C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 7/06 (2006.01) B01D 3/36 (2006.01) C07C 51/46 (2006.01) C07K 5/075 (2006.01)
Patent
CA 2075868
A?tRACT OF THE DISCLOSURE: The present invention disclose a method to separate each component from a mixed solution of organic solvents obtained during -the production of a-l.- aspartyl-L-phenylalanine methyl ester, which is useful as a sweetener, namely, amixed solution of acetic acid and toluene or a mixed solution of acetic acid, toluene and formic acid, recovering each component with a high recovery ratio with as small number of operations as possible. The method rationalizes the process and is highly valuable in practical use. When each component is separated and recovered from a mixed solution containing acetic acid and toluene as the main components, acetic acid and toluene are separated by azeotropic distillation using water as an azeotropic solvent, and. when each component is separated and recovered from a. mixed solition containing acetic acid, toluene and formic acid as the main components,(a) the mixed solution is distilled and formic acid is recovered from the top of the column and a mixed solution of acetic acid and toluene is recovered from the bottom of the column and (b) the mixed solution obtained from the bottom is distilled by using water as an azeotropic solvent and toluene is recovered from the top of the solumn and acetic acid is recovered from the bottom of the column.
Kataoka Takehiko
Kawasaki Haruo
Kishimoto Shinichi
Ohura Harutoshi
Uchida Yoshinobu
Ajinomoto Co. Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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