Pyrolysis of black liquor at high temperatures using radiant ene

Details Pyrolysis of black liquor at high temperatures using radiant ene Pyrolysis of black liquor at high temperatures using radiant ene

1985-02-25

1987-01-20

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 3011, 423DIG3, 423207, D21C 1112, D21C 1100

Patent

active

046378588

ABSTRACT:
This invention is a process for recovering sodium hydroxide directly from black liquor. The process involves pyrolyzing the black liquor in the absence of oxygen to produce a product containing sodium carbide, and hydrolyzing the sodium carbide to form sodium hydroxide. The pyrolysis is carried out at about 4000.degree. F. using radiant energy.

REFERENCES:
patent: 3607619 (1971-09-01), Hess et al.
patent: 3762989 (1973-10-01), Timpe
patent: 3862909 (1975-01-01), Copeland
patent: 4095974 (1978-06-01), Matovich
patent: 4208245 (1980-06-01), Watkins et al.

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