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Esterification of phthalic anhydride with 1-butanol and 2-ethylhexanol catalyzed by heteropolyacids |
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| Authors: | M. Arabi M. Mohammadpour Amini M. Abedini A. Nemati M. Alizadeh |
| Affiliation: | a Department of Chemistry, University of Tehran, Tehran, Iran b Department of Chemistry, Shahid Beheshti University, Tehran, Iran c Department of Chemistry, Fardosi University, Mashhad, Iran |
| Abstract: | Esterification of phthalic anhydride with 2-ethylhexanol and 1-butanol and ester decomposition of dioctyl phthalate (DOP) in presence of Keggin; H3PW12O40, H4SiW12O40, H4SiMo12O40, Wells–Dawson; H6P2W18O62, H6P2W17MoO62 and Preyssler; H14[NaP5W29MoO110], H14[NaP5W30O110], type heteropolyacids have been investigated. The heteropolyacids with Preyssler and Wells–Dawson structures and their molybdenum substituted derivatives show higher activity in esterification and ester decomposition reactions than Keggin type heteropolyacids. A complete conversion of phthalic anhydride to dioctyl phthalate and dibutyl phthalate are achieved in 2 h in presence of molybdenum substituted Preyssler heteropolyacid. In the decomposition of dioctyl phthalate in the presence of Preyssler heteropolyacid, 2-ethylhexene is formed in quantitative yield. |
| Keywords: | Heteropolyacid Solid acid Esterification Phthalic anhydride 2-Ethylhexanol 1-Butanol |
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