Method of producing pulp with high yield using a two-stage refin

Details Method of producing pulp with high yield using a two-stage refin Method of producing pulp with high yield using a two-stage refin

1997-09-18

1998-12-29

Chin, Peter

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Mechanical defibration in the presence of heated gas or gas...

162 24, 162 28, D21B 102

Patent

active

058535349

ABSTRACT:
A method of producing mechanical and chemi-mechanical pulp with a yield above 85 % from lignocellulose-containing material for the manufacture of paper or board products. The material is subjected to mechanical processing in at least two steps. The material at its feed into the first step has a temperature below the softening temperature of lignin. When the material is fed into at least one subsequent processing step, it shall have a temperature above the softening temperature of lignin.

REFERENCES:
patent: 4502918 (1985-03-01), Mackie et al.
G.M. Irvine, "The significance of the glass transition of lignin in thermomechanical pulping", Wood Sci. and Technol. 19(1985). pp. 139-149.
Modern Particle Board & Dry Process Fiberboard Manufacturing, T.M. Freeman, Inc., San Francisco 1977, pp. 238-243.
O. Suchsland and G. Wadson, "Fiberboard Manufacturing Practices", John Wiley & Sons, New York 1991, pp. 65-80.
H.G. Higgins et al., "Conditions for obtaining optimum properties of radiata . . . ", Appita vol. 32, No. 1 Jul. 1978, pp. 23-33.
N.L. Salmen et al., "The Fundamentals of Energy Consumption during Visoelastic and Plastic Deformation of Wood", Transactions of the Technical Section, Canadian Pulp and Paper Association, vol. 83, No. 12 Dec. 1982.
O. Suchsland, "Medium Density Fiberboard", Michigan State University for Tennessee Valley Authority Technical News 1329, Oct. 1978, pp. 23, 26-28 and 40.
R.C. Frances et al., "Thermomechanical Pulping Above the Glass Transaction Temperature", published by ESPRI, pp. 125-140.
W.E. Lunan et al., "High Pressure Refining and Brightening in Thermomechanical Pulping", 1983 Pulping Conference, pp. 239-253.
F. Peng and T. Granfeldt, "Changes in the Microstructure of Spruce Wood Chips After Screw Press Treatment", Journal of Pulp and Paper Science, vol. 22, No. 4, Apr. 1996, P.J140-J146.
1995 International Mechanical Pulping Conference, Jun. 12-15, 1995. Ottawa, Ontario, Canada, pp. 213-225.
Eriksen, J.T. Consequences Of Chip Quality For Process And Pulp Quality In TMP Production, International Mechanical Pulping Conference 1981, Oslo, Jun. 16-19, 1981, pp. 1-19.
Gagne et al. New Challenges For Quebec And Ontario Paper Company LTD., 1991 International Mechanical Pulping Conference, pp. 263-283.
Goring, D.A.I. Thermal Softening Of Lignin, Hemicellulose And Cellulose, Physical Chemistry Division, Pulp and Paper Research Institute of Canada, Dec. 1963, pp. T-517-T-527.
Huusari et al. An Ideal Combination For Uncoated High Quality Magazine Paper, International Mechanical Pulping Conference, Toronto, Ontario, Jun. 11-14, 1979, pp. 231-236.
Huusari et al. Start Up Experiences With The New Tandem TMP Heat Recovery System At Kaipola, International Mechanical Pulping Conference 1981, Oslo, Jun. 16-19, 1981, pp. 1-19.
Ulander, Eric. Double Benefit--Economy And Quality--With Twin Refiners At Hylte Bruks AB, International Mechanical Pulping Conference 1985, Stockholm, Sweden, May 6-10, 1985, pp. 120-127.

Affiliated with

Also associated with

Rating

Method of producing pulp with high yield using a two-stage refin 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 of producing pulp with high yield using a two-stage refin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing pulp with high yield using a two-stage refin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1420377