Method for separating salt from naturally occurring salt

Details Method for separating salt from naturally occurring salt Method for separating salt from naturally occurring salt

C - Chemistry, Metallurgy

01

D

C01D 3/16 (2006.01) C01D 3/08 (2006.01)

Patent

CA 2053932

ABSTRACT OF THE DISCLOSURE Disclosed herein is a method for separating salt from naturally occurring salt (rock salt or solar salt) which comprises a first separating step of dissolving naturally occurring salt in water, adding to the aqueous solution a strong acid containing sulfate ions, thereby adjusting it to low pH, adding to the aqueous solution an alkaline agent, thereby adjusting it to high pH and forming precip- itates, separating the precipitates from the remaining aqueous solution, and a second separating step of con- centrating the remaining aqueous solution, cooling the concentrate, thereby forming precipitates, and separating the precipitates form the aqueous solution. - 12 -

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