186results about "Aluminium chlorides" patented technology

The present disclosure relates to the field of sodium-ion battery technology, and specifically, to a method for preparing carbon-coated sodium iron fluorophosphate from waste lithium iron phosphate and the application thereof. The method for preparing carbon-coated sodium iron fluorophosphate from waste lithium iron phosphate includes: mixing a waste lithium iron phosphate material with an alkaline solution for reaction, followed by solid-liquid separation, to obtain an aluminum-containing filtrate and a lithium iron phosphate filter residue; mixing the lithium iron phosphate filter residue, aluminum chloride and sodium chloride uniformly, followed by vacuum calcination, to obtain a calcination material; and mixing the calcination material with at least one of a sodium source, an iron source and a phosphorus source uniformly to obtain a mixture to which a fluorine source, a carbon source and a solvent are added for uniformly mixing, followed by drying and calcination sequentially to obtain the carbon-coated sodium iron fluorophosphate. The method has the advantages of low costs, a high added value, a short process, and a high recovery rate, and the carbon-coated sodium iron fluorophosphate obtained from the method has excellent electrochemical performance.

This invention discloses a method for leaching lithium iron phosphate mixed powder with iron salts and recovering all components, belonging to the field of battery recycling. The invention uses an iron salt solution to leach the mixed powder, obtaining a lithium-containing leachate and leaching residue. Ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, and recycled for leaching the next batch of mixed powder. After reaching a preset number of cycles, the leachate is used for re-leaching multiple batches of leaching residue to improve the lithium leaching rate. Ultimately, a enriched solution containing Li, Fe, Cu, and Al and graphite-containing iron phosphate residue are obtained. Copper is recovered from the enriched solution through iron powder replacement, and a high-purity lithium chloride solution is obtained through extraction and separation, while ferric chloride (recycled) and aluminum chloride crystals are also recovered. The leaching residue is treated with hydrochloric acid to obtain regenerated graphite, and the pH is adjusted with alkali to obtain high-purity iron phosphate. This method achieves full component recovery under mild conditions, reducing separation steps and chemical consumption through a "leaching-regeneration-leaching" cycle mechanism, thus achieving both environmental and economic benefits.

The invention discloses a low-cost and environment-friendly process for producing 1, 4-bis (4-fluorobenzoyl) benzene, and belongs to the technical field of Friedel-Craft reaction, fluorobenzene and paraphthaloyl chloride react to generate 1, 4-bis (4-fluorobenzoyl) benzene, after reaction quenching, filtering is performed to obtain a crude product 1, 4-bis (4-fluorobenzoyl) benzene and filtrate, and the 1, 4-bis (4-fluorobenzoyl) benzene is purified in a sublimation crystallization mode; standing and layering the filtrate in an inclined plate layering device, respectively treating an oil layer and a water layer, dehydrating a fluorobenzene layer in a dehydrating tower, and returning fluorobenzene; the water phase is firstly subjected to organic matter removal treatment, the obtained organic matter enters a fluorobenzene recovery device to be sleeved back, and the obtained water phase is a byproduct of crystallized aluminum chloride in an evaporative crystallization device. According to the process, the 1, 4-bis (4-fluorobenzoyl) benzene is produced in a sublimation crystallization mode instead of a solution crystallization mode, no waste solvent is generated, the waste solvent does not need to be recycled, the cost is low, organic matter removal and evaporative crystallization treatment is carried out on wastewater, organic matter recycling is carried out, crystalline aluminum chloride is produced as a byproduct, and wastewater and waste salt are not discharged.

The invention discloses a method for extracting and recovering metal elements in lithium batteries using a chlorination method, which belongs to the technical field of lithium battery recovery. The method comprises the following steps: step 1, calcining the positive electrode sheet of the lithium battery to remove organic matter, and peeling off the aluminum foil to obtain electrode material powder; step 2, placing the electrode material powder on a carrier of a Joule heat device, and performing a thermal shock treatment under a chlorine atmosphere, and the treatment process is staged by stage heating and chlorination; step 3, desublimating the gas generated after chlorination in each stage; step 4, adding the solid after desublimation in each stage to deionized water, adding a sodium carbonate aqueous solution after mixing, collecting the precipitate, washing and drying to obtain a metal salt product. The present invention is based on the characteristics of Joule heat that can heat quickly and accurately control the temperature, combined with the difference in the temperature of the chlorination reaction of different metal oxides and the gasification temperature of the chlorination product, to achieve staged gasification and desublimation treatment, obtain different metal chlorides, and purify accurately and efficiently.

