Abstract

ROJAS-VARGAS, Armando  and  TRUJILLO-NIEVES, María Elena. Measuring the pH During the Distillation Product of the Process Liquored. Part (III). RTQ [online]. 2012, vol.32, n.2, pp. 210-222. ISSN 2224-6185.

The importance of pH mensuration during product liquor distillation coming from ammonium carbonates leaching of nickel W_as studied. The evaluation W_as carried out in a column of industrial distillation, operated by means of Supervisory Control and Data Acquisition EROS. The range of fed liquor W_as 25 m³/h and of temperature at the top, 10 ºC. The ammonia concentration W_as variable, as well as dioxide of carbon, sulfur and nickel of the fed liquor. The concentration of ammonia possesses a potential dependence of the pH in the unload of the column and the nickel, polynomial of second order. The pH of the discharge pulp W_as determined for which the cost is minimum as for consumption of reagent of nickel precipitation and losses of ammonia, recommending a range among 8,10 d≤ pH d≤ 8,30 with a minimum loss of 0,111 C.U.C./(m³/h) and a saving of 0,674 C.U.C./(m³/h). An increase of the concentration of sulphur in the fed liquor, increases the dissolution of the nickel and of the expenses of operation. An equation W_as obtained to predict of the nickel concentration in the effluent of the distillation in dependence of sulfur concentration in the fed liquor and the pH in the discharge of the column.

Keywords : ammonium; nickel; distillation.

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