Dynamit Nobel Aktiengesellschaft

Huls Troisdorf Aktiengesellschaft

Hans-Werner Engels

Paul Spielau

Gunter Zoche

Karl H Neuschaeffer

Karlheinz Neuschaffer

Guenter Zoche

Gunther Schmidt

Karl-Heinz Neuschaffer

Hans-Jurgen Gebert

Robert W Laube

Peter Randel

Karlheinz Neuschaeffer

Bernd Geick

Furnace with in situ foamed insulation and process for its manufacture

An inorganic, aqueous molding composition is described which can be hardened at low temperatures into molded parts having a high flexural stress at break. The molding composition is produced from electrostatic precipitator ash of high-temperature coal-burning power plants, this ash containing 45-55% by weight of vitreous SiO.sub.2 in addition to Al.sub.2 O.sub.3, or from calcined bauxite by reaction with an alkaline alkali silicate solution at a low temperature; fillers being optionally present.

Inorganic molding composition containing a lithogenous component

An exhaust gas catalyst support having hollow channels lined with .gamma.-Al.sub.2 O.sub.3 is formed by preparing an inorganic molding composition which actively hardens at 60.degree.-120.degree. C.; the molding composition containing an alkali silicate solution and a solid component reactive with the alkali silicate solution, which component can consist of an oxide mixture with contents of amorphous SiO.sub.2 and aluminum oxide and/or electrostatic precipitator ash from high-temperature coal-burning power plants and/or calcined ground bauxite and/or metakaolin; the hollow channels contained within the exhaust gas catalyst support are formed by reaction of aluminum rods or wires in the alkali silicate solution, with the simultaneous precipitation of alumina hydrate. In a subsequent heating step, the .gamma.-aluminum oxide lining is formed from the alumina hydrate, the lining serving for anchoring and fixation of a catalyst metal within the catalyst support.

Exhaust gas catalyst support of inorganic molding compositions and

Facings for use as building components with a solid molded part constituting the visible side and a foam member of an inorganic and/or organic foam can be produced by shaping and heat curing from inorganic, aqueous molding compositions, wherein the molding composition contains a reactive oxide mixture, an alkali silicate solution, optionally alkali hydroxide, and fillers and auxiliary agents.

Facings of inorganic molding compositions for building components

Molded parts having high flexural strength, based on alkali silicates, can be produced by casting and/or press-molding and curing by heating from aqueous molding compositions which are prepared from an oxide mixture containing amorphous silicic acid and aluminum oxide, as well as, optionally, as an additional component, aqueous, amorphous, disperse-powdery silicic acid, dissolved SiO.sub.2, and alkali from alkali silicate solutions, optionally alkali hydroxide or its aqueous solutions and, if desired, fillers, by means of mixing under agitation. By addition of a blowing agent inorganic foamed products can be obtained.

Aqueous curable molding compositions based on inorganic ingredients and

A support or base for low-vibration mounting of machines or the like is made by hardening a molding material in a mold. The base contains a hardened inorganic material with a density of 2.2 to 3.0, particularly 2.5 to 2.7 g/cm.sup.3, is made from

Machine base and process for manufacture thereof

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Troisdorf, Germany

Hans-Werner Engels