Paper making and fiber liberation – Apparatus – Digester
Patent
1994-03-08
1999-01-26
Alvo, Steven
Paper making and fiber liberation
Apparatus
Digester
162243, 162246, 422225, 422229, D21C 700, D21C 9153
Patent
active
058633898
ABSTRACT:
An apparatus for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine. The bleaching reactor is a horizontal vessel having a central rotatable shaft which preferably contains paddles, cut and folded screw flights or a ribbon flight, to disperse and advance the pulp particles in a plug flow manner while contacting and mixing the pulp particles with a gaseous bleaching agent such as ozone for substantially uniform bleaching thereof.
REFERENCES:
patent: 1591070 (1926-07-01), Wolf
patent: 1642978 (1927-09-01), Thorne
patent: 1643566 (1927-09-01), Thorne
patent: 1781712 (1930-11-01), Wallace
patent: 1818913 (1931-08-01), Van De Carr, Jr.
patent: 1957937 (1934-05-01), Campbell et al.
patent: 2013115 (1935-09-01), Thorne
patent: 2431478 (1947-11-01), Hill
patent: 2466633 (1949-04-01), Brabender et al.
patent: 3318657 (1967-05-01), Wade
patent: 3630828 (1971-12-01), Liebergott et al.
patent: 3660225 (1972-05-01), Verreyne et al.
patent: 3663357 (1972-05-01), Liebergott
patent: 3703435 (1972-11-01), Schleinofer
patent: 3725193 (1973-04-01), De Montigny et al.
patent: 3785577 (1974-01-01), Carlsmith
patent: 3814664 (1974-06-01), Carlsmith
patent: 3832276 (1974-08-01), Roymoulik et al.
patent: 3964962 (1976-06-01), Carlsmith
patent: 4046621 (1977-09-01), Sexton
patent: 4080249 (1978-03-01), Kempf et al.
patent: 4093056 (1978-06-01), Richter
patent: 4119486 (1978-10-01), Eckert
patent: 4123317 (1978-10-01), Fritzvold
patent: 4155806 (1979-05-01), Mannbro
patent: 4158597 (1979-06-01), Petersson
patent: 4196043 (1980-04-01), Singh
patent: 4216054 (1980-08-01), Bentvelzen et al.
patent: 4229252 (1980-10-01), Merredith
patent: 4274918 (1981-06-01), Zilka
patent: 4278496 (1981-07-01), Frtizvold
patent: 4279694 (1981-07-01), Fritzvold et al.
patent: 4283251 (1981-08-01), Singh
patent: 4298426 (1981-11-01), Torregrossa et al.
patent: 4363697 (1982-12-01), Markham et al.
patent: 4372812 (1983-02-01), Phillips
patent: 4426256 (1984-01-01), Johnson
patent: 4444621 (1984-04-01), Lindahl
patent: 4450044 (1984-05-01), Fritzvold et al.
patent: 4468286 (1984-08-01), Johnson
patent: 4563243 (1986-01-01), Koch et al.
patent: 4619733 (1986-10-01), Kooi
patent: 4640782 (1987-02-01), Burleson
patent: 4818339 (1989-04-01), Lamort
patent: 4913358 (1990-04-01), Sbaschingg et al.
patent: 4959124 (1990-09-01), Tsai
patent: 5164043 (1992-11-01), Griggs et al.
patent: 5181989 (1993-01-01), White et al.
patent: 5238501 (1993-08-01), Kappel et al.
Agrawal et al., Performance of Trough Paddle Mixing Conveying System for Treatment of Wheat Straw with Small Volumes of Liquids, p. 18.
Allison, R.W., "Effect of Ozone on High-Temperature Thermomechanical Pulp", Appita, vol. 32, No. (Jan. 1979) p. 279.
Allison, R.W., "Efficient Ozone and Peroxide Bleaching of Alkaline Pulps From Pinus Radiata," Appita, vol. 36, No. 1 (jul. 1982) p. 42.
Allison, "Production of Bleached Softwood Pulp by Low Pollution Processes", Wood Sci. Technol. 17, pp. 129-137 (1983).
Backlund, A., "A Progress Report on Continuous Digester Development", Paper Presented to the 21st EUCEPA International Conference-Torremolinos, Spain.
Balousek, "The Effects of Ozone Upon Lignin Model Containing the B-aryl Ether Linkage", Svensk Papperstidning, No. 9, 1981.
Carlberg et al., "Bleaching of Sulphite and Sulphate Pulps Using Conventional and Unconvential Sequences", TAPPI Proceedings 1982 Annual Meeting, p. 381.
Casey, J.P., "Bleaching: A Perspective", TAPPI Journal, vol. 66, No. 7 (Jul. 1983) p. 95.
Dyck, A.W.J., "New Advances in Mechanical Pulping", American Paper Industry (Spe. 1971) p. 21.
Eickeler, "Ozone Measurement with Detector Tubes".
Eriksson and Gierer, "Ozonation of Residual Lignin".
Fujii, et al., "Oxygen Pulping of Hardwoods," TAPPI, Alkaline Pulping/Secondary Fibers Conference (Washington, D.C., Nov. 7-10, 1977).
Gangolli, "The Uses of Ozone and Pulp in the Paper Industry".
