Process for producing spherical activated carbon
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United States of America Patent
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Aug 24, 2010
Grant Date -
Mar 31, 2005
app pub date -
Sep 24, 2004
filing date -
Sep 25, 2003
priority date (Note) -
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Abstract
A spherical activated carbon is produced from a starting pitch obtainable from a heavy hydrocarbon oil, such as petroleum tar, coal tar or ethylene, through a moderate process. The starting pitch has a softening point of at least 150° C., a toluene-insoluble content of at least 40% and a property of retaining optical isotropy even after being heated at 430° C. for 1 hour. The starting pitch is converted into a porous spherical pitch, which is then infusibilized, carbonized and activated to provide a spherical activated carbon.
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