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A method for extracting nicotine-rich composition from tobacco leaves
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A nicotine and composition technology, which is applied in the field of subcritical fluid extraction, can solve the problems of low nicotine content and cannot be used medicinally, and achieves the effect of low cost
Active Publication Date: 2022-06-28
台湾三益创价生技有限公司 +3
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[0014] The technical problem to be solved by this invention is that the existing method for extracting nicotine from tobacco leaves has a low content of nicotine in the extraction product and cannot be used for medicine
Method used
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Embodiment 1
[0070] Tobacco leaves are washed, dried, and then pulverized into 1-10 mm pieces. Weigh 700 grams of tobacco leaf fragments, pour them into the extraction tank of the subcritical propane fluid extraction equipment, and exhaust the original air in the equipment; inject propane (8 bar) with the same pressure as the propane storage tank; set the extraction conditions as: propane flow rate 12 liters / hour, extraction tank pressure 45bar / temperature 65℃, separation tank pressure 8-10bar / temperature 50℃. Carry out propane subcritical extraction with above-mentioned conditions for half an hour (this is front section extraction), take out 89.0 grams of front section extract, its GC-MS collection of illustrative plates is referring to Figure 11 , in which the nicotine content is 32.23%, and the purity is not high. The extract in the previous section can be used for other purposes or further purified; continue to carry out the subcritical extraction of propane for half an hour (this is...
Embodiment 2～15
[0072] Similar to embodiment 1, but the subcritical extraction conditions are slightly different, see Table 1, and the amount and purity of the obtained product are also shown in Table 1. Wherein the GC-MS spectra of Examples 1, 2, 4, 6, 7, 10, 11, 14, and 15 refer to figure 2 , 3 , 4, 5, 6, 7, 8, 9, 10.
[0073] Table 1: SPE conditions and product weight (g) and purity (%) of Preliminary Examples 1-14.
[0074]
[0075] As can be seen from Table 1, adopt the method for extracting nicotine composition from tobacco leaves provided by the present invention, utilize subcritical propane fluid to carry out segmental extraction, and the nicotine purity in the obtained extraction product (rear section extract) is greater than 90%, which can be used for medicinal purposes. .
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Abstract
The invention discloses a method for extracting a nicotine-rich composition from tobacco leaves, and relates to the technical field of subcritical fluid extraction. The method comprises: (1) washing, drying, and crushing the tobacco leaves into pieces; (2) pouring the tobacco leaf pieces into an extraction tank of a subcritical propane fluid extraction equipment to carry out the front-stage extraction of the subcritical propane fluid; (3) removing the (4) carry out the back stage extraction of subcritical propane fluid; (5) import the back stage extract obtained by the back stage extraction into a separation tank; (6) remove the propane in the back stage extract liquid to obtain A composition rich in nicotine; wherein, the subcritical propane fluid extraction condition is a propane flow rate of 8 to 15 liters per hour, an extraction tank pressure of 30 to 55 bar, and an extraction tank temperature of 30 to 75°C; the overall extraction time of the subcritical propane fluid is 40 to 90 minutes, and the extraction time in the latter stage is 1 / 3 to 1 / 2 of the overall extraction time. Through the method provided by the invention, a composition rich in nicotine can be obtained.
Description
technical field [0001] The present invention relates to the technical field of subcritical fluid extraction, in particular to a method for extracting a nicotine-rich composition from tobacco leaves. Background technique [0002] Nicotine, commonly known as nicotine, is an alkaloid present in Solanaceae plants (Solanum), an important component of tobacco, and a representative of N choline receptor agonists. It has a role in the central nervous system and can be used medicinally. [0003] To extract nicotine from tobacco leaves, the currently known extraction methods, whether it is water extraction, organic solvent extraction, supercritical fluid extraction, or even subcritical extraction, are used to remove nicotine, not to extract high purity nicotine, and the nicotine content / purity in its removal is not high enough to be used as medicinal nicotine. [0004] US Patent No. 9,004,074 proposes a method for solvent extraction of tobacco using chloroform, dichloromethane or ch...
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