Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1991-08-07
1992-12-01
Morris, Theodore
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423155, 423158, C01F 500, C01F 1100, B01D 1100
Patent
active
051679396
ABSTRACT:
The aqueous alkali chloride solution is coarsely purified first. In the succeeding fine purifier the solution, which contains calcium ions, magnesium ions and undissolved magnesium compounds, is passed through a plurality of purification stages (ion exchange stages), which contain cation exchange granulate. In the fine purifier the solution having a pH value of about 10 to 11 is passed through a first ion exchange stage and the solution coming from the first ion exchange is acidified to decrease its pH value by at least 0.5. The solution is subsequently passed through at least one second ion exchange stage and a solution which is virtually free of undissolved magnesium compounds is withdrawn from the fine purification means. The acidified solution fed to the second ion exchange stage has preferably a pH value of 5 to 10.
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Chem. Abstracts 98:181961f.
Chem. Abstracts 98:37057y.
Chem. Abstracts 105:155577d.
Dworak Rainer
Lohrberg Karl
Dubno Herbert
Metallgesellschaft Aktiengesellschaft
Morris Theodore
Myers Jonathan
Squillante Edward
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