Organic compounds -- part of the class 532-570 series – Organic compounds – Fatty compounds having an acid moiety which contains the...
Patent
1996-10-31
1998-11-24
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Fatty compounds having an acid moiety which contains the...
554175, 554191, 554193, 554196, C07C 5143
Patent
active
058409459
ABSTRACT:
A method of refining and manufacturing a fat and oil containing polyunsaturated fatty acids which prevents production of peculiar fishy smells when such a fat and oil is added to food materials and while it is stored by preventing oxidation of PUFA's and restraining conversion of odor-emanating precursors into odor-emanating substances. A fat and oil, such as a marine animal oil, containing polyunsaturated fatty acids with 18 or more carbon atoms and three or more double bonds such as EPA and DHA is alkali refined and bleached. The thus alkali refined and bleached fat and oil is refined by bringing 100 parts by weight of it into contact for 10 minutes or more at 5.degree.-80.degree. C. with not less than 0.1 part by weight of powdered or granulated diatomaceous earth formed by calcining with a flux added such as sodium carbonate or sodium chloride. The fat and oil thus obtained is filtered and deodorized by steam distillation under vacuum.
REFERENCES:
patent: 5252762 (1993-10-01), Denton
patent: 5466441 (1995-11-01), Fisher et al.
Database WPI, Section Ch, Week 9517, Derwent Publications Ltd., London, GB; Class D13, AN 95-125653, XP002038776 & JP 07 047 266 A (Showa Kagaku Kogyo KK), Feb. 21, 1995, abstract.
Database WPI, Section Ch, Week 7750, Derwent Publications Ltd., London, GB; Class D23, AN 77-89262Y, XP002038777 & JP 52 132 007 A (Hara K), Nov. 5, 1977, abstract.
Hirata Kazuko
Kamigasa Satoru
Tsujiwaki Yoshikazu
Yamamoto Hiroshi
Carr Deborah D.
Geist Gary
Ueda Oils and Fats Mfg. Co., Ltd.
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