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Dehydration of 1,4-butanediol over rare earth oxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
42649 45935 2009 8 PDF Available
Title
Dehydration of 1,4-butanediol over rare earth oxides
Abstract

Vapor-phase catalytic dehydration of 1,4-butanediol was investigated over rare earth oxides (REOs) calcined at different temperatures. In the dehydration of 1,4-butanediol over REOs, 3-buten-1-ol was mainly produced, together with tetrahydrofuran (THF). Weakly basic heavy REOs, such as Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3, and Y2O3, showed high selectivity to 3-buten-1-ol, while strongly basic light REOs, such as La2O3, Pr6O11, Nd2O3, Sm2O3, and Eu2O3, produced more THF and γ-butyrolactone. Heavy REOs exhibited different catalytic activities in the dehydration of 1,4-butanediol depending on their crystal structures. Cubic C-type REOs selectively produced 3-buten-1-ol; in particular, cubic Er2O3, Yb2O3, and Lu2O3 showed the highest formation rates of 3-buten-1-ol. Since the formation rate of 3-buten-1-ol was suppressed over Er2O3 in acidic CO2 or basic NH3 carrier gas flow, it is probable that the active centers for the formation of 3-buten-1-ol are composed of both basic and acidic sites.

Graphical abstractVapor-phase catalytic dehydration of 1,4-butanediol was investigated over rare earth oxides (REOs) calcined at different temperatures. In the dehydration of 1,4-butanediol over the REOs, 3-buten-1-ol was dominantly produced, together with the formation of tetrahydrofuran. Weakly basic heavy REOs, such as Er2O3, Yb2O3, and Lu2O3, calcined at 1000 °C with C-type bixbyite structure showed high formation rates of 3-buten-1-ol.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Homoallyl alcohol; 3-Buten-1-ol; 1,4-Butanediol; Dehydration; Rare earth oxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 356, Issue 1, 1 March 2009, Pages 64–71
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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