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Countercurrent and counter double current distribution of 2‐methoxyethyl and 2‐chloroethyl fatty esters
Author(s) -
Butterfield R. O.
Publication year - 1969
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/bf02545013
Subject(s) - chemistry , partition coefficient , double bond , transesterification , organic chemistry , countercurrent distribution , methyl oleate , solvent , acetonitrile , fatty acid , linolenate , linseed oil , partition (number theory) , catalysis , chromatography , mathematics , combinatorics
2‐Methyoxyethyl esters of linseed and safflower oils were made by a base‐catalyzed transesterification and 2‐chloroethyl esters by acid‐catalyzed esterification of the free acids. Both esters were distilled in vacuum. Countercurrent distribution (CCD) of the two linseed esters with a hexane‐acetonitrile solvent system indicated that partition coefficients for the individual esters are one half those of the corresponding methyl esters. These lower partition coefficients permit solvent ratios nearer to one to be used in both CCD and counter double current distribution (CDCD) and they also reduce loading and transferring errors. Selectivity of the system toward number of double bonds and carbon chain length is the same as when methyl esters are used. Conditions were determined for the CDCD preparations of 2‐methoxyethyl and 2‐chloroethyl linolenate and linoleate from linseed and safflower oils, respectively.