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|Section2= |Section3= |Section4= |Section7= |Section8= }} Adipic acid is the organic compound with the formula (CH2)4(COOH)2. From an industrial perspective, it is the most important dicarboxylic acid: About 2.5 billion kilograms of this white crystalline powder are produced annually, mainly as a precursor for the production of nylon. Adipic acid otherwise rarely occurs in nature. ==Preparation and reactivity== Adipic acid is produced from a mixture of cyclohexanol and cyclohexanone called "KA oil", the abbreviation of ketone-alcohol oil. The KA oil is oxidized with nitric acid to give adipic acid, via a multistep pathway. Early in the reaction the cyclohexanol is converted to the ketone, releasing nitrous acid: :HOC6H11 + HNO3 → OC6H10 + HNO2 + H2O Among its many reactions, the cyclohexanone is nitrosated, setting the stage for the scission of the C-C bond: :HNO2 + HNO3 → NO+NO3− + H2O :OC6H10 + NO+ → OC6H9-2-NO + H+ Side products of the method include glutaric and succinic acids.〔 Related processes start from cyclohexanol, which is obtained from the hydrogenation of phenol.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Adipic acid」の詳細全文を読む スポンサード リンク
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