CONCENTRATION OF MOIST TOBACCO EXTRACTS Russian patent published in 2024 - IPC A23L5/20 

FIELD: smoking accessories.

SUBSTANCE: invention relates to a method of producing a concentrated tobacco extract for use in an aerosol-generating article. Method includes: providing natural tobacco material; heating natural tobacco material to such temperature and for such time that volatile compounds are released from natural tobacco material, wherein the volatile compounds contain nicotine, and heating the natural tobacco material involves heating the natural tobacco material in a stream of an inert gas or in a stream of a combination of an inert gas with water or steam, or heating the natural tobacco material in a vacuum. Further, the released volatile compounds are collected, and a liquid tobacco extract obtained from the natural source is formed, containing the collected volatile compounds, a polyatomic alcohol and at least 40 percent by weight of water; then heating the liquid tobacco extract obtained from the natural source in order to evaporate at least some part of the water and obtain a concentrated tobacco extract. Tobacco extract obtained from the natural source is heated to such a temperature and for such a time that the water content in the tobacco extract is reduced by at least 60 percent.

EFFECT: invention reduces content of undesirable compounds, such as carbonyl compounds, including acetaldehyde and formaldehyde.

23 cl, 2 ex, 1 tbl