13 results about "Beryllium hydroxide" patented technology

This invention has an object to provide a method for producing a beryllium solution, the method being novel and having high energy efficiency. The method (M10) for producing a beryllium solution includes a main heating step (S13) of dielectrically heating an acidic solution containing a starting material so as to generate a beryllium solution, the starting material being beryllium or a substance containing beryllium.

The invention relates to the technical field of metal beryllium powder, in particular to a preparation process of high-purity micron-sized metal beryllium powder, which comprises the following steps: (1) obtaining beryllium hydroxide; (2) obtaining basic beryllium acetate; (3) obtaining high-purity basic beryllium acetate; (4) obtaining high-purity beryllium oxide; (5) forming a molten salt system; (6) adding high-purity beryllium oxide into the molten salt system, uniformly mixing, and electrolyzing under the protection of inert atmosphere to obtain high-purity micron-sized metal beryllium powder; according to the method, the high-purity metal beryllium powder with the particle size as low as micron can be obtained, is small in particle size and uniform in distribution, has high thermal conductivity and good electromagnetic performance, and can be used for manufacturing electronic elements and magnetic recording materials; the magnetic recording material prepared from the high-purity micron-sized metal beryllium powder has the advantages of high stability, clear image, high signal-to-noise ratio, small distortion and the like.

The application discloses a treatment method of wastewater in an extraction process of beryllium oxide, and adds precipitated wastewater obtained after production of beryllium hydroxide into raffinate obtained in the extraction process of beryllium oxide, and then performs neutralization and precipitation after adding an adjusting agent, so as to obtain wastewater residue and neutralized wastewater through filtration; the wastewater residue is modified and calcined at 800-1000 DEG C; calcined waste residue is obtained, and then the calcined waste residue is added into the same batch of raffinate, so as to obtain filtrate and waste residue through filtration; calcium hydroxide is added into the obtained neutralized wastewater, so as to obtain neutralized residue and treated wastewater. The method realizes low-cost treatment of the wastewater and recycling of resources, and greatly improves the recovery rate of beryllium.

The invention relates to a preparation method of high-purity ammonium fluoberyllate, which comprises the following steps: (S1) slowly adding hydrofluoric acid into turbid liquid of beryllium hydroxide under a stirring condition, continuously stirring when a system is in a transparent solution state, slowly adding ammonia water, and washing and drying precipitates to obtain a crude product; and (S2) preparing a mixed solvent of water, a water-miscible aprotic polar organic solvent and a hydrophilic ionic liquid, heating until the solution system is clear, adding the crude product into the mixed solvent, stirring to dissolve the crude product, quickly cooling to 2-6 DEG C, layering the ionic liquid and a water phase, discarding the ionic liquid phase, and filtering, washing and drying the precipitate of the water phase to obtain the water-soluble ionic liquid. A high-purity ammonium fluoberyllate product is obtained; the hydrophilic ionic liquid is imidazole metal halide with C4-6 alkyl groups. According to the method, the purity and the yield of the product ammonium fluoberyllate are improved at the same time, the purity is larger than or equal to 99.99%, and the yield can reach 80% or above.

The invention relates to the technical field of beryllium-containing wastewater treatment, in particular to a beryllium-containing wastewater circulation comprehensive utilization method and a reaction device.The beryllium-containing wastewater circulation comprehensive utilization method comprises the steps that S1, precipitation wastewater and beryllium washing wastewater are added into the reaction device; s2, sodium hydroxide is added into the wastewater, so that beryllium ions in the wastewater generate insoluble beryllium hydroxide precipitates; s3, filtering the beryllium hydroxide precipitate, and calcining to obtain a beryllium-containing finished product; s4, carrying out evaporation concentration and cooling crystallization on the residual wastewater in the step S3 to obtain ammonium sulfate-containing crystallized concentrated liquid and evaporated liquid water; and S5, putting the ammonium sulfate-containing crystallization concentrated liquid into a centrifugal machine, and carrying out centrifugal separation to obtain an ammonium sulfate crystal substance. Through periodic forward and reverse rotation of the rotating shaft II, beryllium hydroxide wastewater can be alternately filtered and discharged, so that the filtering efficiency can be improved, and ammonium sulfate, beryllium sulfate and water resources in the wastewater can be effectively recycled.

To provide a novel method for producing a beryllium solution, which has high energy efficiency.SOLUTION: A method (M10) for producing a beryllium liquid includes a main-heating step (S12) for producing the beryllium liquid by using beryllium and a material containing the beryllium as starting materials and dielectrically heating an acid liquid containing the starting materials.SELECTED DRAWING: Figure 1

The application discloses a method for high-selectivity recovery of beryllium from lithium smelting beryllium-containing clinker, and belongs to the technical field of beryllium-containing solid waste resource utilization. After the lithium smelting beryllium-containing clinker is crushed, slurry is prepared, and under the shearing action, concentrated acid is slowly added dropwise to the slurry to precisely control the pH of the slurry in the range of 3.0-3.5 to perform reaction. After the reaction is completed, solid-liquid separation is performed to obtain beryllium-containing filtrate. The beryllium-containing filtrate is subjected to precipitation by using a sodium hydroxide solution to precisely control the end-point pH of the beryllium-containing filtrate in the range of 8.5-9.0, and a composite precipitate containing beryllium hydroxide and potassium sodium cryolite is obtained. The method completely breaks the traditional situation of 'waste production waste', not only realizes efficient separation of the highly toxic beryllium, but also directly converts the beryllium-containing solid waste into 'rich beryllium potassium sodium cryolite composite concentrate' with a main phase of crystalline potassium sodium cryolite and a beryllium grade of more than 5.5%, realizing double high-value extraction of trace metals (beryllium) and bulk minerals (cryolite).

