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A comparison of several methods for the separation of unsaponifiable material from carnauba and sorghum grain waxes
Author(s) -
Bunger William B.,
Kummerow Fred A.
Publication year - 1951
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/bf02612208
Subject(s) - unsaponifiable , carnauba wax , wax , saponification , saponification value , sorghum , chemistry , iodine value , organic chemistry , chromatography , agronomy , biology
Summary The characteristics of carnauba and four varieties of sorghum grain waxes were compared. The results indicated that sorghum grain wax had higher acetyl, acid, and iodine numbers and a lower saponification number than carnauba wax. Sorghum grain wax also contained a lower percentage of esters and nonsaponifiable material than carnauba wax, and a hydrocarbon fraction which was absent in the latter. Of four methods tested for the quantitative separation of saponifiable and unsaponifiable components, the best separation was obtained by an extraction of the calcium soaps with di‐isopropyl ether.