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

页码：115 / 118

页数：4

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