(19)
(11) EP 0 569 526 A1

(12)

(43) Date of publication:
18.11.1993 Bulletin 1993/46

(21) Application number: 92906068.0

(22) Date of filing: 29.01.1992
(51) International Patent Classification (IPC): 
D21C( . )
C07D 307/ 50( . )
C08H 5/ 02( . )
D21C 9/ 10( . )
 C07D 307/ 48( . )
C07G 1/ 00( . )
D21C 3/ 20( . )
D21C 11/ 00( . )
(86) International application number:
PCT/US1992/000720
(87) International publication number:
WO 1992/013849 (20.08.1992 Gazette 1992/22)
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE

(30) Priority: 01.02.1991 US 19910649683

(71) Applicant: ALCELL TECHNOLOGIES INC.
Montreal, Quebec H3B 4W8 (CA)

(72) Inventors:
  • LORA, Jairo, H.
    Media, PA 19063 (US)
  • KATZEN, Raphael
    Cincinnati, OH 45208 (US)
  • CRONLUND, Malcolm
    Chester Springs, PA 19425 (US)
  • WU, Chih, Fae
    West Chester, PA 19380 (US)
  • GOPAL, Goyal, C.
    Mont Clare, PA 19453 (US)
  • WINNER, Stephen, R.
    Boothwyn, PA 19061 (US)
  • LEBLANC, Ron
    Calgary, Alberta T2P 3 (CA)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
D-80538 München
D-80538 München (DE)

   


(54) PULPING OF LIGNOCELLULOSIC MATERIALS AND RECOVERY OF RESULTANT BY-PRODUCTS