Basf Aktiengesellschaft

Michael Sander

Ulrich Penzel

Hans Volkmar Schwarz

Eckhard Str&ouml;fer

Markus Maurer

Ekkehard Schwab

Peter Zehner

Michael Henningsen

Dominic Vanoppen

J&ouml;rg Therre

Gunter Georgi

Rainer Noack

Ralf B&ouml;hling

Rene Leuthold

Dieter St&uuml;tzer

J&ouml;rn M&uuml;ller

Burghard Hantel

Klaus Werner

Dietmar Peisker

Holger Braunsberg

Siegfried Richter

The present invention relates to a process for the preparation of 1,2,4-triazol-1-ylmethyloxiranes of the formula I in which A and B are identical or different and, independently of one another, are C-C-alkyl, phenyl-C-C-alkyl, C-C-cycloalkyl, C-C-cycloalkenyl, tetrahydropyranyl, tetrahydrofuranyl, dioxanyl or phenyl, where the phenyl radical can carry one to three substituents chosen from the group: halogen, nitro, C-C-alkyl, C-C-alkyloxy, phenoxy, amino, C-C-haloalkyl or phenylsulfonyl, which comprises reacting  

Preparation for the production of 1,2,4-triazolylmethyl-oxiranes

A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.

Work-up of distillation residues from the synthesis of toluene diisocyanate

The invention relates to a process for the preparation of amines by hydrogenation of nitro compounds, which comprises carrying out the hydrogenation in a vertical reactor whose length is greater than its diameter, having a downward-facing jet nozzle arranged in the upper region of the reactor through which the starting materials and the reaction mixture are fed in, and having an outlet at any desired point of the reactor, through which the reaction mixture is fed back to the jet nozzle in an external circuit by means of a conveying means, and having flow reversal in the lower region of the reactor.

Method for producing amines

In a process for preparing amines, in which at least one compound containing at least one nitro group is reacted with hydrogen in the presence of a supported catalyst comprising, as catalytically active metal, nickel, if desired together with at least one metal of transition group I, V, VI and/or VIII, the reduced and stabilized supported catalyst comprises nickel crystallites having a bimodal nickel crystallite size distribution having maxima at 30-80 Angstrom and 81-150 Angstrom on a support comprising ZrO.sub.2, ZrO.sub.2 --HfO.sub.2 and/or SiO.sub.2 --ZrO.sub.2 and/or SiO.sub.2 --ZrO.sub.2 --HfO.sub.2 and in the reduced and passivated state has a nickel content of 60-80 percent by mass, an SiO.sub.2 content of 0-20 percent by mass, a ZrO.sub.2 content of 0-40 percent by mass, an HfO.sub.2 content of 0-4 percent by mass and after further reduction for one hour at 100.degree. C. has a degree of reduction of at least 70%.

Preparation of amines

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Ruhland, Germany

Michael Sander