Fatty acid distillation—Comparison of two column types

Autor: Williams, F. C., Osburn, J. O.
Zdroj: Journal of the American Oil Chemists' Society; November 1949, Vol. 26 Issue: 11 p663-668, 6p
Abstrakt: Vapor-liquid equilibrium data are presented for the systems lauric acid-myristic acid, myristic acid-palmitic acid, and palmitic acid-stearic acid at four mm. pressure. Deviations from Raoult's law are observed.The performance of a small glass column packed with fibrous glass was studied. The H.E.T.P. was 30 to 35 inches and showed no consistent variation with composition. Above a vapor velocity of about seven feet per second, the H.E.T.P. increased.The performance of a small bubble-cap column was studied. The overall plate efficiency was about 35%. The allowable vapor velocity was between four and five feet per second.For the distillation of fatty acids at four mm. of Hg pressure the bubble-cap column was more satisfactory than the packed column containing fibrous glass since the pressure drop per theoretical plate was about one-fifth as great at comparable capacities. The comparison should be even more favorable to the bubble-cap column with larger sizes. Vapor-liquid equilibrium data are presented for the systems lauric acid-myristic acid, myristic acid-palmitic acid, and palmitic acid-stearic acid at four mm. pressure. Deviations from Raoult's law are observed. The performance of a small glass column packed with fibrous glass was studied. The H.E.T.P. was 30 to 35 inches and showed no consistent variation with composition. Above a vapor velocity of about seven feet per second, the H.E.T.P. increased. The performance of a small bubble-cap column was studied. The overall plate efficiency was about 35%. The allowable vapor velocity was between four and five feet per second. For the distillation of fatty acids at four mm. of Hg pressure the bubble-cap column was more satisfactory than the packed column containing fibrous glass since the pressure drop per theoretical plate was about one-fifth as great at comparable capacities. The comparison should be even more favorable to the bubble-cap column with larger sizes.
Databáze: Supplemental Index
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