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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 26, Number 5
JKCSEZ 26(5)
October 20, 1982

Title	Cation Exchanged Silicate Catalyst for Ethylene Polymerization 에틸렌 중합을 위한 양이온이 교환된 규산염 촉매
Author	Jong Rack Sohn, Hyen Bae Park 손종락, 박현배
Keywords
Abstract	Montmorillonite가 주성분인 산성백토로부터 여러 양이온을 교환시켜 촉매를 제조하여 ethylene의 중합활성에 대하여 연구하였다. Ni2+-Mont촉매상에서는 ethylene이 선택적으로 n-butene으로 이량화 되었으며, 그 활성은 150℃의 진공온도에서 최고로 나타났다. 그리고 촉매활성의 변화는 촉매의 산도와 밀접한 관계가 있었다. Cr3+-Mont 촉매는 ethylene의 중합에 높은 활성을 나타내었으며, 그 활성은 450℃의 진공온도에서 최고로 나타났다. 그리고 Cr3+-Mont의 활성점은 Cr3+이온으로 생각되었다. 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℃. 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℃. The active site in Cr3+-Mont was considered to be Cr3+ ion.
Page	282 - 290
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