Extraction Of Tobacco Aromatic Substance And Simulation Of The Extract Purification Process

In the cigarette production, abandoned tobacco is a large amount of byproduct, the reasonable development of tobacco castoff and recycling waste can have the huge economic efficiency, the environment benefit and the social benefit. This article uses tobacco castoff to research.To obtain the tobacco aromatic substance by the method of stream distillation and the ultrasonic-assisted extraction, the optimum extraction condition was investigated by single experiment and designed orthogonal experiments. And by the application of GC-MS techniques, constituents of tobacco aromatic substance extracted were indentified.The results of the optimization conditions in stream distillation research were confirmed as follows:distillation time 2 h, material to solvent ratio 1:35,marinating time 0 h and NaCl concentration 2%.The average rate of essential oils on the optimization condition was 1.710%. And 56 kinds of chemical composition were detected. Neophytadiene content was 52.49% while L-Nicotine content was 0.32% and that of major carotenoid degrading products of flue-cured tobacco was 14.07%.In the ultrasonic-assisted extraction research, the results of the optimization conditions were confirmed as follows:marinating time 20 min, ultrasonic power 70W, ultrasonic time 50min, material to solvent ratio 1:6. The average rate of the tobacco extract on the optimization condition was 3.863%. By the application of GC-MS techniques, constituents of the extract were indentified, and 47 kinds of chemical composition were detected. L-Nicotine content was 25.41%; neophytadiene content was 38.55% while that of thunbergol was 13.82%.When it comes to the designed purification process of the extract, it is possible to obtain not only the product tobacco essential oil, but also byproduct high-purity nicotine. Moreover the n-hexane can be recycled. This design can enhance the added value and reduce the cost while it raises the output and purity.Simulating the separation process of nicotine and n-hexane by Aspen Plus, obtained operation parameters and design variable of rectification column can provide the reference for the experiment and industrial production.