Carbonaceous material having modified pore structure
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-021/18
B01J-027/20
B01J-023/00
B01J-023/02
B01J-023/06
B01J-023/40
B01J-023/74
C01B-031/00
C01B-031/02
C09C-001/56
A24F-001/20
A24F-013/06
A24D-001/04
A24D-003/00
A24D-001/00
A24B-015/18
A24B-015/00
A24B-001/00
출원번호
US-0274780
(2008-11-20)
등록번호
US-8119555
(2012-02-21)
발명자
/ 주소
Banerjee, Chandra Kumar
Sears, Stephen Benson
Jackson, Thaddeus Jude
출원인 / 주소
R. J. Reynolds Tobacco Company
대리인 / 주소
Womble Carlyle Sandridge & Rice, LLP
인용정보
피인용 횟수 :
6인용 특허 :
33
초록▼
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
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.
대표청구항▼
1. A method of increasing the mesopore volume of a porous activated carbon, comprising: coating a porous activated carbon with a liquid composition consisting essentially of a liquid carrier and a metal oxide to form a treated activated carbon; andcalcining the treated activated carbon for a time an
1. A method of increasing the mesopore volume of a porous activated carbon, comprising: coating a porous activated carbon with a liquid composition consisting essentially of a liquid carrier and a metal oxide to form a treated activated carbon; andcalcining the treated activated carbon for a time and at a temperature sufficient to increase the mesopore volume of the treated activated carbon. 2. The method of claim 1, wherein the liquid carrier is water. 3. The method of claim 1, wherein the metal is selected from the group consisting of alkali metals, alkaline earth metals, transition metals in Groups IIIB, IVB, VB, VIB VIIB, VIIIB, IB, and IIB, Group IIIA elements, Group IVA elements, lanthanides, and actinides. 4. The method of claim 1, wherein the metal oxide is cerium oxide. 5. The method of claim 1, wherein the temperature of the calcining step is between about 250° C. and about 500° C. 6. The method of claim 1, wherein said calcining occurs in a dry atmosphere. 7. The method of claim 6, wherein the dry atmosphere during the calcining step has a moisture level of no more than about 5 weight percent. 8. The method of claim 1, wherein said calcining step lasts for at least about 4 hours. 9. The method of claim 1, wherein the calcined activated carbon has a total mesopore volume of at least about 0.10 cc/g and a percentage of mesopore volume per total pore volume of at least about 15%. 10. The method of claim 1, wherein the calcined activated carbon has a total mesopore volume of at least about 0.12 cc/g and a percentage of mesopore volume per total pore volume of at least about 20%. 11. The method of claim 1, wherein the calcined activated carbon has 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%. 12. The method of claim 1, wherein the treated activated carbon comprises at least about 0.1 weight percent of the metal oxide. 13. The method of claim 1, wherein the treated activated carbon comprises at least about 1 weight percent of the metal oxide. 14. The method of claim 1, wherein the treated activated carbon comprises at least about 2 weight percent of the metal oxide. 15. An activated carbon prepared according to the method of claim 1. 16. A cigarette filter comprising the activated carbon of claim 15. 17. The method of claim 1, further comprising washing the calcined activated carbon to remove residual, metal oxide therefrom. 18. A method of increasing the mesopore volume of a porous activated carbon, comprising: coating a porous activated carbon with a liquid composition consisting essentially of a liquid carrier and a metal oxide to form a treated activated carbon comprising at least about 0.1 weight percent of the metal oxide;drying the treated activated carbon; andcalcining the treated activated carbon for a time and at a temperature sufficient to increase the mesopore volume of the treated activated carbon, wherein the calcining temperature is less than about 600° C. 19. An activated carbon prepared according to the method of claim 18. 20. A cigarette filter comprising the activated carbon of claim 19. 21. The method of claim 18, further comprising washing the calcinated activated carbon to remove residual metal oxide therefrom. 22. A method of increasing the mesopore volume of a porous activated carbon, comprising: coating a porous activated carbon with an aqueous composition consisting essentially of water and cerium oxide to form a treated activated carbon;drying the treated activated carbon; andcalcining the treated activated carbon, in a dry atmosphere, for at least about 4 hours and at a temperature of at least about 250° C. in the absence of steam, such that the calcined activated carbon has a total mesopore volume of at least about 0.10 cc/g and a percentage of mesopore volume per total pore volume of at least about 15%. 23. An activated carbon prepared according to the method of claim 22. 24. A cigarette filter comprising the activated carbon of claim 23. 25. The method of claim 22, further comprising washing the calcined activated carbon to remove residual cerium oxide therefrom. 26. 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%. 27. A cigarette filter comprising the activated carbon of claim 26. 