|
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 |
|
|