Method of producing high yield chemimechanical pulps

Details Method of producing high yield chemimechanical pulps Method of producing high yield chemimechanical pulps

1977-10-03

1978-09-26

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With plural or specified mechanical defibering step

162 38, 162 56, 162 61, 162 71, 162 83, 162 84, 162 86, D21C 306, D21C 312, D21C 326

Patent

active

041167589

ABSTRACT:
A process for producing high yield chemimechanical pulps from woody lignocellulosic material, such as wood chips, whereby the material is treated with an aqueous solution of a mixture of sulfite and bisulfite, said solution being of sufficient strength to sulfonate said material to at least about 85% of the maximum level of sulfonation that can be achieved on said material without reducing the pulp yield to below 90% and subjecting the resulting sulfonated material to mechanical defibration.

REFERENCES:
patent: 1821198 (1931-09-01), Zimmerman
patent: 1859847 (1938-05-01), Rue
patent: 2847304 (1958-08-01), Rasch
patent: 2893909 (1959-07-01), Shouvlin et al.
patent: 2949395 (1960-08-01), Von Hazmburg
patent: 2962412 (1960-11-01), Richardson
patent: 3003909 (1961-10-01), Olson
patent: 3013931 (1961-12-01), Wethern et al.
patent: 3013934 (1961-12-01), Aitken et al.
patent: 3078208 (1963-02-01), Cederquist
patent: 3446699 (1969-05-01), Asplund et al.
patent: 3558428 (1971-01-01), Asplund et al.
patent: 3597310 (1971-08-01), Sumi et al.
patent: 3607618 (1971-09-01), Uschmann et al.
patent: 3741005 (1973-06-01), Dauth et al.
Richardson, "Ultra High Yield NSCM Pulping", TAPPI, vol. 45, No. 12, 1a-p962, pp.139A-142A.
Mitchell et al., "Role of Base in Sulfite Pulping", PPMC, 3-1936, pp. 195-198 & 209; 162-183.
Richardson et al., "Supergroundwood from Aspen", TAPPI, vol. 48, No. 6, pp. 344-346 (1965).
Chidester et al., "Chemiechemical Pulps from Various Softwoods & Hardwoods", TAPPI, vol. 43, No. 10, pp. 876-880 (1960).
Tappi Standard -T227 (M-58).
Van Deweer, "Unique New Continuous Digesters Improve Operations at Two Mills", Paper Trade Journal, pp. 36-37, 9-5-1960.
Brown, "High Yield Semichemical Pulps From Aspen & Balsam Fir for Printing Paper Production", USDA, Forest Service, Forest Production Laboratories, Project No. 50-7-298 (1958).
"Sophisticated Pilot Pulping Plant Built by CIP in Canada", Pulp & Paper International, pp. 55-56, 5-1971.
Hoglund et al., "Modified Thermomechanical Pulp", Svensk Papperstiding, Nr. 11, 1976, pp. 343-347 & 353.

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