Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1978-08-09
1980-12-30
Kratz, Peter F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 31, 162 42, 162 44, 162 51, 210758, 210765, D21C 302, D21C 1104, D21C 1108
Patent
active
042421772
ABSTRACT:
A method for oxidizing and removing remaining sodium sulfide as well as generated sulfur compounds by introducing oxygen into cooking liquor at high temperature and high pressure in the end stage of kraft cooking.
REFERENCES:
patent: 3216887 (1965-11-01), Landmark
patent: 3362868 (1968-01-01), Backlund
patent: 3963561 (1976-06-01), Richter
In Digestor Black Liquor Oxidation for Odor Control in Kraft Pulping, McKean et al., EPA, Jan. 1974.
Fukuzawa Akira
Hara Shin-ichi
Ishizuka Fumihiko
Onuma Nobuo
Osawa Akira
Kratz Peter F.
Mitsubishi Heavy Industries Ltd.
Mitsubishi Paper Mills Ltd.
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