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Reagent for pulp bleaching

BleachMag Magnesium Hydroxide Slurry is a high purity, aqueous suspension. It functions as an alkali and cellulose protector in chemical pulp bleaching.

BleachMag contains both hydroxyl ions (OH) and magnesium ions (Mg2+), so it can replace magnesium sulfate (MgSO4) and substitute partially caustic soda (NaOH) in chemical pulp bleaching stages.

BleachMag application. Pulp bleaching

Magnesium hydroxide has a relatively low solubility in water, but under dynamic conditions such as those found in chemical pulp bleaching, magnesium hydroxide is works well. In the presence of hydrogen peroxide, magnesium hydroxide dissociation is facilitated by the activation of peroxide. The reaction for peroxide activation consumes hydroxyl ions, and the dissociation of magnesium hydroxide shifts continuously to the right. It makes both magnesium ions and hydroxyl ions available for cellulose protection and alkalinity requirements.

  • Mg(OH)2 ↔ Mg+2+2OH — Magnesium Hydroxide Dissociation

The above reaction shifts to the right due to peroxide activation.

  • 2OH + 2HOOH — 2H2O + 2OOH — Peroxide Activation

It has been proved in laboratory studies and industrial tests that BleachMag Magnesium Hydroxide Slurry is cost effective in replacing magnesium sulfate and in reducing caustic soda in chemical pulp bleaching.

Our company can supply you a suspension BleachMag, or dry powder of magnesium hydroxide, which you can slurry by yourself and use in the process of bleaching pulp.

Since each production its own demands to the conditions and quality of bleaching, Europiren can provide the necessary number of samples and to accommodate the technical support for all the tests.

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