Paper Recycling

In paper recycling the removal of printing ink is the most important objective in case the fibers should be reused in the manufacture of printing papers or tissue grades. Brightening and color removal are secondary targets. Fiber brightening is achieved mainly with H₂O₂.

The alkaline conditions of repulping of wastepaper are ideally suited for a simultaneous application of hydrogen peroxide. Small amounts of hydrogen peroxide are sufficient to

• improve brightness and
• prevent alkaline yellowing

In post bleaching steps, e. g. in a disperser, the brightness is further improved.

Evonik's Applied Technology Center offers technical assistance to customers for the analysis and the optimization of existing processes. Information and assistance in setting up storage tanks and dosing units is available from our Engineering Services. Internationally presented papers on wastepaper recycling (deinking) are available as additional information source on a number of technically important topics.