Process of making cellulose pulp with a sulphite cooking liquor

Details Process of making cellulose pulp with a sulphite cooking liquor Process of making cellulose pulp with a sulphite cooking liquor

1988-02-16

1988-11-22

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 72, 162 83, 162 84, D21C 306, D21C 320, D21C 326

Patent

active

047863650

ABSTRACT:
A process of manufacturing cellulose pulp from wood by digesting the wood with sulphite cooking liquor containing additions of sulphide and in the presence of a quinone or hydroquinone compound. According to the invention, the mole ratio between sulphide and sulphite shall amount to 0.01-0.2, preferably 0.05.0.15, suitably 0.08-0.12.

REFERENCES:
patent: 1387441 (1921-08-01), Braun
patent: 3262839 (1966-07-01), Luthgens
patent: 4012280 (1977-03-01), Hulton
patent: 4213821 (1980-07-01), Vanderhock et al.
patent: 4363700 (1982-12-01), Wada et al.

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