Synthesis of (VO)₂P₂O₇ catalysts via exfoliation-reduction of VOPO₄ · 2H₂O in butanol in the presence of ethanol

Authors: Imai, Hiroyuki; Kamiya, Yuichi; Okuhara, Toshio

Source: Research on Chemical Intermediates, Volume 34, Numbers 8-9, 2008 , pp. 669-677(9)

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Abstract:

The exfoliation-reduction of VOPO₄ · 2H₂O in 1-butanol or iso-butanol alone, and in a 1-butanol/ethanol or iso-butanol/ethanol mixture, were conducted. Although all precursors were composed of a lamellar compound with intercalated alcohol molecules, VOHPO₄ · 0.5H₂O was formed when the exfoliation-reduction process was carried out in the mixed alcohol. All precursors transformed to a single phase of (VO)₂P₂O₇ under the reaction conditions for n-butane oxidation, but the crystallinity of (VO)₂P₂O₇ was different. The catalyst synthesized in iso-butanol/ethanol was well crystalline (VO)₂P₂O₇, and exhibited higher selectivity to maleic anhydride than that synthesized in iso-butanol alone for the n-butane oxidation.

Keywords: EXFOLIATION; REDUCTION; SELECTIVITY; MALEIC ANHYDRIDE

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156856708786189339

Affiliations: 1: Research Faculty of Environmental Earth Science, Hokkaido University, 060-0810 Sapporo, Japan

Publication date: 2008-10-01