188results about "Crystallization separation" patented technology

Single-stage and multi-stage systems and methods for the recovery of critical elements in substantially pure form from lithium ion batteries are provided. The systems and methods include supported membrane solvent extraction using an immobilized organic phase within the pores of permeable hollow fibers. The permeable hollow fibers are contacted by a feed solution on one side, and a strip solution on another side, to provide the simultaneous extraction and stripping of elements from dissolved lithium ion cathode materials, while rejecting other elements from the feed solution. The single- and multi-stage systems and methods can selectively recover cobalt, manganese, nickel, lithium, aluminum and other elements from spent battery cathodes and are not limited by equilibrium constraints as compared to traditional solvent extraction processes.

The present invention relates to a process for producing salts from brine obtained from the desalination of seawater. The process can also make it possible to selectively recover NaCl, CaSO4, kainite, carnallite, magnesium sulfate, struvite, newberyite, or potassium bitartrate.

The application discloses a production system of o-nitrobenzenesulfonyl chloride, which comprises an etherification reaction kettle, a material transfer structure, a recrystallization pool, a separation mechanism and a chlorination reaction kettle. The material transfer structure comprises a rotary driving mechanism, a rotating disc and a charging disc. A plurality of rotating rods are fixedly connected to the rotating disc. The bottom of the charging disc is provided with a filter screen. A filtering station, a recrystallization station, a first drying station, a chlorination station, a second drying station and a discharging station are sequentially arranged around the rotating disc. The recrystallization pool is located directly below the recrystallization station. Drying boxes are respectively arranged below the first drying station and the second drying station. The chlorination reaction kettle is located directly below the chlorination station. The production system of o-nitrobenzenesulfonyl chloride realizes continuous and automatic production of o-nitrobenzenesulfonyl chloride through the arrangement of the recrystallization station and the multiple chlorination stations, guarantees the purity and yield of the product and improves the production efficiency.

The invention discloses a non-contact material pre-crystallizer for granulation, and relates to the technical field of crystallizers, the non-contact material pre-crystallizer for granulation comprises a fixed mounting base, a speed reducer plate frame is mounted above the fixed mounting base, and the right end of the speed reducer plate frame is provided with a driving gear disc capable of rotating an inner cylinder. The problems that a traditional granulation crystallizer depends on contact type mechanical operation, materials are gathered through physical acting force or by directly adding reagents, the product uniformity and the process effect can be seriously reduced in the aspects of energy consumption, efficiency and the like, material particles are prone to being mutually bonded or directly bonded in a container through contact type operation, and the production cost is high are solved. The problems that in the prior art, due to the fact that the mixing speed is different, follow-up cleaning is difficult, meanwhile, along with the different mixing speeds, the crystallization degree of material particles is different, and in the material particle input and discharge process, a conventional crystallizer can only conduct quantitative operation on materials, and continuous operation cannot be achieved are solved.

The invention relates to the technical field of brackish water desalination, and discloses a brackish water desalination system and method.The system comprises a primary water treatment device, a secondary water treatment device, a freezing pond, a tertiary water treatment device and a quaternary water treatment device, the secondary water treatment device is connected with the primary water treatment device, the secondary water treatment device is suitable for separating tail water, the freezing pool is connected with the secondary water treatment device, the tertiary water treatment device is connected with the freezing pool, and the quaternary water treatment device is connected with the tertiary water treatment device. The tail water is sequentially subjected to multi-stage separation and purification of the second-stage water treatment device, the freezing pool, the third-stage water treatment device and the fourth-stage water treatment device, salt and alkali in the tail water can be separated out, tail water treatment is achieved, the final product only comprises salt, alkali and water, and the tail water treatment device has the advantages of being simple in structure and good in tail water treatment effect.

