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Rice bran oil. VIII. Tank settlings from crude rice bran oil as a source of wax
Author(s) -
Cousins Edwin R.,
Fore S. P.,
Janssen H. J.,
Feuge R. O.
Publication year - 1953
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02639911
Subject(s) - wax , chemistry , fractionation , rice bran oil , iodine value , chromatography , fraction (chemistry) , acid value , saponification , hydrogen peroxide , bran , organic chemistry , raw material , biochemistry
Summary A typical sample of tank settlings from cruce rice bran oil was processed in various ways to obtain a hard, non‐tacky wax fraction. Two procedures investigated consisted of removal of the oil from the tank settlings by washing with acetone, destruction of the phosphatides through hydrolysis or saponification, and subsequent purification by fractionation from isopropanol solution; another involved hydration of the tank settlings, followed by separation of the aqueous and oil phases, and fractionation of the oil phase from isopropanol solution; and two procedures used simple fractionation of the tank settlings with the aid of solvents. Yield of the hard wax fractions from the typical sample of tank settlings varied from 8.3 to 13.7%, based on the weight of the original settlings. The iodine value varied from 11.1 to 17.6, the free fatty acid content from 2.1 to 7.3%, the phosphorus content from 0.01 to 0.15%. The lowest melting point observed was 75.3°C. and the highest was 79.9. The samples of hard wax were almost black in color when in the liquid state and could not be bleached readily with activated clay or carbon. The waxes were bleached readily by hydrogen peroxide and by chromium trioxide in the presence of sulfuric acid solution, or by combinations of these reagents. Practically white waxes could be produced with 0.5 part of 29% hydrogen peroxide and 1 part of chromium trioxide per 1 part of wax.