Recovery of nickel@ and magnesium@ from natural substances

摘要

Ni and Mg are recovered from natural Ni and Mg-contg. substances by a process in which a spent catalyst based on Fe and with a S content of at least 10 wt.% is mixed in a ratio of 1:2-8:1 with the natural material, contg. at least 0.1 wt.% each of Ni and Mg. A suspension with a pH of at most 4 is formed with water and is subjected to a pressure of 13.79-41.37 bar and temp. of 50-350 deg. C. An oxidn. agent is injected to give a homogeneous distribution of components.