Method for recycling rhenium and bismuth from acidic waste solution

Abstract

The invention provides a method for recycling rhenium and bismuth from an acidic waste solution. The method comprises the following steps that firstly, ion exchange adsorption treatment is conducted on the acidic waste solution through ion exchange resin, and the rhenium and the bismuth in the acidic waste solution are adsorbed to the ion exchange resin; secondly, a mixed solution of sodium hydroxide and tartaric acid is utilized for desorbing the bismuth adsorbed to the ion exchange resin to a liquid phase, bismuth-containing desorption liquid is obtained, the rhenium adsorbed to the ion exchange resin is desorbed to the liquid phase through an ammonium thiocyanate solution, and rhenium-containing desorption liquid is obtained; and thirdly, concentrated hydrochloric acid is dripped into the bismuth-containing desorption liquid to enable the bismuth to be subjected to the precipitation reaction, bismuth enrichment slag is obtained, after heating and concentrating are conducted on the rhenium-containing desorption liquid, crystallization treatment is conducted, and ammonium perrhenate is obtained. According to the method, the rhenium and the bismuth in the acidic waste solution can be efficiently separated and recycled, the separation effect is obvious, the technology is simple and feasible, the equipment investment is small, and industrial application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of wet separation and recovery of rare and precious metals, and in particular relates to a method for recovering rhenium and bismuth from acid waste liquid. Background technique [0002] Rhenium has excellent physical and chemical properties, and is widely used in platinum-rhenium reforming catalysts for petroleum refining to produce gasoline, nickel-based high-temperature superalloys in the aerospace industry, molybdenum-rhenium or tungsten-rhenium structural materials in the electronics industry, and military industries High temperature rhenium coating and other fields. In 2012, the global consumption of rhenium was 69t, the proportion of consumption in the aerospace field was as high as 65%, and the consumption proportion of platinum-rhenium catalyst was 22%. These two fields dominated the consumption market of rhenium. Bismuth is the metal with the strongest diamagnetism. It has low thermal conductivity...

AI Technical Summary

Problems solved by technology

Although this process realizes the separation and recovery of rhenium and bismuth, the separation effect of rhenium and bismuth is not good and the process is complicated and lengthy, the equipment requirements are high, and the production cost is high, making it difficult to popularize and apply in industry