Oxygen/sodium carbonate bleaching of kraft pulp pretreated with nitrogen dioxide and oxygen

alkali metals carbonate carbonates carbonatos chemical pulp elements fibras fibras vegetales fibre fibre vegetale fibres gases gaz growing media inorganic compounds medio de cultivo medios de enraizamiento metal metales metales alcalinos metals milieu d'enracinement no metales nonmetals oxides oxyde oxygen physical states plant fibres procesamiento processing productos productos de origen vegetal products produit pulp pulpa rooting media sales salts sel sodio sodium substrat de culture traitement vegetable products