Chemical pulping and bleaching in an enclosed reaction zone,by reduction of chlorate
Abstract
Abstract A PROCESS FOR THE TREATMENT OF CELLULOSIC MATERIAL IN SUBDIVIDED FORM INCLUDING THE STEPS OF FIRSTLY PROVIDING AN ENCLOSED REACTION ZONE FOR THE TREATMENT OF THE CELLULOSIC MATERIALS; SECONDLY PROVIDING A REACTANT LIQUOR PHASE IN THE REACTION ZONE; THIRDLY PROVIDING A SUPERPOSED GAS PHASE OVER THE REACTANT LIQUOR IN THE REACTION ZONE; AND FOURTHLY AGITATING THE CELLULOSIC MATERIAL IN THE ENCLOSED REACTION ZONE. THE IMPROVEMENT INVOLVES USING AS THE REACTANT LIQUOR PHASE, AN AQUEOUS LIQUOR COMPRISING A LIQUOR SOLUBLE CHLORATE AND A REDUCING AGENT FOR THE CHLORATE, THE REDUCING AGENT BEING PRESENT IN 0.1 TO 2.0 MOLAR EXCESS BASED UPON THE AMOUNT OF CHLORATE USED. BECAUSE OF THE SERIES OF STEPS CARRIED OUT AND THE PARTICULAR COMPOSITION OF THE REACTANT PHASE, THE GAS PHASE SUPERPOSED OVER THE REACTANT LIQUOR IN THE ENCLOSED REACTION ZONE CONTAINS EVOLVED CHLORINE DIOXIDE AND/OR CHLORINE THUS PREVENTING ANY ENCRUSTATION WHICH MAY FORM ON THE OUTER WALLS OR SURFACES OF THE CELLULOSIC MATERIALS.
Inventors
- 👤 Gothe Oscar Westerlund
- 👤 Kin Seto
Bibliographic Details
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