Provided is a method for recovering valuable metals from a positive electrode of waste lithium iron phosphate. The method includes: subjecting a waste lithium iron phosphate battery to discharging and disassembly; subjecting a lithium iron phosphate positive plate obtained by the disassembly to breaking, followed by high temperature treatment; uniformly mixing a product obtained by the high temperature treatment with a carbon material, and roasting a mixture in a high-purity Cl2 atmosphere; subjecting a gas phase product obtained by the roasting to fractional quenching and condensation to recover ferric chloride and aluminum chloride separately; and subjecting a solid phase product obtained by the roasting to water leaching and filtration to obtain a lithium chloride aqueous solution, and then adding sodium carbonate to precipitate lithium carbonate. As a one-step carbothermal chlorination method is adopted in combination with a two-stage quenching and condensation process in the present invention, the use of acidic solutions during recovery of valuable metals from the lithium iron phosphate positive electrode can be avoided, and the use of large amounts of alkaline solutions or extraction agents to separate and recover chlorides step by step is also not required. The method of the present invention has the advantages of a high metal recovery rate, a low comprehensive cost and good economic benefits, social benefits and environmental protection benefits.

A carbo-chlorination process is disclosed for selectively producing AlCl3 from an alumina-containing feedstock, comprising introducing the following into a fluidized bed reactor maintained at 600-700° C.: (a) dried and calcined feed stream comprising the alumina-containing feedstock and a carbon feed; (b) chlorinating agent; (c) selectivity agent; (d) dried air; and optionally (e) off-spec AlCl3. The process further includes removing a vapor stream from the reactor in which preferably about 75-80%, of the alumina present in the reactor is converted to AlCl3; and also removing a solid raw pozzolan stream from the reactor, wherein about 90-99% of the silica present in the reactor remains unconverted and exits the reactor through the solid raw pozzolan stream. The vapor stream comprising AlCl3 is purified to create an AlCl3 product stream comprising preferably greater than about 99.99% AlCl3. The raw pozzolan product is classified to remove coke and create a final pozzolan product having a strength activity index (SAI) in the range of 80-160, per ASTM 618.

The invention discloses a fused salt purification method and a fused salt purification device.The fused salt purification method comprises the following steps that S1, in an oxygen-free and water-free operation environment, fused salt is put into a reaction container, firstly, the fused salt is heated to a first preset temperature and kept for a first preset duration, and then the fused salt is heated to a second preset temperature and kept for a second preset duration; s2, mixed gas of HCl and H2 is introduced into the reaction container heated to the second preset temperature, HCl is cut off after a period of time, then H2 is used for bubbling for a period of time, inert gas is introduced for bubbling, residual HCl and H2 in the molten salt are removed, and purified molten salt is obtained. The molten salt purification device comprises a gas supply system, a reaction container and a storage container, the device can treat kilogram-level chlorine salt in batches, and the molten salt purification efficiency is high.

The invention discloses an electronic waste efficient chlorination comprehensive recovery device and method, and relates to the technical field of chemical metallurgy, the electronic waste efficient chlorination comprehensive recovery device comprises a chlorination reaction cavity, a heating system, a vacuum system, an atmosphere control system and a condensation separation system; the heating system is used for controlling the temperature of the chlorination reaction cavity; the vacuum system is communicated with the heating system; the atmosphere control system comprises a chlorine gas source and a protective gas source; and the temperature of the condensation separation system is gradually reduced. Through the high-purity graphite heating assembly, the sealing structure and the atmosphere control system, the highest heating temperature is 1700 DEG C, the temperature limit of 1200 DEG C of a traditional quartz tube furnace can be broken through, the chlorine corrosion problem is solved, chlorine is not leaked, and the environment is not polluted. High-valued recovery of different metal resources can be achieved through low-temperature pyrolysis, high-temperature chlorination volatilization and three-stage condensation settling separation, and the method has the advantages of being low in energy consumption, high in recovery rate, environmentally friendly and the like and is suitable for industrial metal resource recovery.

