46results about How to "Low impurity content" patented technology

This invention relates to the field of hafnium carbide technology and discloses a thermal decomposition preparation process for hafnium carbide precursors. The process includes: dissolving hafnium tetrachloride in anhydrous ethanol, adding propylene oxide dropwise for neutralization and acid removal to obtain a neutral ethanol-hafnium precursor solution; adding ethyl acetoacetate methacrylate and heating for coordination to obtain a hafnium coordination monomer solution; adding acrylonitrile and an initiator and heating for polymerization; when the viscosity of the reaction solution increases, injecting a dimethyl sulfoxide hot solution of melamine as a locking liquid; precipitating, separating, and drying to obtain the hafnium carbide precursor; and after oxidative crosslinking treatment, calcining at high temperature under an inert atmosphere to undergo carbothermic reduction to obtain hafnium carbide powder. This invention achieves molecular-level dispersion of precursor components through liquid-phase coordination and in-situ network locking, effectively reducing the reaction temperature and inhibiting grain agglomeration, thus producing high-purity, ultrafine hafnium carbide powder.

This invention provides a method for producing high-purity aluminum-niobium-tantalum master alloys and co-producing ammonium fluoride, belonging to the fields of metallic materials and inorganic chemicals. The invention involves mixing fluoroniobic acid, fluorotantalic acid, and ammonia water for a precipitation reaction to obtain a precipitate and an ammonium fluoride solution. The ammonium fluoride solution is then concentrated, cooled for crystallization, dehydrated, and dried sequentially to obtain ammonium fluoride. The precipitate is then dried and oxidized and calcined sequentially to obtain an oxide. The oxide, aluminum powder, potassium chlorate, and calcium fluoride are mixed and subjected to a vacuum aluminothermic reaction to obtain the high-purity aluminum-niobium-tantalum master alloy. This invention, considering both broadening the range of raw material selection and optimizing the production process, reacts fluoroniobic acid, fluorotantalic acid, and ammonia water to produce niobium hydroxide and tantalum hydroxide precipitates, which are then oxidized and calcined to form niobium and tantalum oxides. The high-purity aluminum-niobium-tantalum alloy is then prepared using a vacuum aluminothermic reaction. Simultaneously, ammonium fluoride can be co-produced, resulting in high raw material utilization.

This invention relates to the field of mining environmental protection equipment technology, and more particularly to a separable mining carbon neutralization device. The separable mining carbon neutralization device provided by this invention solves the technical problem of poor operational stability in existing mining carbon neutralization devices. The separable mining carbon neutralization device includes a pre-stage component for separating carbon dioxide from gas, a post-stage component for adsorbing the carbon dioxide separated by the pre-stage component, and a gas pump. By setting a separation membrane to separate carbon dioxide from the gas, the gas entering the post-stage component has a higher carbon dioxide content and lower impurity content, which facilitates rapid adsorption of carbon dioxide by the adsorbent, thereby improving the stability of the mining carbon neutralization device during operation and increasing the gas treatment efficiency.

The invention discloses a temperature control method for processing graphite by using double plasma sources, and relates to the technical field of plasma material processing, in particular to a temperature control method for processing graphite by using double plasma sources, which comprises the following steps: adopting a cylindrical reactor, and arranging a plasma source I and a plasma source II up and down along the axial direction on two sides of the cylindrical reactor, and an outlet of the powder feeding mechanism directly faces a core high-temperature area of the plasma source I, so that graphite powder directly enters a heating area. The two sources are connected in series up and down to construct a continuous relay type high-temperature path. The center distance between the powder feeding port and the source I is limited not to exceed half of the outlet diameter of the reactor, the center distance between the two sources is 1-2.5 times of the outlet diameter, and the center distance between the source II and the outlet is larger than 5 times of the diameter; the flow of the second source is 1.2-1.8 times that of the first source, the temperature of the core area is maintained to be 8000-10000 K by adjusting the flow ratio, and the total power does not exceed 100 kilowatts. The total retention time of the graphite powder in a two-source high-temperature area is longer than 0.2 second, the diameter of an outlet of the reactor is 100-400 mm, the reactor is made of high-temperature-resistant stainless steel or graphite, and accurate control over the graphite treatment temperature is achieved.

