Heterogeneous liquid phase catalysis by metal (IV) phosphates of cyclic ether formation and a reverse Prins reaction

Al-Qallaf, Fawzia A. H.; Hodson, Lisa F.; Johnstone, R. A. W.; Liu, Jun-Yao; Lu, Lyan Ywan; Whittaker, D.

doi:10.1016/s1381-1169(99)00296-4

Cited by 18 publications

(10 citation statements)

References 12 publications

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“…In addition, the application as novel monomer for bio-based polymer is accelerating the research on a more efficient isosorbide progress. The outstanding catalytic performance of metal (IV) phosphates for selective catalysis in the formation of mono-and bi-cyclic ethers from diols has been examined [10]. This kind of catalysts contain structural hydroxyl groups with labile protons, moderate strength acidity, the co-exist of Brönsted and Lewis acid sites, and therefore are potential candidates as solid acid catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…This kind of catalysts contain structural hydroxyl groups with labile protons, moderate strength acidity, the co-exist of Brönsted and Lewis acid sites, and therefore are potential candidates as solid acid catalysts. They have been used in a variety of reactions like dehydration of alcohols [11], isomerization of alkenes [12] and reverse Prins reaction [10].…”

Section: Introductionmentioning

confidence: 99%

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Metal (IV) Phosphates as Solid Catalysts for Selective Dehydration of Sorbitol to Isosorbide

Zhang

et al. 2009

Catal Lett

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Metal (IV) phosphates of tin, zirconium and titanium were used as catalysts for selective dehydration of sorbitol to isosorbide. Tin phosphate showed the highest selectivity to isosorbide with a moderate conversion. The deactivation rates of catalysts were fitted by an empirical Voorhies equation and the results showed tin phosphate had the lowest deactivation rate with the least values of m and n. Thermal analysis showed deactivation rate was in accordance with coke deposition. The acidity caused by functional groups of the catalysts was the direct factor for catalyst lifetime, which was evidenced by NH 3 -TPD, XRD, IR and Raman characterizations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metal (IV) Phosphates as Solid Catalysts for Selective Dehydration of Sorbitol to Isosorbide

Zhang

et al. 2009

Catal Lett

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“…Al-Qallaf et al [22] described good performances of metal(IV) phosphates for selective formation of mono-and bi-cyclic ethers from diols. Metal(IV) oxides modified with H 3 PO 4 [23] and metal(IV) phosphates, as tin, zirconium and titanium phosphates [24,25] were tested for selective dehydration of sorbitol to isosorbide in gas-phase.…”

Section: Introductionmentioning

confidence: 99%

Metal phosphate catalyzed dehydration of sorbitol under hydrothermal conditions

Rusu

Hoelderich

Wyart

et al. 2015

Applied Catalysis B: Environmental

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“…Amorphous titanium phosphates showed some, though minor (7%), activity in the ester production from menthol and isovaleric acid in the liquid state [18]. 1,3-Diols refluxed in the presence of amorphous zirconium or titanium phosphate undergo a retro-Prins reaction yielding a cyclic ketone and ethene (though the main product is still the expected cyclic alkene) [19,20]. Potassium exchanged layered zirconium hydrogen phosphate was employed as a catalyst for the cyanosililation of carbonyl compounds [21].…”

Section: Introductionmentioning

confidence: 99%