Fluidised bed polymn using cooling liq. injection - with non return valve on nozzles to prevent back flow of powder clogging feed pipes

摘要

A method of injecting a liq into the interior of a fluidised bed consists of using nozzles fitted with non-return flap valves over their outlets. The pref application is for polysn of ethylenically unsatd monomers in a fluised bed, where injection and evapn. of a liq within the bed is used to regulate the temp.