281results about How to "Improve the purification effect" patented technology

The invention provides a preparation method of a general flavone extract in abelmoschus manihot flowers, which comprises the following steps: A) crushing the abelmoschus manihot flowers, extracting with an alcohol solvent, filtering, and concentrating to obtain an extracting solution; b) purifying the extracting solution by adopting macroporous resin to obtain an eluent; and C) concentrating the eluent, and drying to obtain the traditional Chinese medicine composition. According to the method, diluted alcohol extraction and a high-speed homogenization-ultrasonic-assisted liquid phase extraction method (HSH-UAE) are adopted, so that the contact area of a solvent and the abelmoschus manihot flowers is increased, full contact of medicinal materials and the solvent is guaranteed, and flavonoid substances are dissolved more sufficiently, so that the extraction speed is increased, and the extraction efficiency is improved. Macroporous adsorption resin is selected for separation and purification, the purification effect is good, operation is easy, safety, no toxicity and no pollution are achieved, reuse can be achieved after slight treatment, and the production cost is effectively reduced. Compared with a traditional method, the method has the technical advantages that the extraction speed is high, the extraction yield is high, effective components are fully extracted and reserved, and the process is simple.

The invention discloses a purification method of a GLP-1 analogue crude peptide. The purification method comprises the following steps: treating a sample, preparing a mobile phase, carrying out purification balance, loading the sample, carrying out post-balance and eluting. The purification method aims at single impurities which are difficult to remove near a main peak, solves the problems of high purification difficulty, low recovery rate and high cost in the prior art, also has an obvious removal effect on front and rear impurities which are difficult to remove in crude stemeglutide or crude tilpoitide, reduces the purification difficulty, and has a great application prospect.

The invention discloses a high-activity TET dioxygenase mutant as well as a construction method and application thereof. The TET dioxygenase mutant is obtained from an amino acid sequence of wild type TET dioxygenase as shown in SEQ ID NO.1 according to any one of the following mutation modes: a, the 150th proline is mutated into alanine; and b, proline at the 150th site is mutated into alanine, and isoleucine at the 235th site is mutated into methionine. The TET dioxygenase mutant provided by the invention can be stabilized in an escherichia coli system, the purification effect is good, the preparation difficulty is reduced, and the activity is remarkably improved compared with that of a wild type. The methylation gene transformation effect is far better than that of a traditional bisulfite transformation method, and the method has a good application prospect.

The invention provides a composition for improving sleep quality as well as a preparation method and application thereof, and belongs to the technical field of medicines. The preparation method comprises the following steps: performing supercritical fluid extraction on lavender, violet, rose and agilawood to obtain extracted oil, performing solid enzymolysis, performing immobilized ionic liquid extraction, and performing desorption to obtain extracted oil, and uniformly mixing the extracted oil with the extracted oil and a penetration enhancer to obtain the composition for improving the sleep quality. The prepared extract oil and the extract oil are mixed, and the penetration enhancer is added, so that the prepared composition for improving the sleep quality enters a human body through skin absorption, achieves the effects of regulating qi activity of viscera and regulating yin and yang of the body, has the effects of soothing the nerves, helping sleep, prolonging the sleep time, improving the sleep effect and relieving nervous mood, and has a wide application prospect.

The utility model belongs to the technical field of separating devices, and particularly relates to a chemical rectifying tower which comprises a tower body, a gas outlet pipe arranged at the top end of the tower body, a liquid outlet pipe arranged at the bottom end of the tower body, a gas inlet pipe and a liquid inlet pipe arranged on two sides of the tower body respectively, a plurality of groups of tower trays arranged inside the tower body, and a group of connecting plates arranged below each group of tower trays in a matching manner, the diameter of the tower tray and the diameter of the connecting plate are matched with the inner diameter of the tower body, a plurality of groups of through holes are formed in the tower tray in a penetrating manner, a plurality of groups of connecting rods matched with the through holes are arranged on the top surface of the connecting plate, stop blocks are arranged at the top ends of the connecting rods, and a screw rod is rotationally arranged in the tower body and is in threaded connection with the connecting plate; a guide rod is fixedly arranged in the tower body, the tower tray is fixedly arranged on the guide rod through a bolt, and the bottom end of the screw rod and the bottom end of the guide rod are positioned below the connecting plate at the bottommost layer. According to the utility model, enough contact time of gas and liquid in the rectifying tower can be ensured, and the separation and purification effects of target substances are improved.

