Method of purifying barium nitrate aqueous solution
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United States of America Patent
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Jan 19, 2010
Grant Date -
N/A
app pub date -
Jun 15, 2006
filing date -
Jun 15, 2006
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Purification techniques have been developed for ceramic powder precursors, e.g., barium nitrate. These techniques can be performed using one or more of the following operations: (1) removal of impurities by precipitation or coprecipitation and separation using a nonmetallic-ion-containing strong base, e.g., tetraalkylammonium hydroxides; (2) reduction of higher oxidation-state-number oxymetal ions and subsequent precipitation as hydroxides that are separated from the solution; and (3) use of liquid-liquid exchange extraction procedures to separate certain impurities.
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International Classification(s)
- C22B:PRODUCTION OR REFINING OF METALS
- G21F:PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, C....
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
- C01F:COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUM....
- C02F:TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE....
- B01D:SEPARATION
- C01D:COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, ....
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