This utility model provides a wastewater cooler with a pipe anti-clogging device, including a wastewater cooler body. An outlet pipe and an inlet pipe are connected to both ends of the wastewater cooler body. The inlet end of the inlet pipe is connected to a filter pipe via a bent connecting pipe. A slag collection pipe seat is connected to the end of the filter pipe away from the bent connecting pipe. A support column is installed at the bottom inside the slag collection pipe seat, and a turbine housing is installed on the support column. A turbine is installed inside the turbine housing, and the turbine is rotatably connected to the inner wall of the turbine housing via a rotating shaft. This utility model, by installing a filter pipe at the inlet end of the wastewater cooler body, can filter the wastewater entering the wastewater cooler body, ensuring that the filtered wastewater does not contain large particles of impurities, preventing excessive impurities from clogging the wastewater cooler. A conical filter screen is installed inside the filter pipe to further filter the passing wastewater, reducing the impurity content in the wastewater.

This invention discloses a compound preparation for treating vascular dementia and its preparation method. The active pharmaceutical ingredient consists of protopanaxadiol and gallic acid in a 1:1 mass ratio, and the dosage form is liposomes. The preparation method includes extraction, mixing, liposome preparation, and optional freeze-drying steps: protopanaxadiol and gallic acid are extracted and purified from ginseng rhizome and Terminalia chebula fruit, respectively. After mixing, they are combined with phospholipids and cholesterol to prepare a lipid membrane. The membrane is then homogenized by hydration, low-temperature ultrasound, and high-pressure microfluidic jet to obtain a homogeneous liposome suspension, which can be further freeze-dried into a freeze-dried powder. The 1:1 composition of protopanaxadiol and gallic acid targets multiple points on the pathological mechanism of vascular dementia, showing significant therapeutic effects and broad application prospects. This preparation uses a liposome dosage form to improve the bioavailability of the active ingredient, the preparation process parameters are controllable, the active ingredient has high purity, the liposomes have uniform particle size, high encapsulation efficiency, and good stability.

This invention discloses a multi-stage residual film separation device, comprising a feeding belt, a first separation mechanism, a shredding and separation mechanism, a second separation mechanism, a discharge belt, and a collection tank. The shredding and separation mechanism is equipped with an inlet, an upper discharge outlet, and a lower discharge outlet. The feeding belt and the discharge belt are respectively connected to the inlet and lower discharge outlet of the shredding and separation mechanism. The second separation mechanism is connected to the upper discharge outlet of the shredding and separation mechanism. The first separation mechanism is connected to the feeding belt. A collection tank is provided at the outlets of the first and second separation mechanisms. This invention employs a multi-stage separation method to separate different types of residual film, achieving effective separation of different types of residual film. This avoids both excessive impurities in the separated residual film and excessive residual film in the waste impurities, thus preventing resource waste.

The utility model relates to an underground garage drainage structure which comprises an underground foundation pit with a hollow interior and an open top, a water collecting well is arranged in the middle of the interior of the underground foundation pit, a parking space is arranged at the top of the water collecting well, a water collecting groove is formed between the water collecting well and the underground foundation pit, and a plurality of water filtering assemblies covering the opening of the water collecting groove are arranged at the top of the water collecting groove. A water suction pump is installed on the side, away from the water inlet pipe, of the water collecting well, and a water outlet of the water suction pump communicates with a water outlet pipe extending out of the water collecting well. Through the water filtering assembly and the water collecting well, the problems that an existing drainage structure is poor in filtering effect and disordered in water flow are solved, meanwhile, installation and maintenance are convenient and fast, the drainage efficiency and stability of the underground garage are effectively improved, and the maintenance cost is reduced.

The present disclosure relates to a method for detecting vitamin D or a steroid hormone and a blood sample pretreatment kit. The method for detecting vitamin D in blood comprises pretreating a blood sample to obtain a test sample, and detecting the test sample by liquid chromatography tandem mass spectrometry, wherein the pretreatment comprises: adding an internal standard solution and a magnetic bead reagent to the blood sample to obtain a mixed solution and incubating to allow the target analyte to bind to the surface of the magnetic beads; separating the magnetic beads combined with the target analyte; and eluting the target analyte from the surface of the magnetic beads to obtain the test sample, wherein the mixed solution comprises methanol in an amount of 45vol% to 60vol%, or ethanol in an amount of 30vol% to 50vol%. The method can significantly reduce non-specific adsorption of magnetic beads, and improve the accuracy and sensitivity of detection.

