Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber
Reexamination Certificate
2006-01-31
2006-01-31
Fortuna, José A. (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With chemical or physical modification of liberated fiber
C162S063000, C162S090000, C162S181400, C162S182000, C162S183000, C162S158000
Reexamination Certificate
active
06991705
ABSTRACT:
The invention relates to a process for stabilizing the pH of a pulp suspension with buffering agents and to a process for producing paper from a stabilized pulp suspension. The alkalinity of the pulp suspension is increased by a combination of an alkali metal hydroxide feed and a carbon dioxide feed. Said feeds provide a significant buffering effect which stablilizes the pH of said pulp suspension for the paper making process.
REFERENCES:
patent: 5378322 (1995-01-01), Hornsey
patent: 6086714 (2000-07-01), Plaskon et al.
patent: 2003/0150570 (2003-08-01), Leino et al.
patent: 2004/0238455 (2004-12-01), Leino
patent: 1288906 (1991-09-01), None
patent: 0 281 273 (1988-09-01), None
patent: 815247 (1959-06-01), None
patent: WO 8804705 (1988-06-01), None
patent: WO 90/09483 (1990-08-01), None
Ostberg et al., 5th Internatl. Conf. on New Avail. Technique-Stockholm, “Use of Carbon Dioxide in the Production of Sulfate Pulp,” Jun. 1996, pp. 508-515.
Gullichsen et al. (eds.), In: Papermaking Science & Technology, “Papermaking Chemistry,” book 4, 1999, p. 192.
Holmberg Anna Linnea
Leino Hannu Juhani
Aga Aktiebolag
Fortuna Jos'e A.
Pearne & Gordon LLP
LandOfFree
Process for stabilizing the PH of a pulp suspension and for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for stabilizing the PH of a pulp suspension and for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for stabilizing the PH of a pulp suspension and for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3568699