Preferential oligomerization of isobutene in a mixture of isobutene and 1-butene over sodium-modified 12-tungstosilicic acid supported on silica

Zhang, Jin; Kanno, Mitsuru; Zhang, Jiao; Ohnishi, Ryuichiro; Toriyabe, Kakeru; Matsuhashi, Hiromi; Kamiya, Yuichi

Preferential oligomerization of isobutene in a mixture of isobutene and 1-butene over sodium-modified 12-tungstosilicic acid supported on silica

Zhang, Jin; Kanno, Mitsuru; Zhang, Jiao et al.

Journal of Molecular Catalysis A : Chemical, 2010, 326(1-2), 107-112

Permalink : https://hdl.handle.net/2115/43649

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アクセス権	open access
URI	https://hdl.handle.net/2115/43649
タイトル	Preferential oligomerization of isobutene in a mixture of isobutene and 1-butene over sodium-modified 12-tungstosilicic acid supported on silica
著者	Zhang, Jin ; Kanno, Mitsuru ; Zhang, Jiao ; Ohnishi, Ryuichiro ; Toriyabe, Kakeru ; Matsuhashi, Hiromi ; Kamiya, Yuichi
著者名 Zhang, Jin
著者名 Kanno, Mitsuru
著者名 Zhang, Jiao
著者名 Ohnishi, Ryuichiro
著者名 Toriyabe, Kakeru
著者名 Matsuhashi, Hiromi
e-Rad_Researcher 10374638 著者名 Kamiya, Yuichi
言語	英語
キーワード	Supported heteropolyacid
	Modification with alkali metal cations
	Isobutene oligomerization
	Surface acidity
	Temperature-programmed desorption
発行日	2010-07-01
出版者	Elsevier B.V.
収録物名	Journal of Molecular Catalysis A : Chemical
巻(号)	326(1-2)
ページ	107-112
抄録	Modification of 15 wt% H4SiW12O40/SiO2 with Na+ ions was investigated. Na-modified H4SiW12O40/SiO2 showed higher selectivity for isobutene oligomerization in the preferential oligomerization of isobutene in an equimolar mixture of isobutene and 1-butene than the unmodified one and the selectivity increased with an increase in the Na+ ion content. The highest selectivity (～97%) was achieved by using Na3HSiW12O40/SiO2. The activity decreased with an increase in the Na+ ion content. Unmodified H4SiW12O40/SiO2 had two kinds of acid sites with different acid strengths (medium and strong acid sites) on the outermost surface as revealed by temperature-programmed desorption of benzonitrile. However, the strong acid sites were eliminated by modification with alkaline metal cations: for example, Na3HSiW12O40/SiO2 had a negligible amount of strong acid sites. Thus, we concluded that the absence of strong acid sites on the outermost surface is the reason for the high selectivity. Li3HSiW12O40/SiO2 and K3HSiW12O40/SiO2 also exhibited high selectivity for isobutene oligomerization with activities comparable to that of Na3HSiW12O40/SiO2.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	1381-1169
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.molcata.2010.04.017