28. The cigarette filter of claim 27, comprising a cavity positioned between two sections of fibrous filter material, the activated carbon positioned within the cavity and in granular form. 29. The cigarette filter of claim 27, comprising at least one section of fibrous filter material, the activated carbon being in granular form and imbedded in the fibrous filter material. 30. A method of increasing the mesopore volume of a porous activated carbon, comprising: coating a porous activated carbon with a liquid composition consisting essentially of a liquid carrier and a metal oxide precursor to form a treated activated carbon;calcining the treated activated carbon for a time and at a temperature sufficient to thermally decompose the metal oxide precursor into a corresponding metal oxide and react the metal oxide with the activated carbon to increase the mesopore volume of the treated activated carbon. 31. The method of claim 30, wherein said calcining step lasts for at least about 4 hours. 32. The method of claim 30, wherein the calcined activated carbon has a total mesopore volume of at least about 0.10 cc/g and a percentage of mesopore volume per total pore volume of at least about 15%. 33. The method of claim 30, wherein the calcined activated carbon has a total mesopore volume of at least about 0.12 cc/g and a percentage of mesopore volume per total pore volume of at least about 20%. 34. The method of claim 30, wherein the calcined activated carbon has 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%. 35. The method of claim 30, wherein the treated activated carbon comprises at least about 0.1 weight percent of the metal oxide precursor. 36. The method of claim 30, wherein the treated activated carbon comprises at least about 1 weight percent of the metal oxide precursor. 37. The method of claim 30, wherein the treated activated carbon comprises at least about 2 weight percent of the metal oxide precursor. 38. The method of claim 30, wherein the metal oxide precursor is in the form of a metal salt selected from the group consisting of citrates, nitrates, ammonium nitrates, sulfates, cyanates, hydrides, amides, thiolates, carbonates, halides, and hydrates thereof. 39. The method of claim 30, wherein the metal oxide precursor comprises cerium. 40. The method of claim 30, further comprising washing the calcined activated carbon to remove residual metal oxide therefrom.
Nystrom William S. (St. Marys PA) Lanzel Leo C. (St. Marys PA) Lanzillotti Harry V. (Midlothian VA) Hayward Charles R. (Midlothian VA) Lilly ; Jr. A. C. (Chesterfield VA) Hearn John R. (Midlothian VA, Carbon heat source.
Shannon Michael D. (Lewisville NC) Lehman Richard L. (Belle Mead NJ) Resce James L. (Yadkinville NC) Furin Olivia P. (Clemmons NC) Meers Joseph T. (Fairview Park OH) Riggs Dennis M. (Belews Creek NC), Catalyst containing smoking articles for reducing carbon monoxide.
Hajaligol Mohammad R. (Richmond VA) Deevi Seetharama C. (Midlothian VA) Ariprala Sarojini D. (Midlothian VA) Losee Donald B. (Richmond VA) Waymack Bruce E. (Prince George VA) Watkins Michael L. (Rich, Chemical heat source comprising metal nitride, metal oxide and carbon.
Clearman Jack F. (Blakely GA) Chiou Joseph J. (Clemmons NC) Williams Darrell D. (Winston-Salem NC) Casey William J. (Clemmons NC) Gentry Thomas L. (Winston-Salem NC) Squires William C. (Winston-Salem, Cigarette.
Jupe, Richard; Dwyer, Ronald William; Laslie, Don Earl; Finley, Arlington L.; Taylor, Barbara G.; Smith, Cecil M.; Willis, Vivian E., Cigarette and filter with downstream flavor addition.
Blakley Richard L. (Pfafftown NC) Shelar Gary R. (Greensboro NC) Gentry Jeffery S. (Pfafftown NC) Worrell Gary W. (Tobaccoville NC) Perfetti Thomas A. (Winston-Salem NC), Cigarette filter.
Gentry Jeffery S. (Pfafftown NC) Womble Karen M. (Winston-Salem NC) Banerjee Chandra K. (Pfafftown NC) Blakley Richard L. (Pfafftown NC) Barnes Russell D. (Belews Creek NC) Calleson Donald A. (Winsto, Cigarette filter.
Arterbery Cynthia W. (Midlothian VA) Callaham W. Timothy (Richmond VA) Keritsis Gus D. (Richmond VA) Laslie Donald E. (Midlothian VA) Newman Kenneth A. (Prince George VA) Slagle Roger S. (Chesterfiel, Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core.
Xue, Lixin Luke; Koller, Kent B.; Gao, Qiong, High efficiency cigarette filters having shaped microcavity fibers impregnated with adsorbent or absorbent materials.
Deevi Seetharama C. (Midlothian VA) Deevi Sarojini (Midlothian VA) Hajaligol Mohammad R. (Richmond VA) Lanzillotti Harry V. (Midlothian VA) Lilly ; Jr. Arnys C. (Chesterfield VA) Losee D. Bruce (Rich, Manufacturing of composite heat sources containing carbon and metal species.
Bensalem Azzedine (134 Joralemon St. Brooklyn NY 11201) Deevi Sarojini (8519 Whirlaway Dr. Midlothian VA 23112) Deevi Seetharama C. (8519 Whirlaway Dr. Midlothian VA 23112) Schleich Donald M. (La Ria, Method for making a carbonaceous heat source containing metal oxide.
Bensalem Azzedine (Brooklyn NY) Deevi Sarojini (Midlothian VA) Deevi Seetharama C. (Midlothian VA) Schleich Donald M. (Carquefou FRX), Method for making a carbonaceous heat source containing metal oxide.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.