Cation Exchanged Silicate Catalyst for Ethylene Polymerization

[摘要] Several cation exchanged-layer silicate catalysts were prepared from acid clay mainly consisted of montmorillonite, and their catalytic activities for the ethylene polymerization were studied at room temperature. It was found that over Ni2+-Mont, dimerization of ethylene to n-butene proceeded selectively. Ni2+-Mont was activated by evacuation at elevated temperature, giving a maximum temperature, 150¡É. The variations in catalytic activities were closely correlated to the acidity of the catalysts. Cr3+-Mont exhibited a high activity for the polymerization, showing, a maximum at the evacuation temperature of 450¡É. The active site in Cr3+-Mont was considered to be Cr3+ ion.

[学科分类] 化学（综合）