A method for recovering lithium bis(fluorosulfonyl)imide is provided in the present application. The method of the present application comprises: mixing a slag from lithium bis(fluorosulfonyl)imide production process with a solvent of carbonate ester, to obtain a mixed material; subjecting the mixed material to solid-liquid separation, to obtain a discharged liquid and a solid slag; monitoring the chromaticity of the discharged liquid and comparing the chromaticity of the discharged liquid with a chromaticity reference; recycling the discharged liquid to the mixed material, if the chromaticity of the discharged liquid is higher than the chromaticity reference; and recycling the discharged liquid to lithium bis(fluorosulfonyl)imide production process, if the chromaticity of the discharged liquid is lower than or equal to the chromaticity reference.

Provided herein are method of recycling metallic ion content from inorganic solid and systems thereof. The methods and systems include contacting inorganic solid with an acid to produce said concrete precursors.

The utility model relates to the technical field of triazole crystallization, and discloses kettle equipment applied to triazole crystallization. The lifting support is arranged, the cross clamping strip is arranged on the rotating shaft, and the cross through hole is formed in the middle of the mounting ring, so that the position of the mounting ring is not changed in the downward moving process of the rotating shaft, and the rotating shaft synchronously drives the mounting ring to rotate in the rotating process. Through mutual cooperation of the first connecting rod, the second connecting rod, the L-shaped scraping rod, the vertical mounting plate and other parts, in the falling process of the rotating shaft, the second connecting rod can push the vertical mounting plate to turn outwards by a certain angle, so that the wall cutting part can be tightly attached to the inner wall of the reaction kettle; therefore, crystals on the inner wall of the reaction kettle can be scraped off more efficiently. The equipment is compact in structure, and has longer service life and lower equipment failure rate compared with the mode that a spring is tightly attached to the inner wall of the reaction kettle.

A high-salinity wastewater salt recovery and wastewater reuse device comprises a separation tank and a drying assembly, three sets of supporting columns are fixedly installed on the outer side of the separation tank, the drying assembly is installed among the three sets of supporting columns, an oil extraction mechanism is installed in the separation tank, a scraping mechanism is installed in the separation tank, and the oil extraction mechanism is connected with the scraping mechanism. And the scraping mechanism comprises a gear ring, the gear ring is rotationally connected to the interior of the separation tank, and the lower end of the gear ring is fixedly connected with two sets of scraping plates. By arranging the oil extraction mechanism and utilizing the buoyancy principle of the floating barrel, effective separation of grease and light components in the high-salinity wastewater is achieved, due to the design, the oil separation efficiency is improved, pollution of oil to the purity of follow-up crystallized salt is avoided, and therefore the high quality of the crystallized salt is ensured; the filtering box can be conveniently overturned and inclined, and filtered impurities are poured into the collecting box, so that the automatic cleaning of the filtering mechanism is realized.

This invention relates to the field of lithium hexafluorophosphate (LiPF6) crystal production, and particularly to a LiPF6 crystal production apparatus, comprising a reaction chamber, a separator for solid-liquid separation of a LiPF6 solution, a crystallizer for condensing the LiPF6 solution connected to the lower side of the separator, and a dryer for heating and drying the crystals connected to the upper side of the separator. The invention involves preliminary filtration of the solution through a separation cylinder, followed by condensation processing in a feed pipe, where dissolved LiPF6 crystals are condensed and precipitated. The height difference between the falling solution and the feed tray causes the solution to splash onto the feed pipe wall, increasing the contact area between the solution and the pipe wall, thereby increasing the condensation efficiency and improving the production quality of LiPF6 crystals.

The present invention relates to a plant for purifying a crude composition by crystallization, wherein the plant comprises at least one crystallizer, at least one buffer vessel and at least two heat pumps, wherein each of at least two heat pumps is connected with at least one buffer vessel, as well as to a process for purifying a crude composition by crystallization being performed in such a plant.

The method for isolating a lithium precursor according to the embodiment of the present application includes the steps of preparing a primary precursor mixture including a primary lithium precursor and a primary transition metal precursor, mixing the primary precursor mixture with a precipitation solution in a reactor to form a precursor mixture, and injecting a non-reactive gas into the precursor mixture. Accordingly, the lithium precursor can be isolated with high purity and high efficiency.

