Please use this identifier to cite or link to this item:
Type: Artigo
Title: Solubility of γ-oryzanol in supercritical carbon dioxide and extraction from rice bran
Author: Bitencourt, Raphaela G.
Rammazzina Filho, Walter A.
Paula, Julia T.
Garmus, Tábata T.
Cabral, Fernando A.
Abstract: The γ-oryzanol is a complex mixture of triterpenic alcohols with ferulic acid esters of phytosterols, being an important nutraceutical in rice bran. In order to assess the ability of the supercritical carbon dioxide (scCO2) to extract γ-oryzanol from rice bran, the solubility of γ-oryzanol in scCO2 was measured at 40 °C, 60 °C, and 80 °C, and 200, 300, and 400 bar. A fractional extraction at 60 °C and 400 bar from rice bran containing 22.2% of oil with 1.55% γ-oryzanol was also performed. The mean solubility values ranged from 0.13 to 1.57 g γ-oryzanol/kg CO2, and a crossover pressure (CP) was observed at 300 bar. Below of the crossover pressure, the solubility decreased with increasing temperature and above, there is solubility increase with increasing temperature. Although Chrastil equation parameters have been correlated to experimental data, a high mean deviation of 9.0% was observed because it is a mixture of compounds. The presence of oil lowers the solubility of γ-oryzanol, which is the case of extraction from bran oil, showing that the nutraceutical is more concentrated at the final oil fraction or in the raffinate fractions
Subject: Farelo de arroz
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.supflu.2015.09.009
Date Issue: 2016
Appears in Collections:FEA - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
000366077100025.pdf924.67 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.