A dbc-oxalic acid chemical system for gold extraction purification

Through the synergistic effect of the DBC-oxalic acid chemical system, the highly selective extraction, separation and reduction of gold are integrated, solving the problem of independent DBC extraction and oxalic acid reduction in existing technologies, and achieving efficient separation and environmentally friendly gold purification.

CN122168885APending Publication Date: 2026-06-09CHIFENG YUNTONG NON FERROUS METAL CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHIFENG YUNTONG NON FERROUS METAL CO LTD
Filing Date
2026-01-19
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, DBC extraction and oxalic acid reduction are usually treated as two independent systems, lacking synergy and making it difficult to achieve highly selective extraction and separation of gold and its reduction in an integrated manner.

Method used

A DBC-oxalic acid chemical system was developed, comprising an extraction component and a reducing component, which achieves highly selective extraction and reduction of gold through synergistic effects. The extraction component includes dibutylcarbidol, hydrochloric acid balancer, diluent, and phase modifier, while the reducing component includes oxalic acid, pH adjuster, seed crystal inducer, and surfactant.

Benefits of technology

It achieves efficient separation of gold from impurities such as silver, copper, and iron. The oxalic acid reduction products are harmless CO2 and H2O. DBC has good chemical stability, can be recycled, and the system performance is adjustable.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

This invention discloses a DBC-oxalic acid chemical system for gold extraction and purification, belonging to the field of precious metal purification technology. The chemical system includes an extraction component and a reducing component: the extraction component includes the extractant dibutylcarbidol, a hydrochloric acid balancing agent, and optional diluents and phase modifiers; the reducing component includes the reducing agent oxalic acid, a pH adjuster, and optional seeding agents and surfactants. Through the synergistic effect of the extraction and reducing components, the chemical system of this invention achieves integrated selective separation and reduction of gold by utilizing the high selective extraction capability of DBC for Au(III) and the dual function of oxalic acid as both an extraction agent and a reducing agent. The separation coefficient Ξ²Au / Ag of this system is >10. 5 Ξ²Au / Cu>10 4 The extracted components can be recycled more than 50 times, and the oxalic acid reduction products are CO2 and H2O, which is environmentally friendly.
Need to check novelty before this filing date? Find Prior Art