The invention discloses a method for preparing high-purity crystalline aluminum chloride from 1, 4-bis (4-fluorobenzoyl) benzene production wastewater, which belongs to the technical field of 1, 4-bis (4-fluorobenzoyl) benzene production, and comprises the following steps: (1) introducing aluminum chloride wastewater generated in 1, 4-bis (4-fluorobenzoyl) benzene production into a triple-effect evaporator for cyclic concentration and evaporation; (2) filtering the crystallized aluminum chloride solution concentrated in the step (1), and mixing with hydrochloric acid, so that the pH value of the crystallized aluminum chloride solution is less than 2; (3) feeding the acidified crystalline aluminum chloride solution in the step (2) into a crystallizer for crystallization; and (4) feeding the material in the crystallizer in the step (3) to a centrifugal filter for filtering to obtain crystalline aluminum chloride with the purity of more than 98%, and returning the mother liquor to the crystallizer. According to the method, the aluminum chloride wastewater is treated by using the triple-effect evaporator, aluminum-containing insoluble substances generated by thermal decomposition and hydrolysis after evaporation are treated by adding hydrochloric acid, the purity of crystallized aluminum chloride is high and can be stabilized at 98% or above, and the standard of a premium grade product is met.

The invention discloses a method for circularly leaching lithium iron phosphate mixed powder from ferric salt and recovering all components, and belongs to the field of battery recovery. The method comprises the following steps: leaching mixed powder by adopting an iron salt solution to obtain a lithium-containing leaching solution and leaching residues; ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, the ferric iron is cyclically used for leaching the next batch of mixed powder, after the preset cycle number is reached, the leachate is used for re-leaching treatment of multiple batches of leaching residues, and the lithium leaching rate is increased. And finally obtaining enriched liquid containing Li, Fe, Cu and Al and iron phosphate slag containing graphite. And replacing the enriched liquid with iron powder to recover copper, extracting and separating to obtain a high-purity lithium chloride solution, and simultaneously recovering ferric chloride (recycling) and aluminum chloride crystals. And treating the leaching residues with hydrochloric acid to obtain regenerated graphite, and adjusting the pH value with alkali to obtain high-purity iron phosphate. According to the method, all-component recovery is achieved under the mild condition, separation steps are reduced through a leaching-regeneration-leaching circulation mechanism, chemical consumption is reduced, and the method has both environmental and economic benefits.

The invention discloses a method for co-processing chromium-containing aluminum mud and electrolytic aluminum overhaul slag, which comprises the following steps of: oxidizing cyanide in the finely ground overhaul slag into carbon dioxide and nitrogen by using hexavalent chromium with strong oxidizing property in the chromium-containing aluminum mud under an acidic condition, and adding calcium oxide into decyanated slag to obtain trivalent chromium precipitate and insoluble villiaumite; and chloridizing the washed and dried precipitation slag by adopting aluminum chloride, carrying out multi-stage condensation separation and purification on the chloridized flue gas to respectively obtain ferric trichloride and aluminum trichloride, carrying out heat exchange and washing on the chloridized slag to obtain a chromium trichloride solution, and carrying out alkaline leaching to obtain sodium aluminate and tailings. According to the method, oxidation-reduction characteristics of the chromium-containing aluminum mud and the overhaul slag are utilized to cooperate with detoxification, a carbon-based wave-absorbing material in the overhaul slag is subjected to microwave heating for chlorination recovery of valuable elements, the heating rate is high, heating is uniform, the reaction efficiency is high, harmless treatment of the two hazardous wastes is achieved, the valuable elements such as chromium and aluminum in the hazardous wastes are effectively recovered, and the method is suitable for industrial production. And the energy utilization rate is high.

The invention provides a process for directly reducing iron and separating iron and aluminum from aluminum oxide red mud, and relates to the technical field of comprehensive utilization of metallurgical solid waste such as red mud and carbon dioxide CCUS. According to the process for directly reducing iron and separating iron from aluminum by using aluminum oxide red mud, solid wastes such as red mud, secondary aluminum ash or other sodium-based additives, metallurgical slag and the like are used as raw materials, and are mixed and granulated after being reasonably matched with a catalyst. Roasting in a gas semi-suspension oxidation kiln; and the roasted material enters a self-gravity closed electric heating reduction kiln to be calcined by taking biomass as fuel. CO gas generated by calcination is used as fuel of the fuel gas semi-suspension oxidation kiln. After calcination, under the protection of excessive CO gas, the high metallization ratio of 95% or above is achieved, iron and aluminum are separated, the material cooled to about 200 DEG C is leached with water, the levigated material enters a magnetic separator, solid-liquid separation and solid-phase magnetic separation of metal iron are achieved, and titanium concentrate and slag are separated.

