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Rapid kraft pulping process for bagasse and other fibrous, non-woody lignocellulosic plant materials

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1. THE PROCESS OF PULPING FIBROUS, NON-WOODY, LIGNOCELLULOSIC PLANT MATERIALS WHICH COMPRISES FORMING A MIXTURE COMPRISING THE PLANT MATERIAL AND AN AQUEOUS DIGESTING LIQUOR CONTAINING AS ACTIVE PULPING AGENTS NAOH AND NA2S, THE MIXTURE BEING CHARACTERIZED BY A RATIO OF THE LIQUOR TO OVEN DRY PLANT MATERIAL OF FROM 2:1 TO 15:1 AND A SULFIDITY OF 15-35%, THE COMBINED AMOUNT OF NAOH AND NA2S BEING FROM 6 TO 20% BASED ON THE WEIGHT OF OVEN DRY PLANT MATERIAL, HEATING THE MIXTURE UNDER PRESSURE TO A TEMPERATURE OF FROM 140 210*C. OVER A TIME PERIOD OF UP TO 15 MINUTES, AND MAINTAINING THE MIXTURE UNDER PRESSURE AT 140-210*C. FOR A TIME PERIOD OF FROM 30 SECONDS TO 5 MINUTES.
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