Tobacco expansion method

Details Tobacco expansion method Tobacco expansion method

1995-07-28

1997-01-07

Bahr, Jennifer

Tobacco

Tobacco treatment

Puffing

131901, 131902, A24B 318

Patent

active

055906672

ABSTRACT:
A tobacco expansion method is provided whereby cured tobacco is first moistened with a humectant solution, as is conventional in the industry, to increase the resident liquids thereof. Next, the prepared tobacco in shredded form is placed in a sealed chamber and the chamber evacuated to vaporize a portion of the resident liquids. Next, ethyl alcohol vapor is allowed to enter the pressure chamber below 70 mm (Hg) absolute to prevent a water-ethyl alcohol azeotrope from forming. Thereafter, a hydrocarbon vapor, such as n-pentane vapor, is directed into the chamber and the pressure restored to atmospheric. The n-pentane vapor diffuses into the cellular structure of the tobacco with the assistance of the ethyl alcohol, whereafter the tobacco is heated and the n-pentane and ethyl alcohol acts as a propellant to expand the tobacco.

REFERENCES:
patent: 1789435 (1931-01-01), Hawkins
patent: 3144871 (1964-08-01), De Souza et al.
patent: 3524451 (1970-08-01), Fredrickson
patent: 3524452 (1970-08-01), Moser et al.
patent: 3753440 (1973-08-01), Ashburn
patent: 3771533 (1973-11-01), Armstrong et al.
patent: 4531529 (1985-07-01), White et al.
patent: 4641665 (1987-02-01), Hedge et al.
patent: 4696313 (1987-09-01), Brown et al.
patent: 5065774 (1991-11-01), Grubbs et al.
patent: 5469872 (1995-11-01), Beard et al.

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