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  Uses Of Alum
 

Alum has been part of our lives ever since the time of early Egyptians, who used it in dyeing and purification. Today, it is one of the most widely used and versatile industrial chemicals.
 
Most of the alum produced today is used in the pulp & paper industry as well as water and wastewater treatment. It is inexpensive and effective for a broad range of treatment problems because it can function as a coagulant, flocculants, precipitant and emulsion breaker. As a coagulant and flocculants, alum removes turbidity, suspended solids and colloidal color, reduces biochemical oxygen demand (BOD) and clarifies potable, process and wastewater.
The main uses of alum are:
·         Water treatment: used as a coagulant to remove suspended solids and or some metals (e.g. Cr, Ba, Cu) from water (either drinking water or in waste treatment facilities)
·         Paper sizing: used as a rosin sizing control in paper production, affects the drainage of liquor from the paper

 

In addition to the primary uses in the pulp & papermaking industry and for water and wastewater treatment, alum is also used in:

 

Cellulosic insulation

Additive to Cellulosic insulation

Clay manufacturers

China clay beneficiation

Dyes

Mordant for dyes

Grease manufacturers

Manufacture of aluminum soaps and greases

Industrial wastewater treatment

Sewage and industrial wastewater treatment, emulsion breaking

Manufacture of alumina trihydrate and printing inks

Manufacture of alumina trihydrate for lakes and color extenders

Municipal wastewater treatment

Clarification and phosphorus removal

Potable and process water treatment

Color and turbidity removal

Pulp and paper mills

Process water and mill effluent treatment. Paper sizing

Soap manufacturers

Manufacture of glycerin from soap lyes

Swimming pools, oil well operators, manufacturers

Water treatment

Tanneries

Tanning furs and white leathers

Zeolite and catalyst manufacturers

Manufacture of Zeolite and aluminosilicate catalysts and carriers

 

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