Portal de Periódicos da CAPES

Precise laboratory fractional distillation of fatty acid esters

1945; Wiley; Volume: 22; Issue: 2 Linguagem: Inglês

10.1007/bf02637476

1558-9331

Frank A. Norris, David E. Terry,

Thermodynamic properties of mixtures

Important factors in the construction and operation of laboratory fractionating columns are discussed. These include column diameter and insulation, packing, pressure drop, effect of reflux and molecular weight on fractionating efficiency, reflux regulation, choice of operating pressure, constant pressure maintenance, and accurate measurement of pressure. Accurate boiling points in the 1–20 mm. range are reported for the first time for methyl esters of myristic, palmitic, stearic, oleic, and linoleic acids. Heats of vaporization are given. Two types of columns, representing two stages of development in column design, are compared with respect to fractionating efficiency, and experimental results are given for the distillation of 50–50 mixtures of palmitic and stearic, stearic and oleic, and oleic and linoleic methyl esters through a Podbielniak column.