This application discloses a multi-stage filtration device for inorganic pigment production, belonging to the technical field of inorganic pigment production equipment. It includes a device body, internally comprising a primary filtration unit, a secondary cyclone unit, a precision filtration unit, and a heating module. The design is novel and the device ingenious. The slurry enters the coarse filter screen through the feed inlet. A vibrating motor prevents screen clogging. After preliminary filtration, the slurry enters the cyclone chamber, where centrifugal force separates medium-sized particles. Finally, it undergoes precision filtration through a sintered filter element. The backwash pipeline periodically reverse-flushes the filter element, triggering a backwash program every two hours for 30 seconds. Before shutdown, the feed is shut off, and the backwash is run three times. This improves filtration accuracy and effectively reduces the impurity content of the finished product. The backwash design extends the filter element's lifespan and maintenance cycle. The synergistic effect of cyclone and vibration increases the throughput when processing high-viscosity slurries, greatly enhancing the device's practicality.

This invention discloses a method for side-stream extraction of refined tetracyclododecene, comprising: using dicyclopentadiene, ethylene, and norbornene as raw materials, and toluene as solvent, conducting a Diels-Alder reaction in a batch reactor to obtain crude tetracyclododecene product; removing ethylene, norbornene, and toluene from the crude product by atmospheric distillation, and then sending it to a vacuum distillation column; in the vacuum distillation column, dicyclopentadiene and tetracyclododecene products are obtained at the top of the column, high-purity tetracyclododecene product is obtained by side-stream extraction, and heavy components are removed from the bottom of the column.

This utility model discloses a goji berry residue collection device for a goji berry pressing machine, including a goji berry pressing machine. The residue from the machine's discharge end is conveyed to a vibrating screen via an elevator. The vibrating screen is equipped with a primary and a secondary screen. The residue is screened out through the primary screen, and the seeds are screened out through the secondary screen. This goji berry residue collection device disperses the pressed and agglomerated residue through the vibrating screen, separates the seeds to be recovered, and other impurities such as peels and stems enter a drying device. After drying, the peels and seeds shrink and dry due to water loss, weakening their binding force. After being conveyed by air, they collide in the separation chamber, separating the peels and seeds. The seeds are then recovered by air separation and returned to the vibrating screen for further processing. This method results in low impurity content and high recovery rate in the recovered seeds.

This utility model belongs to the field of chemical equipment technology, specifically a catalyst addition device for a reaction vessel, including a reaction vessel body; a guide pipe is fixedly connected to the top of the reaction vessel body; the guide pipe penetrates the surface of the reaction vessel body; a support rod is fixedly connected to the bottom of the guide pipe; and a feed inlet is provided at the top of the guide pipe. Through the filter plate structure, this design is not only simple and convenient to operate, but also intercepts mechanical impurities and crystals in the catalyst through the filter plate, preventing impurities from entering the reaction system, thereby significantly reducing the impurity content in the product, such as metal ions and solid particles, improving product purity and stability, and further improving processing quality. Moreover, the mechanical vibration achieves an anti-clogging function, reducing downtime caused by cleaning the filter device and greatly improving production efficiency. Compared with complex electronic induction or hydraulic backwashing systems, it has the advantages of simple structure and low maintenance cost.

This utility model relates to the technical field of cable production, and in particular to a cable insulation layer extrusion molding machine. It uses an extrusion device to extrude molten raw materials and attach them to the surface of the cable core. A feeding device controls the automatic feeding process, and a dust removal device, in conjunction with a dust collection device, collects dust and impurities from the surface of the raw material particles, reducing the impurity content in the insulation layer and improving production quality and equipment usability. The machine includes an extrusion device, a feeding device, a dust removal device, and a dust collection device. The feeding device is installed on the extrusion device, the dust removal device is installed on the extrusion device, and the dust collection device is installed on the extrusion device.

