abstract |
DIGESTING WOOD IN A PULPING LIQUOR FOLLOWED BY WASHING, BLEACHING, AND EXTRACTING OF THE PULP, AND CONCENTRATING AND SUBJECTING THE LIQUOR TO REDUCING CONDITIONS TO RECOVER CHEMICALS, WHEREIN AT LEAST PART OF THE WASH WATER OBTAINED FROM WASHING BLEACHED CELLULOSIC PULP OR FROM WASHING BLEACHED AND EXTRACTED CELLULOSIC PULP IN EMPLOYED TO WASH UNBLEACHED CELLULOSIC PULP THEREBY PROVIDING COUNTERCURRENT FLOW OF WASH WATER. |