The invention belongs to the technical field of metal compound extraction, and particularly relates to a preparation method of a beta-type beryllium hydroxide crystal. According to the preparation method provided by the invention, a precipitation reaction does not need to be carried out under a high-temperature boiling condition, cyclic precipitation is carried out under a low-temperature condition, a product of a previous precipitation reaction is used as a seed crystal, and during a next precipitation reaction, because the solubility of micro crystals is larger than that of coarse-particle crystals, the micro crystals are promoted to be dissolved, and the solution concentration is increased; substances in the solution continue to be separated out on large-particle crystals, large crystal grains continuously grow up, finally coarse-particle crystals required by the industry are formed, the consumption of ammonia water is reduced by 70% or above, obtained alpha-type beryllium hydroxide precipitates are subjected to subsequent sodium hydroxide solution alkali washing and heat treatment, impurities are removed while post-crystal-form conversion is conducted, and beta-type beryllium hydroxide is obtained. According to the method, the harm of ammonia volatilization to operators is reduced, the energy consumption can be reduced, and the cost is saved.

This invention has an object to provide a method for producing a beryllium solution by dissolving beryllium oxide, the method being novel and having high energy efficiency. A production method (M10) for producing a beryllium solution includes a main heating step (S13) of dielectrically heating an acidic solution containing beryllium oxide to generate a beryllium solution.

The invention discloses a matrix matching method in beryllium chemical analysis and wet analysis, and belongs to the technical field of beryllium chemical analysis. The method comprises the following steps: determining a beryllium chemical analysis wet analysis method; extracting elements associated with the preparation of the standard working solution in the beryllium chemical analysis wet analysis method; beryllium hydroxide or beryllium hydroxide and a coexisting matrix are equivalently placed in a plurality of beakers, the beakers are wetted with secondary water, then dissolving acids of the same type and the same volume are added, and after the heating reaction is finished, a first mixed solution series is obtained; adding to-be-detected elements with corresponding content gradients into each first mixed solution in the first mixed solution series to obtain a second mixed solution series; respectively transferring each second mixed solution in the second mixed solution series into a corresponding volumetric flask and fixing the volume to obtain a third mixed solution series as a standard working solution series; and drawing a standard curve. High-purity beryllium is replaced with high-purity beryllium hydroxide, and the problem that high-purity beryllium is difficult to obtain is solved.

The invention discloses a method for deeply separating uranium and beryllium from a beryllium-iron-uranium coexisting solution based on ultrasonic waves, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: carrying out oxidation pretreatment on a beryllium-iron-uranium coexisting solution to obtain a pretreated solution; adjusting the pH value of the pretreatment solution to be more than 12, carrying out ultrasonic treatment, and filtering to obtain a beryllium-containing solution and uranium-iron coprecipitation slag; the uranium-iron co-precipitation slag is dissolved with a sodium carbonate solution, and a sodium uranyl tricarbonate solution and a ferric hydroxide slag phase are obtained. According to the method, uranium and beryllium can be thoroughly separated from the leaching solution containing iron, beryllium and uranium, products such as beryllium hydroxide, sodium uranyl tricarbonate and ferric hydroxide with high purity are obtained, and compared with an existing beryllium and uranium separation process achieved through two-time leaching, the process can be greatly simplified, and the cost is reduced.

The invention discloses a method for treating wastewater in a beryllium oxide extraction process by an extraction method, which comprises the following steps: adding precipitation wastewater obtained after beryllium hydroxide is produced into raffinate obtained in the beryllium oxide extraction process by the extraction method, adding a regulating reagent, neutralizing, precipitating and filtering to obtain wastewater slag and neutralized wastewater, and modifying and roasting the wastewater slag at 800-1000 DEG C; the method comprises the following steps: roasting waste residues to obtain roasted waste residues, then adding the roasted waste residues into raffinate of the same batch, filtering to obtain filtrate and waste residues, and adding calcium hydroxide into the obtained neutralized wastewater to obtain neutralized residues and treated wastewater. According to the method, low-cost treatment of the wastewater and recycling of resources are achieved, and the recycling rate of beryllium is greatly increased.

The invention discloses a method for green cooperative treatment of lithium slag, and relates to the technical field of slag treatment. The method comprises the following steps: mixing lithium slag and aluminum ash, and carrying out ball milling treatment to obtain a reaction precursor; the reaction precursor is subjected to a reduction reaction under the protective atmosphere and the negative pressure condition, and a solid product and flue gas containing beryllium, thallium and fluorine are generated; flue gas is subjected to condensation trapping, acid washing and alkali washing collection, and beryllium, thallium and fluorine are efficiently recycled; carrying out acid leaching on the condensed traps, then mixing an acid leaching solution with an acid pickling solution to obtain a mixed acid solution, adjusting the pH value, standing, and carrying out solid-liquid separation to obtain beryllium hydroxide solid and thallium-rich supernate; and adding a binder and water into the solid product to prepare spherical particles, drying, and carrying out solid-phase sintering to prepare the ceramsite. Gypsum and aluminum nitride are removed through a synergistic effect, harmless treatment of gypsum and aluminum nitride is achieved, calcium-aluminum-silicon resources are prepared into ceramsite, the ceramsite is applied to the field of building materials, the comprehensive utilization rate of two kinds of solid waste can be increased, and the environmental pressure can be relieved.