Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1992-07-15
1993-10-26
Jones, W. Gary
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
1621646, 1621682, 162DIG4, 435278, D21C 320
Patent
active
052562522
ABSTRACT:
A method of controlling pitch deposits in a pulp and papermaking process comprising adding lipase and a cationic polymer to a cellulosic slurry in amounts effective for diminishing pitch deposits from the cellulosic slurry in a pulp and/or paper mill. The method may include adding lipase and a cationic polymer to a cellulosic slurry in amounts effective for both reducing the triglyceride content of a cellulosic slurry by hydrolysis and diminishing the concentration of fatty acids released by the hydrolysis in the aqueous phase of a cellulosic slurry. The triglyceride hydrolysate content of the aqueous phase of a cellulosic slurry, formed by the action of lipase on triglyceride within the cellulosic slurry, is reduced when the amount of lipase and the amount of a cationic polymer is maintained for a time period sufficient to hydrolyze at least some of the triglyceride in the cellulosic slurry and reduce the triglyceride hydrolysate in the aqueous phase of the cellulosic slurry.
REFERENCES:
patent: 4913775 (1990-04-01), Langley et al.
patent: 4964955 (1990-10-01), Lamar et al.
Irie, Y. "Enzymatic Pitch Control in Papermaking System", TAPPI Papermakers Conf., Apr. 1990, pp. 1-10.
"Lipase/Esterase-pH-Stat Method on a Tributyrin Substrate," Novo Laboratories, Inc., prior to Aug. 23, 1991, pp. 1-14.
"Applications of Lipase Enzymes in Mechanical Pulp Production," 1991 Pulping Conference, TAPPI Proceedings, K. Gibson, pp. 775-780.
"Resinase.TM.A 2X," Novo Nordisk A/S, Denmark, Dec. 1990, pp. 1-3.
"On The Use of Resinase.TM.A for Pitch Control," M. Matsukura, Y. Fujita, H. Sakaguchi, Oct. 1990, pp. 1, 2, 5.
"Enzymatic Pitch Control in Papermaking System," 1990 Papermakers Conference, TAPPI Proceedings, Y. Irie, M. Usui, M. Matsukara, K. Hata, pp. 1-10.
"Understanding the Behavior of Pitch in Pulp and Paper Mills," D. Dreisbach, D. Michalopoulos, Tappi Journal, Jun. 1989, pp. 129-134.
"Reducing Troublesome Pitch in Pulp Mills by Lipolytic Enzymes," Feb. 1992 Tappi Journal, K. Fischer, K. Messner, pp. 130-134.
"Recent Advances in Enzymatic Pitch Control," 1992, Papermakers Conference, Y. Fujita, M. Matsukura, H. Awaji, H. Taneda, K. Hata, N. Shimoto, M. Sharyo, H. Sakaguchi, K. Gibson, pp. 73-79.
Literature Search No. 3818, Sep. 28, 1991, pp. 1-9.
Finck Martha R.
Sarkar Jawed M.
Barrett Joseph B.
Jones W. Gary
Miller Robert A.
Nalco Chemical Company
Nguyen Dean Tan
LandOfFree
Method for controlling pitch deposits using lipase and cationic 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 controlling pitch deposits using lipase and cationic , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling pitch deposits using lipase and cationic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-956396