Process for improving color and color stability of oleic acid
AssigneeCognis Corporation
InventorsEdward L. Ewbank, David J. Anneken
Life of this patent
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Abstract
The invention is a method for improving the color and color stability of oleic acid by a two column distillation process in which the oleic acid to be color improved is introduced into a first distillation zone containing an enriching section and a stripping section providing a minor amount of a topping product and a major amount of underflow containing the oleic acid and passing the oleic acid to a bottom portion of a second distillation zone having an enriching section to recover the improved oleic acid with improved color and color stability as a top product from the second distillation zone.
Claims12
A process for improving the color and color stability of oleic acid which comprises introducing an oleic acid feed into a first distillation column at a point between an enriching section and a stripping section to separate a minor amount of a topping product and major amount of a column bottom product containing the oleic acid and introducing the bottom product into a lower portion of a second distillation column having an enriching section and removing a purified oleic acid as a top product and a residue fraction from the bottom of the column.
Dependencies are inferred from the claim text.