The invention relates to the field of preparation of silicon carbide micro powder, in particular to a preparation process of high-purity silicon carbide micro powder, which comprises the following steps: mixing silicon powder and carbon powder in proportion; the mixed raw materials generate silicon carbide in the heating chamber; cooling the silicon carbide; preliminarily grinding to obtain silicon carbide particles; purifying the silicon carbide particles; drying equipment is used for removing moisture in the silicon carbide particles, and the silicon carbide particles are finely ground into silicon carbide micro powder; judging the production quality according to the purity of the silicon carbide micro powder; and determining a corresponding mode for improving the purity of the silicon carbide according to the production quality. According to the method, the controllability of the purity of the prepared silicon carbide micro powder is improved through free carbon removal and acid pickling, and the production efficiency is improved.

The utility model relates to the technical field of medicine processing, in particular to a medicine purification device for biological medicine processing. Comprising an outer cylinder, and solves the problems that in the prior art, when medicines are purified, a purification cylinder is generally needed, but more residual materials are generally adhered to the interior of the purification cylinder after the medicines are purified, and if the residual materials in the purification cylinder are not cleaned, the cleanliness of the interior of the purification cylinder is greatly reduced; however, in the prior art, a purification barrel and an outer barrel in a purification device are generally fixed, so that a worker cannot effectively take out the purification barrel for cleaning treatment, and in the prior art, a stirring assembly is generally obliquely arranged in the purification barrel, so that cleaning of the interior of the purification barrel is also hindered. Therefore, the cleaning effect and efficiency of the purification barrel are reduced, and the effect of purifying other medicines by the purification barrel is influenced.

The invention discloses a pressure swing adsorption device of a hydrogen production system. The pressure swing adsorption device comprises a first adsorption tower, a second adsorption tower, a waste gas emission unit, a hydrogen input pipe, a hydrogen output pipe, a program control valve group and a PLC (Programmable Logic Controller) control system, according to the device, a plurality of adsorption layers are respectively arranged in the first adsorption tower and the second adsorption tower, and the pressure change of each adsorption tower in different adsorption and regeneration stages is controlled, so that the intelligent control of the pressure swing adsorption hydrogen production process is realized, and the first adsorption tower and the second adsorption tower alternately perform adsorption and regeneration; compared with the traditional two independent steps of deoxidation and drying, the method has the advantages that the influence on the purification effect of hydrogen due to flow connection is avoided, the hydrogen purification flow is efficiently integrated, and the purification effect and efficiency of hydrogen are improved; by controlling the opening and closing time and sequence of the program control valve group, when one adsorption tower performs adsorption operation, the other adsorption tower performs regeneration operation, so that the overall efficiency and yield of the system are improved.

The invention relates to a high-purity isopropanol purification method based on modified resin, which comprises the following steps: adding activated carbon into an isopropanol mixed solution, decolorizing the isopropanol mixed solution, carrying out primary impurity adsorption, and removing particulate matters and macromolecular impurities meeting activated carbon adsorption conditions in the isopropanol mixed solution. The method comprises the following steps: carrying out primary dehydration through a 4A molecular sieve, adding hydrogen-type strong-acid cation exchange resin and hydrogen-oxygen type strong-base anion exchange resin into an isopropanol mixed solution, and removing positive ions and negative ions in the isopropanol mixed solution; the macroporous alkalescence anion exchange resin of the styrene-divinylbenzene copolymer is added, so that the content of residual acid and alkali is lower than 10ppb. The ionic liquid is fixed on hydrogen type strong-acid cation exchange resin and hydrogen-oxygen type strong-base anion exchange resin, and alcohol, ketone and organic acid impurities are removed. And carrying out fractional rectification on the isopropanol mixed solution, and removing light and heavy components to obtain isopropanol with the purity not lower than 99.999%.

