Production of polysulphide pulping liquor

Details Production of polysulphide pulping liquor Production of polysulphide pulping liquor

D - Textiles, Paper

21

C

23/130, 9/17, 23

D21C 11/00 (2006.01) C01B 17/34 (2006.01) C01D 7/00 (2006.01) D21C 11/12 (2006.01)

Patent

CA 1090532

ABSTRACT OF THE DISCLOSURE Sodium polysulphide is formed by reacting sodium sulphide and sodium sulfur-oxygen salts in the presence of carbon and oxygen. The invention is particularly applicable to reacting recovery furnace smelt from a poly- sulphide 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. - 1 -

302605

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