Dehydration of 1,4-butanediol over rare earth oxides

Sato, Satoshi; Takahashi, Ryōji; Kobune, Mika; Inoue, Hirotomo; Izawa, Yusuke; Ohno, Hironobu; Takahashi, Kazunari

doi:10.1016/j.apcata.2008.12.017

Cited by 73 publications

(62 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[56] In the dehydration of 1,4-butanediol, 3-buten-1-ol is produced over CeO 2 between 375 8C to 450 8C. [56][57][58] The better selectivity (68.1 %) was observed at 400 8C. Side reactions, such as isomerization of the initial product, but-3-en-1-ol, hydrogenation, and dehydrogenation proceed, together with the cyclization of 1,4-butanediol to tetrahydrofuran (Scheme 3).…”

Section: Dehydration Of Diolsmentioning

confidence: 99%

“…[58] In the reaction of 1,5-pentanediol, CeO 2 catalyzed only undesirable side reactions, such as dehydrogenation, as well as dehydration; [59] d-valerolactone and cyclopentanone being the major products. The authors speculated that the redox cycle of Ce 4+ /Ce 3+ on the surface of CeO 2 plays a key role in the activation of 1,5-pentanediol.…”

Section: Dehydration Of Diolsmentioning

confidence: 99%

See 1 more Smart Citation

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

362

244

View full text Add to dashboard Cite

Ceria has been the subject of thorough investigations, mainly because of its use as an active component of catalytic converters for the treatment of exhaust gases. However, ceria‐based catalysts have also been developed for different applications in organic chemistry. The redox and acid–base properties of ceria, either alone or in the presence of transition metals, are important parameters that allow to activate complex organic molecules and to selectively orient their transformation. Pure ceria is used in several organic reactions, such as the dehydration of alcohols, the alkylation of aromatic compounds, ketone formation, and aldolization, and in redox reactions. Ceria‐supported metal catalysts allow the hydrogenation of many unsaturated compounds. They can also be used for coupling or ring‐opening reactions. Cerium atoms can be added as dopants to catalytic system or impregnated onto zeolites and mesoporous catalyst materials to improve their performances. This Review demonstrates that the exceptional surface (and sometimes bulk) properties of ceria make cerium‐based catalysts very effective for a broad range of organic reactions.

show abstract

Section: Dehydration Of Diolsmentioning

confidence: 99%

Section: Dehydration Of Diolsmentioning

confidence: 99%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

362

244

View full text Add to dashboard Cite

show abstract

“…The results show a similar tendency to a previous report. 11 In the dehydration over the HT-prepared Er 2 O 3 , the 1,4-butanediol conversion was in the range between 42.2 and 71.0% (Table S2 12 ). The conversion values are quite high irrespective of the small specific surface area.…”

mentioning

confidence: 99%

“…In our previous work, 11 1,4-butanediol was dehydrated to 3-buten-1-ol with selectivity higher than 90% over commercial Er 2 O 3 nanoparticles, and it was speculated that active sites of this reaction exist on {222} facet. Much more data, however, are required to discuss active crystal facets on the catalysis.…”

mentioning

confidence: 99%

Preparation of Er2O3 Nanorod Catalyst without Using Organic Additive and Its Application to Catalytic Dehydration of 1,4-Butanediol

