Flotation of diaspore and aluminosilicate minerals applying novel carboxyl hydroxamic acids as collector

Application of Hydroxamic Modified Calix[6]arene for Selective Extraction of Uranium (VI)

“…1. The calix [6]arene hydroxamic derivatives were synthesized based on previously reported procedures [7,8]. And the structure of calix [6]arene hydroxamic derivatives is shown in Fig.…”

“…Such functional groups include amidogen, acylamino, pyridine and Schiff base. The larger cavity in calix [6]arenes and calix [8]arenes with six and eight aromatic rings are more suitable for anchoring binding groups than calix [4]arenes. Uranium is an important radioactive element, and excessive amounts of uranium are released into the environment through activities associated with the nuclear industry and mining.…”

The flotation of low-grade manganese ore using a novel linoleate hydroxamic acid

“…Traditional collectors including oleic acid, tall oil, oxidized paraffin wax soap and other anionic organic compounds have been used for rhodochrosite flotation but the results from these collectors are far from satisfactory [11]. On the other hand, hydroxamic acid used as the collector has been extensively applied in the flotation of rare earth minerals due to the fact that it has nitrogen and oxygen atoms, which contain lone pair electrons to coordinate with metal atoms [12][13][14]. Investigations on the interaction of hydroxamic acid with manganese ore, was not systematically investigated, in spite of its use as the flotation collector of manganese ore even at plant level.…”

N-(6-(hydroxyamino)-6-oxohexyl) decanamide collector: Flotation performance and adsorption mechanism to diaspore

“…Collectors play a crucial role in the flotation process whose implementation depends on the selective adsorption of a collector onto an objective mineral to produce a hydrophobic surface for attaching bubble. Various surfactants have been evaluated to remove aluminosilicate minerals from diasporic ores by flotation process in recent years [1][2][3][4][5][6][7][8][9][10][11][12][13]. Among them, oleic acid has been proved to be an effective collector for flotation desilication, and mono-hydroxycarbamoyl surfactants such as octyl hydroxamic acid exhibited better flotation performances for recovery of diaspore from bauxite ores contained it [2,4].…”

“…Among them, oleic acid has been proved to be an effective collector for flotation desilication, and mono-hydroxycarbamoyl surfactants such as octyl hydroxamic acid exhibited better flotation performances for recovery of diaspore from bauxite ores contained it [2,4]. Jiang et al [8] found that carboxyl hydroxamic acids also showed strong collecting power to diaspore and weak response against kaolinite and illite.…”