Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1997-11-26
2000-04-11
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
162163, 1621641, 1621681, 1621683, 1621682, 162183, D21H 2110
Patent
active
060484381
ABSTRACT:
A method for increasing the separation of solids from an aqueous slurry containing such solids is disclosed. The separation process is particularly useful in the separation of the solid components of a papermill furnish from water in the manufacture of paper. The method comprises the steps of adding to a paper mill slurry from about 0.003 to about 1.0% by weight based on total solids in the slurry of a phenolic enhancer and a nonionic (meth)acrylamide homopolymer methacrylamide, or anionic or cationic flocculant is added to the slurry in an amount of from about 0.003 to about 0.5% by weight based on total solids in the slurry. Addition order is non-critical. The flocculation of solid components of the paper mill slurry is increased leading to improved retention of filler and fiber on the sheet and increased drainage of water from the cellulosic sheet produced. The method is also applicable to the treatment of waste waters, mineral tailings, oily waste waters, municipal and industrial wastes, and the like.
REFERENCES:
patent: 4070236 (1978-01-01), Carrard et al.
patent: 4238595 (1980-12-01), Girgis
patent: 4388150 (1983-06-01), Sunden et al.
patent: 4643801 (1987-02-01), Johnson
patent: 4753710 (1988-06-01), Langley et al.
patent: 4772359 (1988-09-01), Linhart et al.
patent: 4913775 (1990-04-01), Langley et al.
Database WPI, Section Ch, Week 8017, Derwent Publication, Ltd., London, GB; Class A97, AN 80-30624C, XP002024575 & SU 681 141 A (Leningrad Cell-Paper Ins), Aug. 29, 1979, abstract.
APPT A 83-90, 1995.
Retention Improvement in Difficult Furnishes-K.R. Stack/L.A. Dunn, APPITA Annual General conference, 83-90, 1995.
Newsprint Papermachine Trials with Polyoxyethylene as a Wet-End Additve, R.H. Pelton, C.H. Tay, L.H. Allen, Journal of Pulp and Pper Science: Jan. 1984, J5-J11.
The Use of Retention Aids in Newsprint Manufacture, A. Barnes, R. Coghill, D. Thurley, Appita, 42(5), 373-375 (1989).
Effect of Eucalpyt Pulp Extractives on the Retention Performance of Polyethylene Oxide and Phenolformaldehyde Resin, K. R. Stack, L. A. Dunn, N. K. Roberts-Appita 45(3), 189-192 (1992).
Evaluation of Various Phenolformaldehyde Resins in the Phenolformaldehyde Resin-Polyethyleneoxide Dual Retention Aid System, Journal of Wood Chemistry and Technology, 13(2), 283-308 (1993).
Study of the Interaction Between Poly(Ethylene Oxide) and Phenol-Formaldehyde Resin, K. Stack, L. Dunn, N. Roberts, Colloids and Surfaces, 61 (1991) 205-218.
Mechanisms of Fines Retention by Polyethylene Oxide in Newsprint Furnishes, L. Rahman, C.H. Tay, Tappi, 69/(4), 100-105, 1986.
Application of Polymeric Flocculant in Newsprint Stock Systems for Fines Retention Improvement, C. H. Tay, Tappi, vol. 63, No. 6, 63-66, 1980.
Newsprint Mill Experience with Wet End Double Polymer Addition for Retention Improvement, S. Shastri, Papermakers Conference, 205-210, 1983.
Jakubowski Regina
Lin Jeff F.
Pruszynski Przemyslaw
Rosencrance Scott W.
Shawki Shamel M.
Breininger Thomas M.
Brumm Margaret M.
Chin Peter
Nalco Chemical Company
LandOfFree
Method to enhance the performance of polymers and copolymers of 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 to enhance the performance of polymers and copolymers of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to enhance the performance of polymers and copolymers of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1173971