The wetcake leaving the reactor centrifuge is conveyed to the resin neutralizer, a jacketed reactor in which the hydrochloric acid is neutralized with a weak base, sodium bicarbonate: 

The wetcake enters the neutralizer at 60°C. A stream consisting of a 10.0 wt% aqueous NaHCO₃ solution at 21°C coming from the NaHCO₃ feed drum is diluted with water at 60°C, and the combined stream is fed to the resin neutralizer. The product slurry leaving the neutralizer contains 15.0 wt% CPVC and has a pH of 7.0. Steam circulated through the neutralizer jacket keeps the contents at 90°C. Carbon dioxide is essentially insoluble in aqueous sodium chloride at this temperature, so that all of the CO₂ formed in the reaction may be assumed to be released from the neutralizer as a gas. Calculate the mass flow rates of the 10 wt% bicarbonate solution and the dilution water fed to the neutralizer, the mass flow rates of the CPVC slurry and the carbon dioxide stream leaving the neutralizer, and the mass fraction of NaCl in the product slurry liquid.

Transcribed Image Text:

HC1(aq) + NaHCO3(aq) NaCl(aq) + CO(g) + HO(1)