Vickers-Zimmer

The radical process begins with the radical-transfer agents R and ROO" (R = CgHii). Cobalt acts as an electron-transfer catalyst and redox initiator in the process. In a one-electron step, the oxidation state of the metal varies between +2 and +3, and radicals are released from the cyclohexane hydroperoxide. Since the cobalt is also involved in a cyclic process, its function is purely catalytic, and thus only small amounts of catalyst are required. Other metals such as V, Cr, Mo, Mn can also be used. Industrial variants of the process have been developed by companies such as BASF, Bayer, DuPont, ICI, Inventa, Scientific Design, and Vickers-Zimmer [T9]. 

Vickers- Zimmer multitubular reactor with downward cocurrent operation evaporative cooling with inert solvents... 

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