Sulfatization of zinc, copper and cobalt oxides by sulfur dioxide-air mixtures

Abstract

Sulfatization of zinc, copper, and cobalt oxides was performed on a fluidized bed unit at a conventional normal gas mixture velocity (air and SO₂) of 0.15 nm/s. The process was controlled by analysis of the residue. In special experiments, before the gas mixture entered the reactor, part of the sulfur dioxide was oxidized to sulfur trioxide on a vanadium catalyst. The object of the study was zinc and copper oxides of reagent grade (KhCh) and cobaltosic oxide obtained by calcining cobalt oxide of reagent grade at 700°C. The particle-size class of the material was 0.17 + 0.14 mm. The solid products of the process were analyzed by infrared spectroscopy and X-ray diffraction.

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