POLUTION FREE PULPING PROCESS USING RECYCLED WASH EFFLUENT FROM MULTIPLE BLEACH STAGES TO REMOVE BLACK LIQUOR AND RECOVERING SODIUM HYDROXIDE FROM THE BLACK LIQUOR

摘要

ABSTRACT OF THE DISCLOSUREThere is disclosed a pollution free pulpingprocess wherein a lignocellulosic material is subjectedto various pulping and bleaching steps without theuse of sulphur and chlorine. The system is a closedone thus minimizing energy and chemical requirementswhile permitting one to obtain a product having excellentphysical properties.