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D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C1/00—Pretreatment of the finely-divided materials before digesting
D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
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Chemical And Physical Treatments For Wood And The Like
(AREA)
GB191118191D1911-08-11Process for the Manufacture of Wood Pulp and Half-stuff from Resinous kinds of Wood.
ExpiredGB191118191A
(en)