The invention relates to the technical field of chemical engineering, and provides a calcium chloride and magnesium chloride production device and a production method for preparing calcium chloride and magnesium chloride from dolomite, and the production device comprises a pretreatment assembly, a first-stage reaction kettle and a second-stage reaction kettle which are connected in sequence. The second-stage reaction kettle comprises a tank body, a first outlet formed in the upper part of the tank body and a second outlet formed in the bottom of the tank body. The first outlet is sequentially connected with a water washing tower, a drying device and an evaporation condenser. The second outlet is sequentially connected with a reduced-pressure evaporator, a low-temperature crystallizer, a horizontal centrifuge, a purification tank and a normal-pressure evaporator. The pretreatment assembly, the first-stage reaction kettle and the second-stage reaction kettle are sequentially arranged, so that gradient control over the reaction process is achieved, it is ensured that the acidolysis reaction is more thorough, the chemical purity of calcium chloride and magnesium chloride is improved, precise separation of gaseous impurities and liquid impurities is ensured, and the purification rate of a final product is further increased.

The utility model relates to a conical surface end socket for cooling crystallization equipment, which is applied to the field of cooling crystallization equipment and comprises an end socket body, a coil pipe is fixedly sleeved on the outer surface of the end socket body, two drain pipes are fixedly connected to the outer surface of the coil pipe, and a heat transfer plate is fixedly connected to the inner wall of the end socket body. The lower end of the end socket body is fixedly connected with a plurality of cooling fins, the outer surface of the end socket body is fixedly connected with a plurality of standby pipes, the lower end of the end socket body is fixedly connected with two discharging pipes, the outer surfaces of the discharging pipes and the lowest standby pipe are fixedly provided with one-way electric valves, and the outer surface of the end socket body is fixedly connected with two fixing plates. By the adoption of the coil pipe and other structures, the coil pipe is arranged outside the end socket, secondary cooling is directly conducted on a black titanium solution entering the end socket, the black titanium solution is discharged after reaching the standard temperature, and the practicability of the end socket is improved.

Solutions and methods are disclosed for the extraction and quantification of cellulose derived from cellulosic biomass samples. Improved extraction yields and selectivities are provided through the use of an extraction solvent mixture comprising an aprotic solvent such as DMSO, a quaternary ammonium salt such as TBAF, and an quaternary ammonium base such as TBAOH. The extracted cellulose can be optionally precipitated using disclosed precipitation solutions to further improve cellulose purity. Extracted cellulose can be measured by hydrolyzing the cellulose to glucose or cellobiose, or by using disclosed spectrophotometric assays of cellulose-salt complexes.

The invention provides a process for generating a metal sulphide comprising nickel and / or cobalt, comprising the steps of: i. forming an aqueous metal sulphate solution by reacting sulphuric acid with a raw material feed comprising nickel and / or cobalt in water; ii. crystallizing said metal sulphate from said aqueous metal sulphate solution to form a crystallized metal sulphate in a mother liquor, the mother liquor comprising an uncrystallized metal sulphate; iii. separating said crystallized metal sulphate from said mother liquor; iv. reacting at least a portion of said uncrystallized metal sulphate with hydrogen sulphide in an acidic aqueous medium, thereby obtaining a slurry consisting of a solid phase comprising a metal sulphide precipitate and an aqueous phase comprising one or more impurities and sulphuric acid; and v. separating said solid phase and said aqueous phase.

