Carbonaceous material having modified pore structure
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United States of America Patent
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Feb 21, 2012
Grant Date -
May 20, 2010
app pub date -
Nov 20, 2008
filing date -
Nov 20, 2008
priority date (Note) -
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Abstract
The invention provides a method of increasing the mesopore volume of a porous activated carbon, comprising coating a porous activated carbon with a metal oxide or metal oxide precursor to form a treated activated carbon; and calcining the treated activated carbon, in a dry atmosphere, for a time and at a temperature sufficient to increase the mesopore volume of the treated activated carbon. The invention also provides an activated carbon having a total mesopore volume of at least about 0.10 cc/g and less than about 0.25 cc/g, and a percentage of mesopore volume per total pore volume of at least about 15% and less than about 35%. Activated carbon modified according to the invention, cigarette filters incorporating such activated carbon, and smoking articles made with such filters are included in the invention.
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International Classification(s)
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- A24B:MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING ....
- C09C:TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBRO....
- B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
- A24F:SMOKERS' REQUISITES; MATCH BOXES
- A24D:CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPI....
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