Effects of the extraction conditions on the yield and composition of rice bran oil extracted with ethanol-A response surface approach

Autor(es)

Oliveira, Ramon ^[1] ; Oliveira, Vinicius ^[1] ; Aracava, Keila Kazue ^[1] ; Rodrigues, Christianne Elisabete da Costa ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Food Engn ZEA FZEA, Separat Engn Lab LES, BR-13635900 Pirassununga, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FOOD AND BIOPRODUCTS PROCESSING; v. 90, n. C1, p. 22-31, JAN 2012.
• Citações Web of Science: 43

Resumo

Rice bran oil was obtained from rice bran by solvent extraction using ethanol. The influence of process variables, solvent hydration (0-24% of water, on mass basis), temperature (60-90 degrees C), solvent-to-rice bran mass ratio (2.5:1 to 4.5:1) and stirrer speed (100-250 rpm) were analysed using the response surface methodology. The extraction yield was highly affected by the solvent water content, and it varied from 8.56 to 20.05 g of oil/100 g of fresh rice bran (or 42.7-99.9% of the total oil available) depending on the experimental conditions. It was observed that oryzanol and tocols behave in different ways during the extraction process. A larger amount of tocols is extracted from the solid matrix in relation to gamma-oryzanol. It was possible to obtain values from 123 to 271 mg of tocols/kg of fresh rice bran and 1527 to 4164 mg of oryzanol/kg of fresh rice bran, indicating that it is feasible to obtain enriched oil when this renewable solvent is used. No differences in the chemical composition of the extracted oils were observed when compared to the data cited in the literature. (C) 2011 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/00565-4 - Extração alcoólica de óleos vegetais: estudo do equilíbrio sólido líquido e da etapa de recuperação do solvente
• Beneficiário: Christianne Elisabete da Costa Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 06/04819-0 - Extracao de oleo de farelo de arroz com etanol: impacto do nivel de hidratacao do solvente no teor de gama orizanol.
• Beneficiário: Ramon Oliveira Beatriz
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 09/17855-3 - Equilíbrio sólido-líquido, cinética de extração de componentes minoritários e projeto de extratores na extração de óleos vegetais com etanol
• Beneficiário: Christianne Elisabete da Costa Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Regular