BleachMag®
Magnesium hydroxide based suspension
for pulp bleaching.
The main applications of BleachMag® are in the pulping process and pulp bleaching.
BleachMag® acts as an alkali, a stabilizer of hydrogen peroxide and a protector of cellulose in chlorine-free bleaching of cellulose fiber.
Also, it completely replaces magnesium sulfate in oxygen delignification of cellulose.
BleachMag® acts as a cooking base in the sulphite and bisulphite pulping process. Due to its lower molecular weight compared with alkalis on the market, BleachMag® reduces the alkali consumption per ton of pulp produced.
BleachMag® is produced in the form of a suspension and as a powder. The powders and suspension have a median (D50) particle size 5,5 µm. BleachMag® is produced from the highest quality brucite ore with a low iron content.
Product shape
liquid aqueous suspension, powder
We offer different packaging options based on product form
BleachMag advantages
01 The most cost-effective alkali in comparison with others on the market
02 Suspension with the highest percentage of solids on the market – 65%
03Non-corrosive, non-toxic
04Safe for the environment and handling
Natural magnesium hydroxide alkali for pulp and paper
Pulp bleaching
BleachMag® magnesium hydroxide is is an alkaline additive made of milled brucite mineral; it is used for bleaching of pulp.
BleachMag® functions as an alkali, a stabilizer of hydrogen peroxide and a protector of cellulose in chlorine-free bleaching of pulp. It can be used for bleaching mechanical, thermomechanical, chemical-thermomechanical, chemical pulp, and waste paper (DIP). It replaces more expensive alkalis at the hydrogen peroxide bleaching stage, delignification and extraction with oxygen and alkali (stages Eop, P, Ep, E). It allows 100% replacement of magnesium sulfate (MgSO4) at oxygen delignification of cellulose.
Customers can prepare a diluted suspension of BleachMag® from the powder and water.
Specifications
BleachMag S
PDF 47KB
BleachMag P
PDF 50KB
Advantages
01 The most cost effective alkali in comparison with others on the market
02 Non-toxic, non-corrosive, safe for the environment and handling
03 Reduces caustic soda (NaOH) consumption by up to 50% and bleaching chemicals like silicates, chelates
04Replaces magnesium sulfate (MgSO4), performing all its functions
05Keeps a high whiteness of the cellulose
06Reduces COD and wastewater treatment costs
FAQ: BleachMag® Magnesium Hydroxide for Pulp Bleaching
Learn how BleachMag® is used in pulping, chlorine-free bleaching, peroxide bleaching and oxygen delignification, and review its product forms, benefits and available specifications.
BleachMag® is mainly used in bleaching and pulping. It can also serve as a base component of cooking liquor in sulfite and bisulfite pulping.
In various chlorine-free bleaching processes, BleachMag® can be used as an alkaline reagent, a hydrogen peroxide stabilizer and a cellulose-protecting agent.
BleachMag® can be used for bleaching mechanical pulp, thermomechanical pulp, chemithermomechanical pulp and deinked recycled pulp (DIP).
BleachMag® can replace more expensive alkalis during peroxide bleaching and in delignification and alkaline extraction stages such as Eop, P, Ep and E. The page also states that NaOH consumption can be reduced by up to 50%.
Yes. The page states that BleachMag® can replace magnesium sulfate (MgSO4) by 100% during oxygen delignification of cellulose while performing the same function.
BleachMag® is made from brucite ore with a low level of iron impurities and is supplied as a concentrated suspension or powder. The stated D50 for both powder and suspension is about 5.5 µm, and the suspension can contain up to 65% solids.
The page lists strong price/performance, non-corrosive and non-toxic properties, lower consumption of caustic soda and bleaching chemicals such as silicates and chelating agents, maintenance of high pulp brightness, and lower COD and wastewater treatment costs.
The page provides technical PDF documents for two specifications, BleachMag®-P and BleachMag®-S, together with quotation, TDS download and contact options.
Use the page contact form to request technical information or a quotation for BleachMag®-P or BleachMag®-S.
Comparison with competitive products
Parameter |
BleachMag |
Caustic soda solution NaOH |
Synthetic magnesium hydroxide suspension Mg(OH)2 |
|---|---|---|---|
| Safe reagent | ++ | xx | ++ |
|
Reduces bleaching costs |
++ | x | + |
| Reduces COD | ++ | xx | ++ |
| Reduces amount of bleaching chemicals (silicates, chelates) | ++ | xx | ++ |
| Acts like as a protector of cellulose fibers | ++ | xx | ++ |
| Increases pulp yield | + | x | + |
| Price/performance ratio | ++ | xx | + |
++excellent property
+ good property
x poor property
xx ineffective property
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