Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With testing – sampling or analyzing
Patent
1997-01-27
1998-04-07
Czaja, Donald E.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With testing, sampling or analyzing
162198, 162238, D21C 712
Patent
active
057360049
ABSTRACT:
A process control method for adjusting chemical application in response to the pulp brightness and/or lignin content is realized by utilizing a coupled control feedforward, feedback or combination feedforward/feedback control system, wherein brightness measurements are made between successive lignin content measurements and adjustments made to the chemical application in response to a comparison value.
REFERENCES:
patent: 3607623 (1971-09-01), Chappelle
patent: 3617717 (1971-11-01), Smith
patent: 3650890 (1972-03-01), Kamio
patent: 3729375 (1973-04-01), Chappelle
patent: 3962029 (1976-06-01), Wettermark et al.
patent: 3968006 (1976-07-01), Zimmerman
patent: 3980517 (1976-09-01), MacTaggart
patent: 4013506 (1977-03-01), Histed et al.
patent: 4155806 (1979-05-01), Mannbro
patent: 4198266 (1980-04-01), Kirk et al.
patent: 4248662 (1981-02-01), Wallick
patent: 4278496 (1981-07-01), Fritzvold
patent: 4279694 (1981-07-01), Fritzvold et al.
patent: 4348256 (1982-09-01), Bergstrom et al.
patent: 4372812 (1983-02-01), Phillips et al.
patent: 4384920 (1983-05-01), Markham et al.
patent: 4431480 (1984-02-01), Markham et al.
patent: 4459174 (1984-07-01), Papageorges et al.
patent: 4595455 (1986-06-01), Mannbro
patent: 4619733 (1986-10-01), Kooi
patent: 4840703 (1989-06-01), Malmsten
patent: 4978425 (1990-12-01), Beller et al.
patent: 5173153 (1992-12-01), Terrett et al.
patent: 5174861 (1992-12-01), White et al.
patent: 5181989 (1993-01-01), White et al.
patent: 5403441 (1995-04-01), McDonald
Kappel et al. "High-contsistency ozone-bleaching technology". Tappi Journal. 1994. vol. 77, No. 6, pp. 109-116.
Patt et al, "Use of Ozone for Pulp Bleaching," 42(10A): V14-23 (Oct. 1988).
Seymour et al, "Testing and Control in Bleach Plants," Bleaching of Pulp, TAPPI, 3rd Edition, p. 478. 1979.
M. Ollila, "Chemical Pulp Bleaching Control Based on Inline Brightness and Residual Measurements Before and After Stage," TAPPI Proceedings, 1988 Pulping Conference, pp. 603-608, 1988.
White et al., "Importance of Reactor Design in High Consistency Ozone Bleach," Pulp & Paper Canada, vol. 94, No. 9, pp. 242-247 (1993).
R.P. Singh, "Ozone Replaces Chlorine in the First Bleaching Stage," TAPPI, vol. 64, No. 2, pp. 45-48 (Feb. 1982).
U. Germgard et al., "Ozone Prebleaching of a Modified-Cooked and Oxygen-Bleached Softwood Kraft Pulp," Svensk Papperstidning, No. 15, 1985, pp. 127-132.
Liebergott et al., "O.sub.2, O.sub.3 and Peroxide", Seminar Notes, 1978, Pulping and Bleaching Seminar, pp. 90-105.
Singh, "Computer Control", The Bleaching of Pulp, TAPPI Press, 1979, pp. 503-513.
Burnett, "Computer Control of the Chlorine Stage", Pulp and Paper Magazine of Canada, vol. 71, No. 14, Jul. 17, 1970, pp. 57-62.
K.H. Ferguson, "Union Camp Begins Ozone Era with New Kraft Bleaching Line at Franklin, Va.," Nov. 1992, pp. 42-55, Pulp & Paper.
F.G. Shinskey, Process Control Systems--Application, Design, and Tuning, Third Edition, pp. 4-7, 10-11, 14-15, 18-19, 42-43, 120-121, 1988, McGraw-Hill.
A.G. Jamieson et al., "Washing System," May 1973, pp. 187-191, Svensk Papperstidning.
B.S. Kirk et al., "Low-Consistency Oxygen Delignification in a Pipeline Reactor," 1978, pp. 77-80, Tappi, vol. 61, No. 5.
H.deV. Partridge, "Pulp & Paper Technology: New Pulp Bleaching Developments," pp. 45-50, Jun. 1976, CEP.
J.K. Perkins et al., "Advances in Ozone Bleaching--Part III," pp. 263-266.
G.A. Smook, Handbook for Pulp and Paper Technologists, pp. 154-172, TAPPI.
John S. Fujii et al., "Oxygen Pulping of Hardwoods," pp. 1-12.
G.A. Smook, Handbook of Pulp & Paper Technologists, Joint Executive Committee of the Vocational Education Committees of the Pulp and Paper Industry, pp. 160-164 (1982).
Soai et al., "Catalytic Asymmetric Induction Highly Enationselective Addition of Dialkylzincs to Aldehydes Using Chiral Pyrrolidinylmethanols and Their Metal Salts", J. Am. Chem. Soc., vol. 109, pp. 7111-7115 (1987).
Bosch Gregory J.
Falcone, Jr. Ronald A.
Mayo William L.
Pangalos George
Chong Suet M.
Czaja Donald E.
Leavitt Steven B.
Nath Gary M.
Union Camp Patent Holding, Inc.
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