Document Detail

Deacidification of high free fatty acid-containing rice bran oil by non-conventional reesterification process.
MedLine Citation:
PMID:  19145058     Owner:  NLM     Status:  MEDLINE    
Rice bran (Oryza sativa) oil is known for containing higher amount of free fatty acid (FFA) generated by hydrolytic enzyme. This FFA causes heavy neutral oil losses due to saponification and emulsification since it produces large amount of soap in the conventional alkali refining process. In the present study the FFA of degummed rice bran oil (RBO) was significantly reduced by reesterifying it with glycerol. The reesterification process was carried out by varying the temperature and amount of excess glycerol using 0.2% catalyst (SnCl(2)). The maximum efficiency of the process could be attained at 200 degrees C using 70% excess glycerol and the maximum reduction in acid value (from 24.3 to 3.0) of RBO was observed within 4 h. The reesterified RBO was used to prepare stand oil and varnish and their performance characteristics were compared with those of the products obtained from dehydrated castor oil (DCO).
Sibban Singh; R P Singh
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oleo science     Volume:  58     ISSN:  1347-3352     ISO Abbreviation:  J Oleo Sci     Publication Date:  2009  
Date Detail:
Created Date:  2009-01-15     Completed Date:  2009-03-30     Revised Date:  2009-08-11    
Medline Journal Info:
Nlm Unique ID:  101175339     Medline TA:  J Oleo Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  53-6     Citation Subset:  IM    
Department of Industrial Chemistry (Oils, Fats & Waxes), ISTAR, Vallabh Vidyanagar, India.
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MeSH Terms
Biotechnology / methods
Chemistry / methods
Fatty Acids / metabolism*
Food Analysis
Glycerol / chemistry
Oryza sativa / metabolism
Plant Oils / metabolism*
Solvents / chemistry
Tin Compounds / chemistry
Reg. No./Substance:
0/Fatty Acids; 0/Plant Oils; 0/Solvents; 0/Tin Compounds; 56-81-5/Glycerol; 68553-81-1/rice bran oil; 7772-99-8/stannous chloride

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