Process for preparing finely divided highly reactive magnesium a

Details Process for preparing finely divided highly reactive magnesium a Process for preparing finely divided highly reactive magnesium a

1984-11-07

1987-04-21

Stallard, Wayland

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05B, B22F 900

Patent

active

046593730

ABSTRACT:
The present invention relates to a process for preparing a finely divided, highly reactive magnesium from magnesium hydride, magnesium anthracene and/or its derivatives or magnesium butadiene and/or its alkyl or phenyl derivatives, which process is characterized in that the respective magnesium-containing compound is thermally decomposed at a pressure from 10.sup.-6 to 1 bar, the decomposition being carried out in the presence of a co-reactant of a consecutive reaction, or such co-reactant being added only after completion of the precipitation of the magnesium, or in the absence of such co-reactant, the magnesium obtained by said decomposition being isolated as a powder, and to the use of the finely divided, highly reactive magnesium for inserting magnesium into poorly reactive C-X bonds, wherein X denotes heteroatoms such as halogen, oxygen, sulfur, nitrogen, phosphorus, and the resulting organomagnesium compound may be used in a consecutive reaction according to a per se known method, and for the reversible preparation of active magnesium hydride by reaction 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.

REFERENCES:
patent: 3193375 (1965-07-01), Marx et al.
patent: 3247297 (1966-04-01), Salesse et al.
patent: 3969104 (1967-07-01), Barannik et al.
patent: 4541867 (1985-09-01), Neelameggham et al.
patent: 4543122 (1985-09-01), Bodenstein et al.

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