Selective hydrogenation of α,β-unsaturated aldehydes to unsaturated alcohols over mixed ruthenium–tin boride catalysts

Narasimhan, C. S.; Deshpande, V. M.; Ramnarayan, K.

doi:10.1039/c39880000099

Cited by 30 publications

(8 citation statements)

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“…Similar results have been reported for addition to platinum of Fe3+, Zn2+, Ti4+, and Ge4+ (Tuley and Adams, 1925; Galvagno et al, 1986;Goupil et al, 1987;Giroir-Fendler et al, 1988;Galvagno et al, 1989;Vannice and Sen, 1989). An enhanced rate of C=0 bond hydrogenation has also been reported for addition of Cu to Ni-based catalysts (Noller and Lin, 1984) and of Sn and B to Ru (Narasimhan et al, 1988).…”

Section: Introductionmentioning

confidence: 68%

Kinetics of liquid-phase hydrogenation of cinnamaldehyde over a platinum-tin/nylon catalyst

Tronconi¹,

Crisafulli²,

Galvagno³

et al. 1990

Ind. Eng. Chem. Res.

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Section: Introductionmentioning

confidence: 68%

Kinetics of liquid-phase hydrogenation of cinnamaldehyde over a platinum-tin/nylon catalyst

Tronconi¹,

Crisafulli²,

Galvagno³

et al. 1990

Ind. Eng. Chem. Res.

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“…XPS characterization showed that there existed a small amount of boride associated with Ru and a large amount of borate adsorbed on the Ru surface. 7 In fact, conventional supported or unsupported Ru catalysts are usually prepared by NaBH 4 reduction, [8][9][10] and all contained boron species. It had been found that boron species had an obvious influence on the performance of Ru catalysts.…”

Section: Introductionmentioning

confidence: 99%

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2001

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A series of polymer-stabilized ruthenium nanoparticles with various dimensions are prepared by heating or refluxing a polyol solution of ruthenium(III) salts. The average diameters of Ru nanoparticles can be controlled in the range of 1.4-7.4 nm with relative standard deviations of less than 0.3 by changing the polyols, the reduction temperature and/or the amount of protective polymer. The larger ruthenium particles are obtained in the order of EGwDEGwTrEG, indicating that the slower reduction rate of Ru 3z ions is a decisive factor for obtaining larger particles. The ruthenium particle dimensions are dependent on the reduction temperature, nature of the media and the amount of protective polymer. Preparation of PVP-stabilized ruthenium colloids in polyol mediaTypically, in a 250 mL flask, PVP (0.8325 g, 7.5610 23 mol) and RuCl 3 ?nH 2 O (0.0371 g, 1.5610 24 mol) were dissolved in polyol solvent (150 mL) under stirring to form a dark red

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“…Although various attempts have been made to develop a suitable catalytic system for selective hydrogenation of CMA to HCMA [5][6][7][8], the selectivity is still an important issue, especially under heterogeneous catalysis conditions. Because of the competitive reduction of the aldehyde carbonyl and olefin groups, the selectivity of CMA to HCMA or CMO varies considerably with the method of preparation of the catalyst, the solvent, additives, the process conditions employed and even trace impurities in the reactant [9][10][11][12][13][14]. A comprehensive review of CMA hydrogenation has been published by Gallezot and Richard [15].…”

Section: Introductionmentioning

confidence: 98%

Influence of Preparation Modes on Pt–Ni/CNTs Catalysts Used in the Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde

Zhao

et al. 2008

Catal Lett

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Pt-Ni/CNTs catalysts are prepared by different impregnation techniques and different reduction methods (H 2 , HCHO, and KBH 4 ) for the selective hydrogenation of cinnamaldehyde (CMA) to hydrocinnamaldehyde (HCMA) and investigated by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and temperature programmed reduction (H 2 -TPR) techniques. The results show that the catalytic selectivity and activity of the Pt-Ni/CNTs catalysts would significantly be improved by using KBH 4 as a reducing agent, due to the electronic synergetic effect of Pt-Ni-B, and 96% for conversion of CMA and 88% for selectivity of HCMA are obtained over Pt-Ni/CNTs catalyst reduced by KBH 4 . Furthermore, the hydrogenation rate of CMA and selectivity of CMA to HCMA over Pt-Ni/CNTs catalyst are significantly improved in the presence of trace base or acid promoters again. The best result (92% for conversion of CMA and 96% for selectivity of HCMA) is obtained when NaOAc is used as base promoter.

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Selective hydrogenation of α,β-unsaturated aldehydes to unsaturated alcohols over mixed ruthenium–tin boride catalysts

Cited by 30 publications

References 0 publications

Kinetics of liquid-phase hydrogenation of cinnamaldehyde over a platinum-tin/nylon catalyst

Kinetics of liquid-phase hydrogenation of cinnamaldehyde over a platinum-tin/nylon catalyst

Untitled

Influence of Preparation Modes on Pt–Ni/CNTs Catalysts Used in the Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde

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