Catalyst in the form of grains of which 90|% or more by weight have a particle-size not exceeding 10|micrometres, consisting of a mixture of oxides on a magnesium-silicate support, containing by weight:
                            -|20|% or more but not more than 35|% of copper and
                            -|2|% or more but not more than 3|% of bismuth,
                            and of an apparent specific gravity of 0,2|or more but not exceeding 1,0
Export control
condition:B,certificate:9011,action:29|condition:B,certificate:9022,action:29|condition:B,action:09