Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2006-08-01
2006-08-01
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S065000, C162S067000, C162S078000
Reexamination Certificate
active
07083704
ABSTRACT:
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) and a narrow molecular weight distribution. Further, the present invention provides processes for making compositions, useful for making lyocell fibers, by contacting an alkaline pulp having a high hemicellulose content of at least about 7% with an oxidant sufficient to reduce the average degree of polymerization to about 200 to 1100 without substantially reducing the hemicellulose content or increasing the copper number of the pulp.
REFERENCES:
patent: 2978446 (1961-04-01), Battista et al.
patent: 3023104 (1962-02-01), Battista
patent: 3141875 (1964-07-01), Battista et al.
patent: 3251824 (1966-05-01), Battista
patent: 3255071 (1966-06-01), Kleinert
patent: 3388119 (1968-06-01), Cruz
patent: 3539365 (1970-11-01), Durand et al.
patent: 3632469 (1972-01-01), Wilder
patent: 3652385 (1972-03-01), Noreus et al.
patent: 3652386 (1972-03-01), Noreus et al.
patent: 3652387 (1972-03-01), Wilder
patent: 3833438 (1974-09-01), Kaneko et al.
patent: 3974251 (1976-08-01), Cremer et al.
patent: 4142913 (1979-03-01), McCorsley et al.
patent: 4144080 (1979-03-01), McCorsley
patent: 4145532 (1979-03-01), Franks et al.
patent: 4159345 (1979-06-01), Takeo et al.
patent: 4196282 (1980-04-01), Franks et al.
patent: 4211574 (1980-07-01), McCorsley et al.
patent: 4246221 (1981-01-01), McCorsley
patent: 4256613 (1981-03-01), Franks et al.
patent: 4290815 (1981-09-01), Henry
patent: 4295925 (1981-10-01), Bentvelzen et al.
patent: 4295926 (1981-10-01), Bentvelzen et al.
patent: 4295927 (1981-10-01), Bentvelzen et al.
patent: 4298426 (1981-11-01), Torregrossa et al.
patent: 4324593 (1982-04-01), Varga
patent: 4338158 (1982-07-01), Bentvelzen
patent: 4372811 (1983-02-01), Samuelson et al.
patent: 4416698 (1983-11-01), McCorsley
patent: 4426228 (1984-01-01), Brandner et al.
patent: 4581072 (1986-04-01), Laity
patent: 4634470 (1987-01-01), Kamide et al.
patent: 4939016 (1990-07-01), Radwanski et al.
patent: 5094690 (1992-03-01), Zikeli et al.
patent: 5189152 (1993-02-01), Hinterholzer et al.
patent: 5216144 (1993-06-01), Eichinger et al.
patent: 5260003 (1993-11-01), Nyssen et al.
patent: 5277857 (1994-01-01), Nicholson et al.
patent: 5310424 (1994-05-01), Taylor
patent: 5330567 (1994-07-01), Zikeli et al.
patent: 5362867 (1994-11-01), Chin et al.
patent: 5370322 (1994-12-01), Gray et al.
patent: 5401304 (1995-03-01), Wykes et al.
patent: 5401447 (1995-03-01), Matsui et al.
patent: 5403530 (1995-04-01), Taylor
patent: 5413631 (1995-05-01), Gray et al.
patent: 5417909 (1995-05-01), Michels et al.
patent: 5421525 (1995-06-01), Gray et al.
patent: 5453194 (1995-09-01), Klein
patent: 5486230 (1996-01-01), Kalt et al.
patent: 5507983 (1996-04-01), Sellars et al.
patent: 5520869 (1996-05-01), Taylor
patent: 5527178 (1996-06-01), White et al.
patent: 5540874 (1996-07-01), Fukui et al.
patent: 5543101 (1996-08-01), Ruf et al.
patent: 5543511 (1996-08-01), Bergfeld et al.
patent: 5545371 (1996-08-01), Lu
patent: 5556452 (1996-09-01), Kalt et al.
patent: 5562739 (1996-10-01), Urben
patent: 5580354 (1996-12-01), Taylor
patent: 5580356 (1996-12-01), Taylor
patent: 5582783 (1996-12-01), Zikeli et al.
patent: 5582786 (1996-12-01), Brunskill et al.
patent: 5582843 (1996-12-01), Sellars et al.
patent: 5587238 (1996-12-01), Meraldi et al.
patent: 5589125 (1996-12-01), Zikeli et al.
patent: 5591388 (1997-01-01), Sellars et al.
patent: 5593705 (1997-01-01), Schilo et al.
patent: 5601765 (1997-02-01), Sellars et al.
patent: 5601767 (1997-02-01), Firgo et al.
patent: 5601771 (1997-02-01), Ruf
patent: 5603883 (1997-02-01), Zikeli
patent: 5605567 (1997-02-01), Lancaster
patent: 5607639 (1997-03-01), Zikeli et al.
patent: 5609957 (1997-03-01), Page et al.
patent: 5618483 (1997-04-01), Weigel et al.
patent: 5626810 (1997-05-01), Zikeli et al.
patent: 5628941 (1997-05-01), Kalt et al.
patent: 5634914 (1997-06-01), Wilkes et al.
patent: 5639484 (1997-06-01), White et al.
patent: 5651794 (1997-07-01), Taylor
patent: 5652001 (1997-07-01), Perry et al.
