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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Rice bran oil extraction using alcoholic solvents: Physicochemical characterization of oil and protein fraction functionality

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Capellini, Maria C. ; Giacomini, Vanessa ; Cuevas, Maite S. ; Rodrigues, Christianne E. C.
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: INDUSTRIAL CROPS AND PRODUCTS; v. 104, p. 133-143, OCT 1 2017.
Citações Web of Science: 18

Rice bran, an underutilized rice processing by-product, is a promising source for food and biodiesel oil production and can also be used to produce protein for use in human food products. The main objective of this study was to assess the feasibility of replacing hexane, which is traditionally used to extract vegetable oils, with safer solvents, i.e., ethanol and isopropanol, in rice bran oil (RBO) extraction. Thus, the effects of the solvent type on the physicochemical characteristics of the oil and defatted bran products were studied. The results showed that the presence of water in the alcoholic solvents negatively affected the oil extraction; however, using absolute solvents in single-stage batch extractions at 80 degrees C resulted in oil yields of up to approximately 80%. The solvent water content and process temperature strongly impacted the properties of the protein fraction; the nitrogen solubility index (NSI) decreased from approximately 40% for the absolute solvents to 17 and 15% for the aqueous ethanol and isopropanol, respectively, when the extraction was performed at 80 degrees C. More of the minor nutraceutical compounds were transferred from the oleaginous matrix to the oil by aqueous ethanol than by hexane, yielding RBO with 1.53% gamma-oryzanol and 769 mg/kg tocotrienols. On the other hand, absolute isopropanol exhibited a higher tocopherol extraction capacity; RBO with a tocopherol content of 98.1 mg/kg was obtained with this solvent. Based on these results, short-chain alcohols are promising alternatives to the conventional extraction solvent, because they enable high-quality protein fractions and oils to be obtained and add value to the rice production chain. (AU)

Processo FAPESP: 13/13339-6 - Viabilidade Técnica do Emprego de Solventes Alcoólicos na Extração de Óleos Vegetais: Caracterização Físico-Química do Óleo, Funcionalidades da Fração Proteica e Recuperação do Solvente
Beneficiário:Maria Carolina Capellini
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 10/13285-5 - Extração de Óleo de Farelo de Arroz utilizando Solventes Alcoólicos: Avaliação de Alterações na Fração Proteica e na Composição do Óleo
Beneficiário:Maria Carolina Capellini
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 14/09446-4 - Desenvolvimento de processo de extração de óleos vegetais utilizando solventes alcoólicos: avaliação da composição do óleo e de alterações na fração protéica
Beneficiário:Christianne Elisabete da Costa Rodrigues
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 14/21252-0 - Equilíbrio e processos de produção de biocombustíveis e bioprodutos
Beneficiário:Antonio José de Almeida Meirelles
Linha de fomento: Auxílio à Pesquisa - Temático