Patent ID: 7871951

Claim:
A method of producing a magnesium compound represented by formula (I): Mg(OEt)2-n(OMe)n (I) where Et is an ethyl group, Me is a methyl group and n is a numerical value of from 0.001 to 1, comprising simultaneously reacting metal magnesium, ethanol, methanol and a halogen and/or a halogen-containing compound comprising at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium, wherein the magnesium compound has an average particle diameter D50 of from 4 to 20 μm and a particle size distribution index (P) represented by the formula (1) of P<4.0 P=(D90/D10) (1) where D90 is a particle diameter corresponding to 90% of cumulative weight fraction, and D10 is a particle diameter corresponding to 10% of cumulative weight fraction.