It has been observed that a small amount of tobacco shreds, tobacco dust and other defective materials will be produced during the rolling and processing of cigarettes. Reprocessing them into cigarettes will affect the intrinsic quality of cigarettes. If they are directly discarded, it will not only cause pollution, but also be a waste of resources. These waste tobaccos contain a variety of valuable components, such as nicotine, solanesol, sugars, organic acids, etc. In order to maximize the effect and benefits, nicotine, tobacco oil and other valuable components can be extracted by supercritical CO2 extraction or solvent extraction, which can play a role in turning waste into treasure and comprehensive utilization, which can not only improve the overall benefits, but also protect the environment.
In nicotine extraction, water is an indispensable additive. Using supercritical CO2 to extract nicotine, using water and ethanol as entrainers, and adjusting the moisture content in tobacco to increase the solubility of nicotine in supercritical CO2, a better extraction effect can be achieved. Nicotine is widely used in chemical industry, pesticide and medicine. As an intermediate raw material for the treatment of cardiovascular diseases, skin diseases and other diseases, the demand is increasing. In particular, high-purity natural nicotine has become one of the most in-demand products in the international market. Using tobacco leaves as raw materials, supercritical carbon dioxide extraction, acid-base pretreatment and column chromatography separation processes are used to separate and purify nicotine, and pure nicotine with a purity of more than 98% can be obtained.
