Carbonaceous material having modified pore structure
US8119555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2008 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Nov 11, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/163
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.