The present application provides a suspension of sirolimus, which comprises sirolimus, a stabilizer, an osmotic pressure regulator, a suspending agent, a pH regulator and water; wherein the sirolimus is suspended in the water in the form of solid. The preparation process of the inhalation suspension provided by the present application is simple, and the selected excipients are suitable for use in drugs, so that the preparation provided by the present application is not only safe and reliable, but also low in production cost. The inhalation suspension provided by the present application can be stored at room temperature, and after long-term storage, the particle size of sirolimus in the preparation changes little, and the impurity content is low. The bioavailability of the suspension provided by the present application is much higher than that of oral preparations.

This utility model relates to the technical field of non-ferrous metal flotation reagent synthesis reaction equipment. It provides a sedimentation-type mineral processing reagent synthesis reactor, including a tank body. A motor is installed at the top of the tank body, and the motor is connected to a stirring shaft via a gear set. The tank body is divided into an upper chamber and a lower chamber by a filter baffle. The side wall of the tank body has a feed port and a discharge port communicating with the upper chamber, and the bottom of the tank body has a slag discharge port communicating with the lower chamber. Heating wires are arranged circumferentially on the inner wall of the upper chamber. The tank body has a heating box for heating the heating wires. The heating wires are sequentially covered with a ceramic layer and an anti-vortex layer. The tank body is divided into a reaction zone in the upper chamber and a sedimentation zone in the lower chamber. The crystals naturally settle into the lower chamber, while the clear liquid remains in the upper chamber. The heating wires arranged circumferentially on the inner wall of the upper chamber, covered with a ceramic layer and an anti-vortex layer, evenly transfer the heat generated by the heating wires to the inner wall of the tank body, changing the material flow direction, reducing the dead zone of stirring, and making the temperature and concentration distribution more uniform.

The present application relates to a method for producing pyromellitic acid, which comprises: (1) contacting durene, an oxidation source, an acetic acid solvent and a catalyst to obtain a first oxidized material by liquid phase oxidation, wherein the catalyst contains a Co salt, a Mn salt, a Zr salt and a bromide compound; (2) using the first oxidized material as a raw material, adding a bromide solution, and continuing to contact the oxidation source to produce pyromellitic acid by oxidation; and steps (1) and / or (2) are carried out in the presence of carbon dioxide. The method for producing pyromellitic acid of the present application is carried out in the presence of carbon dioxide in steps (1) and / or (2), which can improve the yield of pyromellitic acid and reduce the impurity content in the product.

The application provides a battery pole piece sorting and recycling system and method. The battery pole piece sorting and recycling system comprises a magnetic sorting unit, a shredding unit, a drying unit, a first crushing unit, a first separating unit, a second crushing unit, a second separating unit, a linear sorting unit and a material collecting unit connected in sequence. The application realizes fine sorting of battery pole piece powder, improves the recovery rate of high-value metal materials in the pole piece, and effectively reduces the impurity content of the finished product.

The utility model provides an aquaculture sedimentation microfiltration device relates to aquaculture technical field, including microfiltration machine body, the top of microfiltration machine body is welded with support frame, the inboard of support frame is provided with sedimentation filter component, sedimentation filter component includes the processing jar of installation inboard of support frame, the inner wall upper side of processing jar is welded with connecting frame, the inboard of connecting frame is welded with installation ring frame, the inner wall of installation ring frame is opened with connecting groove, the inboard of installation ring frame is provided with filter cartridge, the bottom of processing jar is opened with water outlet, the water inlet of microfiltration machine body is connected with water outlet, through setting sedimentation filter component, through the filter cartridge middle section mesh, the impurity in water is filtered and intercepts, and the impurity under the connection will fall to the bottom of filter cartridge, when the impurity in filter cartridge accumulates too much, the operator can take out filter cartridge from installation ring frame through connecting top ring, and the convenience of replacing filter cartridge is increased.

The application discloses a high-performance aluminum nitride ceramic rapid sintering method and belongs to the technical field of ceramic materials, and comprises the following steps: preparing ceramic raw materials according to a formula: uniformly mixing high-purity aluminum nitride powder, a sintering aid, a hydrolysis-resistant agent and a solvent, and drying under a nitrogen atmosphere; the ratio of the high-purity aluminum nitride powder, the sintering aid and the hydrolysis-resistant agent is 1:1%-3%:0.5%-1.5%; primary sintering of the ceramic: heat-press sintering the uniformly mixed aluminum nitride powder under a neutral or reducing atmosphere at 1650-1850 DEG C and a pressure of 20-30 MPa for 10-60 min, so that the density of the aluminum nitride powder reaches more than 99%; secondary sintering of the ceramic: sintering the primary-sintered aluminum nitride ceramic under a reducing atmosphere at 1850-2000 DEG C under normal pressure for 1-6 h. The prepared aluminum nitride ceramic not only has high heat conduction performance, but also has high sintering efficiency; meanwhile, the problem of waste gas generated in the degreasing process is avoided, and the environment is protected.

