Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts

Masaki Okamoto; Kuon Miyazaki; Akihiro Kado; Sumiko Suzuki; Eiichi Suzuki

doi:10.1023/A:1024093218443

Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts

Masaki Okamoto, Kuon Miyazaki, Akihiro Kado, Sumiko Suzuki, Eiichi Suzuki

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	115-118
Number of pages	4
Journal	Catalysis Letters
Volume	88
Issue number	3-4
DOIs	https://doi.org/10.1023/A:1024093218443
Publication status	Published - 2003 Jun
Externally published	Yes

Keywords

Deoligomerization
Dimethyl carbonate
Polysiloxane
Recycling
Silicone

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Access to Document

10.1023/A:1024093218443

Cite this

@article{c537e5596b5046dab60bbbdcda7d5797,

title = "Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts",

abstract = "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.",

keywords = "Deoligomerization, Dimethyl carbonate, Polysiloxane, Recycling, Silicone",

author = "Masaki Okamoto and Kuon Miyazaki and Akihiro Kado and Sumiko Suzuki and Eiichi Suzuki",

note = "Funding Information: This research was financially supported by the Mizuho Foundation for the Promotion of Science.",

year = "2003",

month = jun,

doi = "10.1023/A:1024093218443",

language = "English",

volume = "88",

pages = "115--118",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Springer Netherlands",

number = "3-4",

}

TY - JOUR

T1 - Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts

AU - Okamoto, Masaki

AU - Miyazaki, Kuon

AU - Kado, Akihiro

AU - Suzuki, Sumiko

AU - Suzuki, Eiichi

N1 - Funding Information: This research was financially supported by the Mizuho Foundation for the Promotion of Science.

PY - 2003/6

Y1 - 2003/6

N2 - 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.

AB - 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.

KW - Deoligomerization

KW - Dimethyl carbonate

KW - Polysiloxane

KW - Recycling

KW - Silicone

UR - http://www.scopus.com/inward/record.url?scp=0043269699&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0043269699&partnerID=8YFLogxK

U2 - 10.1023/A:1024093218443

DO - 10.1023/A:1024093218443

M3 - Article

AN - SCOPUS:0043269699

SN - 1011-372X

VL - 88

SP - 115

EP - 118

JO - Catalysis Letters

JF - Catalysis Letters

IS - 3-4

ER -

Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this