The process involves NaCl solution leaching,crystallization of PbCl_2,conversion from PbCl_2 to PbSO_4,synthesis of 3PbO·PbSO_4·H_2O from PbSO_4.The experiment products met the specification of HG2340-92 in terms of its first class tribasic lead sulfate.
The results show that to add phosphoric acid or phosphate, Cd2+ion, sulphate of alkali metal, organic complex is effective on fining crystal of lead sulphate,improving utilization of active material, degrading evolution of hydrogen, inhibiting decomposi-tion of H2O, and promoting solution of lead sulphate.
The experimental results show that the lead sulphate, which is formed by reducing lead dioxide, can be reoxidized to lead dioxide within 1 min at 1.4V. This is due to the fact that this kind of lead sulphate is at the surface layers of the lead sulphate grains in the anodic film.
This article defined the analysing conditions of precipitating foreign substances rapidly by lead sulphate and strontium sulphate, and of that when pH = 5. 5, Lead and SXO form red coordination,and determined at λ = 540nm. This Method has a better accuracy and a better stableness. It is covement and save time, and it is fit for the production of copper alloy when lead content is at about 0. 003 % ￣0. 22%.
The electroreduction of PbSO4 film formed on Pb in 4.5mol·dm -3 H2SO4 at -0.6V (vs. Hg/ Hg2SO4/ 4.5mol·dm-3H2SO4) for 20 min has been studied using linear sweep voltammetry, chronoamperometry, in conjunction with AC impedance method.
The formation of lead sulfate in the active-material grains during discharge of a lead-acid battery is considered under the assumption that the grain size is not constant.
The lead sulfate formation during discharge of the negative electrode in a lead-acid battery working in an activation mode, i.e.
Methodics of precipitation processes on lead sulfate system in aqueous medium
Daily amounts of 6.0-43.75 mg of lead acetate, lead nitrate, lead chromate, lead chloride, lead carbonate or lead sulfate were given on 4 consecutive days; on day 2 each animal received 100 mg/kg phenobarbital i.p.
Solid-liquid extraction of trace impurities from potassium and lead nitrates and from lead sulfate