Patent classifications
D
TEXTILES; PAPER
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D21
PAPER-MAKING; PRODUCTION OF CELLULOSE
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D21C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
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11/00
Regeneration of pulp liquors; or effluent waste waters
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D21C11/0085
Introduction of auxiliary substances into the regenerating system in order to improve the performance of certain steps of the latter, the presence of these substances being confined to the regeneration cycle
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D21C11/0092
Substances modifying the evaporation, combustion, or thermal decomposition processes of black liquor
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