The invention relates to the technical field of nervonic acid extraction, in particular to a device and method for separating nervonic acid from malania oleifera oil for biological medicine manufacturing, the device comprises a distiller, the distiller comprises a sealing tank and a dismounting cylinder, and a film scraping mechanism and a plurality of negative pressure tanks are arranged in the sealing tank and the dismounting cylinder respectively. According to the device and method for separating nervonic acid from malania oleifera oil for biological medicine manufacturing, a spiral scraping plate of a lifting part is linked with a reciprocating lead screw through a clamping ring, synchronous rotation and up-down reciprocating motion are achieved, the whole surface of a condensation pipe is covered, a condensate liquid film is actively scraped away, heat resistance of a retained liquid film is eliminated, the condensation efficiency is improved, and the efficiency of separation of nervonic acid from malania oleifera oil is improved. The nervonic acid fraction is prevented from staying on a condensation wall for a long time, and the condition of thermal degradation or backmixing is prevented.

The present disclosure relates to a method of carbon dioxide mineralisation, the method comprising: treating a material, such as a mineral, with carbon dioxide and a base, wherein the treatment occurs in solution phase, the material comprising: a first cation that is Ca or Mg; a second cation which is not Ca and or Mg; and one or more anions which are not carbonate; such that a product solution comprising an acid or a salt of the base and one of the one or more anions and a salt of the second cation and one of the one or more anions is formed, and a carbonate salt of the first cation is caused to precipitate.

Disclosed in the present invention are a method for synthesizing a high-safety positive electrode material by recycling positive electrode leftover materials, and an application. The method comprises: adding an acid and a reducing agent into positive electrode leftover materials for dissolving, carrying out solid-liquid separation to obtain a first filtrate, adding an alkali into the first filtrate to adjust the pH value for reaction for a period of time, so that most of aluminum ions are precipitated, carrying out solid-liquid separation to obtain a second filtrate, carrying out precipitation reaction on the second filtrate to obtain a precursor, mixing the precursor, a lithium salt and a fluorine source, and calcining in an oxygen atmosphere to obtain a high-safety positive electrode material, wherein the fluorine source is PVDF. According to the present invention, a high-performance and high-safety Al and F co-doped positive electrode material is synthesized by recycling waste positive electrode leftover materials; by means of the synergistic effect of A1 and F, the structural stability of the material at a high temperature is improved, structural damage caused by reaction between the positive electrode and the electrolyte at a high temperature is effectively inhibited, the safety is improved, cation mixing is reduced, ion migration kinetics of lithium ion deintercalation and intercalation are enhanced, and excellent electrochemical performance is achieved.

This invention discloses a stirring crystallization composite component for cholesterol extraction, belonging to the field of cholesterol processing technology. It includes a tank with a cover on top and a base fixedly connected to the bottom. The base has an internal mounting cavity containing a motor. The motor's output shaft is fixedly connected to a drive sleeve, the upper end of which extends into the tank and is coaxial with it. The cover has a through hole through which a fixing sleeve is inserted. A rotating handle is fixedly connected to the upper end of the fixing sleeve, which is snapped into the cover by a locking mechanism. A stirring rod is located inside the tank, with slots at both its upper and lower ends. This multifunctional cholesterol extraction stirring device, with its detachable stirring rod and stirring components, allows for easy disassembly and assembly of the stirring rod and components. This not only facilitates maintenance and repair but also allows for convenient removal and cleaning of the stirring components after stirring.

A method for recycling an anode material includes a step (a) of loading a heat treatment object including the anode material into a heat treatment furnace, a step (b) of raising an internal temperature of the heat treatment furnace to increase to a range of about 100° C. to about 400° C., a step (c) of heat-treating the heat treatment object at the increased temperature, and a step (d) of discharging first powder made after the heat treatment of the heat treatment object is completed. The first powder includes recycled anode powder selected from the group consisting of recycled carbon powder, silicon powder, silicon oxide powder, carbon-silicon composite material powder, or combinations thereof, and the heat treatment object includes at least a portion of a waste lithium-ion secondary battery or wastes generated during a process of manufacturing the lithium-ion secondary battery or a process of manufacturing the anode material.

