INFLUENCE OF pH ON THE STRUCTURING OF LAYERED GADOLINIUM HYDROXONITRATES

A study of the effect of pH on the formation process of gadolinium hydroxonitrate was made. As a result, it was found that precipitation at a constant pH in the range from 7,6 to 9,2 results in structured particles. While precipitation at higher or lower pH values results in the formation of gelatinous sediments

EXTRACTION OF MOLYBDENUM FROM SPENT CATALYSTS

Spent catalysts are one of the important sources of secondary raw materials for rare metals. The composition of catalysts used in the petrochemical industry for hydrotreating, hy-drodesulfurization, and hydrocracking of oil usually includes rare (Mo, V, W) and heavy non-ferrous metals (Ni, Co)

EXTRACTION OF ZINC FROM DUST OF FERROUS METALLURGY PRODUCTION

In this paper, the extraction of zinc from ferrous metallurgy send dust with nitric and hydrochloric acid, as well as with a solution of ammonium chloride, is described. The maximum extraction rate of zinc was 98.45% using a solution of nitric acid of 100 g/l