The present invention relates to a method for removing aluminum (Al) from a black mass derived from deactivated batteries. The aluminum removal method enables the selective removal of only aluminum by thermally treating a black mass, derived from waste batteries, together with a chlorine compound precursor, so that lithium (Li) can be obtained with high purity and recovery rate. Furthermore, the aluminum removal method facilitates process control and has high safety. Furthermore, the aluminum removal method facilitates process control and has high safety.

Methods for removing impurities from precursors and related systems are provided. A method comprises at least one thermal cycle. The at least one thermal cycle comprises one or more of the following steps: heating a vessel comprising a precursor and at least one impurity to a temperature for a duration sufficient to vaporize at least a portion of the at least one impurity; measuring a vapor pressure within the vessel to obtain a measured vapor pressure and comparing the measured vapor pressure to a set point vapor pressure; and when the measured vapor pressure is above or within the set point vapor pressure, removing, from the vessel, at least a portion of a vapor comprising the at least one impurity. Other methods and systems are provided herein.

A system and method for separating aluminum trichloride from cold-hydrogenated silicon tetrachloride includes a pressure-reducing tank, a condenser, a first extraction tank, a second extraction tank, a clear liquid filter, and a clear liquid tank. The system is characterized by: a silicon tetrachloride inlet pipe at the top of the pressure-reducing tank; the bottom of the pressure-reducing tank being connected to the first and second extraction tanks via pipes; the bottoms of the first and second extraction tanks being connected to a dryer via pipes; the side walls of the first and second extraction tanks being connected to the clear liquid filter via pipes; the tops of the first and second extraction tanks being connected to the condenser via pipes; the bottom of the condenser having a liquid outlet pipe connected to the top of the clear liquid tank; and the bottom of the clear liquid tank having a silicon tetrachloride recovery pipe; and the clear liquid filter being connected to the liquid outlet pipe via a pipe. This invention improves the clogging situation of the entire cold hydrogenation system, solves the problem of long-term operation of the cold hydrogenation system, and reduces the equipment failure rate.

The invention relates to a method for producing iron chloride and aluminum chloride, characterized in that i) sludge ash containing at least one iron compound and aluminum compound is reacted with at least one alkali metal chloride and / or at least one alkaline earth metal chloride at a temperature of 200 to 1100 DEG C in an inert atmosphere, and ii) discharging and separating the formed iron chloride and aluminum chloride in an exhaust stream.

The invention provides a novel process for producing high-purity aluminum trichloride, and belongs to the technical field of aluminum chloride. The production method comprises the steps of pretreatment, preparation of aluminum trichloride and purification. The purification method comprises the following steps: heating aluminum trichloride to 330-350 DEG C, maintaining the current temperature, introducing gaseous aluminum trichloride into a fixed bed loaded with aluminum powder under the protection of nitrogen for 20-40 seconds, and cooling the output gas to obtain high-purity aluminum trichloride, according to the novel process for producing the high-purity aluminum trichloride, the purity of the obtained high-purity aluminum trichloride is 99.81 to 99.85 percent, and the yield of the obtained high-purity aluminum trichloride is 89.94 to 91.16 percent.

The invention discloses an aluminum ash recovery process, and belongs to the technical field of aluminum ash treatment. The aluminum ash recovery process comprises the following process steps: mixing and stirring aluminum ash and an extracting agent A in a first reactor to react for a first reaction time, filtering to obtain a first filtrate, introducing the first filtrate into a second reactor, adding an extracting agent and a regenerant B, and stirring to react for a second reaction time to obtain a second filtrate; a regenerated extracting agent A and a metal aluminum element recovery product are formed and filtered, a second filtrate flows back into the first reactor to continue to participate in the reaction, and filter residues contain the metal aluminum element recovery product; the second filtrate contains a regenerated extractant A; the extracting agent A is concentrated hydrochloric acid with the concentration of 36-38%; and the extractant regenerant B is sodium hydroxide.

Provided is a solid electrolyte (11) which has a compound that contains lithium, a halogen, and one or more elements that are selected from the group consisting of Zr, Al, Y, Zn, In, Ta, Nb, Hf, La, Ce, Ba, Sr, Ca, Mg, and Ga. The fluorine concentration in a surface region (11B) is higher than that in a central region (11A), and the thickness of the surface region (11B) is 1 nm to 1,000 nm.

