Average grain diameter distributes the silica gel grain

摘要

PROBLEM TO BE SOLVED: To obtain spherical silica particle low in strength, large in specific surface area, free from collapse or crack on its surface and particularly most suitable as a catalyst carrier for olefin polymerization. ;SOLUTION: The spherical silica particle is an aggregate of a silica particle and has ≤39.2×exp(-0.03×d) MPa tensile strength measured about a particle having (d) μm particle diameter, 1-200 μm average article diameter and ≥400 m2/g specific surface area.;COPYRIGHT: (C)2001,JPO