METHOD AND DEVICE FOR PRODUCING KRAFT CARBON AND KRAFT PULP MATERIALS FROM PULVERIZED CELLULOSIC FIBER MATERIALS

摘要

ACCORDING TO THE PRESENT INVENTION, IT IS POSSIBLE TO PRODUCE BOTH KRAFT PULP AND ALCOHOL FROM HARDWOOD CHIPS OR SIMILAR. THE CHIPS ARE SUBJECT TO MODERATE ACIDIC PRE-HYDROLYSIS FOLLOWED BY MODERATE CAUSTIC PRE-EXTRACTION IN A FIRST CONTAINER 22. HYDROLYSATE REMOVED IN AN INSUFFICIENT AMOUNT OF FURFURAL TO INHIBIT THE GROWTH OF MICROORGANISMS, AND THE SUCH HEXOSE AND PENTOSE IN HYDROLYSATE ARE SUBJECT TO FERMENTATION TO FINALLY PRODUCE ETHANOL, BUTANOL OR THE LIKE. CHIPS (AFTER PRE-EXTRACTION BY A CAUSTIC PRODUCT) ARE SUBJECTED TO SULPHATE BAKING, AND WASHING, AND THE RESULTING PULP IS KRAFT PULP AND EVEN HAS MORE VISCOSITY AND PULLOUT RESISTANCE CHARACTERISTICS DESIRABLE THAN THOSE OF THE CLASSIC KRAFT PULP. THE PULP MAY BE SUBJECT TO OXYGEN DELIGNIFICATION, AND WITH Fewer subsequent bleaching steps, a higher K count can be achieved than the conventional Kraft Pulp.