A review is presented of foam separations reported in the world literature in the period 1970–1974. Processes are included the objective of which is the removal and concentration from dilute aqueous solution of surface-active-agents; or of charged inorganic species (colligends) foam separated by surfactants. The 200 references which are cited encompass foam fractionations, ion flotations, precipitate flotations, and adsorbing colloid flotations, but do not include processes whose primary aim is the flotation of particulates. Four separations are described in some detail: cationic surfactant selectivity in the foam fractionation of inorganic anions; the foam fractionation of surfactants and of Cu (II) from seawater desalination brines; the ion flotation of Cr(VI) and precipitate flotation of Cr(III), with application to electroplating waste treatment; and the adsorbing colloid flotation of trace metallic and non-metallic species from seawater.