一种亚碲酸钠溶液电积提取碲的方法
By using composite additives in the alkaline sodium tellurite electrowinning process, the problems of anodic precipitation and cathode purity were solved, achieving efficient extraction and stable production of high-purity tellurium, and improving tellurium recovery rate and product purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG HUMON SMELTING
- Filing Date
- 2026-01-05
- Publication Date
- 2026-07-17
AI Technical Summary
The existing alkaline sodium tellurite electrowinning process suffers from severe sodium tellurite precipitation at the anode, limited purity of the cathode tellurite product, and low metal recovery rate, making it difficult to achieve efficient extraction of high-purity tellurite.
A composite additive consisting of sodium ascorbate, diethylenetriaminepentaacetic acid pentasodium, sodium citrate, and polyvinylpyrrolidone is used to inhibit oxidation reactions in the anodic region, chelate heavy metal impurity ions, and improve the cathode deposition morphology, thereby forming a stable electrodeposition environment.
It significantly improved the recovery rate and purity of tellurium, with the purity of cathode tellurium products reaching 99.95%, reduced anode passivation and cell pressure fluctuations, and improved production efficiency and continuity.