(19)
(11) EP 1 356 156 A2

(12)

(88) Date of publication A3:
10.04.2003

(43) Date of publication:
29.10.2003 Bulletin 2003/44

(21) Application number: 02709938.1

(22) Date of filing: 23.01.2002
(51) International Patent Classification (IPC)7D21C 11/00
(86) International application number:
PCT/CA0200/078
(87) International publication number:
WO 0205/9417 (01.08.2002 Gazette 2002/31)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 24.01.2001 US 263519 P

(71) Applicant: Pulp and PaperResearch Institute of Canada
Quebec H9R 3J9 (CA)

(72) Inventors:
  • VAN HEEK, Ronald, Peter
    Prince George, British Columbia V2N 6T3 (CA)
  • DORRIS, Gilles, Marcel
    Vimont, Laval, Québec H7K 1R5 (CA)
  • ULOTH, Victor, Charles
    Prince George, British Columbia V2N 5Y6 (CA)
  • PAGE, Natalie
    Laval, Québec H7L 6A7 (CA)
  • HU, Thomas, Qiuxiong
    Vancouver, British Columbia V5R 6G9 (CA)
  • LECLERC, Denys, Francois
    Vancouver, British Columbia V5S 4T3 (CA)

(74) Representative: Lamb, Richard Andrew et al
Urquhart-Dykes & Lord,New Priestgate House,57 Priestgate
Peterborough,Cambs. PE1 1JX
Peterborough,Cambs. PE1 1JX (GB)

   


(54) HEAT TREATMENT OF POLYSULPHIDE CONTAINING WHITE LIQUORS