The food safety detection equipment disclosed by the invention comprises a sampling mechanism, a multi-station turntable device, a centrifugal device, a conveying mechanism, a detection device, a reagent adding device and an extraction mechanism. The sampling mechanism is provided with a sampling table; the multi-station turntable device is provided with a first containing part; the centrifugal device comprises a rotating frame and a first driving mechanism, and the rotating frame is provided with a second containing part; the first conveying mechanism is used for transferring the sample containers among the sampling mechanism, the multi-station turntable device and the centrifugal device; the detection device is provided with a third containing part, a fourth containing part, a first image acquisition device and a second image acquisition device; the reagent adding device is used for adding reagents to form a first sample and a second sample; the extraction mechanism comprises a manipulator and a pipette and is used for extracting the first sample and the second sample. The device has the advantages of high automation degree, good soaking and purifying effects, high detection precision and integration of multiple detection means.

The invention belongs to the field of composite materials, and particularly relates to super-hydrophobic MOF-based polyurethane sponge added with a green inorganic flame retardant and used for oil-water separation and a preparation method of the super-hydrophobic MOF-based polyurethane sponge. The preparation method comprises the following steps: firstly, preparing Ni-MOF by adopting a solvothermal method, then respectively grafting the Ni-MOF and Mg (OH) 2 / Al (OH) 3 to octadecyltrimethoxysilane / dodecyltrimethoxysilane, and then loading Ni-MOF-ODTMS / DTMS and Mg (OH) 2 / Al (OH) 3-ODTMS / DTMS onto a polyurethane sponge by using polydimethylsiloxane as an adhesive, so as to obtain the MOF-based polyurethane sponge. The polyurethane sponge shows excellent super-hydrophobicity / super-lipophilicity and oil-water separation capacity, and the oil-water separation efficiency still reaches 99.2% after 10 times of circulation oil absorption. Meanwhile, the MOF-based polyurethane sponge shows excellent flame retardant property, so that the possibility of secondary fire caused by petroleum leakage accidents is avoided.

The invention belongs to the field of waste graphite regeneration, and particularly relates to a preparation method of a regenerated graphite active material, which comprises the following steps: carrying out first-stage gas-solid treatment on waste graphite powder in an atmosphere A in advance to obtain a first-stage material; the first-stage material is placed in an aqueous solution containing a solute a and a solute b for second-stage solvent heat treatment, and a second-stage material is obtained through separation; and mixing the second-stage material, an auxiliary agent and a carbon source, carrying out negative pressure heat treatment at the temperature T1, cooling to the temperature T2, directly contacting with a cooling medium, and carrying out cold quenching treatment to obtain the regenerated graphite active material. The invention also comprises the material prepared by the preparation method and application of the material in a battery. The graphite material regenerated by the method disclosed by the invention has excellent quick charge and long cycle performance.

The invention provides a high-purity quartz preparation method and product through complexing impurity removal and preferential corrosion co-processing, and the method comprises the following steps: carrying out sand making on quartz raw ore to obtain first quartz particles; performing pre-purification treatment on the first quartz particles to obtain second quartz particles; performing complexing impurity removal on the second quartz particles to obtain third quartz particles; carrying out flotation on the third quartz particles, and cleaning to obtain fourth quartz particles; and carrying out selective corrosion and tailing discarding on the fourth quartz particles, and filtering, washing and drying to obtain the high-purity quartz. According to the preparation method of the high-purity quartz, the requirement on the high-purity quartz raw material is relatively low, and the preparation of a product with higher purity under the same-quality raw material can be realized.

