Brunswick E3C 1M1 (CA)
  • VAN HEININGEN, Adriaan, R., P.
    Mouth of Keswick, New Brunswick E0H 1N0 (CA)
  • KANG, Guo, Jun
    Fredericton, New Brunswick E3B 2T5 (CA)
  • SKOTHOS, Anastasios
    Montreal, Quebec H1Z 3H8 (CA)

(74) Representative: Schwarzensteiner, Marie-Luise, et al 
Grape & Schwarzensteiner Patentanwälte Sebastiansplatz 7
80331 München
80331 München (DE)

   


(54) OXYGEN DELIGNIFICATION PROCESS OF PULP