A simultaneous desiliconization and defluorination wastewater advanced treatment device and method are disclosed. This invention relates to a precipitation device and method for removing silicon and fluoride from water, aiming to solve the technical problems of low silicon removal efficiency, large amounts of added chemicals, complex operation, and high cost of existing silicon removal methods. The device of this invention is a pool with a central baffle dividing the pool into a coagulation zone and a sedimentation zone. A stirrer, a first spiral heating tube, and a first inclined plate are installed in the coagulation zone; a second inclined plate, a filter device, and a second spiral heating tube are installed in the sedimentation zone; an electro-adsorption device is installed at the lower end of the baffle. Wastewater treatment method: Wastewater containing silicon and / or fluoride is introduced into the coagulation zone, sodium aluminate and a coagulant are added, and heating and stirring are performed for coagulation and sedimentation. After electro-adsorption flocculation and sedimentation by the electro-adsorption device, the wastewater enters the sedimentation zone for enhanced sedimentation, overflows, and the treatment is completed. The silicon removal rate reaches 92%–98%, and the fluoride removal rate is higher than 71.43%. It can be used in the field of wastewater treatment.

The utility model relates to the technical field of chemical equipment, and discloses a chemical reaction crystallization device convenient to maintain, which comprises a crystallization kettle body, a jacket, an end cover and a stirring component, the jacket is fixedly sleeved outside the crystallization kettle body, a cooling water cavity is formed between the crystallization kettle body and the jacket, the bottom side of the jacket is fixedly provided with a bottom frame, and the end cover is arranged on the bottom frame. The end cover is fixedly provided with a motor through a connecting frame, a driving shaft of the motor is fixedly connected with an assembly seat, the stirring component comprises a stirring shaft and two stirring blades, the two stirring blades are fixedly connected outside the stirring shaft in a sleeving manner at intervals, the stirring shaft penetrates through the end cover, the assembly seat is slidably connected to the end part of the stirring shaft in a sleeving manner, and the stirring shaft is fixedly connected with the assembly seat. Two T-shaped studs are symmetrically connected between the stirring shaft and the assembling base in a threaded mode, the stirring component is convenient to disassemble and assemble, and therefore the stirring component which is corroded and abraded can be replaced conveniently, and the later maintenance convenience of the device can be improved.

The invention relates to the technical field of crystallization tank supports, and discloses a multidirectional buffering anti-seismic crystallization tank support and an anti-seismic method.The multidirectional buffering anti-seismic crystallization tank support comprises a base plate and a crystallization tank body, longitudinal guide assemblies are fixed to the four corners of the top of the base plate, and longitudinal buffering plates are fixedly connected between the movable ends of the four longitudinal guide assemblies; first buffer assemblies are fixed to the four corners of the top of the base plate, and second buffer assemblies are fixed to the tops of the longitudinal buffer plates. According to the multidirectional buffering anti-seismic crystallization tank support and the anti-seismic method thereof, the communication pipeline is arranged through the buffering adjusting assembly to limit flowing of hydraulic oil in the first buffering assembly and the second buffering assembly, and the self-locking effect is achieved; the self-locking of the first buffer assembly and the second buffer assembly can be synchronously relieved, the movement range of the first buffer assembly and the second buffer assembly can be synchronously adjusted according to the magnitude of the vibration sense, and automatic opening is achieved and buffering is carried out according to the magnitude of the vibration sense.

The present invention relates to a method for recycling polyurethanes from a composition comprising an elastomeric polyurethane (PU1) and at least one further material, the method comprising the steps of providing a composition (CW) comprising a polyurethane (PU1) and at least one further material, and contacting the composition (CW) with a solvent mixture (SM) comprising at least one alcohol and at least one compound (A1) selected from the group consisting of cyclic amides, at a temperature below the boiling point of the alcohol, to obtain a solution (S1) rich in dissolved polyurethane (PU1). The invention also relates to the polyurethanes obtained or obtainable by said method, as well as to the use of the polyurethanes according to the invention for preparing molded articles.

