44 results about "Cesium compound" patented technology

The present disclosure relates to an insoluble cesium mixed multimetal oxide, ceramic, glass-ceramic or glass which is intended to be a replacement for cesium chloride or similar materials used as radiation sources. Additionally, this insoluble compound could replace other insoluble lower specific activity cesium compounds used in industrial, underwater, and underground / downhole application because it would allow the use of older lower specific activity cesium stock solutions. The disclosure further provides a method for the cesium to be recovered from cesium chloride sources.

The present invention provides a method of producing an optical element without the need for high vacuum, unlike the thin film deposition methods, and without using a molten salt. More specifically, the invention provides a method of producing an optical element comprising applying a paste containing at least one compound selected from lithium compounds, potassium compounds, rubidium compounds, cesium compounds, silver compounds, and thallium compounds, an organic resin, and an organic solvent to a glass substrate containing an alkali metal component as a glass component and then performing heat treatment at a temperature below the softening temperature of the glass substrate.

The invention discloses a wet-method vanadium catalyst and a preparation method thereof. The wet-method vanadium catalyst comprises the following raw material components: 3-5% of V2O5, 1-3% of thiosulfate, 1-5% of a caesium-containing compound, 1-3% of a surfactant, 2-5% of an organic high polymer compound, 1-3% of hydroxide, 5-10% of diluted acid, 0.1-1% of anhydrous sodium sulfate, 3-10% of phosphate, 0.1-2% of a nickel-containing compound, 1-3% of sulfur, 20-36% of concentrated sulfuric acid and the balance of kieselguhr crude ore, wherein the mass of the concentrated sulfuric acid is 0.9-1.1 times of the mass of kieselguhr crude ore; the mass sum of all raw material components is 100%; the mass concentration of the diluted sulfuric acid is 20-60%; the mass concentration of the concentrated sulfuric acid is not less than 80%; the surfactant is sodium dodecyl benzene sulfonate; the organic high polymer compound is polyacrylamide. The wet-method vanadium catalyst disclosed by the invention is low in initiation temperature and is solid and fast, and the anti-powdering properties and the water resistance of the wet-method vanadium catalyst are remarkably improved.

The invention relates to a nanometer vanadium catalyst for preparing sulfuric acid through oxidizing SO2 and a preparation method thereof. The nanometer vanadium catalyst which uses diatomite as a carrier to load V2O5 contains cesium oxide and lanthanum oxide, and raw materials of the nanometer vanadium catalyst comprise, by mass, 4-5.5% of V2O5, 0.01-5% of a cerium-containing compound, 1-3% of a thiosulfate, 1-10% of a cesium-containing compound, 0.01-5% of a lanthanum-containing compound, and 0.5-7% of a surfactant and an organic macromolecular compound. According to the finished nanometer vanadium catalyst, V2O5 is nanometer grade V2O5; the ignition temperature is 340-350DEG C; the operation temperature of the catalytic reaction is 360-370DEG C; and the SO2 volume concentration is 3-12%, the total conversion rate is equal to or greater than 99.7% and the SO2 emptying amount is equal to or less than 400mg / m<3> when the catalytic reaction adopts a 3+2 flow of a converter. The prepared catalyst has the advantages of low ignition temperature, high activity, high use stability, good compressive strength, and low abrasion.

The invention discloses a preparation method of high-purity metallic rubidium and cesium. The preparation method comprises the steps of (1) preheating and dehydrating rubidium and cesium compounds; (2) carrying out primary reduction to obtain metallic cesium and primary reduction residues; (3) carrying out primary rectification on metallic cesium in the inert atmosphere, so as to obtain a primaryrectification product and primary rectification residues, and carrying out secondary rectification on the primary rectification product in the inert atmosphere, so as to obtain high-purity metallic cesium and secondary rectification residues; (4) mixing the primary reduction residues, the primary rectification residues and the secondary rectification residues with a secondary reducing agent, and carrying out secondary reduction to obtain metallic cesium, metallic rubidium and secondary reduction residues; (5) carrying out vacuum distillation separation on metallic cesium and metallic rubidium,so as to obtain a vacuum distillation product and a distillation residual liquid; and (6) carrying out distillation on the vacuum distillation product in the inert atmosphere for two times, so as toobtain two-time distillation products and high-purity metallic rubidium. The method is particularly suitable for separating the mixed rubidium and cesium compounds in which rubidium and cesium are mixed together to recycle and obtain high-purity metallic rubidium and high-purity metallic cesium.