Hoechst Aktiengesellschaft

Manfred Scholz

Karl Kaiser

Lothar Strie

Horst Semmler

Karl-Heinz Stendenbach

An apparatus for drying moist chlorinated polymers, which are separated from an aqueous suspension, comprises a centrifugal nozzle structure which has a discharge outlet associated with it and a fluidized bed drier provided with a closable discharge outlet. The discharge outlet of the centrifugal nozzle structure opens into the upper portion of the fluidized bed drier.

Apparatus for drying chlorinated polymers

Moist chlorinated polymers, which are separated from an aqueous suspension, are dried. To this end the moist polymers are pre-dried in a centrifugation zone and the pre-dried polymers are completely dried in a fluidization zone which is arranged downstream of the centrifugation zone and in which a bed of fluidized material is continually maintained. The apparatus used for carrying out the drying process comprises a centrifugal nozzle structure which has a discharge outlet associated with it and a fluidized bed drier provided with a closable discharge outlet. The discharge outlet of the centrifugal nozzle structure opens into the upper portion of the fluidized bed drier.

Process and apparatus for drying chlorinated polymers

Defective coated workpieces are repaired. To this end a coated plate is placed on to the defective area so as to cover and overlap the defective area. A seal is disposed between the defective area and the plate and the latter is secured by means of bolts or screws extending through the workpiece from the uncoated side and extending into the plate.

Method of repairing a defective coated workpiece

Defective sites in the interior enamel coating of an enameled container are repaired. To this end, a bore is provided in the defective site; a sleeve is inserted in the bore; a screw bolt with two threaded ends is passed through the sleeve; a seal is slipped over the threaded end portion of the screw bolt which reaches into the container; a cap nut is tightened thereonto; a cup spring and lock nut are slipped over the threaded end portion of the screw bolt which extends outwardly from the container; and the cup spring and lock nut are tightened by means of a cap nut.

Method of repairing coated workpieces

Chlorinated polymers obtained by a filter-separation procedure, in a moist form, especially a water-containing moist form, are dried. To this end, the moist polymer is predried in a first fluidized-bed drying zone, this being continuously operated, and is thereafter further dried in one or more further fluidized-bed drying zones disposed downstream, of the said first drying zone.

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Hurth, Germany

Manfred Scholz