| 摘要 |
1,189,411. Cycloaliphatic oximes. ASAHI KASEI KOGYO K.K. 19 Jan., 1968 [25 Jan., 1967], No. 3076/68. Heading C2C. A process for the continuous preparation of cycloaliphatic oximes comprises adding to a cycloalkane an aqueous solution of nitrosylsulphuric acid and sulphuric acid containing 70 to 10% by weight of nitrosylsulphuric acid, based on nitrosylsulphuric acid plus sulphuric acid, and 2 to 25% by weight of water, based on nitrosylsulphuric acid plus sulphuric acid plus water, together with hydrogen chloride, stirring the mixture to form a homogeneous emulsion and subjecting the emulsion to photochemical reaction in the presence of 300-600 mÁ radiation, at a temperature of from 0‹ to 50‹ C. The hydrogen chloride may be used either in the gaseous form or in solution and is preferably present in sufficient amount to saturate the cycloalkane. The process is suitable for the C 5 -C 12 cycloalkanes, particularly cyclohexane. The production of the oximes from cyclohexane, cyclooctane and cyclododecane is exemplified.
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