Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1978-05-01
1979-05-08
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 19, 162 30R, 162 30K, 162 33, 162 34, 162 35, 162 82, 162 86, 423DIG3, D21C 100, D21C 302, D21C 324, D21C 1104
Patent
active
041535022
ABSTRACT:
Sodium polysulphide is formed by reacting sodium sulphide and sodium sulphur-oxygen salts in the presence of carbon and oxygen. The invention is particularly applicable to reacting recovery furnace smelt from a polysulphide pulping process to form a mixture of sodium polysulphide and sodium carbonate which is substantially free from sodium sulphur-oxygen salts, so that dead-load sulphidity is substantially eliminated from the pulping liquor.
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Bashore S. Leon
Corrosion Service Company Limited
Kratz Peter F.
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