Preparation method of cesium sulfate and rubidium sulfate

Abstract

The invention relates to the technical field of mineral extraction, in particular to a preparation method of cesium sulfate and rubidium sulfate. A traditional cesium sulfate extraction method is improved, cesium is extracted from lithium-precipitation waste residue firstly by taking t-BAMBP and 260# solvent oil with the specific ratio as extraction solutions and through a multistage extraction technology, a cesium sulfate pure product is obtained, and the product purity reaches up to 99.9% or above; and then rubidium and potassium can be separated from raffinate of cesium extraction by adopting the t-BAMBP and n-hexane with the specific ratio as extraction solutions, the high-purity rubidium sulfate is obtained, and the purity can reach up to 99.9% or above. The preparation process involves a few types of organic solvents, and waste liquid is treated, recycled and reused advantageously.

Description

technical field

[0001] The invention relates to the technical field of mineral extraction, in particular to a preparation method of cesium sulfate and rubidium sulfate. Background technique

[0002] Due to its unique properties, rubidium and cesium play an important role in many high-tech fields such as aerospace, atomic energy, biology and energy. Its application and development have attracted more and more attention. hotspots.

[0003] Rubidium and cesium usually exist in other minerals, and often coexist with lithium, potassium and other metal elements. Lepidolite is rich in lithium, potassium, rubidium, cesium and other elements. When lepidolite is treated with sulfuric acid, mixed alum by-products containing rubidium, cesium, and potassium can be obtained. Domestic manufacturers of lithium salts that use lepidolite as raw materials often ignore the extraction of rubidium and cesium salts when extracting lithium, and the resulting rubidium-containing , Cesium by-produ...