The invention discloses a natural hirudin extraction method based on cell fermentation. The natural hirudin extraction method comprises the following steps: S1, providing leeches, and carrying out starvation treatment on the leeches; s2, taking out the leeches, cleaning the leeches with a metaldehyde solution, and then putting the leeches into purified water for cleaning; s3, inducing and stimulating the leeches, and collecting secretory fluid; s4, extracting hirudin in the secretion on the basis of cell fermentation to obtain fermentation liquor; s5, carrying out separation and purification treatment on the fermentation liquor based on ammonium sulfate fractional precipitation salting-out; and S6, further separating and purifying the fermentation liquor based on ion exchange chromatography. According to the method, the components of the leeches are utilized, the extraction rate of the hirudin is further improved through cell fermentation, a two-stage separation and purification system is established, the purification process is optimized, and the recovery rate and the purification effect of the hirudin are further improved.

The invention provides a hydrogen purification device and method. The device comprises a feed gas compressor unit and a desulfurization unit, the device further comprises a hydrogen purification unit; the input end of the hydrogen purification unit is connected with the output end of the feed gas compression unit through the desulfurization unit; one path of the output end of the hydrogen purification unit is connected with a downstream supply end; the other path of the output end of the hydrogen purification unit is connected with the input end of the feed gas compressor unit through a return pipe; wherein the hydrogen purification unit consists of a rotary valve, a packed bed group, a filter, a hydrogen buffer tank and a flow meter; the rotary valve controls the packed bed group to separate hydrogen from desulfurized feed gas, and the hydrogen is input into a supply end through the filter, the buffer tank and the flowmeter in sequence; when the supply end stops working, the separated hydrogen flows back to the feed gas compressor unit through the return pipeline; the technical problems that in the traditional hydrogen purification process, energy consumption is high, operation is complex, and purification efficiency is low are solved.

The invention relates to the technical field of diamond purification, in particular to micro-powder purification equipment for artificial diamond processing, which comprises a pickling tank, the top cover is assembled at the top of the pickling tank; the mounting frame is fixed on the top cover; the first opening is formed in the mounting frame; the second opening is formed in the top cover, and the second opening is right opposite to the first opening; the lifting structure is arranged in the pickling tank; the stirring structure is arranged in the pickling tank; and the driving structure is arranged on the mounting frame. Compared with the prior art, the screen drum is driven by the motor to reciprocate up and down in the pickling solution, so that the diamond micro-powder is uniformly dispersed in the pickling solution, the micro-powder is prevented from settling to the bottom, the contact area of the micro-powder and the pickling solution is increased, and the purification and impurity removal effects of the pickling solution on the diamond micro-powder are improved; the stirring piece in the equipment is driven by the motor to rotate through the gear transmission system, the pickling solution is stirred, and the fluidity of the pickling solution is enhanced.

The invention discloses a preparation method of high-purity fused quartz powder, and the preparation method specifically comprises the following steps: S1, crushing; s2, fully washing the quartz powder with water, and then removing impurities; s3, feeding the crushed particles subjected to impurity removal into a pickling tank for pickling; s4, dissolving the crude product in two times of alkaline solution, carrying out alkali washing treatment, and carrying out ultrasonic cleaning after the treatment is completed; s5, the cleaned raw materials are fed into a heating furnace to be subjected to high-temperature heat treatment; s6, magnetic separation is repeated; and S7, further crushing into fused quartz sand of which the particle size is less than 2mm by adopting an impact crusher. According to the preparation method of the high-purity fused quartz powder, circulating pickling is adopted, the optimal pickling condition acid concentration, acid dosage, pickling time, pickling temperature and the like are selected, metal impurities are effectively removed, and the purification effect is good; repeated magnetic separation is carried out under high and low field intensities, the magnetic separation effect is good, magnetic impurities are preliminarily and efficiently removed, and the purity of the whole manufactured product is high.

