THE EXTRACTION OF THE NIOBIUM SALT OF PYRROLIDINEDITHIOCARBAMINATE

Journal Article · Sun Apr 21 04:00:00 EST 1963 · Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals

OSTI ID:4694784

Gibalo, I M; Alimarin, I P; Davaadorzh, P

The ammonium salt of pyrrolidinedithiocarbaminate (PDT) was synthesized from pyrrolidine with the use of tetrahydrofuran as a starting material. This compound was used as an analytical reagent to recover Nb from a solution containing approximates 1 mg/ml of Nb/sub 2/O/sub 5/ and 2 to 3% of tartaric, citric, or oxalic acids. Nb/sup 95/ was used as a tracer. Experiments with 2 to 30 mg of Nb/sub 2/O/sub 5/ showed that the niobium salt of PDT is precipitated quantitatively from the tartaric and oxalic acid solutions in the form of a white amorphous precipitate with a 20-fold excess of reagent in the presence of an acetate buffer at a pH of 4 to 5. The extraction of the Nb salt of PDT with chloroform is quantitative from a weak acid solution (pH of 4 to 5), and from concentrated HCL (8.5 to 10 N). Citric acid, fluorine, and sulfate interfere with the extraction. The extraction should be repeated 2 to 3 times after adding a 15- to 20-fold excess of reagent in order to obtain quantitative extraction of the niobium. This solvent extraction method can be used to separate niobium from tantalum, titanium, zirconium, tungsten, beryllium, the rare earths, and other elements. (TTT)

• Research Organization: Moscow State Univ.
• NSA Number: NSA-17-028807
• OSTI ID: 4694784
• Journal Information: Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals, Journal Name: Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals Vol. Vol: 149; ISSN DANKA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACIDITY
AMINES
AMMONIUM COMPOUNDS
BERYLLIUM
CARBAMATES
CHEMISTRY
CHLOROFORM
CITRIC ACID
FLUORINE
FURANS
HYDROCHLORIC ACID
INTERFERING ELEMENTS
NIOBIUM
NIOBIUM 95
NIOBIUM OXIDES
ORGANIC ACIDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXALIC ACID
OXYGEN COMPOUNDS
PDT
PRECIPITATION
PREPARATION
PYRROLIDINES
QUALITATIVE ANALYSIS
RARE EARTHS
RECOVERY
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SULFATES
TANTALUM
TARTARIC ACID
TITANIUM
TRACER TECHNIQUES
TUNGSTEN
USES
ZIRCONIUM