Production of pith free paper pulp from bagasse

Claim 1

THE PROCESS OF CONVERTING BAGASSE OR THE LIKE TO PITHFREE UNIFORM HIGH GRADE BRIGHT COLORED PAPER PULP COMPRISING THE STEPS OF: TREATING THE BAGASSE IN AN AQUEOUS SOLUTION OF ENZYMES SELECTED FROM THE GROUP CONSISTING OF CARBOHYDRATE-ACTIVE ENZYMES AND PROTEIN-ACTIVE ENZYMES TO LOOSEN THE PITH CELLS FROM THE FIBER BUNDLES, AGITATING THE BAGASSE VIOLENTLY IN AN AQUEOUS SLURRY TO DETACH THE PITCH CELLS FROM THE FIBER BUNDLES, DIGESTING THE FIBER BUNDLES FIRST IN A KRAFT-TYPE SOLUTION CONTAINING BY WEIGHT ABOUT 3% NAOH AND 1.5% NA2S AND COMPRISING ADDITIONALLY BY WEIGHT ABOUT 2-5% SODIUM PEROXIDE WITH A STABILIZER THEREFOR AND ABOUT 0.2-1.0% AMMONIUM NITRATE, UNDER A SATURATED STREAM PRESSURE OF ABOUT 150 P. S. I. G., THEN DRAINING OFF SOLUTION UNADSORBED BY THE FIBERS AND ADDING AN AQUEOUS SOLUTION COMPRISING BY WEIGHT ABOUT 1.0%-2.5% SODIUM PYROPHOSPHATE PEROXIDE, CONTAINUING THE DIGESTION UNDER A SATURATED STREAM PRESSURE OF ABOUT 175 P. S. I. G., AND TERMINATING THE SECOND DIGESTION BY SUDDENLY RELEASING THE PRESSURE TO CAUSE AN EXPLOSIVE EXPANSION OF THE FIBER BUNDLES TO PULP.