GRANULE BASED ON PYROLYTICALLY-PREPARED SILICON DIOXIDE, METHOD FOR PRODUCING THE SAME, AND USE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide spray granules from pyrolytically-prepared silicon dioxide, which is usable in production of polyethylene as a catalyst carrier.

SOLUTION: This granule based on pyrolytically-prepared silicon dioxide has following physicochemical properties. Average grain size: 10-120 μm; BET surface area: 40 to 400 m2/g; pore volume: 0.5-2.5 ml/g; pore distribution: <5% of the total pore volume exists as pores with a diameter of <5 nm. and the rest exists as meso-pores and macro-pores: pH value; 3.6-8.5; and tapped density: 220-700 g/l.

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