Process for producing low aluminum membrane cell feedbrine

Details Process for producing low aluminum membrane cell feedbrine Process for producing low aluminum membrane cell feedbrine

1989-02-24

1990-10-30

Russel, Jeffrey E.

Chemistry of inorganic compounds

Halogen or compound thereof

Binary compound containing metal

210726, 210754, C01D 300, C01D 316

Patent

active

049667645

ABSTRACT:
A process for controlling the concentration of aluminum in the brine of a membrane chlor-alkali cell is disclosed wherein the brine has its calcium carbonate settler solids digested in the calcium chloride flow stream by the addition of an inorganic mineral acid to bring the pH to about 2.0 to about 3.0 to solubilize the aluminum in the brine. The brine has the pH adjusted upwardly to reprecipitate the aluminum onto carrier particles and then removes the reprecipitated aluminum and carrier particles from the brine by filtration or centrifugation.

REFERENCES:
patent: 2764472 (1956-09-01), Cady et al.
patent: 2982608 (1961-05-01), Clement
patent: 3798160 (1974-03-01), Huffman
patent: 4155819 (1979-05-01), Carlin
patent: 4336232 (1982-06-01), Moritz

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