Method for purifying 11-cyano-undecanoic acid

Details Method for purifying 11-cyano-undecanoic acid Method for purifying 11-cyano-undecanoic acid

1975-01-23

1976-11-30

Garvin, Patrick P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604045, C07C10104, C11B 300

Patent

active

039949427

ABSTRACT:
11-cyano-undecanoic acid having a high purity of 99% or more is obtained by the steps of dissolving a crude 11-cyano-undecanoic acid in the form of free acid or its ammonium salt into a mixture solvent consisting of acetic acid or propionic acid and water in a mixing ratio by weight of 1 : 0.05 to 3; bringing a refining gas containing therein ozone into contact with said solution in order to decompose impurities, especially, coloring substances in said solution, and; crystallizing and separating the purified 11-cyano-undecanoic acid from said solution.

REFERENCES:
patent: 2862940 (1958-12-01), Otsuki et al.
patent: 3217027 (1965-11-01), Little

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