Process for obtaining fatty acids with improved odor, color...

Details Process for obtaining fatty acids with improved odor, color... Process for obtaining fatty acids with improved odor, color...

2005-03-31

2008-11-11

Manoharan, Virginia (Department: 1797)

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

C203S078000, C203S079000, C203S080000, C203S099000, C203SDIG019, C554S175000

Reexamination Certificate

active

07449088

ABSTRACT:
The present invention relates to a new process for obtaining fatty acids with improved color, odor and heat stability which is characterized in that:(a) in a first step the crude acids are fed to a rectification (“precut”) column in order to remove low boiling by-products being present in the starting material as a top fraction, and(b) in a second step the bottom fraction of the precut column is fed to a sidestream column in order to obtain the pure fatty acids as the side fraction, to remove low boiling by-products which have been formed in the course of the first distillation as a top fraction and to remove high boiling by-products, either being present from the starting material or formed during the first distillation, with the residue.

REFERENCES:
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patent: 2003/0116420 (2003-06-01), Kalbel et al.
patent: 195 31 806 (1997-04-01), None
patent: 1 321 175 (2003-06-01), None
patent: WO 96/40851 (1996-12-01), None

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