Alum (Ferric
Alum / Non Ferric Alum / Powder / Slabs / Lumps)
Alum is the chemical compound used in a lot of
industrial processes due to its beneficial properties like
astringent, antiseptic, antibacterial, deodorant, etc. We are a
established Manufacturer, Exporter and Supplier of qualitative range
of Alum Powder and Crystals, Industrial Alum Powder and Crystals,
Ammonium Alum Powder and Crystals, Chemical Industry Alum Powder and
Crystals, Ferric Ammonium Alum Powder and Crystals, Water Soluble
Alum Powder and Crystals, Laboratory Alum Powder and Crystals, Alum
Crystal, Chemicals Alum Powder and Crystals, ETP Alum Powder and
Crystals, Ferric Alum Powder and Crystals and Non Ferric Alum Powder
and Crystals. Our extensive range of alum is pure, safe and stable
and widely acknowledged for accurate composition, reliability, long
shelf life.
Alums are useful for a range of industrial
processes. They are soluble in water; have an astringent, acid, and
sweetish taste; react acid to litmus; and crystallize in regular
octahydra. When heated they liquefy; and if the heating is
continued, the water of crystallization is driven off, the salt
froths and swells, and at last an amorphous powder remains.
Industrial uses
Potassium alum is the common alum of commerce, although soda
alum, ferric alum, and ammonium alum are manufactured.
Alum has been used at least since Roman times for
purification of drinking water and industrial process water. Between
30 and 40 ppm of alum for household wastewater, often more for
industrial wastewater, is added to the water so that the negatively
charged colloidal particles clump together into "flocs", which then
float to the top of the liquid, settle to the bottom of the liquid,
or can be more easily filtered from the liquid, prior to further
filtration and disinfection of the water.
Flame retardant
Solutions containing alum may be used to treat cloth, wood,
and paper materials to increase their resistance to fire.
Alum is also a component of foamite.
Alum is also used in fire extinguishers to smother chemical
and oil fires.
Chemical flocculant
Alum is used to clarify water by neutralizing the electrical
double layer surrounding very fine suspended particles, allowing
them to flocculate (stick together). After flocculation, the
particles will be large enough to settle and can be removed.
Alum may be used to increase the viscosity of a
ceramic glaze suspension; this makes the glaze more readily adherent
and slows its rate of sedimentation.
Alum is an ingredient in some recipes for homemade modeling
compounds intended for use by children.
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