Air-cooled zone

Air-cooled zone modules do not have the ability to remove as much energy as do water-cooled units. For processes that only require a low level of cooling, air-cooled units will provide a more stable control of the temperature. Recent Innovations In air cooling using high-flow fan systems [12] have allowed the replacement of some water-cooled systems with less costly and lower maintenance air-cooled systems [11]. 

Preparation of Copolymer of Chloro- and Butyl- -xylylene. Mixtures of dichloro-di-p-xylylene and butyl-di-p-xylylene were prepared and melted to ensure homogeneity. The mixture was placed in the distillation zone, and the reaction was carried out in the usual fashion. The copolymers formed in the initial polymerization zone which was maintained at 90°-100°C. Poly-p-xylylene formed in the final, air-cooled zone. At... 

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