Since peroxides can form spontaneously in some materials, some caution must be exercised with such " peroxide forming materials ", such as the common ethers diethyl ether, tetrahydrofuran or isosafrole oxidation in acetone ) to industrial production of phenol ( where the second product of the cumene process, acetone, is partially oxidized to peroxide on the second reaction step ).
32.
Further works on the modernisation and intensification of caprolactam, including e . g . the construction of caprolactam treatment unit by crystallisation, the construction based on the Swiss solutions for Luwa film distillation, the construction of the installation for obtaining cyclohexanone on the basis of cumene phenol-led to achieving the capability of 55 thousand tons per day in 1975.
