6 results for “Supercritical CO2”

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Research ArticleOpen accessPhrase in the titleSupercritical CO2 Extraction of Heavy Metals Cu, Zn and Cd from Aqueous Solution using D ithizone as Chelating AgentJeton Halili, Altin Mele, Tahir Arbneshi, Ilir MazrekuMetal ions in liquid samples can be extracted by supercritical CO2, containing a suitable ligand. This paper presents the first experimental data for the extraction of three heavy metals Cu, Zn and Cd from aqueous samples in the presence of Dithizone as chelating agent. Extractions by supercritical CO2 have been performed at 120 bars with 50°C used dynamic technique. After … …American Journal of Applied Sciences, Vol. 12, Issue 4 · 22 Jun 2015 · 7,306 accessesView PDF Cite

Research ArticleOpen accessIn the abstractIntegrated Supercritical Fluid Extraction and BioprocessingOwen Catchpole, Stephen Tallon, Peter Dyer et al.Supercritical fluids are increasingly being used and promoted at a laboratory and pilot scale to produce high value, natural bioactives from biologically based raw materials. Supercritical CO2 is overwhelmingly the solvent of choice for these operations, but is largely limited to the processing of dry raw materials and the extraction of low polarity, low molecular weight compounds. The use of … …American Journal of Biochemistry and Biotechnology, Vol. 8, Issue 4 · 25 Dec 2012 · 9,488 accessesView PDF Cite

Research ArticleOpen accessIn the abstractA Review on Supercritical Fluid Extraction as New Analytical MethodK. A. Abbas, A. Mohamed, A. S. Abdulamir, H. A. AbasThis review study summarized the Supercritical Fluid Extraction (SFE) as new analytical method. The advantage and disadvantage of CO2 (SC-CO2 )as well as special applications of SFE in food processing such as removal of fat from food, enrichment of vitamin E from natural sources, removal of alcohol from wine and beer, encapsulation of liquids for engineering solid products and extraction … …American Journal of Biochemistry and Biotechnology, Vol. 4, Issue 4 · 31 Dec 2008 · 10,498 accessesView PDF Cite

Research ArticleOpen accessIn the abstractExtraction and Identification of Water-Soluble Compounds in Palm-Pressed Fiber by SC-CO2 and GC-MSHarrison Lau Lik Nang, Choo Yuen May, Ma Ah Ngan, Chuah Cheng HockThe residual oil recovered from palm-pressed fiber is known to contain high level of carotenes (4,000 mg kgˉ1 to 6,000 mg kgˉ1) and vitamin E such as tocopherols and tocotrienols (2,000 mg kgˉ1 to 3,000 mg kgˉ1). In this study, the water-soluble compounds in fresh palm-pressed fiber were recovered by supercritical carbon dioxide (SC-CO2) extraction. The concentration of these compounds … …American Journal of Environmental Sciences, Vol. 3, Issue 2 · 30 Jun 2007 · 8,323 accessesView PDF Cite

Research ArticleOpen accessIn the abstractA Study of Residual Oils Recovered from Spent Bleaching Earth: Their Characteristics and ApplicationsLoh Soh Kheang, Cheng Sit Foon, Choo Yuen May, Ma Ah NganThis study described the extraction of residual oils of spent bleaching earth (SBE) from palm oil refining industry, the properties and applications of residual oils obtained there from. Residual oils of SBE (acid-activated, WAC and neutral, NC) were recovered via solvent and supercritical-fluid (SC-CO2) extraction. The yields of residual oils recovered from WAC were higher than those from NC using … …American Journal of Applied Sciences, Vol. 3, Issue 10 · 31 Oct 2006 · 9,231 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSupercritical Fluid Extraction of Palm CarotenoidsPuah C. Wei, Choo Y. May, Ma A. Ngan, Chuah C. HockThe extraction of carotenoids from crude palm oil was carried out in a dynamic (flow- through) supercritical fluid extraction system. The carotenoids obtained were quantified using off-line UV-visible spectrophotometry. The effects of operating pressure and temperature, flow rate of the supercritical carbon dioxide (SC-CO2), sample size of feed used on the solubility of palm carotenoids were investigated. The results showed … …American Journal of Environmental Sciences, Vol. 1, Issue 4 · 31 Dec 2005 · 8,762 accessesView PDF Cite