Pulp bleaching

Pulp bleaching

image

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.

BleachMag
advantages

The most cost effective alkali
in comparison with others
on the market
Non-toxic, non-corrosive, safe for
the environment and handling
Reduces caustic soda (NaOH) consumption by up to 50% and bleaching chemicals like silicates, chelates
Replaces magnesium sulfate (MgSO4), performing all its functions
Keeps a high whiteness
of the cellulose
Reduces COD and wastewater treatment costs

Comparison with competitive products

Parameter

Safe reagent

Reduces bleaching costs

Reduces COD

Reduces amount of bleaching chemicals (silicates, chelates)

Acts like as a protector of cellulose fibers

Increases pulp yield

Price/performance ratio

BleachMag

++

++

++

++

++

+

++

Caustic soda solution NaOH

xx
x
xx
xx
xx
x
xx

Synthetic magnesium hydroxide suspension Mg(OH)2

++
+
++
++
++
+
+

++ — excellent property

+ — good property

x — poor property

xx — ineffective property

Documentation

Recommendations for use
pdf, 1.52 Mb
Safety Data Sheet
pdf, 1.53 Mb
01
  • BleachMag P
    pdf, 171.02 Kb
  • BleachMag S
    pdf, 171.79 Kb
02
  • Report. PFI. Pulp Bleaching with BleachMag
    pdf, 576.34 Kb
  • Article. IMPC. BleachMag – mill operation experiences
    pdf, 190.42 Kb

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