Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Defibration by projection or explosion
Patent
1975-09-23
1976-12-28
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Defibration by projection or explosion
162 22, 162 50, 204158R, 219 1055M, 241 1, D21B 130, D21C 500
Patent
active
040000320
ABSTRACT:
A process is provided for freeing cellulose fibers from lignocellulosic material, which comprises subjecting particulate lignocellulosic material to irradiation at a frequency within the range from about 10 to about 300,000 MHz (megahertz), at an intensity of at least 0.5 megajoule per kg. of material, applied in a short pulse having a duration of at most 0.1 second, at such an intensity the water present in the lignocellulosic material is rapidly and even explosively vaporized, and disrupts or destroys the natural structure of the lignocellulosic material, thereby freeing the fibers substantially without deleterious effect upon the length or strength of the fibers.
REFERENCES:
patent: 3092536 (1963-06-01), Russell
patent: 3535795 (1970-10-01), Olsen
patent: 3678594 (1972-07-01), Goerz et al.
patent: 3682643 (1972-08-01), Foster
patent: 3759783 (1973-09-01), Samuelson et al.
patent: 3801432 (1974-04-01), Free
Physical Chemistry, Third Edition, Daniels et al., Wiley & Sons Inc., New York, 1967, p. 422.
Bergstrom John Rickard
Tiberg Ernst Birger
Alvo Steve
Bashore S. Leon
Mo och Domsjo
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