Basf Aktiengesellschaft

Basf Se Corporation

Helmuth Menig

Wilhelm Ruppel

Thomas Fetzer

Dirk Demuth

Peter Resch

Heinz Rutter

Harro Wache

Jochem Henkelmann

Wolfgang Siegel

Klaus Ebel

Hermann Luyken

Gerd Kaibel

Peter Bassler

Boris Breitscheidel

Peter Zehner

Martin Fischer

Klaus Harth

Thomas Ruhl

Wolfgang Reif

Karl Baer

Sabine Weiguny

Anton Negele

Ludwig Wambach

J&ouml;rg Therre

Gerhard Fritz

Volker Vogt

Günther Achhammer

Guenther Achhammer

Carsten Gr&ouml;ning

Thomas Wendrich

Volker Pratsch

Rainer Dietz

J&uuml;rgen Koopmann

The present invention relates to a process for preparing hydrocyanic acid (HCN) by catalytic dehydration of gaseous formamide in a reactor which has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to a reactor for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide, which reactor has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to the use of the reactor of the present invention in a process for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide.

Hydrocyanic acid consisting of formamide

Preparation of carbonyl compounds

In a process for the preparation of methylglyoxal dimethyl acetal from methylglyoxal and methanol in the presence of an acidic ion exchanger, water is introduced in an amount sufficient to form an acidic reaction mixture in which the acetal product and water form an azeotropic mixture, with or without the retention of some methanol reactant. After subjecting a single phase acidic reaction mixture to an azeotropic distillation, it will separate into two distinct liquid phases with a simple recovery of the acetal product from the aqueous phase.

Preparation of methylglyoxal dimethyl acetal

Method for producing carbonyl compounds

A process for the hydrogenation of an aromatic compound, in which at least one hydroxyl group is attached to an aromatic core, or an aromatic compound, in which at least one amino group is attached to an aromatic core, in the presence of a catalyst containing, as active metal, ruthenium and optionally one or more other Group IB, VIIB, or VIIIB metals, applied to a macroporous support.

Process for reacting an organic compound in the presence of a supported

Pyrroles are prepared by a process in which ammonia or an amine is reacted with a but-2-ene-1,4-diol in the presence of a supported catalyst containing copper, silver, zinc, palladium, nickel, cobalt and/or platinum and/or compounds of these metals as catalytic materials, and in the presence or absence of compounds of chromium and/or manganese as additional catalysts, in the gas phase. The pyrroles obtainable by the process of the invention are useful starting materials for the preparation of dyes, corrosion inhibitors, drugs and pesticides.

Preparation of pyrroles

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Friedelsheim, Germany

Helmuth Menig