Determining rhenium in weak processing solutions

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:6037775

Koval', L B

Analytical methods of determining rhenium in production solutions and solid materials almost always include a stage of separating molybdenum, since these elements occur together in molybdenum ores and concentrates. The authors have developed a method of analysis for rhenium in low-concentration industrial solutions containing a complicated set of impurities. The molybdenum is separated from rhenium in a separating funnel and the acidity is brought to 1 M. A 20% solution of KCNS is added together with ascorbic acid. The funnel is shaken for 1-2 min and left to stand until the molybdenum is completely reduced (5-10 min), and then the thiocyanate complex of the molybdenum is extracted with diethyl ether. The lower water layer is transferred to a volumetric flask and the necessary reagents are added to reduce the rhenium and produce the yellow-orange rhenium thiocyanate complex. The peak optical density of the complex is measured with a photocolorimeter and the absorption spectra are recorded with a spectrophotometer.

• Research Organization: Institute of General and Inorganic Chemistry, Kiev, USSR
• OSTI ID: 6037775
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 52:3; ISSN INDLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
ABSORPTION SPECTROSCOPY
ALKALI METAL COMPLEXES
ANTITHYROID DRUGS
ASCORBIC ACID
CARBONIC ACID DERIVATIVES
CHEMICAL ANALYSIS
COMPLEXES
COMPLEXOMETRY
DISPERSIONS
DRUGS
ELEMENTS
EXTRACTION
HORMONE ANTAGONISTS
IMPURITIES
INTERFERING ELEMENTS
METALS
MIXTURES
MOLYBDENUM
MOLYBDENUM COMPLEXES
MOLYBDENUM ORES
ORE CONCENTRATES
ORE PROCESSING
ORES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
POTASSIUM COMPLEXES
PROCESS SOLUTIONS
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RHENIUM
RHENIUM COMPLEXES
SAMPLE PREPARATION
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTROPHOTOMETRY
SPECTROSCOPY
THIOCYANATES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
VITAMINS