Extraction of stevia glycosides with CO2 + water, CO2 + ethanol, and CO2 + water + ethanol
نویسندگان
چکیده
منابع مشابه
Supercritical CO2 Extraction of Ethanol
Extraction of ethanol was studied from both synthetic ethanol solution and fermentation broth using supercritical CO2 in an extraction apparatus in ranges of 313 to 333 K and 80 to 160 atmospheres, for varying extraction times. The experimental system consists mainly of four parts: a CO 2 storage system, a high-pressure liquid pump, an extractor and a product collection unit. Samples were analy...
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Biologically active polar substance 20-hydroxyecdysone was extracted from roots and leaves of Leuzea carthamoides with ethanol-modified dense carbon dioxide. The effect of operating conditions (pressure 20-27 MPa, temperature 40-60 oC, ethanol concentration in the solvent 4.3-7.1 wt.%, and solvent-to-feed ratio up to 100 g/g) on the extraction rate and the concentration in extract was examined....
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Water purification technologies such as microfiltration/ultrafiltration and reverse osmosis utilize porous membranes to remove suspended particles and solutes. These membranes, however, cause many drawbacks such as a high pumping cost and a need for periodic replacement due to fouling. Here we show an alternative membraneless method for separating suspended particles by exposing the colloidal s...
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Ethanol, with its high energy density, likely production from renewable sources and ease of storage and transportation, is almost the ideal combustible for fuel cells wherein its chemical energy can be converted directly into electrical energy. However, commercialization of direct ethanol fuel cells has been impeded by ethanol's slow, inefficient oxidation even at the best electrocatalysts. We ...
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Haematoccocus pluvialis is the main natural source of astaxanthin. Extraction with SuperCritical (SC) carbon dioxide (CO2) is an interesting choice for astaxanthin recovery because the medium-to-high yield, high selectivity for high-value compounds, and avoidance of thermal damage to labile bioactive compounds. In the case of heavy and/polar compounds such as astaxanthin, yield can be increased...
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ژورنال
عنوان ژورنال: Brazilian Journal of Chemical Engineering
سال: 2000
ISSN: 0104-6632
DOI: 10.1590/s0104-66322000000300003