Studiengesellschaft Kohle Mbh

Helmut Bonnemann

Werner Brijoux

Rainer Brinkmann

Borislav Bogdanovic

Marc Samson

Thomas Joussen

Eckhard Dinjus

Hartmut Schenkluhn

Barbara Korall

Joachim Richter

Rainer Fretzen

Process for producing tenside-stabilized colloids of mono- and bimetals

Process for the preparation of highly active doped metal supported

The invention relates to a process for the preparation of finely divided microcrystalline-to-amorphous metal and/or alloy powders and of metals and/or alloys in the form of colloidal solutions in organic solvents, which is process is characterized in that in inert organic solvents metal salts individually or in admixture are reacted with alkaline metal or alkaline earth metal hydrides which are maintained in solution by means of organoboron or organogallium complexing agents, or with tetraalkylammonium triorganoborohydrate, respectively.

Microcrystalline-to-amorphous metal and/or alloy powders dissolved

The invention relates to a process for the preparation of finely divided microcrystalline-to-amorphous metal and/or alloy powders and of metals and/or alloys in the form of colloidal solutions in organic solvents, which is process is characterized in that in inert organic solvents metal salts individually or in admixture are reacted with alkaline metal or alkaline earth metal hydrides which are maintained in solution by means of organoboron or organogallium complexing agents, or with tetraalkylammonium triorgano-borohydrate, respectively.

Process for preparing microcrystalline-to-amorphous metal and/or alloy

Disclosed is a process for preparing acicular non-sintered iron metal pigments for magnetic signal recording, having a high storage density, high saturation magnetization and remanence, the coercive field strength of which at a given crystallite size of the starting material is low and is increased as desired by subsequent annealing. The preparation of said iron metal pigments is effected by reduction of iron oxide compounds with metal hydrides of metals of the Groups I or II of the Periodic Table of Elements in organic solvents, with the metal hydrides being solvatized with a carrier in the form of a carrier complex.

Acicular iron-magnet pigments having an adjustable coercive field

The invention relates to a process for preparing finely divided metal powders, which process is characterized in that metal salts are reacted with magnesium, to which a catalytic amount of anthracene and/or magnesium anthracene or of one of their derivatives has been added as an activator, in a solvent, and optionally in the presence of an inorganic support material.

Process for preparing finely divided metal powders

The preparation of pyridine and pyridine derivatives from alkynes and cyano compounds including HCN is disclosed. The process can be carried out in the presence of a cobalt or rhodium catalyst having at least one ligand with one or more boron atoms. Certain new cobalt or rhodium catalysts containing such ligand are also disclosed. Also disclosed is a process for the formation of 2-aminopyridine by contacting acetylene with cyanamide such as in the presence of a cobalt or rhodium catalyst which has at least one ligand with one or more boron atoms.

Method for manufacturing pyridine and pyridine derivatives from alkynes

The invention relates to a process for the production of complex compounds of the transition metals which is characterized in that transition metals are reacted with magnesium, to which a catalytic quantity of anthracene and/or magnesium anthracene has been added as activator, in the presence of complexing ligands.

Production of transition metal complexes

A process is described for the catalytic, selective preparation of 2-vinylpyridine from acetylene and acrylonitrile using a cyclopentadienylcobalt catalyst or .pi.-allylcobalt catalyst at elevated temperature in an inert solvent, wherein the acrylonitrile concentration is up to 2 mols/liter and the reaction is carried out at a temperature over 140.degree. C. and up to 180.degree. C., the reaction time being not more than 50 minutes.

Process for preparation of 2-vinylpyridine from acetylene and

In the production of pyridines by the reaction of alkynes and nitriles in the presence of a cobalt-containing catalyst, special catalysts have been found to give high yields. The catalyst can be a cobalt-(I) complex compound of the type cyclooctenyl-cobalt(I)-cyclooctadiene, methyl heptadienyl-cobalt(I)-butadiene and cyclopentadienyl-cobalt(I)-cyclooctadiene, or it can be formed in situ by reducing a di- or tri-valent cobalt salt with zinc, cadmium, a metal of the main groups I to III of the Periodic Table or with an organometallic compound of any of the foregoing.

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Essen, Germany

Helmut Bonnemann