Synergistic extraction system for recovering and extracting platinum through extraction method

Abstract

The invention discloses a synergistic extraction system for recovering and extracting platinum based on a solvent extraction method, belonging to the technical field of resource recovery. The method for recovering and extracting platinum is characterized by comprising the steps of forming the synergistic extraction system by adopting tributyl phosphate (TBP) as an extracting agent, 2-methoxy-phenylthiourea as a synergistic extraction solvent and isoamyl alcohol as a diluting agent; adding a 2-methoxy-phenylthiourea-hydrochloric acid solution into a feed liquid containing platinum, adjusting the acidity namely H<+> concentration to 3-5mol / L, putting the mixture in a thermostatic water bath of 30-45 DEG C for 2-4 minutes, and cooling to obtain an extraction water phase of which the platinum concentration is 0.01-5 microgram / ml; measuring quantified TBP, diluting the quantified TBP into a liquid with the concentration of 0.5-2mol / L by using isoamyl alcohol, and taking the liquid as an organic phase for extraction; and adding the organic phase and a water phase feed liquid into a separating funnel according to a volume ratio of 1:1-1:10, then oscillating for 30s to 2min, then taking the mixture out, standing for liquid separation, and performing reverse extraction on the organic phase after liquid separation. By adopting the synergistic extraction system disclosed by the invention, the cost and pollution are reduced while the extraction efficiency of platinum is improved, so that an efficient, economic and environment-friendly effect is achieved.

Description

technical field [0001] The invention relates to a solvent extraction system for recovery and extraction of platinum, which uses cooperative extraction to recover platinum and belongs to the technical field of resource recovery. Background technique [0002] With the development of the economy and the progress of the society, people's demand for the precious metal platinum is increasing. my country is the world's largest consumer of platinum resources. The supply is mainly solved by imports, which highlights the insufficient guarantee of platinum resources in my country. [0003] Platinum group metals are scarce in the earth's crust, and the grades of platinum group metals in secondary resources are higher than those of primary platinum ores. Recovery of platinum from secondary resources could make up some of the short supply. With the development of various fields, the secondary resources containing platinum are also increasing. How to properly and effectively dispose of p...

AI Technical Summary

Problems solved by technology

[0008] (1) The cost of co-extraction solvent used is relatively high, the toxicity is relatively high, and it has a great impact on the human body and the environment in the solution preparation and the digestion reaction of the raffinate;

[0009] (2) When the co-extraction solvent and platinum concentration are high, the turbid liquid phenomenon is serious, even in a precipitated state, which is not conducive to liquid-liquid extraction, and has certain limitations on the platinum concentration in the feed liquid;

[0010] (3) The phase separation speed of the diluent used is relatively slow at the end of the extraction, which affects the extraction efficiency