Activated Carbons

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POWDERED ACTIVATED CARBON

Powdered varieties of Activated Carbon are used in liquid phase application primarily for removal of undesired colour, smell and other impurities in many types of industries including basic drugs, fine chemicals, glucose, sugar, electroplating plasticizers and so on. Quite often, powdered carbon is washed with acid and then, repeatedly with water & dried to minimize impurities like soluble ash-iron, heavy metals etc. Activated Carbon is invariably used in a batch process at the penultimate stage of manufacture of a product. A pre-determined quantity of activated carbon is added to a solution and after stirring for a certain contact time mostly at elevated temperature carbon is filtered out or settled to get a sparkling colour free solutions from which product is recovered.
It is pertinent to mention that use of powdered activated carbon apart from decolourising imparts several other benefits like longer shelf life, truer, and bolder crystals, closer melting and boiling points etc.

Properties Unit Unwashed Grades Washed Grades
K-5 K-4 K-4 super
K-3
K-2 K-1 K-1 super
Moisture Content
%
10
6
MBValue
mg/g.
230
270
310
210
240
280
310
Ash Content
%
10
5
4
3
3
Water Solubles
%
3.5
1.0
Acid Solubles
%
6.0
2.0
2.0
1.5
1.0
Iron
ppm
1000
300
200
150
100
300 Mesh
%
70
pH Value  
ADJUSTABLE AT DESIRED LEVEL

GRANULAR ACTIVATED CARBON

Granular activated carbons are mostly made from Coconut Shells on petroleum coke, bituminous coal or lignite. Granular activated carbon is used in continuous process in areas like water treatment (drinking & effluent water), removal of mercury from effluents or alkali cells, solvent recovery, gold recovery, removal of odour, gas masks, as catalyst carrier, for decholorination of water, purification & separation of gases, kitchen hoods, dry cleaning etc.

Properties Unit Grades of granular activated carbon
KGr-4 KGr-3 KGr-2 KGr-1 KGr-1 Super
Iodine Value
mg/g.
350
550
600
950
1100
Apparent Density
kg/m3
620
580
550
510
480
CTC Adsorption
%
15
25
35
45
60
Hardness
%
95
95
90
90
85
Ash Content
%
5
5
4
4
4
pH Value  
8-10
Sieve Size  
Any Desired Size

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