The invention provides a low-cost high-efficiency calcium hydroxide purification method and process based on temperature regulation and control, and relates to the technical field of sodium hydroxide preparation, refined temperature control and zoned heating are adopted, the temperature of each heating zone is monitored in real time according to volatilization points and decomposition temperatures of different impurities, it is ensured that the temperature of each stage accurately reaches a set value, and the purification efficiency is improved. A PI D control algorithm is adopted to adjust the heating power, overheating or insufficiency is avoided, the purity of calcium hydroxide is ensured, an energy recovery system recovers waste heat generated in the reaction process through a heat exchanger and is used for preheating raw materials in other stages, energy consumption is effectively reduced, a low-temperature area, a medium-temperature area and a high-temperature area are set, and energy consumption is reduced. According to physical and chemical properties of impurities, staged heating treatment is performed, the purification process is dynamically optimized through intelligent process control in combination with AI and machine learning technologies and process parameters, automation and intelligence of the purification process are ensured, AI performs modeling through historical data, continuous optimization and learning are performed, the purification effect is improved, and the reaction rate is increased.

The invention belongs to the field of preparation of high-purity quartz, and relates to a method for directionally removing impurity elements of pegmatite type high-purity quartz, which comprises the following steps: (1) crushing raw materials by a crusher, washing ore, grinding and grading, reselecting and floating to obtain quartz concentrate; (2) adding the quartz sand into the leachate A for constant-temperature micro-pressure leaching, and washing to obtain primary quartz sand; the leachate A is mixed acid of HF, HCl and HNO3, the concentration ratio of the HCl to the HNO3 is (3-12): 1, the concentration ratio of the HCl + HNO3 to the HF is smaller than or equal to 3, and the sum of the concentrations of the HCl, the HCl and the HNO3 is larger than or equal to 3 mol / L; (3) roasting and water quenching to obtain intermediate quartz sand; (4) adding the quartz sand into the leachate B for ultrasonic leaching, washing, and carrying out high-temperature heat treatment to obtain high-purity quartz sand; the leachate B is a mixed acid of HF and HCl, HF is 0.5-2 mol / L, and the concentration ratio of HCl to HF is less than or equal to 3. According to the method, the 4N8-grade high-purity quartz sand can be obtained, the yield is high, the process is simple, and operation is easy.

The invention discloses a wet electronic chemical separation and purification device, and particularly relates to the technical field of wet electronic chemicals, the wet electronic chemical separation and purification device comprises a transmission base, the top of the transmission base is fixedly connected with a storage bin, and the front and rear sides of the right side of the transmission base are fixedly connected with separation and purification seats respectively; by arranging the separation and purification base, the vertical plate, the push-pull plate, the filtering bin, the storage bin and the test tube rotary table, automatic and continuous treatment of raw materials is achieved, the raw materials can fully react in the purification treatment process through the design of the separation and purification base, the raw materials can be fully separated, and the raw materials can be fully purified. The purification efficiency and effect are improved, due to the structural design of a vertical plate and a push-pull plate, operation is more convenient, meanwhile, the safety of the equipment is guaranteed, and the problem that due to the fact that sodium sulfate and wet electronic chemicals cannot be well fused, the sodium sulfate and the wet electronic chemicals can be fused insufficiently, and the preliminary passivation effect is affected is solved.

The invention relates to the technical field of phosphorane preparation, in particular to a primary pure phosphorane rectification device with a dredging function, which comprises a first heavy component removal tower, a light component removal tower and a second heavy component removal tower which are connected in series, the internal structure of each of the first heavy component removal tower, the light component removal tower and the second heavy component removal tower consists of a tower body, a condenser, a flow uniformizing device and a reboiler; the condenser is arranged at the top of the tower body and is used for condensing phosphine gas; the reboiler is arranged at the bottom of the tower body and is used for heating the liquid phosphine; and the flow uniformizing device is arranged between the condenser and the reboiler. According to the invention, the purification quality and the purification efficiency can be effectively improved.

