Graphite-based double-walled reaction vessel for - continuous (physical) chemical processes, with high

Heating or cooling media are brought to pressure by passage through circular segments, then passed through a double-wall fitted to a graphite reaction vessel. The reaction column is divided by fixed or loose installations e.g. perforated trays, bubble-plates, etc., of the required size, so that remixing is prevented, and optimum conditions are attained. Photochemical reactns. may be induced by rays of UV light passed through opening in the column wall e.g. of quartz, and when suitable measuring and regulating instruments are switched on the reactn. may proceed continuously. In an example, the apparatus has been used in the preparation of the insecticide "Melipax" by UV-induced reactn. between camphene and Cl2.