This application relates to the technical field of titanium dioxide production by the chlorination process, and particularly to a preparation system and a preparation method of aluminum trichloride. The aluminum trichloride preparation system includes a gravity feeding device, a reaction device, and a premixing device. Along the height direction of the reaction device, the gravity feeding device is arranged above the reaction device and is used to add excessive aluminum particles to the reaction device by gravity. The gravity feeding device includes a silo, a control valve, and a weighing sensor, and the aluminum particles placed in the silo are controlled by the control valve and the weighing sensor to add excessive aluminum particles to the reaction device according to a preset quantity and by gravity. The premixing device includes a premixing container and a premixing flowmeter arranged in the premixing container, and is used to premix appropriate amounts of chlorine gas and aluminum tetrachloride gas according to a preset ratio. The reaction device is used to mix and react the aluminum particles put by the gravity feeding device and the premixed gas transported by the premixing device to produce aluminum trichloride.

To provide a coating liquid for film formation that can form a metal oxide film with excellent flatness even on uneven surfaces and reliable heat resistance by chemical vapor deposition. [Solution] A coating solution for forming metal oxide films by chemical vapor deposition, wherein the coating solution is a one-component coating solution containing a β-diketone complex, an inorganic metal salt, and a solvent, or a multi-component coating solution comprising coating solution A containing a β-diketone complex and a solvent, and coating solution B containing an inorganic metal salt and a solvent, wherein the β-diketone complex and the inorganic metal salt are composed of metal atoms of period 3 to 6 and group 2 to 14.

The utility model relates to an aluminum mud recycling system which comprises an aluminum mud collecting chamber, a reaction tank, a first settling chamber and an aluminum chloride collecting chamber which are connected in sequence, an outlet of the aluminum chloride collecting chamber is connected with an evaporator which is sequentially connected with a crystallizer and a first filter, and an outlet of the first filter is further connected with an inlet of the evaporator. The other outlet of the aluminum chloride collecting chamber is connected with a polymerization chamber which is connected with a second settling chamber, and the second settling chamber is connected with the curing chamber through a second filter. The aluminum mud recycling system can be used for preparing aluminum chloride hexahydrate crystals and liquid polyaluminum chloride at the same time, and the prepared liquid polyaluminum chloride is high in purity and wide in application range.

The invention relates to the technical field of aluminum chloride, in particular to an anhydrous aluminum trichloride production system which comprises a reaction unit, a feeding unit, a heat exchange unit, a buffer unit and a crystallization unit, the heat exchange unit comprises a heat exchange shell and a plurality of heat exchange pipes, and the bottom wall of the heat exchange shell gradually inclines upwards in the direction away from a chlorination furnace; the buffer unit is used for buffering the aluminum trichloride and the fused salt carried by the aluminum trichloride so as to separate the fused salt from the aluminum trichloride; the feeding unit is used for feeding the chlorination furnace, generated aluminum trichloride sequentially passes through the heat exchange unit and the buffer unit and then enters the crystallization unit to form crystals, so that a set of complete and continuous production system is formed, and meanwhile, most fused salt can flow back to the chlorination furnace along the obliquely arranged heat exchange shell in the cooling process of the aluminum trichloride; and the residual molten salt is left in the buffer unit after being buffered and cooled by the buffer unit, so that most or even all of the molten salt carried in the aluminum trichloride gas can be removed, and the crystallization purity of aluminum trichloride is improved.

The invention relates to the field of fuel and boiler systems, in particular to a coal gangue valuable element self-heating extraction system which comprises a feeding module, a crushing module, a decarburization activation module and a valuable element extraction module which are sequentially linked to form a closed loop. The feeding module adopts a belt type and spiral feeding combination; the crushing module is used for crushing the coal gangue until the particle size is below 2cm by using a jaw crusher; the temperature of the decarburization activation furnace is controlled at 750-850 DEG C, coal gangue decarburization, ash activation and rare earth calcination are achieved, flue gas is subjected to heat exchange to produce 300-450 DEG C high-temperature steam for energy supply, and bottom slag is ground to 200 meshes or below for standby application. The valuable element extraction comprises a magnetic separation iron removal sub-module, a hydrochloric acid leaching sub-module and the like, and the system adopts gradient energy utilization (high-temperature steam, medium-temperature steam and low-temperature steam are respectively used for acid leaching, aluminum chloride hexahydrate crystallization, extraction and white carbon black preparation). The system realizes the utilization of all components such as carbon and aluminum in the coal gangue, produces high-value products such as metal gallium and rare earth oxides, realizes self-heating to reduce energy consumption, is matched with an environment-friendly treatment unit, is adaptive to different coal gangue components, and is good in energy efficiency and economical efficiency.