The utility model relates to bird's nest processing technical field especially, more particularly to a kind of bird's nest raw material cleaning device with spray dedusting.The utility model provides a kind of bird's nest raw material cleaning device with spray dedusting, including protective housing, filter core, water pipe, nozzle, feeding plate and high-pressure water pump, filter core is fixedly connected in the bottom of protective housing inner wall, water pipe is fixedly connected on the upper side of protective housing inner wall, multiple nozzles are connected and communicated with annular array on water pipe, feeding plate is fixedly connected on the top of protective housing, high-pressure water pump is fixedly connected on the right side of protective housing.The utility model is cooperated with negative pressure bin by high-pressure fan, forms high-efficiency dust collection system, can quickly suck dust, feather and other light impurities in bird's nest raw material into dust collecting barrel, realizes the preliminary cleaning to raw material, which effectively reduces the impurity content in subsequent washing process, improves cleaning efficiency, and reduces the work intensity of manual picking.

This utility model discloses a heat treatment device for processing high-toughness spring steel wire, including a lead bath. A screen is horizontally arranged inside the lead bath. A lead water pump is fixedly connected to one side of the outer wall of the lead bath. A sealing door is provided on one side of the outer wall of the lead bath. A quenching tank is fixedly connected inside the lead bath. Two filter screens are fixedly connected to the bottom of the quenching tank. A circulation pipe corresponding to the lead water pump is fixedly connected to one side of the outer wall of the quenching tank. A bracket is provided inside the quenching tank. Positioning columns are fixedly connected to both ends of the bottom of the bracket. Rollers are provided inside the bracket. This utility model, through the cooperation of the lead bath, lead water pump, quenching tank, filter screen, and screen, facilitates the filtration and removal of slag in the lead liquid. This reduces the impurity content during continuous quenching, improving the lead bath quenching quality of the steel wire and eliminating the need for frequent slag removal by workers, thus increasing the quenching efficiency of steel wire processing.

This invention discloses a method, system, and product for separating and purifying high-purity copper-64 from a nickel target, belonging to the field of radionuclide preparation and separation technology. The method includes acid dissolution of the irradiated nickel target, and the resulting product containing... 64 Cu、 64 Ni、 61 The solution of Co was loaded onto a pretreated AG1-X8 anion exchange resin column, followed by rinsing with 50-60 mL of 6M HCl to remove Co. 64 Ni was removed by rinsing with 20-30 mL of 4M HCl. 61 Co was finally eluted with 4-6 mL of 2M HCl to obtain high purity. 64 Cu product. This invention achieves highly efficient and selective separation of 64Cu by optimizing the elution sequence and conditions. The product has a nuclear purity >99.9%, extremely low content of key metal impurities, and a separation efficiency of over 84%, making it suitable for medical applications. 64 A reliable solution has been provided for the large-scale production of Cu.

This invention discloses a method for removing impurities from ferrous sulfate, a byproduct of titanium dioxide production, comprising the following steps: 1) taking ferrous sulfate and preparing a saturated solution; 2) adding dilute phosphoric acid, stirring thoroughly, and filtering to remove insoluble matter; 3) adding an appropriate amount of ammonia to the obtained solution, filtering, and evaporating the filtrate; 4) slowly stirring and cooling the remaining solution until the solution temperature drops to 10°C, centrifuging to obtain primary crystals and primary crystallization mother liquor; 5) dissolving the obtained primary crystals again and preparing a saturated solution, repeating steps 3) and 4) to obtain secondary crystals and secondary crystallization mother liquor; 6) dissolving the secondary crystals to prepare a ferrous sulfate solution, which can be directly used for the preparation of battery-grade iron phosphate. This method uses phosphoric acid, ammoniation, and recrystallization to remove impurities from ferrous sulfate through multiple processes. After impurity removal, the heptahydrate ferrous sulfate solid has high purity and low metal impurity content, and can be directly used for the synthesis of battery-grade iron phosphate after dissolution.

