Spherical Active Carbon And Process For Producing The Same
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United States of America Patent
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Issued Date -
Mar 13, 2008
app pub date -
May 16, 2005
filing date -
May 20, 2004
priority date (Note) -
Abandoned
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Abstract
An active carbon produced from an infusible carbonaceous material as a raw material, which active carbon when used for prevention of automobile fuel evaporation, etc., would not cause any trouble attributed to dust generation, exhibiting reduced pressure loss; and a process for producing the same. There is provided a spherical active carbon produced from an infusible solid carbon material as a raw material, wherein providing that x represents an average particle diameter (mm) and y an MS hardness (%), when x is in the range of 0.5 to 20, y is .gtoreq.100.times.(1-0.8.times.1.45.sup.(0.3-x)). This spherical active carbon can be produced by a process comprising mixing a carbon material with a carbonizable binder; extruding the mixture into a strand form; carrying out rolling granulation so as to obtain a spherical form; rendering the same infusible under appropriate conditions corresponding to the particle size; and performing carbonization and thereafter activation under conditions appropriately restricting the contact with activation gas.
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