Deoligomerization of cyclooligosiloxanes with dimethyl carbonate over solid-base catalysts

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

Research output: Contribution to journalArticle

21 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 languageEnglish
Pages (from-to)115-118
Number of pages4
JournalCatalysis Letters
Volume88
Issue number3-4
DOIs
Publication statusPublished - 2003 Jun 1
Externally publishedYes

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Keywords

  • Deoligomerization
  • Dimethyl carbonate
  • Polysiloxane
  • Recycling
  • Silicone

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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