Method of monitoring ph in caustic liquor wet oxidation

Details Method of monitoring ph in caustic liquor wet oxidation Method of monitoring ph in caustic liquor wet oxidation

C - Chemistry, Metallurgy

23

F

C23F 11/18 (2006.01) C02F 11/08 (2006.01)

Patent

CA 2090832

D.N. 2473 METHOD OF MONITORING PH IN CAUSTIC LIQUOR WET OXIDATION ABSTRACT A process is described for monitoring pH in caustic liquor wet oxidation systems. An offgas carbon dioxide baseline value is established for the operation system where oxidized liquid effluent is at pH 7 or above. Offgas carbon dioxide content deviating by a selected proportion above the baseline vale indicates a drop in liquid effluent pH to 7 or less. Sufficient alkalinity is added to the raw wastewater to bring the effluent pH to 7 or above and prevent excessive corrosion to the materials of construction of the nickel-based wet oxidation system.

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