US Patent 8360072 Combination treatment of tobacco extract using antioxidants and antioxidant scavengers

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.