40 results about "Cesium sulfate" patented technology

The invention provides a method for preparing aluminum cesium sulfate and aluminum rubidium sulfate by using tantalum-niobium tailings lepidolite, which is characterized by comprising the steps of: smashing lepidolite powder into about 100 to 200 meshes; putting the lepidolite powder and a sulfuric acid solution with a concentration of 30 to 70 percent according to a solid-liquid mass ratio of 1:(2-8) into a reaction device; reacting for 3 to 10 hours at 60 to 200 DEG C to remove fluorine and obtain a sulfuric acid solution containing Li<+>, separating and removing a fluorine containing solution; filtering and separating the sulfuric acid solution containing Li<+>, washing filter residue with water fully to remove the filter residue and obtain filtrate which is mother solution 1; and changing the temperature of the mother solution 1 to 10 to 100 DEG C under stirring in order to separate solid aluminum cesium sulfate and solid aluminum rubidium sulfate.

The invention relates to a method for dissolving out to extract lithium from defluorinated lepidolite in a pipeline. The method comprises the following steps: blending defluorinated lepidolite ore powder, sulfate of alkaline metal or alkaline earth metal, an additive and water according to the ratio to obtain slurry; after pre-heating the paste through a pre-heater, directly conveying the slurry into a pipeline reactor by utilizing a pump and carrying out high-temperature and high-pressure dissolving-out reaction; after reacting, cooling and recycling heat; carrying out solid-liquid separationon the slurry and washing; concentrating filtrate and removing impurities; adding sodium carbonate lithium-settling crystals to obtain a lithium salt product; circulating a lithium-settling mother solution until ingredients are blended to form slurry or sodium separation is carried out; then recycling potassium sulfate, rubidium sulfate and cesium sulfate. The method provided by the invention hasa simple system structure; compared with other lepidolite dissolving-out and lithium extraction technologies, the pipeline reactor is not provided with a mechanical stirring device and high pressureis easy to realize; the method has the advantages of less investment, low cost, small energy consumption and capability of comprehensively utilizing reaction dreg. The method is green and environmentally friendly, has high economic benefits and has an industrial production and application prospect.

The invention relates to a method for producing potassium sulfate by utilizing insoluble rocks containing potassium. The technological process comprises the following steps: (1) pretreating the insoluble rocks containing potassium; (2) treating the insoluble rocks containing potassium by use of ammonium fluoride; (3) filtering a product treated with the ammonium fluoride; (4) performing acidolysis on the product obtained after treatment based on ammonium fluoride; (5) dissolving the product obtained after treatment based on sulfuric acid in water; (6) performing fractional precipitation by regulating the pH (Potential Of Hydrogen) so as to obtain a potassium sulfate solution; (7) regenerating and recycling an ammonium fluoride solution. Potash feldspars K(AlSi3O8) are mainly taken as the rocks containing potassium. Rubidium feldspars and cesium feldspars, which are utilized to replace the potash feldspars, are used for producing rubidium sulfate and cesium sulfate by utilizing the process and the process condition which are provided by the invention. The insoluble rocks containing potassium are converted into acid-soluble solids by use of ammonium fluoride, so that the potassium sulfate is obtained after the acid-soluble solids are acidified by the sulfuric acid; meanwhile, other elements in the rocks are effectively utilized. The ammonium fluoride is recycled in the whole technological process. The technological process is low in temperature, easy to control and high in reaction yield.

The invention relates to the technical field of a preparation method of cesium carbonate and in particular relates to a method for preparing cesium carbonate by an ion exchange method. The method is applicable to preparation of high-purity pollution-free cesium carbonate. The method comprises the following steps of: performing acid leaching, jarosite precipitation, recrystallization and conversion on pollucite to obtain a conversion solution of cesium sulfate; exchanging by using 201*7 strongly alkaline styrene anion exchange resin to obtain a cesium hydroxide solution; and introducing carbon dioxide into the cesium hydroxide solution and neutralizing to prepare a caesium bicarbonate solution; and concentrating, crystallizing, separating and drying to obtain the cesium carbonate finished product. The obtained product is high in purity, simple in process flow, economic and environment-friendly, and suitable for industrialized production; and the process adopting the anion exchange resin is simpler than the process adopting cation exchange resin and elution is avoided, so cesium loss in an eluting process is avoided, the system yield is increased, and the system yield after a mother liquid participates in circulation can reach 92 to 95 percent.

