OBTAINING CYCLOPENTANONE FROM ACIDIC WASTEWATER OF CAPROLACTAM PRODUCTION

Abstract

The process of oxidation of cyclohexane with atmospheric oxygen, carried out as a separate stage in the production of caprolactam, is characterized by a large amount of oxygen-containing compounds, which are concentrated in acidic wastewater. One of these compounds is adipic acid. The resulting calcium salt of adipic acid decomposes during high-temperature processing to cyclopentanone. Cyclopentanone is an important intermediate in the production of insecticides, biologically active pharmaceuticals. Ketocyclopentane is an intermediate in the synthesis of jasmon. In the pharmaceutical industry it is a precursor in the production of cyclopentobarbital, which is a sedative. Cyclopentanone is also used to produce cyclopentamine, which is an intermediate in the synthesis of fungicides such as pencycuron. The solid concentrate of acidic wastewater was diazomethylated to obtain methyl esters of carboxylic acids.