2,3-Dihydroxybutanedioic Acid → Lead oxide sulfate (Pb4O3(SO4))

Participants

Reaction Steps

A 2-liter beaker was charged with 1175.6 ml of the lead monoxide slurry A-3 (containing 0.587 g of PbOn) and 0.7 g of powdery tartaric acid was added to the slurry under agitation with a glass vane (pH=9.7). The mixture was heated and when the temperature was elevated to about 70° C., 26.22 ml of sulfuric acid having a concentration of 3.86 mole/l was promptly added to the slurry in about 10 seconds (the pH value was 5.7 at the initial stage of addition). The temperature was maintained at 65° to 70° C. while heating the slurry on a heater under agitation, and in this state, aging was carried out for 60 minutes to obtain a base slurry of tribasic lead sulfate having a pH value of 8.4.

Provenance & Evidence