Standard test method for total cobalt in alumina-base cobalt--molybdenum catalyst by the potentiometric titration method

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Annu. Book ASTM Stand.; (United States)

OSTI ID:6684715

In order to determine cobalt in freshly-prepared cobalt-molybdenum catalyst, the sample is decomposed by heating with H/sub 2/SO/sub 4/. The cooled solution is diluted to volume, and an aliquot containing 10 to 30 mg of cobalt is reacted with measured volumes of potassium ferricyanide and ammonium citrate solutions, ammonia, and petroleum ether. The excess of ferricyanide is then back titrated with a standard cobalt solution. Nickel, phosphorus, silicon, aluminium, and molybdenum do not interfere. Iron, chromium, vanadium, and manganese do interfere.

• OSTI ID: 6684715
• Journal Information: Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 25; ISSN ASTSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
CATALYSTS
CHALCOGENIDES
CHEMICAL ANALYSIS
COBALT
COBALT COMPOUNDS
COBALT OXIDES
ELEMENTS
METALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
OXIDES
OXYGEN COMPOUNDS
POTENTIOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
TITRATION
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS