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  • 1
    Electronic Resource
    Electronic Resource
    The catalysis of the Ruff oxidative degradation of aldonic acids by titanium‐containing zeolites (2000)
    Springer
    Catalysis letters 69 (2000), S. 241-244 
    Details
    ISSN: 1572-879X
    Keywords: Ruff degradation ; carbohydrates ; oxidative degradation ; hydrogen peroxide ; microporous titanium‐containing molecular sieves
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ti‐BEA and Ti‐FAU, obtained by post‐synthesis treatment, and TS‐1, obtained by direct hydrothermal synthesis, have been tested as catalysts for the Ruff oxidative degradation of calcium d‐gluconate to d‐arabinose using diluted hydrogen peroxide as oxidant. Only large‐pore zeolites Ti‐BEA and Ti‐FAU were found to be active. It was shown, in particular, that a very rapid leaching of titanium occurred and that the titanium species present in the solution were responsible for the catalytic activity observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019022023326
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Vapour‐phase synthesis of n‐butanethiol from n‐butanol and carbon disulfide over alkali‐promoted chromia on γ‐alumina catalysts (2000)
    Springer
    Catalysis letters 64 (2000), S. 197-200 
    Details
    ISSN: 1572-879X
    Keywords: n‐butanethiol ; n‐butanol ; carbon disulfide ; chromia on alumina catalysts ; thiolation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The vapour‐phase reaction of n‐butanol and carbon disulfide was performed in a fixed‐bed flow reactor in the presence of a potassium‐carbonate‐promoted chromia on γ‐alumina catalyst, namely G41P from Girdler. A high selectivity to n‐butanethiol (85%) was obtained at 250°C with a 1 : 1 n‐butanol : carbon disulfide molar ratio, a contact time of 6 s and a flow rate of 0.03 ml/min. Under these conditions no isomeric mercaptans were obtained. The amount of secondary products, di‐n‐butyl sulfide and di‐n‐butyl disulfide, is relatively low and decreases with decrease of n‐butanol conversion. However, the catalyst was shown to deactivate relatively rapidly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019099323017
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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