Preparation of liquor for delignification or alkali treatment by

Details Preparation of liquor for delignification or alkali treatment by Preparation of liquor for delignification or alkali treatment by

1976-08-31

1978-09-26

Fisher, Richard V.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 65, 162 80, D21C 1112

Patent

active

041167597

ABSTRACT:
A method for the regeneration of pulping or bleaching chemicals from spent liquor containing salts of polybasic organic acids. The liquor is evaporated and then burned so that organic matter will be discharged as carbon dioxide and water, and a carbonate residue is formed. Carbon dioxide is expelled from the carbonate with an acid by autocaustization to regenerate the cooking chemicals.

REFERENCES:
patent: 1643826 (1927-09-01), Summers
patent: 1730383 (1929-10-01), Richter
patent: 1868569 (1932-07-01), Dils
patent: 1935580 (1933-11-01), Richter
patent: 2601110 (1952-06-01), Fisher et al.
patent: 2673148 (1954-03-01), Harris
patent: 3024158 (1962-03-01), Grangaard et al.
patent: 3594270 (1971-07-01), Schattner et al.
patent: 3661699 (1972-05-01), Farley

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