The effect of transition metal ions on the kraft pulping process

@inproceedings{Kangas2002TheEO,
  title={The effect of transition metal ions on the kraft pulping process},
  author={Heli Kangas and Leif Roberts{\'e}n and Tapani Vuorinen},
  year={2002}
}
In this work the effects of transition metals (Co, Cu, Fe, Mn, Ni) in a conventional batch kraft cook were investigated. The influence of each transition metal on delignification and pulp properties was studied separately. Pulps were also cooked from chips pre-treated with acid or chelating agent. Pre-treatment of chips by acid washing or chelation lowered the metal content of the pulp considerably. Removal of the acid-soluble metals before cooking lowered the cooking kappa by about 10… CONTINUE READING