patent: 5653931 (1997-08-01), Eibl et al.
patent: 5656224 (1997-08-01), Zikeli et al.
patent: 5662858 (1997-09-01), Firgo et al.
patent: 5676795 (1997-10-01), Wizani et al.
patent: 5679146 (1997-10-01), Kalt et al.
patent: 5690874 (1997-11-01), Bell et al.
patent: 5693296 (1997-12-01), Holtzapple et al.
patent: 5695377 (1997-12-01), Tribes et al.
patent: 5709716 (1998-01-01), Taylor
patent: 5725821 (1998-03-01), Gannon et al.
patent: 5759210 (1998-06-01), Potter et al.
patent: 5760211 (1998-06-01), Schleicher et al.
patent: 5762797 (1998-06-01), Patrick et al.
patent: 5766530 (1998-06-01), Kalt et al.
patent: 5779737 (1998-07-01), Potter et al.
patent: 5788939 (1998-08-01), Mulleder et al.
patent: 5795522 (1998-08-01), Firgo et al.
patent: 5977346 (1999-11-01), Saka et al.
patent: 5985097 (1999-11-01), Samuelsson
patent: 6001303 (1999-12-01), Haynes et al.
patent: 6042769 (2000-03-01), Gannon et al.
patent: 6057438 (2000-05-01), Hyatt et al.
patent: 6183865 (2001-02-01), Yabuki et al.
patent: 6197230 (2001-03-01), Pierre et al.
patent: 6210801 (2001-04-01), Luo et al.
patent: 6221487 (2001-04-01), Luo et al.
patent: 6235392 (2001-05-01), Luo et al.
patent: 6306334 (2001-10-01), Luo et al.
patent: 6331354 (2001-12-01), Sealey, II et al.
patent: 6491788 (2002-12-01), Sealey et al.
patent: 2071185 (1992-12-01), None
patent: 0 785 304 (1997-07-01), None
patent: 2735794 (1996-12-01), None
patent: 2 337 957 (1999-08-01), None
patent: 6-220213 (1994-08-01), None
patent: 623 4881 (1994-08-01), None
patent: HEI 6-16222 (1995-08-01), None
patent: WO 94/28218 (1994-12-01), None
patent: WO 95/21901 (1995-08-01), None
patent: WO 95/33883 (1995-12-01), None
patent: WO 95/35399 (1995-12-01), None
patent: WO 95/35400 (1995-12-01), None
patent: WO 96/12063 (1996-04-01), None
patent: WO 96/25552 (1996-08-01), None
patent: WO 96/27700 (1996-09-01), None
patent: WO 97/15713 (1997-05-01), None
patent: WO 97/30196 (1997-08-01), None
patent: WO 98/02662 (1998-01-01), None
patent: WO 98/07911 (1998-02-01), None
patent: WO 98/26122 (1998-06-01), None
patent: WO 98/30740 (1998-07-01), None
patent: 99/16960 (1999-04-01), None
patent: WO 99/16960 (1999-04-01), None
patent: WO 98/22642 (1999-05-01), None
patent: WO 99/47733 (1999-09-01), None
patent: WO 99/47733 (1999-09-01), None
patent: WO 00/34568 (2000-06-01), None
patent: WO 01/88236 (2001-11-01), None
Bianchi, M.L., et al., “Bleaching of Commercial Pulps with H2O2Catalyzed by Heteropolyacids,”Bioresource Technology 68(1):17-21, Apr. 1999.
Balk, H., and B. Kunze, “Use of Spinbonding and Melt Blown Microfiber Technology for Filter Media,”Proceedings of the TAPPI Nonwoven Conference, Macro Island, Fla., 1991, pp. 287-297.
Boman, R., et al., “Transition Metal Removal Before a (PO) Stage in ECF Sequences,”Proceedings of the TAPPI International Pulp Bleaching Conference, Washington, D.C., 1996, pp. 281-285.
Bouchard, J., et al., “A Comparison Between Acid Treatment and Chelation Prior to Hydrogen Peroxide Bleaching of Kraft Pulps,”Pulp and Paper Research Institute of Canada, 1993.
Chang, H.-M., et al., “Delignification of High-Yield Pulps With Oxygen and Alkali,”Technical Association of the Pulp and Paper Industry 57(5):123-126, May 1974.
Chanzy, H., et al., “Dissolution and Spinning of Exploded Wood in Amine Oxide Systems,” in Kennedy, J.F., et al. (eds.),Wood and Cellulosics: Industrial Utilization, Biotechnology, Structure and Properties, Ellis Harwood Ltd., Chichester, U.K., 1987, pp. 573-579.
Chanzy, H., et al., “Spinning of Exploded Wood From Amine Oxide Solutions,”Polymer Communications 27:171-172, 1986.
Coetzee, B., “Continuous Sapoxal Bleaching—Operating, Technical Experience,”Pulp Paper Mag. Can. 75(6):T223-T228, Jun. 1974.
Cole, D.J., “Courtaulds Tencel Fibre in Apparel Fabrics,”Courtaulds Fibres, May 1992.
Eichi
Luo Mengkui
Neogi Amar N.
Persinger, Jr. W. Harvey
Roscelli Vincent A.
Sealey, II James E.
Christensen O'Connor Johnson & Kindness
Hug Eric
Weyerhaeuser Company
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