Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2007-12-11
2007-12-11
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S025000, C162S068000, C162S082000
Reexamination Certificate
active
10100469
ABSTRACT:
The present invention is a method for producing pulp from fibrous lignocellulose material using a treatment step which exposes the material to oxalic acid, or oxalic acid and sodium bisulfite, prior to pulping. The pulping of the resulting product requires less energy input and provides a pulp having enhanced physical properties as compared to untreated materials.
REFERENCES:
patent: 1396227 (1921-11-01), Marr
patent: 3556110 (1971-01-01), Briskin et al.
patent: 3580311 (1971-05-01), Fox
patent: 3586537 (1971-06-01), Steiner et al.
patent: 3793279 (1974-02-01), Lipowski
patent: 3861402 (1975-01-01), Briskin
patent: 4106979 (1978-08-01), Ruffini et al.
patent: 4260452 (1981-04-01), Kruger et al.
patent: 4283252 (1981-08-01), Reinhall
patent: 4511433 (1985-04-01), Tournier et al.
patent: 4515657 (1985-05-01), Maslanka
patent: 4594130 (1986-06-01), Chang et al.
patent: 4599138 (1986-07-01), Lindahl
patent: 4851082 (1989-07-01), Mita et al.
patent: 5221357 (1993-06-01), Brink
patent: 5306392 (1994-04-01), Mita
patent: 5338402 (1994-08-01), Devic et al.
patent: 5460697 (1995-10-01), Akhtar et al.
patent: 5562803 (1996-10-01), Wang et al.
patent: 5593544 (1997-01-01), Fahlgren et al.
patent: 5853534 (1998-12-01), Hoglund et al.
patent: 6475338 (2002-11-01), Jiang et al.
patent: 1274680 (1990-10-01), None
patent: 1072746 (1993-06-01), None
patent: 2041566 (1972-02-01), None
patent: 1156365 (1969-06-01), None
patent: 1 534 344 (1978-12-01), None
patent: 2036826 (1980-07-01), None
patent: 103002/78 (1978-09-01), None
patent: 55607/79 (1979-05-01), None
patent: 85497/81 (1981-07-01), None
patent: 57047604 (1982-03-01), None
patent: 58084708 (1983-05-01), None
patent: 63264991 (1988-11-01), None
patent: 10331084 (1998-12-01), None
patent: 1420092 (1988-08-01), None
patent: 1567702 (1990-05-01), None
Abstract of CEH report on Oxalic Acid, http://www.sriconsulting.com/CEH/Public/Reports/682.1000/Abstract.html.
Akhtar Masood
Black Cory C.
Horn Eric G.
Houtman Carl J
Kirk T. K.
Biopulping International
Hug Eric
Quarles & Brady LLP
Wisconsin Alumni Research Foundation
LandOfFree
Method for producing pulp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing pulp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3885122