| 摘要 |
<p>The purification of a C5-C12 cycloalkanone e.g. cycloalkane, obtained by oxidation of the corresponding cycloalkane, is effected by subjecting the cycloalkanone to an aldol condensation whereby at least 80% of the aldehydes present are converted but not more than 20% of cycloalkyl esters derived from carboxylic acids containing at least 4 carbon atoms per molecule, is allowed to saponify. In effecting the aldol condensation an alkaline catalyst may be used, e.g. sodium hydroxide or sodium carbonate, or an acid catalyst may be used e.g. sulphuric acid or an acid in exchanger. After the aldol condensation has been effected the cycloalkanone may be separated by distillation.</p> |
