Studiengesellschaft Kohle Mbh

Studiengesellschaft

Borislav Bogdanovic

Manfred Schwickardi

Ursula Wilczok

Gunther Wilke

Horst Pauling

Helmut Bonnemann

Alfred E Ritter

Bernd Spliethoff

Method of synthesizing grignard compounds using catalysts

Method for the reversible storage of hydrogen

The present invention relates to metal-magnesium compounds, a process for preparing same and the use thereof, especially for the preparation of finely divided, possibly amorphous, metal and alloy powders and/or of intermetallic compounds, both procedures via a non-metallurgical route in organic solvents under mild conditions.

Metal-magnesium compounds

Metal-magnesium compounds, process for preparing same and the use

Intermetallic compounds and hydrides thereof, characterized in that they have been prepared by reacting hydrides of the elements of the main groups I, II, III and IV of the Periodic Table, magnesium hydridehalides or magnesium dialkyls having the general formula MgR.sub.2 (R=alkyl) in a solvent with bisallyl metal compounds of the metals of the subgroup VIII of the Periodic Table or of zinc or with the homologues of the bisallyl compounds of said metals, and processes for preparing said compounds.

Intermetallic compounds hydrides

Organic-solvent soluble magnesium hydrides or formulas ##STR1## are prepared by catalytically hydrogenating finely powdered magnesium, optionally in the presence of a magnesium halide, in an organic solvent in the presence of their MgH.sub.2 -free counterparts in which

Soluble magnesium hydrides, method of preparing them, and use thereof

Intermetallic compounds

A method of preparing an active magnesium-hydride or magnesium hydrogen-storer system which can reversibly take up H.sub.2, comprising contacting finely divided magnesium hydride or metallic magnesium with a solution of a metal complex or of a metal-organic compound of a transition metal of Subgroups IV-VIII of the periodic table, and then removing the solution. The product performs better with regard to speed and efficiency upon repeated hydrogenation and dehydrogenation, as in hydrogen storage and evolution.

Method of preparing active magnesium-hydride or magnesium

Organic-solvent soluble magnesium hydrides of the formulas

Intermetallic compounds and hydrides

Organic-solvent soluble magnesium hydrides of the formulas ##STR1## are prepared by catalytically hydrogenating finely powdered magnesium, optionally in the presence of a magnesium halide, in an organic solvent in the presence of their MgH.sub.2 -free counterparts in which

The reversible preparation of active magnesium hydride MgH.sub.2 by reaction of magnesium with molecular hydrogen at a pressure of from 1 to 2 bar and at a temperature of from 150.degree. C. to 250.degree. C. The improvement comprises producing the magnesium by thermally decomposing a magnesium-containing compound at a pressure from 10.sup.-6 to 1 bar and in the absence or presence of an organic aprotic solvent, the magnesium obtained by the decomposition being isolated as a highly reactive powder.

Process for preparing finely divided highly reactive magnesium and use

A process for the production of hydrides of magnesium, comprising reacting magnesium with hydrogen in the presence of magnesium.

Process for the production of magnesium hydrides

The present invention relates to [Mg.sub.2 X.sub.3 (Ether)y].sup.+ [AlH.sub.4 ].sup.- in which

Growing community of inventors

Mulheim/Ruhr, Germany

Borislav Bogdanovic