Catalysts in the form of grains of which ? 90% by weight have a particle-size ?10 micrometres, consisting of a mixture of oxides on a magnesium-silicate support, containing by weight ? 20% but ?35% of copper and ?2% but ?3% of bismuth, etc.
Katalizatorji na nosilcu, drugi, v obliki zrnc, iz mešanice oksidov na nosilcu iz magnezijevega silikata