This invention relates to a method for enhancing the stirring intensity during vanadium extraction, belonging to the field of steel pretreatment. The method includes the following three steps: first, vanadium-containing molten iron is added to a converter; then, a top-and-bottom blowing process is used for smelting; coolant is added according to the composition and temperature at the smelting endpoint; finally, semi-steel is removed from the lance at the smelting endpoint. The top-blown gas is an oxygen-nitrogen mixture, and the total flow rate of the oxygen-nitrogen mixture is 31,000~35,000 Nm³. 3 / h; the oxygen consumption per ton of iron, the top blowing lance position, and the nitrogen consumption per ton of iron are controlled in segments according to the blowing period; the bottom blowing gas is nitrogen, and the nitrogen supply intensity is controlled in segments according to the blowing period. This invention significantly enhances the stirring intensity of the molten pool without significantly increasing the temperature rise rate through the synergistic effect of the high-flow-rate oxygen-nitrogen mixed gas from the top and the variable-flow-rate nitrogen from the bottom, thereby shortening the mixing time and enhancing the slag-metal reaction, further increasing the vanadium oxidation amount and further reducing the TFe content in the vanadium slag.

This utility model relates to a hydrogen filling port, including a valve body, a first filter element connected to the inlet end of the valve body cavity, a second sealing ring provided between the first filter element and the inner wall of the valve body, a valve seat connected to the outlet end of the valve body cavity, a third sealing ring connected between the valve seat and the first filter element, a spring seat with a convex structure connected to the other end of the valve seat, a spring groove formed on the convex structure of the valve seat, a first spring connected in the spring groove, the lower end of the valve disc being movably connected within the spring groove via the first spring, the upper end of the valve disc being located between the valve seat and the first filter element, a connector extending into the valve body being connected to the inner wall of the valve body with a sealing element, a detachable second filter element connected in the cavity of the connector, and a second spring connected between the second filter element and the spring seat. This utility model improves the filtration efficiency of the hydrogen filling port, significantly reducing the impurity content in the hydrogen cylinder.

This utility model discloses a treatment system for recovering industrial-grade sodium chromate from chromium-containing electroplating wastewater. The system is sequentially connected to a pretreatment system, an ion exchange system, an evaporation and concentration system, a purification system, and an evaporation and crystallization system. The pretreatment system removes suspended solids. The ion exchange system contains at least four ion exchange columns and an eluent tank; the coordinated operation of multiple columns ensures sufficient adsorption and elution of chromium, increasing the concentration of hexavalent chromium in the eluent, reducing the load on subsequent evaporation equipment, and shortening processing time. The evaporation and concentration system uses an MVR evaporator and integrates an online density meter. The purification system is equipped with a purification reaction vessel with a detachable pH meter probe, which can quantitatively remove sulfate, reducing the difficulty of salt separation and crystallization, increasing the number of mother liquor circulations, and thus improving the chromium recovery rate. The feed to the eluent tank allows for reasonable adjustment of the alkali dosage according to different concentrations of components, avoiding waste and reducing costs. The detachable pH meter probe facilitates maintenance, ensures accurate monitoring, and improves the stability of sulfate removal rate and the quality of sodium chromate products.

The utility model relates to a related field of ceramic flowing water ornaments, especially an ornamental ceramic flowing water ornament, which comprises a base, a flowing water tank, a through hole, a water pump, a water tank, a water outlet pipe, a spray head, a partition, a baffle, a filter screen, a solenoid valve, a circulating pipe, a second branch pipe and a ceramic model, etc. The utility model is provided with a filter screen to preliminarily circulate the flowing water, reduce the impurity content in the flowing water in the ceramic flowing water ornament, reduce the pollution of the impurities to the ceramic ornament, and separate the water tank into a standing chamber, a water outlet chamber and a backflow chamber. When the water in the water outlet chamber and the backflow chamber is used, the impurities in the standing chamber are precipitated, and the impurities are reduced when the water in the standing chamber is used subsequently, so that the pollution of the impurities to the ceramic ornament as a whole is further reduced, the overall appearance of the ceramic flowing water ornament is improved, and the cleaning workload of the ceramic ornament is reduced.