Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1979-07-13
1981-07-14
Smith, William F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 65, 162237, B21C 910
Patent
active
042784964
ABSTRACT:
In a reactor plant for treating finely divided bulk material an acid bulk material or pulp having a solids content of approximately 35-50% is conveyed to a combined high-consistency ozonizer and maturation reactor as a substantially vertical pulp column forming a gas blocking means. In the transition area between the ozonizer and the maturation reactor the finely divided and ozonized pulp which has a very acid pH-value is mixed with chemicals to a pH-value of approximately 8-11 and to a solids content of approximately 15-20%, at which solids content the alkaline pulp in the form of a continuously advancing column is subjected to a maturation process which terminates at a pH-value of the pulp of 6-7.
REFERENCES:
patent: 2916346 (1959-12-01), Jalkanen
patent: 3703435 (1972-11-01), Schleinofer
patent: 3704603 (1972-12-01), Richter
patent: 3964962 (1976-06-01), Carlsmith
patent: 4105494 (1978-08-01), Pettersson
patent: 4123317 (1978-10-01), Fritzvold et al.
Myrens Verksted A/S
Smith William F.
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