Surface hydrophobic active carbon and method for production ther

Details Surface hydrophobic active carbon and method for production ther Surface hydrophobic active carbon and method for production ther

1996-09-13

1998-11-17

Langel, Wayne

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Free carbon containing

423445, 4234471, 4234472, 423460, 502180, B01J 2002

Patent

active

058376445

ABSTRACT:
A surface hydrophobic active carbon is disclosed which has undergone a treatment with trimethyl chlorosilane and exhibits a silicon concentration on the surface thereof, Si.sub.2p /C.sub.1s, in the range of 0.005-0.03 as determined by X-ray photoelectron spectroscopy and a humidity for starting adsorption of water in the range of 45-60% as determined from the equilibrium adsorbed water content curve, and a method for the production of a surface hydrophobic active carbon is disclosed which comprises exposing active carbon to trimethyl chlorosilane, allowing the exposure to continue for a prescribed length of time, evacuating the ambience, thereby removing excess amount of trimethyl chlorosilane, and subsequently heating the active carbon under a vacuum.

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