The invention discloses a formula and preparation method of a ferrite permanent magnetic material. The ferrite permanent magnetic material comprises, by weight, 60 to 80% of iron oxide red, 10 to 15%of barium carbonate, 5 to 10% of silica, 3 to 8% of calcium carbonate, 5 to 10% of cesium sulfate, 15 to 20% of titanium dioxide and 5 to 10% of a rust remover. Through use of calcium carbonate, the solid-phase reaction is promoted, the product sintering temperature is reduced and the density of the product is improved. Through use of cesium sulfate, the anisotropic orientation of the ferrite is obviously improved, the crystal grain growth is inhibited and coercivity is improved. Through use of the titanium dioxide and rust remover, removal of rust on the surface of the ferrite permanent magnetic material is promoted and the influence of rust on magnetic properties is prevented.

The invention discloses a difluoro antimony cesium sulfate nonlinear optical crystal and a preparation method and application thereof. A room-temperature solution method is adopted for preparing the difluoro antimony cesium sulfate nonlinear optical crystal, wherein the molecular formula of the crystal belonging to an orthorhombic system is CsSbSO4F2, the molecular weight is 388.72, and the spacegroup is Pna21; the cell parameters include: a=9.9051(5) , b=11.6070(8) , c=5.2822(3) , and V=607.29(6) <3>; the nonlinear optical effect of the crystal is about 0.65KDP, the ultraviolet cut-off side is 233nm, and high rate in penetration of visible light and near infrared band is achieved. The CsSbSO4F2 crystal is transparent and free of inclusion and has advantages of high growth speed, lowcost, stable physicochemical properties, high mechanical performances, easiness in processing and the like, and the crystal is suitable for manufacturing of nonlinear optical devices such as frequencymultipliers, secondary harmonic generators, up-down frequency converters, optical parameter oscillators, laser blinding weapons, laser discs, laser projection televisions and optical computation andoptical fiber communication devices.

A resist film is first formed on a substrate. Subsequently, a barrier film including a basic compound of, for example, dicyclohexylamine is formed on the resist film. Thereafter, with an immersion liquid including cesium sulfate provided on the barrier film, pattern exposure is carried out by selectively irradiating the resist film with exposing light through the barrier film. Then, after removing the barrier film, the resist film having been subjected to the pattern exposure is developed, so as to form a resist pattern in a good shape.

The invention discloses a Cs2Mg3(SO4)4 non-linear optical crystal as well as a preparation method and application thereof. The preparation method comprises the following step: by taking Cs2SO4 and Mg-containing sulfate as raw materials, sintering so as to obtain a Cs2Mg3(SO4)4 microcrystal; or mixing and melting Cs2SO4 and Mg-containing sulfate, thereby obtaining the Cs2Mg3(SO4)4 non-linear optical crystal. The Cs2Mg3(SO4)4 disclosed by the invention belongs to an orthorhombic system P212121 space group, a MgO6 polyhedron and a SO4 tetrahedron in the structure are in co-top point connection toform a three-dimensional frame, and in addition, frame pores are filled with Cs<+> ions. By adopting the crystal, a pure phase and a single crystal of Cs2Mg3(SO4)4 are obtained, the synthesis methodis simple, the yield is high, and the crystal has a short ultraviolet cut-off side, a moderate frequency doubling conversion efficiency and good growth habits, and can be applied to non-linear opticaldevices such as frequency conversion, optical parameter oscillation, electro-optical modulation and communication.