The invention provides a water pollution treatment device and a method for extracting lithium from lepidolite and recovering sodium sulfate. Relates to the field of water pollution treatment, in particular to a water pollution treatment device which comprises an evaporation crystallizer arranged on the ground. According to the water pollution treatment device and the method for extracting lithium from lepidolite and recovering sodium sulfate, three-time washing sewage is used as a cooling medium, water vapor generated by the evaporation crystallizer is converted into pure water through low-temperature condensation, and cyclic utilization of the pure water is achieved while sewage treatment is conducted; the third-time washing sewage absorbs heat in the water vapor condensation process to achieve preheating, the energy efficiency is improved, efficient potassium sulfate recovery is achieved, dependence on external raw materials is reduced, and the economic benefits are improved, the third-time sewage is input into an evaporation crystallizer or a mixing box through an electromagnetic valve, and the concentration of a third-time near-pure water washing sewage solution is extremely low; evaporation is carried out after washing sewage is mixed, and the problems that violent bumping easily occurs due to direct evaporation, heat transfer is unstable, and effective crystals are difficult to form are avoided.

The application discloses an ammonia refining device and method, and belongs to the technical field of sewage stripping. The ammonia refining device comprises a refining tower, a crystallization tank, an adsorption tank, a cyclone separator, a variable frequency refrigerator, a low-pressure liquid ammonia tank, a low-pressure liquid ammonia pump, a high-pressure liquid ammonia tank and a first heat exchanger, a third heat exchanger and a fourth heat exchanger which are connected in sequence. After carbon powder and moisture are removed through the cyclone separator, gaseous ammonia from the adsorption tank enters the variable frequency refrigerator, is directly changed into liquid ammonia after heat exchange with refrigerant medium of the variable frequency refrigerator, is temporarily stored in the low-pressure liquid ammonia tank, and is pumped into the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger in sequence through the low-pressure liquid ammonia pump after heat exchange, so that the temperature and the pressure are increased, and the liquid ammonia enters the high-pressure liquid ammonia tank for safe storage. The process flow is short, energy consumption is low, the system operation is safe and reliable, and the recovered liquid ammonia is high in purity.

A method for recovering one or more acids from an acidic aqueous solution includes contacting the acidic aqueous solution with an organic treatment material comprising dimethyl ether to form an acidic aqueous-organic fraction and an aqueous acid-depleted fraction. The acidic aqueous solution comprises the one or more acids, one or more solutes, and water. The method includes separating the acidic aqueous-organic fraction from the aqueous acid-depleted fraction. The method also includes converting substantially all of the dimethyl ether in the acidic aqueous-organic fraction from a liquid phase to a gaseous phase to form an organic treatment material fraction and an acidic aqueous fraction from the acidic aqueous-organic fraction. The method further includes separating the acidic aqueous fraction from the organic treatment material fraction, and recovering the one or more acids from the acidic aqueous fraction.

This invention relates to the field of wastewater treatment, and discloses an anti-precipitation and crystallization device for a wet flue gas desulfurization wastewater treatment system. The device includes a vessel body with an inlet, an outlet, and a drain. The vessel body is equipped with a disturbance mechanism and a heating mechanism. A deformable pad is laid at the bottom of the vessel body, and a slag discharge pipe is located at the center of the bottom. The middle part of the deformable pad is fixedly fitted onto the slag discharge pipe. The edge of the deformable pad is driven to rise and fall by a lifting mechanism. During the rising and falling process, the precipitated crystals adhering to the deformable pad are lifted and discharged from the slag discharge pipe. The anti-precipitation and crystallization device for a wet flue gas desulfurization wastewater treatment system provided by this invention achieves crystal detachment by the rising edge of the deformable pad, relying on the deformation of the pad and the slag discharge by gravity. This eliminates the need for a dedicated slag discharge mechanism, and the disturbance mechanism also does not require a lifting system, making the overall equipment more simplified.