Germgard and Sjorgren, "Ozone Prebleaching of a Modified-Cooked and Oxygen-Bleached Softwood Kraft Pulp", Svensk Papperstidning, No. 15, (1985).
Germgard et al., "Mathematical Models for Simulation and Control of Bleaching Stages", Nordic Pulp and Paper Research Journal, No. 1 (1987).
Gierer, "Chemistry of Delignification, Part 2: Reactions of Lignins During Bleaching", Word Science and Technology (1986).
Godsay and Pearce, "Physico-Chemical Properties of Ozone Oxidized Kraft Pulps", Oxygen Delignification (1984).
Grant, R.S., "Displacement Heating Trials With a New Process to Reduce Steam", TAPPI Journal (Mar. 1983) p. 120.
Gupta, et al., "U.S. Patent Prebleaching, Influence on Viscosity and Sheet Strength", TAPPI Symposium-Oxygen Delignification, p. 1 (1984).
Hill and Rice, "Handbook of Ozone Technology and Applications", Ann Arbor Science.
Hiraoka et al., "Two Dimensional Model Analysis of Flow Behavior of Highly Viscous Non-Newtonian Fluid in Agitated Vessel With Paddle Impeller", Journal of Chemical Eng. of Japan, p. 56.
Hiraoka et al., "Two Dimensional Model Analysis of Turbulent Flow in an Agitated Vessel With Paddle Impeller", Chem. Eng. Commun., p. 149.
Heimburger et al., "Kraft Mill Bleach Plant Effluents: Recent Developments Aimed at Decreasing Their Environmental Impact".
Heimburger et al., "Kraft Mill Bleach Plant Effluents: Recent Developments Aimed at Decreasing Their Environmental Impacr Part II", TAPPI Journal, p. 69 (Nov. 1988).
Katai and Schuerch, "Mechanism of Ozone Attack on Alpha-Methyl Glucoside and Cellulosic Materials".
Kibblewhite et al., "Effects of Ozone on the Fibre Characteristics of High-Temperature Thermomechanical Pulp", Proceedings of the 1979 International Mechanical Pulping Conference, p. 293.
Kratzl et al., "Reactions of Lignin and Lignin Model Compounds With Ozone", TAPPI, vol. 59, No. 11 (Nov. 1976) p. 86.
Leopold, B., "The Pulp Mill of the Future", Textile and Paper Chemistry and Technology, p. 239.
Leopold, B., "The Pulping Process--Opportunity or Headache?", Proceedings of IPC Conference, Paper Science and Technology, May 8-10, 1979.
Liebergott et al., "The Use of Ozone or Oxygen in the First Bleaching tage", Ozone: Science and Engineering, vol. 4, p. 109 (1982).
Liebergott, et al., "The Use of Ozone in Bleaching and Brightening Wood Pulps: Part I--Chemical Pulps" (TAPPI 1978), p. 90.
Liebergott, N., "Paprizone Process for Brightening and Strengthening Groundwood", Paper Trade Journal (Aug. 2, 1971) p. 28.
Liebergott, N., Technical Paper T214--"Sequential Treatment of Mechanical Pulps at High Consistency with H.sub.2 O.sub.2 and O.sub.3 -- The Paprizone Process-Effect on Pulp Brightness and Strength", Pulp and Paper Magazine of Canada, vol. 73, No. 9, (Sep. 1972) p. 70.
Liebergott, et al., "Bleaching a Softwood Kraft Pulp Without Chlorine Compounds", TAPPI Journal, p. 76 (Aug. 1984).
Liebergott, et al., "Bleaching a Softwood Kraft Pulp Without Chlorine Compounds", pp. 1-10.
Liebergott, et al., "Comparison Between Oxygen and Ozone Delignification in the Bleaching of Kraft Pulps", TAPPI Proceedings--1981 Pulping Conference, p. 157.
Liebergott et al., "Ozone Delignification of Bleach Spruce and Hardwood Kraft, Kraft Anthraquinone, and Soda-Anthraquinone", TAPPI, vol. 64, No. 6 (Jun. 1981) p. 95.
Lindholm, "Effect of Heterogeneity in Pulp Bleaching with Ozone", Paperi ja Puu, (Apr. 1986).
Lindholm, "Effect of Pulp Consistency and pH in Ozone Bleaching", Part I.
Lindholm, "Effect of Pulp Consistency and pH in Ozone Bleaching; Part 2", International Oxygen Delignification Conference (1987).
Lindholm, "Effect of Pulp Consistency and pH in Ozone Bleaching", Paperi ja Puu, (Mar. 1987), Part IV.
Lindquist et al., "Ozone Bleaching of Sulfite Pulps", TAPPI Proceedings of the 1982 International Sulfite Pulping Conference, p. 127.
Lindquist, "Ozone Bleaching of Sulfite Pulps", Svensk Papperstidning (Nov. 6, 1984) p. 54.
Loras et al., "Bleaching of Sulphite Pulps With Oxygen and Ozone", Report of 1982 International Pulp Bleaching Conference, p.45.
Loras, V., "Bleachability of Mechanical Pulp", TAPPI , vol. 57, No. 2 (Feb. 1974) p. 98.
Mbachu et al., "The Effect of Acetic and Formic Acid Pretreatment on Pulp Bleaching
Friend William H.
Gandck Thomas P.
Pikulin Michael A.
White David E.
Alvo Steven
Union Camp Patent Holding, Inc.
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