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III. ACTIVATED CARBON
Activated carbon is available in a variety of grades for purification and, particularly, for decoloration applications, as well as for specialized uses.
Darco® KB and KB-B activated carbon
These grades have exceptionally high adsorptive capacities for specific color bodies, making them particularly useful for purifying highly colored liquids. Darco KB-B is processed to achieve an exceptionally low iron content (100 ppm maximum extractable) for very sensitive applications.
| Table 6
- Specifications for Activated Carbon |
| Catalog Number |
16,155-1 |
24,223-3 |
29,259-1 |
24,224-1 |
24,226-8 |
24,227-6 |
26,001-0 |
27,809-2 |
27,810-6 |
| Type |
— |
Darco® |
— |
Darco |
Darco |
Darco
G-60 |
Norit A® |
Darco
KB |
Darco
KB-B |
| Description |
— |
acid-washed lignite carbon, granular |
granular |
acidwashed, granular |
unwashed lignite carbon, granular |
high-purity powder |
powder |
wet powder |
wet powder |
| Particle size (mesh) |
— |
4-12 |
4-14 |
12-20 |
12-40 |
100-325 |
200-325 |
100-325 |
100-325 |
Surface area
(m2/g, approx.) |
— |
— |
— |
600 |
600 |
600 |
750 |
1500 |
1500 |
| Pore volume (ml/g, dry basis) |
— |
0.95 |
— |
0.95 |
0.95 |
0.95 |
— |
2 |
2 |
Moisture
(%, max.) |
— |
— |
— |
— |
— |
12 |
2 |
33 |
33 |
| Iodine number |
— |
— |
— |
— |
— |
— |
800 |
— |
— |
Methylene Blue adsorption
(g/100g, min.) |
— |
— |
— |
— |
— |
15 |
12.5 |
— |
— |
| pH (water extract, approx.) |
— |
— |
— |
— |
— |
6-8 |
9 |
5 |
5 |
| Ash (%) |
— |
— |
— |
— |
— |
3.5 |
6 |
3 |
3 |
| Molasses decolorizing number |
— |
— |
— |
— |
— |
— |
440 |
185 |
185 |
Water solubles
(%, max.) |
— |
— |
— |
— |
— |
0.5 |
— |
1.5 |
1.5 |
Tamped bulk density
(lb/cu ft) |
— |
— |
— |
— |
— |
25 |
a |
28 |
28 |
Fe
(ppm, max.) |
— |
— |
— |
— |
— |
200 |
— |
— |
100 |
| Phosphates (%, extractable) |
— |
— |
— |
— |
— |
— |
— |
0.5 |
0.5 |
| Application |
decolorizing |
general |
— |
general- purpose |
general- purpose |
high-purity use |
decolorizing |
b |
b |
apacked, 0.460g/ml
b described above
®Registered trademarks of American Norit Co., Inc. |
