Process for the production of magnesium hydrides

• US 4,554,153 A
• Filed: 07/02/1984
• Issued: 11/19/1985
• Est. Priority Date: 02/02/1978
• Status: Expired due to Fees

• Current Assignee: Studiengesellschaft Kohle MBH
• Original Assignee: Studiengesellschaft Kohle MBH
• Inventors: Bogdanovic, Borislav
• Primary Examiner(s): Carter, H. T.
• Application Number:
  US06/626,819
• Time in Patent Office: 505 Days
• Field of Search: 423/647, 420/900
• US Class Current: 423/647
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01B 6/04 Hydrides of alkali metals, alkaline earth metals, beryllium or magnesium; Addition complexes thereof
• CPC Class Codes: Y10S 420/90 Hydrogen storage

Abstract

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

Claims

1. A process for the production of magnesium hydride which comprises reacting magnesium with hydrogen in an organic solvent in the presence of anthracene and a halide of a transition metal of the IVth to VIIIth sub group of the periodic system.

2. A process according to claim 1, wherein the reaction is carried out under a pressure from about 1 to 300 bar.

3. A process according to claim 1, wherein the transition metal halide is a halide of titanium, iron and/or chromium.

4. A process according to claim 1, wherein the solvent comprises tetrahydrofuran, toluene, 1,2-dimethoxyethane, or mixtures thereof.

5. A process according to claim 1, wherein a magnesium halide is added to the solvent and is present during the reaction with hydrogen.

6. A process according to claim 1, including the further steps of dehydrogenating the resulting magnesium hydride at elevated temperature thereby to produce activated magnesium, and contacting the activated magnesium with a hydrogen-containing gas to re-form magnesium hydride.

7. A process according to claim 6, wherein the hydrogen is employed as a gaseous mixture with at least one other gas which is inert under the prevailing conditions.

8. A process according to claim 6, wherein the hydrogen is employed as a gaseous mixture with at least one member selected from the group consisting of nitrogen, methane, carbon monoxide and ammonia.

9. A process according to claim 1, wherein the solvent comprises tetrahydrofuran, the reaction is carried out a pressure of at most 140 bar and a temperature of about 20°

to 80°

C., and the ratio of each transition metal halide and of anthracene to magnesium 1;

10 to 1;

10⁴.