Henkel Kgaa

Henkel Kommanditgesellschaft Auf Aktien

Friedrich W Diekotter

Peter Christophliemk

Rudolf Novotny

Gunther Just

Siegfried Staller

Jurgen Von Laufenberg

Willi Wust

Heinz-Gerd Smolka

Edgar Honges

A process for hydrothermally disintegrating wastes or residues having a high content of calcined aluminum oxides by reacting said wastes or residues with an aqueous sodium hydroxide solution having a concentration of sodium hydroxide of from about 20 to about 50% by weight at a temperature in the range of from about 180.degree. to about 250.degree. C. under a saturated steam pressure corresponding to said temperature. The sodium aluminate solution obtained is separated off and optionally filtered.

Hydrothermal disintegration of calcined aluminum oxide wastes

In the treatment of a zeolite suspension to separate solids from the mother and/or washing liquor, a vibrator is used in the suction drying zone of a vacuum filter in order to partially liquefy the filter cake material through the introduction of shear forces into the solidified filter cake, so that further separation of the pure liquid phase can take place in the suction drying zone of the vacuum filter.

Process for dewatering zeolite suspensions

A process for filtering alkaline solutions wherein calcined .alpha.-alumina is used as a filter aid.

Calcined .alpha.-alumina filter aids

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Langenfeld, Germany

Friedrich W Diekotter