Process for removing nitrogen-containing anions and tobacco-specific nitrosamines from tobacco products
US5810020A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1993 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Sep 7, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24B15/26
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is disclosed a process for denitrifying tobacco materials and removing barium from tobacco materials, comprising mixing an aqueous-immiscible organic solvent containing a crown ether with an aqueous solution containing soluble components from tobacco materials, agitating this mixture, and separating the organic phase containing a crown ether-cation-nitrate (or nitrite) complex from the aqueous phase containing the denitrified tobacco materials, wherein the cation consists essentially of barium and potassium. There is further disclosed a process for eliminating tobacco-specific nitrosamines (TSNAs) from cured, denitrified tobacco material, comprising contacting the denitrified tobacco material with a trapping sink, wherein the trapping sink comprises a select transition metal complex which is readily nitrosated to form a nitrosyl complex with little kinetic or thermodynamic hindrance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.