Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Rudolf Schleicher

Hermann Winter

Alfred Lautsch

Jurgen Walther

Peter Rauth

Karl-Heinz Schoenberg

Karl-Heinz Schonberg

Juergen Walther

The necessity of opening a large polymerization reactor, in order to introduce a polymerization catalyst between charges in the batch suspension of polymerization of vinyl chloride on a commercial scale, is eliminated, thereby avoiding vinyl chloride emissions into the atmosphere, by isolating a segment of a charging conduit for a polymerization reactor containing vinyl chloride under pressure proximate the reactor; partially filling the isolated segment with water; charging the isolated segment above the water therein with a water-insoluble polymerization catalyst; and displacing into the reactor from the catalyst-charged segment first the water therein and then the catalyst therein with vinyl chloride under pressure.

Avoidance of vinyl chloride emissions in batch suspension polymerizations

A method for removing at least a portion of dissolved gases from a liquid dispersion utilizing a closed, cylindrical tower with an inlet in its upper portion, a tank at the bottom of the tower for collecting liquids, a central pipe in the tower open at each end, the upper end extending above the inlet and the lower end terminating above the level of the collected liquids in the tank and a plurality of inclined surfaces mounted around the central pipe and providing a flow path for the dispersion, each of the plurality of inclined surfaces being shaped and positioned to reverse the direction of flow and dimensioned to form an annular gap between the inclined surfaces and the wall of the tower, the inclined surfaces forming an angle of about 45.degree. to 80.degree. with the central pipe.

Process for the removal of gaseous monomers from polyvinyl

Growing community of inventors

Munich, Georgia

Rudolf Schleicher