EP 0281273 A1 19880907 - Cellulosic pulp.
Title (en)
Cellulosic pulp.
Title (de)
Zellstoff.
Title (fr)
Pâte cellulosique.
Publication
Application
Priority
- US 1983187 A 19870227
- US 14675188 A 19880121
Abstract (en)
Carbon dioxide in the gaseous phase is introduced through an injection assembly 25 into an alkaline delignified cellulosic pulp under conditions to adjust and maintain at from about 8.5 to 6.5 the pH of the pulp stream prior to introduction into a pulp refiner where it is fibrilated. Gaseous carbon dioxide is also introduced into the fibrilated pulp by means of an injection assembly 60 so as to maintain the pH of the pulp between 7.0 and 5.5 upstream of a paper making machine 10.
IPC 1-7
IPC 8 full level
D21C 9/00 (2006.01); D21D 1/20 (2006.01); D21H 23/08 (2006.01); D21H 17/65 (2006.01)
CPC (source: EP)
D21H 23/08 (2013.01); D21H 17/65 (2013.01)
Citation (search report)
- [X] US 2114809 A 19380419 - RAWLING FRANCIS G
- [X] US 1993265 A 19350305 - DYER COLVER P
- [A] DE 235821 C
- [A] US 3112242 A 19631126 - JONES HAROLD L
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0281273 A1 19880907; EP 0281273 B1 19930721; AU 1175188 A 19880901; DE 3882395 D1 19930826; DE 3882395 T2 19931202; FI 880918 A0 19880226; FI 880918 A 19880828; JP 2582838 B2 19970219; JP S6445887 A 19890220; NO 880763 D0 19880222; NO 880763 L 19880829
DOCDB simple family (application)
EP 88301311 A 19880217; AU 1175188 A 19880216; DE 3882395 T 19880217; FI 880918 A 19880226; JP 4404588 A 19880226; NO 880763 A 19880222