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Versatile PdTe/C catalyst for liquid-phase oxidations of 1,3-butadiene

Paper ID Volume ID Publish Year Pages File Format Full-Text
38842 45793 2016 9 PDF Available
Title
Versatile PdTe/C catalyst for liquid-phase oxidations of 1,3-butadiene
Abstract

•PdTe/C catalyst can participate competing radical chain and heterolytic route in liquid-phase oxidation of 1,3-butadiene.•Specific location of tellurium on the surface of palladium particles in the catalyst.•High selectivity to 1,4-butenediol derivatives in DMA (61%) and MeOH (84%).

A commercial Pd catalyst based on Sibunit carbon support was treated with H6TeO6 in a reducing media to obtain a Te coating on the surface of Pd particles. The PdTe/C catalyst prepared in this way showed the ability to control the radical chain oxidation of 1,3-butadiene by promoting the selective formation of 2-butene-1,4-diol, 4-hydroxybut-2-enal and furan in DMA (total selectivity of 61% and yield of 7%). At the same time, the catalyst induced oxidation of 1,3-butadiene by a non-radical heterolytic mechanism involving the formation of two groups of primary products: (1) сrotonaldehyde and methyl vinyl ketone and (2) the products of oxygenation at the 1,4-positions. The compounds of the second group including 1,4-dimethoxy-2-butene and maleic acid dimethyl ester were formed on PdTe centers in MeOH. Increasing the Te concentration in the PdTe/C catalyst forced the conversion of 1,3-butadiene toward 1,4-oxygenation and simultaneously decreased the intensity of secondary oxidation, resulting in the selective formation of derivatives of the 1,4-oxygenation—1,4-dimethoxy-2-butene and allenic alcohol methyl ether (total selectivity of 84% and yield of 48%).

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Keywords
Butadiene; Liquid-phase oxidation; Heterogeneous catalysis; PdTe/C catalyst
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Versatile PdTe/C catalyst for liquid-phase oxidations of 1,3-butadiene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 513, 5 March 2016, Pages 30–38
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us