Ground-breaking innovation for the bleaching of wood pulp

2003 |

The manganese and iron present in wood pulp make it difficult to bleach the pulp using oxygen chemicals. Kemira’s workgroup has developed new, environmentally friendly solutions for the binding of these metal ions. Picture: Juha Rahkonen

The manganese and iron present in wood pulp make it difficult to bleach the pulp using oxygen chemicals. Kemira’s workgroup has successfully developed new, environmentally friendly solutions for the binding of these metal ions. The new binding agents contain less nitrogen than before and are more easily biodegradable than the current chelation agents, resulting in a reduction in nitrogen and waste water emissions and allowing the pulp and paper industry to save production costs.

Affordable, environmentally friendly chelation agents operating in various applications are needed in the pulp and paper industry and, for example, in fertilisers. The project also successfully utilised the extensive cooperation network with universities.