PURPOSE: To maintain catalyst activity stably over a long period of time by allowing a copper alloy melt having specific components to scatter centrifugally and cooling the scattering fine particles to solidify in an inert gaseous atmosphere.
CONSTITUTION: The components of the copper alloy are composed of, by weight %, 30 to 60% copper, 0.5 to 25% zinc, 0.5 to 10% chromium, and the balance substantially aluminum. The alloy melt is dropped stop a disk rotating at a high speed to allow the melt to scatter centrifugally. The scattering fine liquid droplet are cooled to solidify in the inert gaseous atmosphere. The resulted spherically alloy particles are subjected to a development treatment with an aq. alkaline soln., by which the spherical Raney copper catalyst is produced. As a result, the spherical Raney copper catalyst which is substantially free from a change in the grain size in spite of repetitive long-term use is produced.
NEGISHI KENJI
NAGASAWA MINORU
IWATANI KATSUNORI
