Verfahren zur Herstellung poroeser Metallkoerper, insbesondere zur Verwendung als Katalysatoren

摘要

Ethylene is oxidized to ethylene oxide in the gaseous phase in the presence of Ag on SiC or Ag on Al powder which has been prepared by decomposing a silver salt of an a -hydroxy carboxylic acid which has been intimately mixed with the support. In Example 1 oxidation is effected in a tubular reactor at 260 DEG C. The catalysts are also stated to be useful inter alia for the dehydrogenation of primary alcohols to aldehydes but no example is given.ALSO:Oxidation catalysts are made by intimately mixing a heat-resistant material with a metal compound which is thermally decomposable to metal and effecting thermal decomposition without alteration of the heat resistant material, the metal compound being a Cu or Ag salt of an a -hydroxycarboxylic acid. Additionally the catalyst may contain Mg, Ba, Co, Ni, Au or Pt. In examples Ag is mounted on SiC and Al powder. The heat-resistant material may have a gram size of 10-2000m .