Sud-Chemie Ag

Süd-Chemie IP Gmbh & Co Kg

Klaus Schurz

Reinhard Hahn

Stefan Dick

Hans Buckl

Werner Zschau

Uwe Flessner

Nikolaus Rennar

José Antonio Ortiz Niembro

Wolfgang Eisenschmid

Rainer Brandsch

Andreas Siedler

Zschau Werner

The invention relates to a process of processing an acid suspension containing at least one solid, wherein (a) the suspension containing at least one solid is mixed with an alkali metal silicate solution, the pH of the mixture being adjusted to a pH of more than 4, and (b) the resulting precipitate which contains the alkali metal silicate and the at least one solid is separated and optionally washed, dried and ground. The mixture according to (a) after aging may be acidified further by the addition of an acid. Furthermore, there are disclosed an adsorbent obtainable according to the preceding process, and the use thereof.

Semi-synthetic bleaching earth

A rubber compound is described containing as a reinforcing filler a layered silicate which is obtained by excessive leaching of a smectitic layered silicate with mineral acids. The rubber compound further contains at least one diene polymer or copolymer and a coupler containing groups reactive with the filler. There is also described a method for production of the rubber compound and molded articles produced from the rubber compound.

Rubber mixture that can be cross-linked by sulfur, method for the production thereof, and cross-linked rubber mixtures and shaped bodies that can be obtained therefrom

Disclosed is a process for the ecological usage of acid effluents. Also disclosed is a sorption agent which is characterized in that an acid effluent, created from the production of fullers earth which contains as main ingredients Fe.sup.2+/3+ -, Al.sup.3+ -, Ca.sup.2+ - and Mg.sup.2+ cations and inorganic anions, is reacted with an alkali silicate. The resultant precipitate is separated in an aqueous phase and, when necessary, purified and dried. The sorption agent can be used for the bleaching of oils or for the removal of soaps, phospholipids and heavy metals from oils, specifically edible oils.

Method for ecological utilization of acid effluents of fuller's earth

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Munich, Germany

Klaus Schurz