This form of activated carbons are manufactured from wood saw dust. The porous structure of chemically activated carbons have high developed macroporosity (large size pores) and to a much smaller extent mesoporosity. The chemically activated carbon made from saw dust produces activated carbon with an acidic pH.

Manufacturing process: The finely pulverized saw dust is saturated with concentrated phosphoric acid. It is than taken out dried and heated to 600�C in a rotary kiln. The activation takes place as the phosphoric acid evaporates from the saw dust. These leads to the opening of the pores which increases the surface area of the carbon. Products obtained by fermentation processes can be purified using chemically activated carbons. It is specifically used in the purification of starch, glucose and sugar Our standard specification of chemically activated carbons are as under.

Grades	ZELOX ZCP-15	ZELOX ZCP-20	ZELOX ZCP-25	ZELOX ZCP-40
Appearance	Fine Black Powder	Fine Black Powder	Fine Black Powder	Fine Black Powder
Methylene Blue Value (mg / g)	150 mg / gm.	200 mg / gm.	250 mg / gm.	300 mg / gm.
pH	5 � 6.5	5 � 6.5	5 � 6.5	5 � 6.5
L.O.D	10.00%	10.00%	5.00%	5.00%
Ash Contents	10.00%	8.00%	5.00%	5.00%
Bulk Density	260 g / 1	250 g / 1	230 g / 1	200 g / 1
Ash Contents	10.00%	8.00%	5.00%	5.00%
Acid Soluble Matter	8.0% w / w	5% w / w	5% w / w	4% w / w
Kmno4 Adsorption	60	90	90	110

Applications of Chemically Activated Carbon Powder:

• It is used in decolorisation of liquids having impurities with larger pore size i.e. Sugar Solutions, Glucose, Dextrose, Lactose & other starch sugar solution.

• Used in decolorisation of vegetable oils and fats and herbal products