摘要:
The present invention relates to a process for preparing a 2-(1-hydroxyalkyl)cyclohexanone and/or a 2-alkylidene cyclohexanone. According to the present invention, the reaction of cyclohexanone with an aliphatic aldehyde is conducted in a heterogeneous system of an oil-in-water emulsion, whereby it is possible to obtain the 2-(1-hydroxyalkyl)cyclohexanone and/or the 2-alkylidene cyclohexanone in high selectivity.
摘要:
Methoxyanthraquinones are produced from the corresponding nitroanthraquinones by reacting a nitroanthraquinone with methanol and an alkali in a reaction medium chiefly comprising methanol at a temperature of 50.degree.-130.degree. C under atmospheric or superatmospheric pressure in the presence of molecular oxygen wherein the dissolved oxygen concentration of the reaction medium is maintained at a value of at least 1 ppm.