Activated Carbon

	AL-143 Mineral Adsorbents, Filter Agents and Drying Agents

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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

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