Extraction and Purification of Oryzanol from Rice Bran Oil and Rice Bran Oil Soapstock

Narayan, A. V. and Barhate, R. S. and Raghavarao, K. S. M. S. (2006) Extraction and Purification of Oryzanol from Rice Bran Oil and Rice Bran Oil Soapstock. Journal of American Oil Chemists Society, 83 (8). pp. 663-670.

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Abstract

<p align="justify">Oryzanol is an important value-added co-product of the rice and rice bran-refining processes. The beneficial effects of oryzanol on human health have generated global interest in developing facile methods for its separation from rice bran oil soapstock, a by-product of the chemical refining of rice bran oil. In this article we discuss the isolation of oryzanol and the effect that impurities have on its extraction and purification. Presented are the principles behind the extraction (solid-liquid or liquid-liquid extraction, and other methods) of these unit operations covered in selected patents. Methods other than extraction such as crystallization or precipitation-based or a combination of these unit operations also are reviewed. The problems encountered and the ways to solve them during oryzanol extraction, such as prior processing and compositional variation in soapstock, resistance to mass transfer, moisture content and the presence of surface active components, which cause emulsion formation, are examined. Engineering inputs required for solving problems such as saponification, increasing mass transfer area, and drying methods are emphasized. Based on an analysis of existing processes, those having potential to work in large-scale extraction processes are presented.</p>

Item Type:	Article
Uncontrolled Keywords:	by product utilization, extraction, impurities, oryzanol, processing, purification, rice, rice bran, rice bran oil, rice bran oil soapstock
Subjects:	600 Technology > 08 Food technology > 05 Processing and Engineering 600 Technology > 08 Food technology > 19 Lipids-oils/fats
Divisions:	Food Engineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	28 Feb 2007
Last Modified:	03 Oct 2018 09:17
URI:	http://ir.cftri.res.in/id/eprint/426

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