Crystalline modification of anhydrous magnesium chloride

Details Crystalline modification of anhydrous magnesium chloride Crystalline modification of anhydrous magnesium chloride

C - Chemistry, Metallurgy

08

F

252/109, 23/175

C08F 4/64 (2006.01) C01F 5/30 (2006.01) C01F 5/34 (2006.01) C08F 4/02 (2006.01)

Patent

CA 1093787

ABSTRACT OF THE DISCLOSURE The invention is concerned with a new crystalline .beta.-form of anhydrous magnesium chloride, having a stratified structure which is crystallized in the hexagonal system having a spatial group of P3-ml with % equal to l and the following constants of the elementary cell: a = b = 3.641 .ANG. and c = 5.927 .ANG., and showing a hexagonal packing of the chlorine atoms, characterized by a X-rays diffraction spectrum in which the reflection lines of maximum intensity appear at the following lattice distances: d = 5.90 .ANG. (instensity f), d = 2.77 .ANG. (intensity ff), d = 1.814 .ANG. (intensity f). This new crystalline modification of MgCl2 is useful as component of catalysts for the polymerization of olefins and remarkably increases the polymer yield without the need of having to be activated.

270442

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