高效结晶型DMC催化剂制备及其催化性能

journal6 ›› 2010, Vol. 31 ›› Issue (5): 89-92.

高效结晶型DMC催化剂制备及其催化性能

（吉首大学化学化工学院，湖南吉首 416000）

出版日期:2010-09-25 发布日期:2012-04-12
作者简介:陈上（1970-），男，湖南吉首人，吉首大学化学化工学院副教授，博士，主要从事功能高分子材料研究.
基金资助:
国家自然科学基金资助资助（20704034）；湖南省自然科学基金资助项目（07JJ6012）

Preparation of Highly Active Double Metal Cyanide Complexes with High Crystalinity and its Catalytic Performance

(College of Chemistry& Chemical Engineering,Jishou University,Jishou 416000,Hunan China)

Online:2010-09-25 Published:2012-04-12

摘要/Abstract

摘要：以ZnO,Zn(OH)₂,ZnCO₃,碱式ZnCO₃为前体，采用沉淀转化方法制备基于Zn₃[Co(CN)₆]₂的双金属氰化络合物催化剂，研究了前体制备方法对其催化环氧丙烷与CO₂共聚催化性能的影响.结果表明，以Zn(OH)₂为前体制备的催化剂催化活性有最高，达到4 400 g /g以上，约为传统的溶液沉淀法制备的催化剂催化效率的2倍.该前体的凝聚态结构对催化剂效率影响很大，以ZnCl₂和NaOH溶液制备得到的Zn₅(OH)₈Cl₂·H₂O相能高效转化为催化剂活性结构，得到高效结晶型催化剂.催化剂催化活性也与前体的粒径有关，前体粒径大于75 μm时，催化效率明显下降.

关键词： 六氰合钴酸锌, 氢氧化锌, 催化剂, 共聚

Abstract: Double metal cyanide complexes based on Zn₃[Co(CN)₆]₂were prepared by precipitate transformation from precursors such as ZnO,Zn(OH)₂,ZnCO₃,and basic ZnCO₃,and the effect of preparative method on the catalytic efficiency towards copolymerization of propylene oxide and CO₂ was investigated.The results show that DMC catalyst with Zn(OH)₂ as precursor exhibits highest catalytic efficiency of over 4 400 g/g,which is about double catalytic efficiency compared with complexes derived from solution precipitation method.The morphology of this precursor has significant impact on resulting catalytic efficiency,the phase Zn₅(OH)₈Cl₂·H₂O produced by precipitating reaction of ZnCl₂ and NaOH can be transferred effectively into active site of catalyst to afford highly active catalyst with high crystalinity.The study also shows that catalytic efficiency of final catalyst relates to average particle size of precursor,the catalytic efficiency decreases sharply while average particle size of precursor is great than 75 μm.

Key words: zinc hexacyanocobaltate, zinc hydroxide, catalyst, copolymerization

陈上, 吴元祥. 高效结晶型DMC催化剂制备及其催化性能[J]. journal6, 2010, 31(5): 89-92.

CHEN Shang, WU Yuan-Xiang. Preparation of Highly Active Double Metal Cyanide Complexes with High Crystalinity and its Catalytic Performance[J]. journal6, 2010, 31(5): 89-92.

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