IT1031370B - Purificn of 11-cyano-undecanoic acid - by contacting crude acid with ozone
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Purificn of 11-cyano-undecanoic acid - by contacting crude acid with ozone
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IT1031370B
IT1031370BIT1984775AIT1984775AIT1031370BIT 1031370 BIT1031370 BIT 1031370BIT 1984775 AIT1984775 AIT 1984775AIT 1984775 AIT1984775 AIT 1984775AIT 1031370 BIT1031370 BIT 1031370B
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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Abstract
Crude 11-cyano-undecanoic acid (I), e.g. the crude prod. of thermal cracking of 1, 1'-peroxy-dicyclohexylamine at 300-1000 degrees C, can be purified and decolourised by contacting crude (I) as acid or ammonium salt in an organic solvent not reactive with O3 at 0-100 degrees C, pref. 1-3C aliphatic carboxylic acid or 1-2C halogenated hydrocarbon, with O3, pref. in amt. 0-05-5% by wt. of (I). Pref. the crude (I) is subjected to pref-purificn, e.g. by recrystallisation or contact with active C. Excellent purificn. is obtd. Prod., on hydrogenating, forms 12-NH2-dodecanoic acid which is may be polymerised to Nylon 12.
IT1984775A1974-02-051975-01-31Purificn of 11-cyano-undecanoic acid - by contacting crude acid with ozone
IT1031370B
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