Separation of Tantalum and Niobium From the Treated Sulfate Liquor Using Isodecanol

Abstract

A technological sample of polymetallic sedimentary rocks collected from southwestern Sinai (2.61% RE 2 O 3 , 1.14% Ta 2 O 5 and 2.16% Nb 2 O 5 ) is subjected to processing via sulfuric acid agitation leaching under different conditions. The produced sulfate liquor is chemically treated involving precipitation of REEs as oxalates. The treated sulfate solution was obtained and used for recovery of Nb and Ta using solvent extraction as isodecanol. The relevant factors for the extraction and stripping processes of Nb and Ta have been optimized. Highly pure products of Nb and Ta have properly been prepared and analyzed using ICP-MS.

Solvent Extraction of Yttrium from Rare Earths Concentrate Using Cyanex 272 and PC88A

“…sulfuric acid at 1/2.5 ore/acid ratio and the dissolution temperature of 250 0 C for 3 h for nearly complete dissolution of the rare earth elements. This is followed by precipitation of REEs as oxalates and ignited at 850 0 C for 1h to get on RE 2 O 3 which known as rare earth concentrate (13) .…”

“…Xenotime, a phosphate mineral, is one of the important mineral deposits of rare earths (>40% Y) and most of its elements are included within the operation of atomic reactor. Xenotime mineral can be processed by either caustic fusion (12) or by the sulfuric acid process (13) or by ferric sulfate leaching (14) followed by addition of oxalic acid on rare earths sulfate to get on rare earths oxalate. The rare earths hydroxide and rare earths oxalates are ignited at 850 o C to get on rare earths concentrate and outlined by the Eqs.…”