Papers by Author: Bao Gui Zhang

Abstract: It is a method of preparing hypophosphorous acid with electrodialysis. It comprises Ti-PbO2 anode, an insoluble cathode and an aqueous solution of hypophosphite anions in six-compartment electrolytic cell. The direct current, through the insoluble anode to cathode in electrical contact with the aqueous solution to generate H+, forms hypophosphorous acid solution. In this paper, the best term of different factors about the experiment was studied. The best condition was to keep the NaH2PO2 concentration between 300 and 500g/L, current value 3.0A, reaction time 12-18 h. The process is simple, low cost and highly efficient, which is a cleaner production without waste residue and waste water.

Abstract: The hypophosphorous acid was achieved with the electrodialysis, which comprises a Ti-PbO2 anode, a stainless steel cathode and an aqueous solution of sodium hypophosphite. The process of producing hypophosphorous acid was studied. Some factors, such as anodic voltage, product concentration and current efficiency were conducted. The results showed that, six-compartment electrodialytic cell could be used to improve the hypophosphorous acid content and purity. The Ti-PbO2 electrode was optimal anode material to cut down the cost of production. The process was simple, low cost and high efficient, and it was a cleaner production without waste residue and waste water.