Liquid-phase diacetoxylation of 1,3-butadiene with Pd/Te/C catalyst
Of various catalysts tested, a catalyst containing an 8:1 ratio of palladium/tellurium (0.0003 g atom Pd/g catalyst) on a charcoal support was most active in the liquid-phase conversion (at 90/sup 0/C) of butadiene in acetic acid to diacetoxybutene, an intermediate in the manufacture of 1,4-butanediol, which in turn is used to make polymers, tetrahydrofuran, and pyrollidone. The product distribution was 75Vertical Bar3< trans-1,4-diacetoxy-2-butene, 14Vertical Bar3< cis-1,4-diacetoxy-2-butene, and 10Vertical Bar3< 3,4-diacetoxy-1-butene. The reaction was first order in oxygen, had an apparent activation energy of 6.4 kcal/mole, was approx. 0.8 order in catalyst, and changed selectivity with changing butadiene concentration. The reaction apparently proceeded via a m-allyl intermediate on palladium-tellurium intermetallic compounds.
- Research Organization:
- Inst. Fr. Pet.
- OSTI ID:
- 6916508
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 58:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORBENTS
BUTADIENE
CATALYSTS
CHARCOAL
CHEMICAL REACTION KINETICS
CONVERSION
DATA
DIENES
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
KINETICS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PALLADIUM
PLATINUM METALS
POLYENES
REACTION INTERMEDIATES
REACTION KINETICS
SEMIMETALS
TELLURIUM
TESTING
TRANSITION ELEMENTS
YIELDS