Abstract
This paper describes the application of an anode-support system (AS) and a cationic permselective membrane to the electrolytic production of yellow lead chromate pigment and sodium hydroxide solution in a two-compartment cell. The authors have determined that it is possible to utilize in the process an AISI-316 stainless steel or a titanium mesh basket loaded with lead granules. Under the operating conditions used both the AISI-316 stainless steel and the titanium remain passive and act only as electrical contact between the lead anodic pieces and the external current source. A Nafion® 901 bimembrane (Dupont, USA) is utilized to separate both compartments. Good quality yellow lead chromate and sodium hydroxide solution (50–150 g dm−3) are obtained, with a power requirement of 0.41 kWh (kg PbCrO4)−1.
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