According to the full-automatic sample treatment method and system for high-flux magnetic column treatment, distribution characteristic information of the target substance in the sample solution and motion characteristic information of the magnetic beads in the sample solution are obtained, so that the magnetic column applied to the sample solution is adjusted, the motion state of the magnetic beads in the sample solution is changed, and the sample treatment accuracy is improved. Enabling the magnetic beads to move as far as possible to pass through a target substance-rich area in the sample solution, and ensuring that target substances are efficiently attached to the surfaces of the magnetic beads; judging whether the magnetic beads need to be separated from the interior of the sample solution or not based on the target substance adsorption state information on the surfaces of the magnetic beads; when the magnetic beads need to be separated from the inside of the sample solution, the magnetic columns applied to the sample solution are adjusted based on the position information of the magnetic beads in the sample solution, so that the magnetic beads move according to corresponding paths, the magnetic beads are separated from the sample solution, and the magnetic beads can fully adsorb target substances in the sample solution; target substances are furthest enriched, and the purification effect is improved.

The utility model discloses a device capable of improving the high purity of quartz sand. The device comprises a screening box, a feeding port is formed in the top of the screening box, a plurality of supporting legs are fixedly connected to the bottom of the side wall of the screening box, an impurity removal cavity and an adsorption cavity are formed in the screening box, and the device further comprises a separation screening assembly located in the middle of the screening box; the material beating mechanism is located at the top of the separating and screening assembly; the magnetic suction impurity removal mechanism is located in the middle of the separating and screening assembly and used for adsorbing magnetic minerals in the filtered quartz sand; according to the scheme, by arranging the magnetic suction impurity removal mechanism, tiny magnetic minerals in quartz sand can be circularly adsorbed and removed, so that the situation that the purity of the quartz sand is affected due to the fact that the tiny magnetic minerals are difficult to filter and remove is avoided, and the purpose of effectively improving the purification effect on the quartz sand is achieved; impurities adhered to the quartz sand can be slapped and dispersed, so that the purification of the quartz sand is facilitated.

The invention discloses a high-purity quartz raw material purification device and a using method thereof, and relates to the technical field of quartz raw material purification equipment.The high-purity quartz raw material purification device comprises a reinforcing support, a tank body is rotationally arranged on the left side of an inner cavity of the reinforcing support, a premixing box is fixed to the top of the inner cavity of the reinforcing support, and a liquid collecting box is fixed to the premixing box; the side, close to each other, of the tank body and the premixing box is communicated with a telescopic square pipe, the top of the premixing box is communicated with a feeding pipe allowing quartz raw materials to enter, a premixing assembly is arranged in the premixing box, and an auxiliary mixing assembly used in cooperation with the premixing assembly is arranged in the tank body. By adopting a manner of premixing and then multiple mixing, quartz sand and a hydrochloric acid solution can be fully mixed, so that dead angles of mixing are effectively avoided, the reaction effect of the hydrochloric acid solution and the quartz sand is improved, and the purification effect of the device on a quartz raw material can be directly improved.

The application discloses a micro-fluidic chip and a method for recovering nucleic acids with different fragment sizes. The method can realize recovery of nucleic acids with different fragment sizes by repeatedly washing and recovering magnetic beads through the micro-fluidic chip. The method can improve the overall nucleic acid recovery effect by adjusting the adding concentration of the magnetic beads and PEG salt and the washing times, and can distinguish and control the nucleic acid length, and all the nucleic acids with different fragment lengths can be obtained by continuously adjusting the concentration. Moreover, the method can realize small volume, high throughput and automation.

