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Rapid Continuous Supercritical CO2 Extraction and Separation of Organic Compounds from Liquid Solutions
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-04-16 , DOI: 10.1021/acs.iecr.8b00812
Tatsuya Fujii 1 , Yasuaki Matsuo 1 , Shin-ichiro Kawasaki 1
Affiliation  

An experimental apparatus was developed for rapid and continuous supercritical CO2 extraction and separation of hydrophobic organic compounds from liquid solution. The mixing of supercritical CO2 and liquid solutions in a micromixer enhances mass transfer, which enables rapid extraction of hydrophobic organic compounds. Near-equilibrium yields were obtained in about 10 s. The separation of supercritical CO2 from liquid was achieved using a newly developed separation system. In this separation system, the liquid level is controlled by the differential pressure between the head pressure and the supercritical CO2 phase. A control bulb at the outlet of the liquid line was regulated to maintain a constant differential pressure. The extraction of aqueous vanillin solution was conducted at 40 °C under pressures of 10, 15, and 20 MPa. Our results suggest that greater than 97% equilibrium was achieved in our system within the extraction time of 10 s. The extraction of a black liquor filtrate, that contains vanillin, its related compounds, and more than 5 wt % salts, was also conducted. More than 80% of the vanillin was successfully extracted to the CO2 phase.

中文翻译:

从液体溶液中快速连续超临界CO 2萃取和分离有机化合物

开发了一种用于快速连续地超临界CO 2萃取和从液体溶液中分离疏水性有机化合物的实验装置。在微混合器中将超临界CO 2和液体溶液混合可增强传质,从而能够快速提取疏水性有机化合物。在约10 s内获得了接近平衡的产量。使用新开发的分离系统可实现超临界CO 2从液体中的分离。在此分离系统中,液位由压头压力和超临界CO 2之间的压差控制阶段。调节液体管线出口处的控制球,以保持恒定的压差。香兰素水溶液的提取是在40℃,10、15和20 MPa的压力下进行的。我们的结果表明,在10 s的提取时间内,我们的系统中达到了97%以上的平衡。还进行了含有香草醛,其相关化合物和超过5 wt%盐的黑液滤液的提取。超过80%的香兰素已成功提取到CO 2相中。
更新日期:2018-04-17
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