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US 9,788,568 B2Granted
Combination treatment of tobacco extract using antioxidants and antioxidant scavengers
AssigneePhilip Morris USA Inc.
InventorMarc Robert Krauss
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Abstract
A process for treating a tobacco material comprising: (a) extracting a tobacco material with a solvent to produce a tobacco extract and a tobacco residue; (b) contacting the tobacco extract with an antioxidant; and (c) contacting the mixture of (b) with an antioxidant scavenger, to produce a treated tobacco extract. The treated tobacco extract is reapplied to the tobacco residue to form a treated tobacco material. In addition, a smoking composition, a smoking article and a smokeless tobacco oral delivery product contain the treated tobacco material.
Claims18
A process for treating a tobacco material comprising:
- (a) extracting a tobacco material with a solvent to produce a tobacco extract and a tobacco residue, wherein the tobacco extract comprises at least one nitrite compound;
- (b) contacting the tobacco extract with an antioxidant, to produce a mixture having a reduced content of the at least one nitrite compound;
- and
- (c) contacting the mixture with an antioxidant scavenger, to produce a treated tobacco extract, wherein the antioxidant scavenger comprises a polymer selected from the group consisting of polyvinylimidizole (PVI), poly(vinylimidizole-co-vinylpyrrolidone) (PVI/PVP copolymer) and combinations thereof.
1 more element
Dependencies are inferred from the claim text.