A SCHEME FOR THE ANALYSIS OF MONAZITE AND MONAZITE CONCENTRATES
A scheme using ion-exchange methods is described for the analysis of monazites and monazite concentrates. The sample is opened up with concentrated sulphuric acid, and the resultant solution is applied to a column of Zeocarb 225 resin. After phosphate has been washed out, lead, aluminum, titanium, iron, uranium, calcium, and magnesium are eluted with N hydrochioric acid and determined by specific, mainly spectrophotometric, methods. Rare earth elements are eluted with 3N hydrochloric acid. Cerium is separated from the other rare earths by solvent extraction of its nitrate with methyl-iso-butyl ketone; both groups are determined gravimetrically. Thorium is eluted from the ion-exchange resin with 3.6N sulphuric acid and determined spectrophotometrically with thorin. The sulphuric acid-insoluble minerals are brought into solution by a double fusion method, and the determinations are carried out by a combination of ion- exchange and photometric procedures. Silica, phosphorus pentoxide, tin, and chromium are determined by photometric methods, using separate portions of the sample. Lanthanum, yttrium, and ytterbium are determined in a 1M perchloric acid solution of the mixed rare earth oxides (less cerium) using flame photometry. Samarium, praseodymium, and neodymium are determined by spectrophotometry. (auth)
- Research Organization:
- Univ. of Liverpool
- NSA Number:
- NSA-17-019959
- OSTI ID:
- 4723658
- Journal Information:
- Analytica Chimica Acta (Netherlands), Journal Name: Analytica Chimica Acta (Netherlands) Vol. Vol: 28; ISSN ACACA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
AN ION-EXCHANGE METHOD FOR THE SEPARATION OF THORIUM FROM RARE EARTHS, AND ITS APPLICATION TO MONAZITE ANALYSIS
RAPID RADIOCHEMICAL SEPARATION AND ACTIVATION ANALYSIS OF RARE EARTH ELEMENTS
Related Subjects
CALCIUM
CERIUM
CERIUM NITRATES
CHEMISTRY
CHROMIUM
CLEANING
COMBUSTION
HYDROCHLORIC ACID
ION EXCHANGE
IRON
KETONES
LANTHANUM
LEACHING
LEAD
MAGNESIUM
MELTING
MONAZITES
NEODYMIUM
ORE PROCESSING
PERCHLORIC ACID
PHOSPHATES
PHOSPHORUS OXIDES
PRASEODYMIUM
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
RARE EARTHS
RESINS
SAMARIUM
SEPARATION PROCESSES
SILICON OXIDES
SOLUTIONS
SOLVENT EXTRACTION
SPECTROSCOPY
SULFURIC ACID
THORIN
THORIUM
TIN
TITANIUM
URANIUM
YTTERBIUM
YTTRIUM