Process for maintaining a low sodium chloride content in...

Details Process for maintaining a low sodium chloride content in... Process for maintaining a low sodium chloride content in...

D - Textiles, Paper

21

C

9/36

D21C 11/00 (2006.01)

Patent

CA 1097464

16-204 PROCESS FOR MAINTAINING A LOW SODIUM CHLORIDE CONTENT IN RECYCLED SODIUM CHEMICALS OF SODIUM-BED PULP MANUFACTURING PROCESSES ABSTRACT OF THE DISCLOSURE process is provided for the separation of sodium chloride in the sodium chemicals recovery stage of sodium-based pulp manufacturing processes so as to maintain a low sodium chloride content in the recycled sodium chemicals, comprising the steps of treating an aqueous sodium chloride- containing solution with carbon dioxide gas, thereby forming a saturated sodium bicarbonate solution; precipitating sodium values of the solution as sodium bicarbonate while retaining sodium chloride in solution separating such sodium bicarbonate; withdrawing the residual aqueous sodium chloride- containing solution from the process; and recycling the separated sodium bicarbonate.

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