IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0741482
(2003-12-22)
|
등록번호 |
US-8381738
(2013-02-26)
|
발명자
/ 주소 |
- Luan, Zhaohua
- Gee, Diane L.
- Nepomuceno, Jose
- Zhuang, Shuzhong
- Fournier, Jay A
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
27 |
초록
▼
Smoking articles, filters, and methods for selectively removing selected components from tobacco smoke are disclosed. The smoking articles and filters include composites composed of a porous alumina and/or aluminosilicate matrix containing particles of activated carbon and zeolite molecular sieve ad
Smoking articles, filters, and methods for selectively removing selected components from tobacco smoke are disclosed. The smoking articles and filters include composites composed of a porous alumina and/or aluminosilicate matrix containing particles of activated carbon and zeolite molecular sieve adsorbents distributed throughout the matrix which can selectively remove selected components of tobacco smoke. The composites may be made by admixing the adsorbent mixture and a binder such as aluminum hydroxide or montmorillonite clay, adding an aqueous mineral acid to gel the mixture and drying and firing the gel paste. The proportions and adsorption capacities of the components can be selected to tailor the adsorption characteristics of the composites to selectively remove targeted constituents such as acrolein and 1,3-butadiene in tobacco smoke. Methods for making filters and smoking articles using the composites, as well as methods for smoking products comprising the composites, are also provided.
대표청구항
▼
1. A smoking article comprising tobacco and a filter component comprising a composite of a porous alumina and/or aluminosilicate matrix containing particles of at least one activated carbon and particles of at least one molecular sieve distributed throughout pores of the matrix. 2. The smoking artic
1. A smoking article comprising tobacco and a filter component comprising a composite of a porous alumina and/or aluminosilicate matrix containing particles of at least one activated carbon and particles of at least one molecular sieve distributed throughout pores of the matrix. 2. The smoking article of claim 1, wherein the matrix is material which was gelled by contact with an acid. 3. The smoking article of claim 2, wherein the material comprises aluminum hydroxide, alumina boehmite, or a montmorillonite-containing clay. 4. The smoking article of claim 1, wherein the molecular sieve comprises a crystalline alumino-silicate, a zeolite, a silicoaluminophosphate or a mesoporous molecular sieve. 5. The smoking article of claim 1, wherein the molecular sieve comprises an alumina-silicate zeolite. 6. The smoking article of claim 1, wherein the article is a cigarette. 7. The smoking article of claim 1, wherein the composite is located in the filter component of a cigarette. 8. The smoking article of claim 1, wherein the activated carbon has a pore size of about 3-500 Å. 9. The smoking article of claim 1, wherein the composite has an average surface area of from about 20 to 1500 m2/g. 10. The smoking article of claim 1, wherein the composite is in the form of a powder, granules, monolith or mixtures thereof. 11. The smoking article of claim 7, wherein the filter component is a mono filter, a dual filter, a triple filter, a cavity filter, a recessed filter or a free-flow filter. 12. The smoking article of claim 7, wherein the filter component comprises paper or fibers. 13. The smoking article of claim 7, wherein the filter component comprises cellulose acetate tow, cellulose paper, mono cellulose, mono acetate or combinations thereof. 14. The smoking article of claim 1, wherein the filter component comprises at least one cigarette filter part selected from the group consisting of a shaped paper inset, a plug, a space, cigarette filter paper, and a free-flow sleeve. 15. A smoking article comprising a filter component comprising a composite comprising a porous alumina and/or aluminosilicate matrix containing particles of at least one activated carbon and at least one zeolite molecular sieve distributed throughout the pores of the matrix. 16. A smoking article comprising tobacco cut filler, cigarette paper and/or cigarette filter material, further including a composite capable of selectively removing components from cigarette smoke, wherein the composite comprises particles of at least one activated carbon and at least one zeolite dispersed uniformly within a porous aluminosilicate or alumina matrix. 17. The smoking article of claim 15, wherein said composite is prepared by acidifying a composition containing aluminum hydroxide or montmorillonite clay admixed with particles of an activated carbon and a zeolite to form a gel and heating the gel up to temperatures of about 300° C. 18. The smoking article of claim 15, wherein said article is a cigarette. 19. A method of treating mainstream smoke produced by a tobacco rod in a cigarette comprising (a) a tobacco rod, and (b) a filter component comprising a composite of a porous alumina and/or aluminosilicate matrix containing particles of at least one activated carbon and particles of at least one molecular sieve distributed throughoutpores of the matrix, comprising lighting the cigarette to form smoke,drawing the smoke through the filter component, andreducing the amount of selected constituents in the smoke by contact with the composite during the smoking of the cigarette. 20. The method of claim 19, wherein the selected constituents are selected from acrolein, dienes, aldehydes, aromatics, HCN, nitriles or mixtures thereof. 21. The smoking article of claim 16, wherein the composite is located in a filter component of the cigarette. 22. A cigarette comprising tobacco and a filter component comprising a composite of a porous alumina and/or aluminosilicate matrix containing particles of an activated carbon and particles of at least one zeolite molecular sieve distributed within pores of the matrix. 23. The cigarette of claim 22, wherein the cigarette is suitable for use with an electrical smoking system. 24. A method of treating mainstream smoke produced by a tobacco rod in a cigarette in an electrical smoking system comprising (a) a tobacco rod, (b) a filter component comprising a composite of a porous alumina and/or aluminosilicate matrix containing particles of an activated carbon and particles of at least one zeolite molecular sieve distributed within pores of the matrix located at one end of the tobacco rod, and (c) a heating element or heat source located adjacent the tobacco rod comprising electrically heating the cigarette in the electrical smoking system to form smoke,drawing the smoke through the filter component, andselectively removing at least one selected component from the smoke by contact with the composite during the smoking of the cigarette. 25. The method of claim 24, wherein the composite selectively removes at least one of acrolein, HCN, nitriles, dienes, aromatics, aldehydes and mixtures thereof from mainstream smoke.
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