Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1981-11-17
1984-05-29
Smith, William F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 19, 162 50, 162 56, 162 69, 162233, 162246, 162DIG2, 162 61, 162 62, D21C 110
Patent
active
044513313
ABSTRACT:
A process and apparatus for producing pulp from impregnated cellulose-containing starting materials such as wood, straw, grass, waste materials etc. in a compacting apparatus comprising a shell (1) and two mutually opposite pistons (4, 4') contained in the shell. The material to be compacted is disposed between the pistons and constitutes a resistive electrical load. The pistons are movable relative to each other and the shell is movable relative to the pistons. The impregnated starting materials are digested at a relatively low hydromodulus of 0.5 to 2 with a direct action of heat on the impregnated starting materials in the compacting apparatus at a digesting temperature of 160.degree. to 300.degree. C. The digesting times are short and depend on the digesting temperature.
REFERENCES:
patent: 1991243 (1935-02-01), de la Roza, Sr.
patent: 2072086 (1937-03-01), de la Roza
patent: 2159258 (1939-05-01), de la Roza, Sr.
patent: 2582054 (1952-01-01), Michon
patent: 2771361 (1956-11-01), Birdseye et al.
Kleinert, T. N., Tappl vol. 51, No. 10, 10/68, pp. 467-470, (Kleinert I).
Kleinert, T. N., Pulp Pap.Mag. Can Jul. 1964, T-275-T-283, (Kleinert II).
Article "Neue Technologische Tendenzen fur die Europaische Papierindustrie", in "Das Papier", 1974, No. 10A, pp. V125 to V129, by H. Bouchayer, with an English translation of the relevant part on p. V128, marked with red.
Rabitsch Hermann
Raggam Augustin
Simmering-Graz-Pauker Aktiengesellschaft
Smith William F.
LandOfFree
Process and apparatus for producing pulp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for producing pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for producing pulp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1395988