A method to produce a brine from mixed alum salts, the method comprising the steps of: (i) Dissolving or pulping alum salts (1) containing rubidium alum, cesium alum and/or potassium alum in water or a recycled liquor and adding a neutralising agent to precipitate (20) aluminium as aluminium hydroxide and some sulfate; (ii) Passing the product of step (i) to a solid liquid separation stage (21) to remove precipitated solids (5) from step (i); (iii) A decant or filtrate (6) from step (ii) is passed to a solvent extraction stage (24-27) whereby any contained cesium and rubidium is selectively extracted into the organic phase to form a loaded organic solution (16); (iv) Contacting the loaded organic solution (16) of step (iii) with a scrub solution (17), which is at a pH lower than the extraction pH, to effectively scrub co-loaded potassium from the organic phase; (v) Contacting the scrubbed organic (19) of step (iv) with formic acid (20) to strip cesium and rubidium from the organic, the stripped cesium and rubidium forming a cesium and/or rubidium sulfate brine (21); and (vi) Recycling the stripped organic (22) of step (v) to the extraction stage (24-27).

The invention discloses a method for preparing battery-grade lithium carbonate by using lepidolite as a raw material. The method comprises the following steps: carrying out solid-phase reaction on concentrated sulfuric acid and lepidolite at medium and low temperatures, and leaching with water to dissolve sulfuric acid alkali metal salt; respectively separating out aluminum rubidium cesium sulfate alum salt, aluminum potassium sulfate alum salt and the like in different temperature intervals by adopting a method of adding different crystallization inducers to continuously induce crystallization and remove impurities; adopting potassium hydroxide for neutralization, crystallization and impurity removal to obtain aluminum hydroxide and potassium sulfate, applying the aluminum hydroxide for neutralizing excessive sulfuric acid, and supplementing the potassium sulfate to obtain the aluminum potassium sulfate alum salt; and finally, reacting the obtained lithium hydroxide solution with carbon dioxide to prepare battery-grade lithium carbonate. According to the method, potassium hydroxide and aluminum hydroxide are used as neutralizing reagents and potassium sulfate is used as a crystallization impurity removal reagent, so that impurity ions such as calcium and magnesium are not introduced into the production process; and finally, the obtained lithium hydroxide solution reacts with carbon dioxide to prepare the battery-grade lithium carbonate, and a major breakthrough in the technology of preparing the battery-grade lithium carbonate from lepidolite through a one-step method is achieved.

The invention relates to the field of cosmetic glass bottles, and concretely relates to a green and environment-friendly high-strength cosmetic glass bottle. The bottle comprises a bottle body, a bottle opening is formed in one end of the bottle body, and a bottle cap is detachably connected to the bottle opening; the bottle body is made of green and environment-friendly high-strength glass; and the green and environment-friendly high-strength glass comprises, by mass, 100 parts of silicon dioxide, 20 to 30 parts of waste glass, 10 to 12 parts of aluminum oxide, 1 to 2 parts of cesium sulfateand 0.3 to 0.5 part of indium phosphide. The cosmetic glass bottle has the following advantages: the cosmetic glass bottle is not prone to damage due to impact, cosmetics can be frequently carried andare not prone to damage after colliding with one another in the carrying process, and the cosmetic glass bottle is deeply loved by consumers.

The invention relates to a method for extracting cesium and rubidium from lepidolite. According to the method for extracting cesium and rubidium from lepidolite, separation, enrichment, purification and recovery of rubidium and cesium are effectively achieved, and the resource utilization rate is high. As verified by tests, through treatment of lepidolite ore with the Rb2O content being about 1.0%and the Cs2O content being about 0.2% by the method, sulfate solutions with the Rb content being 12 g/L and the Cs content being 2 g/L respectively can be obtained through extraction, then cesium sulfate and rubidium sulfate with the purity being 98% or above are obtained through recovery, and the total recovery rate of cesium and rubidium is 80% or above.