4 results about "Rubidium sulfate" patented technology

The invention discloses a method for directly extracting lithium by carbon-assisted sulfating roasting of lepidolite, which comprises the following steps: 1) mixing lepidolite, concentrated sulfuric acid and water, and uniformly stirring to obtain slurry; 2) adding an iron source and a carbon source into the slurry, and uniformly stirring to obtain a mixed material; 3) roasting the mixed material to obtain roasted clinker; (4) the roasted clinker is subjected to a water leaching reaction, and water leaching liquid and water leaching residues are obtained after filtering; and (5) the water leaching residues obtained in the step (4) are subjected to an alkaline leaching reaction, and a Na2SiO3 solution and Fe / Al multi-element oxide residues are obtained after filtering. By introducing carbon and iron oxide to assist sulfating roasting of lepidolite, the decomposition temperature of iron-aluminum sulfate is greatly reduced, and meanwhile it is ensured that lithium-potassium-rubidium sulfate is not decomposed. According to the method, the selective leaching rate of valuable metal is remarkably increased, generation of silicate is inhibited, the roasting slag is converted into Fe / Al oxide and SiO2 with utilization value, efficient lithium extraction and comprehensive utilization of resources are achieved, operability is enhanced, and application and popularization are easy.

This application provides a method for preparing a rubidium salt-modified sulfur dioxide oxidation catalyst, comprising the following steps: S1, providing diatomaceous earth, silica, sodium sulfate, a forming agent, vanadium pentoxide, caustic alkali, silicate, and rubidium sulfate; S2, adding vanadium pentoxide and rubidium sulfate to an aqueous solution of caustic alkali, whereby vanadium pentoxide dissolves under alkaline conditions to form a soluble vanadate or metavanadate complex system, followed by adding an aqueous sulfuric acid solution to adjust the pH value, ensuring the vanadate system remains stable in the solution, and then adding silicate to obtain a first solution; S3, mixing diatomaceous earth, silica, sodium sulfate, and the forming agent uniformly to obtain a dry base material, adding it to the first solution and mixing, then kneading, shaping, drying, and calcining to obtain the finished catalyst. This application can improve the activity of vanadium catalysts at low temperatures and enhance the catalyst strength.

The application provides a method for preparing high-purity lithium hydroxide monohydrate and recycling rubidium and cesium, comprising the following steps: (1) mixing, ball-milling and roasting lithium ore, a sulfate and an additive at high temperature to obtain clinker; (2) crushing and grinding the clinker in step (1) and using water to obtain a leaching solution; (3) adding the leaching solution in step (2) into a three-chamber electrolytic cell for constant-current electrolysis to obtain an anode liquid, an intermediate liquid and a cathode liquid; (4) obtaining sulfuric acid from the anode liquid, evaporating and concentrating the intermediate liquid, step-by-step cooling and crystallization to obtain rubidium sulfate, cesium sulfate and sodium-potassium sulfate for roasting in step (1), and evaporating and concentrating the cathode liquid to obtain high-purity lithium hydroxide monohydrate. The high-purity lithium hydroxide monohydrate can be obtained through high selectivity of lithium ion solid-state electrolyte thin film to lithium, the utilization rate of potassium, rubidium and cesium is improved, the whole process is green and environmentally friendly, the comprehensive utilization rate of lithium ore is improved, and the product value is high.

The invention discloses a resource utilization method of potassium, aluminum, sulfur, rubidium and cesium, which can efficiently recover aluminum, potassium and rubidium sulfate resources and is used for producing lithium carbonate from lithium ores, and the method comprises the following steps: carrying out dehydration treatment and high-temperature roasting treatment on a byproduct alum to obtain a roasted material and acid gas; performing multi-stage absorption on the acid gas to prepare a first sulfuric acid solution and a second sulfuric acid solution; adding the roasted material into water, stirring and dissolving, and carrying out solid-liquid separation to obtain crude aluminum oxide and potassium sulfate enriched liquid; freezing and crystallizing the potassium sulfate enriched liquid, and separating out potassium sulfate crystals and crystallization mother liquor containing rubidium and cesium; mixing the crystallization mother liquor with the lithium precipitation mother liquor to obtain rubidium and cesium enriched liquor; extracting the rubidium-cesium enriched liquid to obtain a cesium-containing organic phase and a rubidium-containing water phase; the cesium-containing organic phase is subjected to reverse extraction, and a cesium sulfate solution and an inactivation extraction agent are obtained; extracting the rubidium-containing water phase to obtain a rubidium-containing organic phase and raffinate; and the rubidium-containing organic phase is subjected to reverse extraction, and a rubidium sulfate solution and an inactivation extraction agent are obtained.