| 摘要 |
Disclosed herein is a method for preparing amino-, imino-, and nitrilocarboxylic acids, and their alkali metal salts, starting from alkanolamines. The method employs oxidative dehydrogenation of the alkanolamine(s) in an alkali metal hydroxide medium, using a copper catalyst containing silver. The subject amino-, imino-, and nitrilocarboxylic acids have the following formula: R1R2R3 N where R3 is an alkyl group having 1-10 C atoms substituted with a carboxyl group (-COOH), R1 and R2, which may be the same or different, represent hydrogen, an alkyl group having 1-10 C atoms, an alkyl group having 1-10 C atoms substituted with a carboxyl group, a cycloalkyl group having 3-6 C atoms substituted with a carboxyl group, a cycloalkyl-alkyl group having 3-6 C atoms in the cycloalkyl moiety and 1-10 C atoms in the alkyl moiety and substituted with a carboxyl group, or an alkyl-cycloalkyl group having 1-10 C atoms in the alkyl moiety and 3-6 C atoms in the cycloalkyl moiety and substituted with a carboxyl group; wherein said alkyl groups may be linear or branched.
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