2012

Self Cite

View full text Add to dashboard Cite

Er 2 O 3 nanorods were successfully prepared with hydrothermal treatment without using organic additives such as surfactant, fatty acid, or alcohol. Er 2 O 3 nanorods were obtained under high temperature and/or long reaction times. Er 2 O 3 nanorods mainly exposed {440} and {400} facets on the surface. Er 2 O 3 nanorods showed excellent catalytic activity compared to commercial Er 2 O 3 nanoparticles in the dehydration of 1,4-butanediol to produce 3-buten-1-ol. 9 Other REO nanorods are also prepared with organic additives. 10 There is only one report on CeO 2 nanorods prepared without organic substance but with sodium hydroxide.2 Unfortunately, organic additives and residual metal cations often work as catalytic poison. It is desired that oxide catalysts are prepared without organic additives and metal-containing bases.In our previous work, 11 1,4-butanediol was dehydrated to 3-buten-1-ol with selectivity higher than 90% over commercial Er 2 O 3 nanoparticles, and it was speculated that active sites of this reaction exist on {222} facet. Much more data, however, are required to discuss active crystal facets on the catalysis. The purpose of this work is to prepare Er 2 O 3 nanorods without organic additives and to investigate catalytic activity of Er 2 O 3 nanorods in order to ascertain whether the active sites exist on {440} and {400} facets.Commercial Er 2 O 3 nanoparticles, supplied by Kanto Chemical Co., Ltd., Japan, were calcined at 500, 650, 800, and 1000°C, which have specific surface areas of 33.5, 26.8, 21.5, and 13.6 m 2 g ¹1 , respectively. Er 2 O 3 nanoparticle or nanorod catalyst was prepared with a HT method. Er(NO 3 ) 3 ¢5H 2 O (4.64 g, as 2.0 g of Er 2 O 3 , Sigma-Aldrich, USA) was dissolved in 50mL of distilled water. Then, the pH of the solution was adjusted to 10 with 25 wt % aqueous ammonia (Wako, Japan) with stirring. No additives such as amine, fatty acid, or alcohol were added. The solution was transferred into a 100-cm 3 Teflon-lined autoclave. Hydrothermal treatment was carried out at a prescribed temperature for a prescribed period. The resulting precipitate was filtered, washed, dried at 110°C for 12 h, and calcined at 400°C for 3 h. Here, commercial Er 2 O 3 is named as "CM-(calcination temperature (°C))," and the prepared Er 2 O 3 is named as "HT-(HT temperature (°C))-(HT time (h))."Specific surface area (SA) of the sample was calculated by the BrunauerEmmettTeller (BET) method using the N 2 adsorption isotherm at ¹196°C. Scanning electron microscope (SEM) and high-resolution transmission electron microscope (TEM) images were taken on a JEOL JSM-6510 microscope operated at 2030 kV and on a Hitachi HF-2200 microscope operated at 200 kV, respectively.Vapor-phase catalytic dehydration of 1,4-butanediol to produce 3-buten-1-ol was performed at 350°C in a fixed-bed down-flow reactor under atmospheric pressure of N 2 at a flow rate of 30 cm 3 min ¹1 . After 0.3 g of catalyst was preheated at 400°C for 1 h, 1,4-butanediol was fed into the reactor at a liquid flow rate of 1.8 cm 3 min ¹1 . A ...

show abstract

“…According to ion radius and temperature, rare earth sesquioxides can crystallize in three polymorphic forms below 2000 • C: cubic (C), monoclinic (B) and hexagonal (A); from which they transform to high temperatures H-and X-forms [4] [5][6][7][8][9][10][11][12]. It can be an effective additive in various polymers [13][14][15], an important component of new advanced ceramics [16,17], or a component in specialized optical glasses [18,19].…”

Section: Introductionmentioning

confidence: 99%

The concentration quenching of photoluminescence in Eu3+-doped La2O3

Đorđević¹,

Antić²,

Nikolić³

et al. 2013

Journal of Research in Physics

View full text Add to dashboard Cite

This work explores the influence of dopant concentration on photoluminescent emission and kinetics of Eu 3+ -doped (0.2−10 at.%) nanocrystalline lanthanumoxide powders. The X-ray diffraction analysis confirmed that all samples crystallize in La 2 O 3 hexagonal phase with space group P3m1. Transmission electron microscopy showed particles with non-uniform shape and diverse size distribution with an average particle size of (95 ± 5) nm. The room temperature photoluminescence spectra of all samples contain characteristic Eu 3+ luminescence lines with the most pronounced red 5 D 0 → 7 F 2 emission at about 626 nm. The maximum intensity of red emission is observed for the sample containing 5 at.% of Eu 3+ ions. The emission kinetics was recorded in the temperature range from 10 K to 300 K. The maximum lifetime value of 0.98 ms obtained for the sample with 0.5 at.% Eu 3+ at room temperature increases up to 1.3 ms at 10 K.

show abstract

Dehydration of 1,4-butanediol over rare earth oxides

Cited by 73 publications

References 29 publications

Ceria‐Based Solid Catalysts for Organic Chemistry

Ceria‐Based Solid Catalysts for Organic Chemistry

Preparation of Er2O3 Nanorod Catalyst without Using Organic Additive and Its Application to Catalytic Dehydration of 1,4-Butanediol

The concentration quenching of photoluminescence in Eu3+-doped La2O3

Contact Info

Product

Resources

About