A process for producing alumina and a lithium salt comprising the steps of: (a) calcining an alpha spodumene ore or concentrate to produce beta spodumene; and (b) (I) leaching beta spodumene from the calcining step (a) with an alkaline solution under pressure; or (II) sulphating beta spodumene with at least sodium sulphate and leaching said sulphated beta spodumene to produce a lithium containing solution and a zeolitic residue. The lithium containing solution is treated to provide a purified lithium salt and said zeolitic residue is treated to provide high purity alumina.

The invention provides a method for synergistically extracting lithium and aluminum from clay type lithium ore. According to the method, sodium carbonate and limestone synergistic roasting is combined with sodium hydroxide leaching, CO2 precipitation is regulated and controlled through a magnetic field, and then lithium and aluminum are integrally recycled through an ammonium chloride roasting method, so that the industrial feasible process with the high recovery rate, the high Li / Al ratio, low energy consumption and comprehensive resource utilization is expected to be achieved, and the industrial problem of efficient separation of lithium and aluminum in clay lithium ore is solved. The mineral structure is activated through collaborative roasting of sodium carbonate and limestone; then a magnetic field is applied to the sodium hydroxide leaching solution, carbon dioxide is introduced, the precipitation behaviors of lithium and aluminum are selectively regulated and controlled through the magnetic field, and the lithium-aluminum ratio in the coprecipitate is remarkably increased; and finally, by means of ammonium chloride roasting, gas phase-solid phase separation that lithium is fixed in the form of lithium chloride and aluminum escapes in the form of volatile aluminum chloride is realized, so that lithium and aluminum products with high recovery rate are synchronously obtained, and resource utilization of waste residues is realized.

The present invention relates to a method for producing aluminum-containing materials, particularly aluminum oxyhydroxy chloride and alpha alumina. The method includes a step of supplying an aluminum-containing raw material and separating the aluminum-containing raw material to obtain a pregnant liquor. The pregnant liquor is concentrated to obtain a saturated aluminum solution, and a crystallization process is applied. The aluminum chloride hexahydrate crystal slurry is cooled, and the crystals are separated from the spent liquor. The aluminum chloride hexahydrate crystals are heated under a controlled air flow to obtain dehydrated aluminum oxyhydroxy chloride. Optionally, the aluminum chloride hexahydrate crystals may be dried under at least partial vacuum before being heated under a controlled air flow. The aluminum oxyhydroxy chloride may then be decomposed and calcined mainly to form alpha alumina.

The invention relates to a method and a device for hardness removal, desulfurization and dechlorination of high-salinity wastewater by using carbide slag, and belongs to the technical field of industrial wastewater treatment. The method comprises the steps of heavy metal removal, magnesium ion removal, two-stage desulfurization and dechlorination, calcium ion removal and the like, heavy metals, Mg < 2 + >, SO4 < 2->, Cl <-> and Ca < 2 + > in the wastewater are sequentially and efficiently removed, and generated precipitates are subjected to solid-liquid separation and then partially reused for desulfurization. The device comprises a neutralization tank, a magnesium sedimentation tank, a first reaction tank, a second reaction tank, a calcium sedimentation tank, a desulfurization tower, a fan and a multi-stage solid-liquid separation unit, and is compact in structure and clear in division of labor. According to the method, carbide slag solid waste resources are fully utilized, the treatment efficiency is high, the operation cost is low, by-products can be recycled, and the method has good engineering adaptability and economic and environmental benefits.

The invention belongs to the field of aluminum trichloride preparation, and particularly relates to an anhydrous aluminum trichloride automatic crystallization device which comprises a crystallization kettle and a quantification box, the output end of the quantification box is fixedly connected with a heat preservation pipe, an air inlet pipe is fixedly connected to the position, close to the top, of the outer side of the crystallization kettle, and the tail end of the air inlet pipe is communicated with the interior of the crystallization kettle in a tangential mode. A conveying valve is fixedly connected to the top of the quantitative box, an exhaust pipe is fixedly connected to the top of the crystallization kettle, a heat exchange cavity is formed in the crystallization kettle, a plurality of heat exchange valves communicated with the heat exchange cavity are fixedly connected to the outer side of the crystallization kettle, a sealing valve and a discharging valve are installed at the bottom of the crystallization kettle, the sealing valve is located above the discharging valve, and the discharging valve is located above the discharging valve. By means of the arrangement, the efficient crystallization process of aluminum trichloride is achieved, the interior of the whole crystallization kettle is completely isolated from the outside, the crystallization process can be automatically selected according to requirements, and high-quality anhydrous aluminum trichloride is effectively prepared.