Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Klaus-Peter Muller

Gerd Schreyer

Heinz Friedrich

Helmut Beschke

Edgar Koberstein

Theodor Lussling

Ferdinand Theissen

Nicotinamide is prepared from nicotinonitrile by hydrolysis at 120.degree. to 200.degree. C. employing alkali hydroxide.

Process for the production of nicotinamide

Methionine and potassium are recovered from the recycling solution of the potassium carbonate-methionine process by concentrating the mother liquor after the methionine precipitation and with cooling carbonating the mother liquor.

Process for the recovery of methionine and potassium bicarbonate

Nicotinamide is recovered from the reaction mixture resulting from the hydrolysis of nicotinonitrile at elevated temperature by converting the nicotinamide into a melt while removing the solvent.

Process for the recovery of nicotinamide

Catalysts suitable for the oxidation of ammonia to nitrogen oxides which are suitable to produce nitric acid are prepared by doping cobalt oxide, preferably Co.sub.3 O.sub.4 with 0.1-10 atoms %, preferably 0.5-3 atom % of lithium. In a given case, there is added a mold assist agent to form tablets, spheres, extruded pressed strands or honeycombs. The product is calcined in air or an oxygen stream at 300.degree.-700.degree.C, preferably 400.degree.-600.degree.C and subsequently tempered at 700.degree.-900.degree.C in a reactive gas mixture of air and 8-10 vol. % ammonia to increase the form stability.

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Bergheim, Germany

Klaus-Peter Muller