Patent ID: 6772767
Filing Date: 2004-08-10
Classification: A24B

Abstract:
A method of making a tobacco material with reduced levels of lignin, and nitrogenous compounds comprising:(a) contacting a tobacco material with a first aqueous solvent at a temperature of about 250Â° C. to 80Â° C. for about 0.5 to 2 hours to provide an aqueous tobacco extract and a tobacco fiber portion; (b) separating said aqueous tobacco extract from said tobacco fiber portion; (c) contacting at a temperature from about 25Â° C. to 120Â° C. said tobacco fiber portion with a solution containing hydrogen peroxide and an alkali metal hydroxide wherein said solution contains said hydrogen peroxide in a concentration of from 2.5% to 12.0% (w/w) and said alkali metal hydroxide is from about 1% to 5% (w/w); and, (d) separating said solution from said tobacco fiber portion.