| 摘要 |
PURPOSE:To selectively extract and separate a specific component from a natural solid raw material and also to easily and properly control the content of the specific component and water in the natural solid raw material after treatment. CONSTITUTION:High pressure carbon dioxide is brought into contact with a tobacco raw material housed in a extractor 11 to dissolve and extract nicotine contained in the tobacco raw material into the high pressure carbon dioxide. Next, the high pressure carbon dioxide contg. the extracted nicotine is brought into contact with absorbing water 18 housed in an absorber 17 to absorb the nicotine. Then, the high pressure carbon dioxide from which the nicotine has been absorbed is again returned to the extractor 11 and circulated. Here, the inside of the extractor 11 is set in a pressure range of 200 to 300kg/cm<2> and in a temperature range of 50 to 80 deg.C, and the inside temperature of the absorber 17 is set in a range of 40-60 deg.C. The relative ratio of the water content to the high pressure carbon dioxide at extraction is set in the range of 55-80%. |
