Hydrogenation of Fatty Esters over Ruthenium–Tin Catalysts; Characterization and Identification of Active Centers

Pouilloux, Yannick; Autin, F; Guímon, C.; Barrault, J.

doi:10.1006/jcat.1998.2044

Cited by 114 publications

(118 citation statements)

References 12 publications

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“…Ruthenium hydroxide formation on alumina support could be due to Al-O-Al bridged species [20]. Since, we used NaBH 4 reduction method, complete reduction of ruthenium precursors did not take place particularly in case of silica and alumina supports where more stable other ruthenium species were formed [26]. Since, 5 % Ru/C showed the highest activity and selectivity, further studies on effect of reaction conditions on methyl levulinate hydrogenation was carried out using this catalyst and the results are discussed below.…”

Section: Activity Testingmentioning

confidence: 95%

Surface Species of Supported Ruthenium Catalysts in Selective Hydrogenation of Levulinic Esters for Bio-Refinery Application

2012

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Several supported noble metal catalysts were screened for the hydrogenation of methyl levulinate to c-valerolactone (GVL). Among these catalysts 5 % Ru/C showed the highest conversion of 95 % of methyl levulinate with 91 % selectivity to GVL. A detailed characterization was carried out using TPR, XRD, XPS and BET techniques. XPS studies revealed that higher extent of Ru 0 species in case of carbon supported Ru was responsible for its higher hydrogenation activity as compared to Ru on other supports. Effect of process parameters such as temperature, H 2 pressure, catalyst and substrate concentration and metal loading on methyl LA conversion and selectivity to GVL also has been studied. 5 % Ru/C catalyst was found to be stable up to five reuses.

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Section: Activity Testingmentioning

confidence: 95%

Surface Species of Supported Ruthenium Catalysts in Selective Hydrogenation of Levulinic Esters for Bio-Refinery Application

2012

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“…These peracids are produced from the oxidation of organic acids with hydrogen peroxide using strong mineral acids, e.g., sulfuric acid as catalyst. For environmentally benign production, it is desirable to replace such strong mineral acids by heterogeneous catalysts, for example Amberlyst 15, in order to avoid problems such as corrosion or the production of large amounts of salt from their neutralization [16,20]. However, the use of in situ-generated peracids in the presence of sulfuric acid apparently gave better results than Amberlyst 15 in the epoxidation of SBO.…”

Section: Epoxidation Of Sbomentioning

confidence: 99%

Modification of soybean oil for intermediates by epoxidation, alcoholysis and amidation

Lee

Hailan

Jin

et al. 2008

Korean J. Chem. Eng.

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Vegetable oils are a major source of many base chemicals. Unfortunately, most vegetable oils exhibit lower thermal and oxidation stability because of double bonds and even worse low-temperature behaviors. These physical and chemical properties can be improved by various chemical modifications. The catalytic hydrogenation of soybean oil (SBO) over 25% Ni/SiO 2 and 5% Pt/C is one of them, and the epoxidation of soybean oil and reduced soybean oil (RSBO) was carried out by using 30% of hydrogen peroxide and acetic acid in the presence of conc. sulfuric acid, and/ or acidic Amberlyst 15 resin catalyst. Various alcohols and amines were added to the epoxidized soybean oil (ESBO) in the hope of improving lubricant properties. The reaction products were carefully analyzed by means of 1 H-NMR, FT-IR spectroscopies and GC-MS spectrometry. This paper covers the epoxidation of virgin and RSBOs, alcoholysis and amidation of ESBO and SBO. Finally, the structures of cross linked products synthesized from ESBO and SBO with 1,6-hexamethylendiamine were proposed.

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“…The selective reduction of unsaturated esters to unsaturated alcohols is particularly difficult to achieve. The selective hydrogenation of methyl oleate to the corresponding unsaturated alcohol was achieved with Ru-Sn-B/Al 2 O 3 catalysts prepared by reduction with NaBH 4 of Ru and Sn salts co-impregnated on alumina [34].…”

Section: Catalytic Conversion Of Triglycerides To Surfactantsmentioning

confidence: 99%

Catalytic routes from renewables to fine chemicals

2007

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Hydrogenation of Fatty Esters over Ruthenium–Tin Catalysts; Characterization and Identification of Active Centers

Cited by 114 publications

References 12 publications

Surface Species of Supported Ruthenium Catalysts in Selective Hydrogenation of Levulinic Esters for Bio-Refinery Application

Surface Species of Supported Ruthenium Catalysts in Selective Hydrogenation of Levulinic Esters for Bio-Refinery Application

Modification of soybean oil for intermediates by epoxidation, alcoholysis and amidation

Catalytic routes from renewables to fine chemicals

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