Flavor substances for smoking articles
First Claim
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1. A process for producing flavor substances from tobacco, comprising:
- (a) heating tobacco in an inert atmosphere to a temperature of at least about 200°
C., thereby driving off volatile materials from the tobacco;
(b) fractionating the volatile materials driven off by heating the tobacco; and
(c) collecting at least a portion of the fractionated volatile materials as flavor substances.
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Abstract
The flavor substances of the present invention are prepared by toasting (heating) natural tobacco in an inert atmosphere at a temperature of at least about 225° C., fractionating the volatiles and collecting at least a portion of the fractionated materials as the flavor substances. This fractionating and/or collecting can be conducted by condensation, liquid-liquid extraction, sorption (adsorption and/or absorption) and the like, with either a solid or liquid sorbent medium. Either the sorbent medium containing the trapped volatiles or the volatiles themselves may be used as the flavor substances of the present invention.
55 Citations
31 Claims
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1. A process for producing flavor substances from tobacco, comprising:
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(a) heating tobacco in an inert atmosphere to a temperature of at least about 200°
C., thereby driving off volatile materials from the tobacco;(b) fractionating the volatile materials driven off by heating the tobacco; and (c) collecting at least a portion of the fractionated volatile materials as flavor substances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 31)
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22. A process for producing flavor substances from tobacco, comprising:
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(a) heating tobacco in an inert atmosphere to a temperature of at least about 200°
C., thereby driving off volatile materials from the tobacco;(b) fractionating the volatile materials driven off by heating the tobacco via an organic--aqueous, liquid-liquid separation means; and (c) collecting at least a portion of the fractionated volatile materials as flavor substances. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A process for producing flavor substances from tobacco, comprising:
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(a) heating a first tobacco segment in an inert atmosphere at a temperature of about 475°
C., thereby driving off volatile materials from the tobacco;(b) heating a second tobacco segment in an inert atmosphere at a temperature of about 475°
C., thereby driving off volatile materials from the tobacco;(c) heating a third tobacco segment in an inert atmosphere at a temperature of about 325°
C., thereby driving off volatile materials from the tobacco;(d) passing the volatile materials from the first tobacco segment into the second tobacco segment, thereafter passing the combined volatiles through the third tobacco segment, thus yielding volatiles which are a mixture of all three tobacco segments; (e) fractionating the volatile materials combined in step (d) via an organic--aqueous, liquid-liquid separation means; and (f) collecting at least a portion of the fractionated volatile materials as flavor substances.
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30. A process for producing flavor substances from tobacco, comprising:
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(a) heating a first tobacco segment in an inert atmosphere at a temperature of about 475°
C., thereby driving off volatile materials from the tobacco;(b) heating a second tobacco segment in an inert atmosphere at a temperature of about 400°
C., thereby driving off volatile materials from the tobacco;(c) heating a third tobacco segment in an inert atmosphere at a temperature of about 325°
C., thereby driving off volatile materials from the tobacco;(d) independently collecting and combining the volatile materials from the three tobacco segments, thus yielding volatiles which are a mixture of all three tobacco segments; (e) fractionating the volatile materials combined in step (d) via an organic--aqueous, liquid-liquid separation means; and (f) collecting at least a portion of the fractionated volatile materials as flavor substances.
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Specification