C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
252/26
C01B 31/08 (2006.01) B01J 21/18 (2006.01) C01B 31/10 (2006.01) C01B 31/14 (2006.01)
Patent
CA 1117513
A SPHERICAL ACTIVATED CARBON HAVING LOW DUSTING PROPERTY AND HIGH PHYSICAL STRENGTH AND PROCESS FOR PRODUCING THE SAME ABSTRACT The specification discloses a process for producing spherical activated carbon particles having high strength and low susceptibility to dusting. The particles are produced by heating a mixture of pitch (having a softening point of 50-350°C, a carbon content of 80-97%, a hydrogen/carbon atomic ratio of 0.3-2.0, and a nitrobenzene-insoluble matter content of below 60%), at least one aromatic compound as a solvent miscible with the pitch, and 0.1-10 wt. % (based on the amount of the pitch) of at least one polymer of chain hydrocarbon or a copolymer having the chain hydrocarbon moiety as a major component thereof. The resulting liquified mixture is then dispersed in an aqueous medium containing a suspending agent, thereby producing microspheres of the mixture dispersed in the solution. The microspheres are then treated to the removal of solvent, infusibilization, carbonization and activation. The resulting carbon is particularly useful in those cases where the formation of dust is harmful or dangerous.
320938
Hino Kuniaki
Nishimura Yasushi
Okada Yoshio
Uehara Yasuo
Watanabe Kazuhiro
Kirby Eades Gale Baker
Kureha Kagaku Kogyo Kabushiki Kaisha
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