Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts

被引：24
|
作者：
Okamoto, M
Miyazaki, K
Kado, A
Suzuki, S
Suzuki, E [1 ]
机构：
[1] Tokyo Inst Technol, Dept Appl Chem, Meguro Ku, Tokyo 1528552, Japan
[2] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1528550, Japan
来源：
CATALYSIS LETTERS | 2003年 / 88卷 / 3-4期
关键词：
silicone; polysiloxane; recycling; dimethyl carbonate; deoligomerization;
D O I：
10.1023/A:1024093218443
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cyclooligosiloxanes, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane were efficiently deoligomerized with dimethyl carbonate using an alumina-supported potassium fluoride catalyst under a continuous vapor-phase flow condition to form dimethoxydimethylsilane monomer. In the deoligomerization of larger cyclooligosiloxanes, the catalyst was deactivated. The addition of a small amount of methanol suppressed the deactivation. These results strongly suggest a new method for recycling silicone via monomers.
引用
收藏
页码：115 / 118
页数：4
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