The invention relates to a separation and purification method in chemical production, and provides an energy-saving and efficient nitro-aromatic hydrocarbon separation and purification method. Gravity settling, alkali washing, cooling and filtering are combined, a liquid-liquid micro-mixer and cooling and filtering are used for replacing traditional tedious multi-stage neutralizing and water washing operation of a multi-kettle series connection or static mixer, impurities such as residual acid, phenols, sodium salt and water in the acidic nitro-aromatic hydrocarbon are efficiently removed, the emulsification phenomenon is avoided, and the quality of the acidic nitro-aromatic hydrocarbon is improved. And the treated material can ensure long-term stable operation of a subsequent rectification system. The method does not need a two-stage washing process in the prior art, and is low in material consumption, energy consumption and wastewater amount; the liquid-liquid mixer is used for the alkali washing process, and the alkali washing effect is remarkably improved; water and salts in the crude nitro-aromatic hydrocarbon are removed in one step in a fiber filter element cooling and filtering mode, and the separation efficiency is high; the whole set of separation and purification device is a totally-closed system device, is small in occupied area and simple to operate, and the purification effect is remarkably improved compared with a conventional process.

The invention discloses a method for purifying an adrenocorticotropin analogue, which comprises the following steps of: removing impurities which have charge difference and polarity difference with the adrenocorticotropin analogue by using a specific chromatographic filler through one-step ion exchange chromatography and one-step reversed-phase chromatography, and purifying the adrenocorticotropin analogue to obtain the purified adrenocorticotropin analogue. The technical effect of efficiently purifying the corticotropin analogue is realized. The purity of the purified adrenocorticotropin analogue can reach 99.73%, the proportion of a single impurity is only 0.15%, and the recovery rate is increased by about 33% compared with the prior art. The method has the advantages of good purification effect, low production cost, environmental friendliness, simplicity and convenience in operation and the like.

The invention provides a purification method of lithium tetrafluoroborate, and belongs to the technical field of secondary batteries. The purification method of the lithium tetrafluoroborate comprises the following steps: adding lithium salt into a lithium tetrafluoroborate solution under the protection of nitrogen, stirring and dispersing, introducing boron trifluoride gas for reaction, and purging the solution by nitrogen after the reaction is finished; and filtering out excessive lithium salt, and concentrating, filtering and drying filtrate to obtain qualified lithium tetrafluoroborate. According to the method, the free acid hydrofluoric acid is converted into the product lithium tetrafluoroborate by adding the lithium salt and the boron trifluoride, waste is turned into wealth, the process is simple, the reaction effect is good, and the method is suitable for industrial production.

The application discloses a method for preparing high-purity tellurium dioxide powder from waste tellurium dioxide target material, comprising the following steps: step one, crushing the waste tellurium dioxide target material to obtain tellurium dioxide pre-crushed material; step two, ball-milling the tellurium dioxide pre-crushed material and drying to obtain tellurium dioxide powder; and step three, purifying the tellurium dioxide powder to obtain high-purity tellurium dioxide powder. 131 The application solves the problems of traditional powderization process, such as serious powder agglomeration, wide particle size distribution, easy introduction of impurities and poor industrial applicability, and the prepared powder can be directly applied to the production of tellurium dioxide target material, and the method can also be applied to the preparation of tellurium dioxide single crystal, infrared acousto-optic devices and electronic component materials, and has excellent industrial application prospect.

The utility model discloses a hydrogen purification device, which relates to the technical field of hydrogen purification and comprises a purification cylinder for gas circulation, a gas inlet is arranged at the top of the purification cylinder, and a gas outlet is arranged at the bottom of the purification cylinder. A hydrogen separation membrane used for purifying hydrogen in gas in the gas circulation process is arranged on the purification barrel, a partition plate is fixedly installed in the purification barrel, a gas passing opening is formed in the side wall of the purification barrel in a penetrating mode, and an exhaust pipe communicated with the interior of the purification barrel is fixedly installed on the top wall of the purification barrel; an upper baffle is fixedly installed on the upper portion of the outer wall of the purification cylinder, a lower baffle is slidably connected to the lower portion of the outer wall of the purification cylinder, a sleeve is arranged between the upper baffle and the lower baffle, and the hydrogen separation membrane is installed between the inner wall of the sleeve and the outer wall of the purification cylinder; and the interior of the purification barrel is divided into an upper chamber and a lower chamber which are independent from each other through a partition plate. The hydrogen separation membrane solves the problem that the utilization efficiency of the hydrogen separation membrane is low.