Flame retardants for polymers
Ecopiren in TPO roofing membranes Ecopiren in PVC wire and cable formulations Ecopiren in halogen-free wire and cable formulations Ecopiren in polyamide compounds Ecopiren as ATH replacement Ecopiren in ACP
- Metallurgical fluxFlux for steelmaking in converter Flux for steelmaking in Electric arc furnace
- EcologyWastewater treatment Flue gas desulfurization
- Technical rubber products
- Exhaust gas cleaning on ships
- Magnesium hydroxide in the pulp and paper industryChemical pulping Reagent for pulp bleaching Mechanical pulp bleaching
- Anti-caking agent for mineral fertilizersAnti-caking agent for ammonium nitrate Anti-caking agent for complex fertilizers
- FertilizersAgroMag® Granular AgroMag® Aktimax
- Animal FeedMagnesium additive in feed for cattle Magnesium additive in feed for pigs
- Component for the production of magnesium productsMain page /Ranges of application / Magnesium hydroxide in the pulp and paper industry / Chemical pulp bleaching
Chemical pulp bleaching
BleachMag® reacts as an alkali source and cellulose protector in chemical pulp bleaching. BleachMag® slurry 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. It has been proved in laboratory and mill that BleachMag® slurry is a cost effective option.
Dual action in chemical pulp bleaching
Magnesium hydroxide in general has a low solubility in water. However, in chemical pulp bleaching, the dissolution of BleachMag® is unproblematic, because the activation of hydrogen peroxide facilitates the dissolution. The peroxide activation to the right (1) consumes hydroxyl ions, which shifts the balance of magnesium hydroxide dissociation (2) also to the right. This results in both magnesium ions and hydroxyl ions available for cellulose protection and alkalinity requirements.
H2O2 + OH- ↔ HOO- + H2O — Peroxide Activation (1)
- Mg(OH)2 ↔ Mg+2 + 2OH- —Magnesium Hydroxide Dissociation (2)
The optimization of BleachMag® dosage in chemical pulp bleaching depends on the special targets at the pulp mill. Therefore, LLC «Russian Mining Chemical Company» provides samples and technical support for your tests. 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.
Solutions for this field
The most demanded products of RMCC in this field are:
Contact us, our experts will provide you with advice on the use of the productBleachMag®
+7 495 789 65 30 firstname.lastname@example.org
Ecopiren — effective mineral flame retardant and smoke absorber for polymer composites based on magnesium hydroxide crushed
AktiMax — new environmentally friendly magnesium fertilizer for all crops as basic fertilizer and meliorant
AgroMag — conditioning additive (anti-caking agent) for use in the manufacture of ammonium nitrate and NPK
MagTreat — solution for water treatment and flue gas desulphurization
FluMag — highly efficient metallurgical magnesia based flux brucite Kuldur deposit
MagPro — used as a reagent for the vulcanization of rubber in the manufacture of rubber products
BleachMag — highly efficient new generation product for the production of cellulose and semi-high output
MagAdd — ideal raw material for the production of a wide range of magnesium compounds and products based on the best varieties of brucite
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- Metallurgical flux