is reduced to 9,10-dihydroxyanthracene which then can react with lignin. The lignin is degraded and becomes more watersoluble and thereby more easy to wash away from the pulp, while the anthraquinone is regenerated. This process gives an increase in yield of pulp, typically 1-3% and a reduction in kappa number.

Hydrogen peroxide production

In the production of hydrogen peroxide

A large industrial

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