Porous carbon materials and smoking articles and smoke filters therefor incorporating such materials
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A24B-015/28
A24D-003/16
B01J-020/20
B01J-020/28
C04B-038/00
C04B-038/06
C01B-032/30
출원번호
US-0887301
(2006-03-27)
등록번호
US-9907336
(2018-03-06)
우선권정보
GB-0506278.1 (2005-03-29)
국제출원번호
PCT/GB2006/001102
(2006-03-27)
§371/§102 date
20071107
(20071107)
국제공개번호
WO2006/103404
(2006-10-05)
발명자
/ 주소
Cashmore, Maria
White, Peter Rex
Kozynchenko, Oleksandr
Blackburn, Andrew
Tennison, Stephen Robert
출원인 / 주소
BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
40
초록▼
A porous carbon material suitable for incorporation in smoke filters for cigarettes has a BET surface area of at least 800 m2/g and a pore structure that includes mesopores and micropores. The pore volume (as measured by nitrogen adsorption) is at least 0.9 cm3/g and from 15 to 65% of the pore volum
A porous carbon material suitable for incorporation in smoke filters for cigarettes has a BET surface area of at least 800 m2/g and a pore structure that includes mesopores and micropores. The pore volume (as measured by nitrogen adsorption) is at least 0.9 cm3/g and from 15 to 65% of the pore volume is in mesopores. The pore structure of the material provides a bulk density generally less than 0.5 g/cc. The material may be produced by carbonizing and activating organic resins and may be in the form of beads for ease of handling.
대표청구항▼
1. A smoking article comprising smoking material and a porous carbon material, wherein the porous carbon material has: a BET surface area of about 900 to about 1638 m2/g,a pore structure that includes mesopores and micropores,a pore volume (as measured by nitrogen adsorption) of at least 0.9 cm3/g,a
1. A smoking article comprising smoking material and a porous carbon material, wherein the porous carbon material has: a BET surface area of about 900 to about 1638 m2/g,a pore structure that includes mesopores and micropores,a pore volume (as measured by nitrogen adsorption) of at least 0.9 cm3/g,a bulk density of not more than 0.5 g/cc,15 to 65% of the pore volume of the porous carbon material (as measured by nitrogen adsorption) is in mesopores, andthe porous carbon material is in particulate form having a mean particle size of 50 to 1000 micron. 2. A smoking article according to claim 1 comprising a rod of smoking material and a filter, and the porous carbon material is incorporated in the filter. 3. A smoking article according to claim 1, wherein the pore volume (as measured by nitrogen adsorption) of the porous carbon material is at least 1.0 cm3/g and from 30 to 65% of the pore volume is in mesopores. 4. A smoking article according to claim 1, wherein less than 20% of the pore volume of the porous carbon material is in pores having diameters in the range 2-10 nm. 5. A smoking article according to claim 1, wherein the porous carbon material has a BET surface area of 900 to 1300 m2/g. 6. A smoking article according to claim 5, wherein the porous carbon material has a BET surface area of from 1000 to 1250 m2/g. 7. A smoking article according to claim 1, wherein the pore volume of the porous carbon material in micropores and mesopores is from 1.1 to 2 cm3/g. 8. A smoking article according to claim 1, wherein from 35 to 55% of the pore volume of the porous carbon material is in mesopores. 9. A smoking article according to claim 1, wherein the porous carbon material is in the form of microbeads. 10. A smoking article according to claim 1, wherein the porous carbon material has a mean particle size of 50 to 700 microns. 11. A smoking article according to claim 10, wherein the porous carbon material has a mean particle size of 150 to 500 microns. 12. A smoking article according to claim 1, wherein the porous carbon material has a D90/D10 particle size distribution of at least 10. 13. A smoking article according to claim 1, wherein the porous carbon material is substantially free of particles smaller than 10 microns. 14. A smoking article according to claim 1, wherein the porous carbon material is composed of a carbonised organic resin. 15. A smoking article according to claim 14, wherein the organic resin contains nitrogen. 16. A smoking article according to claim 15, wherein the resin is produced by condensing a nucleophilic component with an electrophilic cross linking agent in the presence of a pore former. 17. A smoking article according to claim 15, wherein the nucleophilic component or the cross-linking agent is an organic nitrogen compound. 18. A smoking article according to claim 15, wherein the nucleophilic component comprises a novolak resin. 19. A smoking article according to claim 15, wherein the crosslinking agent comprises hexamethylene tetramine. 20. A smoking article according to claim 15, wherein the pore former comprises ethylene glycol. 21. A smoking article filter comprising a porous carbon material having: a BET surface area of about 900 to about 1638 m2/g,a pore structure that includes mesopores and micropores,a pore volume (as measured by nitrogen adsorption) of at least 0.9 cm3/g,a bulk density of not more than 0.5 g/cc,15 to 65% of the pore volume of the porous carbon material (as measured by nitrogen adsorption) is in mesopores, andthe porous carbon material is in particulate form having a mean particle size of 50 to 1000 microns. 22. A smoking article filter according to claim 21, wherein the pore volume (as measured by nitrogen adsorption) of the porous carbon material is at least 1.0 cm3/g and from 30 to 65% of the pore volume is in mesopores. 23. A smoking article filter according to claim 21, wherein less than 20% of the pore volume of the porous carbon material is in pores having diameters in the range 2-10 nm. 24. A smoking article filter according to claim 21, wherein the porous carbon material has a BET surface area of 900 to 1300 m2/g. 25. A smoking article filter according to claim 24, wherein the porous carbon material has a BET surface area of from 1000 to 1250 m2/g. 26. A smoking article filter according to claim 21, wherein the pore volume of the porous carbon material in micropores and mesopores is from 1.1 to 2 cm3/g. 27. A smoking article filter according to claim 21, wherein from 35 to 55% of the pore volume of the porous carbon material is in mesopores. 28. A smoking article filter according to claim 21, wherein the porous carbon material is in the form of microbeads. 29. A smoking article filter according to claim 21, wherein the porous carbon material has a mean particle size of 50 to 700 microns. 30. A smoking article filter according to claim 29, wherein the porous carbon material has a mean particle size of 150 to 500 microns. 31. A smoking article filter according to claim 21, wherein the porous carbon material has a D90/D10 particle size distribution of at least 10. 32. A smoking article filter according to claim 21, wherein the porous carbon material is substantially free of particles smaller than 10 microns. 33. A smoking article filter according to claim 21, wherein the porous carbon material is composed of a carbonised organic resin. 34. A smoking article filter according to claim 33, wherein the organic resin contains nitrogen. 35. A smoking article filter according to claim 33, wherein the resin is produced by condensing a nucleophilic component with an electrophilic cross linking agent in the presence of a pore former. 36. A smoking article filter according to claim 33, wherein the nucleophilic component or the cross-linking agent is an organic nitrogen compound. 37. A smoking article filter according to claim 33, wherein the nucleophilic component comprises a novolak resin. 38. A smoking article filter according to claim 33, wherein the crosslinking agent comprises hexamethylene tetramine. 39. A smoking article filter according to claim 33, wherein the pore former comprises ethylene glycol.
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