Extraction of stevia glycosides with CO2 plus water, CO2 plus ethanol, and CO2 plus water plus ethanol

dc.creatorPasquel, A
dc.creatorMeireles, MAA
dc.creatorMarques, MOM
dc.creatorPetenate, AJ
dc.date2000
dc.dateSEP
dc.date2014-07-30T17:34:16Z
dc.date2015-11-26T17:42:42Z
dc.date2014-07-30T17:34:16Z
dc.date2015-11-26T17:42:42Z
dc.date.accessioned2018-03-29T00:24:40Z
dc.date.available2018-03-29T00:24:40Z
dc.identifierBrazilian Journal Of Chemical Engineering. Brazilian Soc Chemical Eng, v. 17, n. 3, n. 271, n. 282, 2000.
dc.identifier0104-6632
dc.identifierWOS:000089036900003
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/66592
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/66592
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1287376
dc.descriptionStevia leaves are an important source of natural sugar substitute. There are some restrictions on the use of stevia extract because of its distinctive aftertaste. Some authors attribute this to soluble material other than the stevia glycosides, even though it is well known that stevia glycosides have to some extent a bitter taste. Therefore, the purpose of this work was to develop a process to obtain stevia extract of a better quality. The proposed process includes two steps: i) Pretreatment of the leaves by SCFE; ii) Extraction of the stevia glycosides by SCFE using CO2 as solvent and water and/or ethanol as cosolvent. The mean total yield for SCFE pretreatment was 3.0%. The yields for SCFE with cosolvent of stevia glycosides were below 0.50%, except at 120 bar, 16 degrees C, and 9.5% (molar) of water. Under this condition, total yield was 3.4%. The quality of the glycosidic fraction with respect to its capacity as sweetener was better for the SCFE extract as compared to extract obtained by the conventional process. The overall extraction curves were well described by the Lack extended model.
dc.description17
dc.description3
dc.description271
dc.description282
dc.languageen
dc.publisherBrazilian Soc Chemical Eng
dc.publisherSao Paulo
dc.publisherBrasil
dc.relationBrazilian Journal Of Chemical Engineering
dc.relationBraz. J. Chem. Eng.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectstevia
dc.subjectsupercritical extraction
dc.subjectmass transfer
dc.subjectstevioside
dc.subjectrebaudioside-A
dc.subjectglycoside
dc.subjectcosolvent
dc.subjectwater
dc.subjectethanol
dc.titleExtraction of stevia glycosides with CO2 plus water, CO2 plus ethanol, and CO2 plus water plus ethanol
dc.typeArtículos de revistas


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