153results about "Aluminium chlorides" patented technology

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.

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 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 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.

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.

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 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.

A process for preparing sodium aluminium tetrachloride, the process comprising, under 5 anhydrous conditions and an oxygen-free atmosphere: in a first dosing stage, providing a reactor containing sodium aluminium tetrachloride and solid aluminium, and optionally solid sodium chloride, and bringing the reactor to a temperature of from about 150 °C to about 400 °C, thereby providing a reaction mixture comprising a liquid sodium aluminium tetrachloride phase; in a chlorine-dosing stage, contacting the reaction mixture with a chlorine-containing gas; and in an 0 optional further dosing stage, adding solid aluminium and / or solid sodium chloride to the reactor, wherein the optional further dosing stage is performed during or alternating with the chlorine-dosing stage, and wherein solid sodium chloride is added to the process in at least one of the first or further dosing stage.

Aspects of the invention include a method of producing a cement material comprising a first reaction step in which a calcium-containing starting material is reacted with a first acid to produce a water-soluble first calcium salt, a second reaction step in which the water-soluble first calcium salt is reacted with a second acid to produce a solid second calcium salt, where the second acid is different from the first acid and the second calcium salt is different from the first calcium salt, and a heat-treating step in which the second calcium salt is heat-treated to produce a first cement material. Preferably, but not necessarily, during the second reaction step, the reaction between the first calcium salt and the second acid regenerates the first acid.

The invention provides a potassium chloroaluminate fused salt and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing dried AlCl3 and KCl raw materials, adding into a crucible, and heating to melt the mixed raw materials in the crucible to form an AlCl3-KAlCl4 mixed fused salt; the method comprises the following steps: adding a small amount of KCl into molten salt for multiple times until no volatile matter is generated in a crucible to form KAlCl4 molten salt, and carrying out hot filtration on the pure KAlCl4 molten salt to obtain pure, transparent and impurity-free potassium chloroaluminate; wherein the AlCl3 in the raw materials needs to be appropriately excessive, so that after the raw materials form a melt, a small amount of free AlCl3 exists in the molten salt, and pure KAlCl4 is formed by adding a small amount of KCl for multiple times in the subsequent process to chemically combine the free AlCl3; in this way, it can be avoided that due to the fact that AlCl3 in molten salt is insufficient, free KCl is formed, the molten salt is large in viscosity and poor in flowability, and free particles block pipelines and valves of equipment; the prepared fused salt is free of free KCl, precipitates and other impurities, low in vapor pressure and good in fluidity, and can be used for fused salt rectification separation of the zirconium-hafnium chloride, the operation efficiency of a rectification tower device is guaranteed, and secondary pollution of the zirconium-hafnium chloride is avoided.

The invention discloses a normal-temperature liquid aluminum-based oxyhalide inorganic electrolyte, and a preparation method and application thereof, and relates to the technical field of inorganic electrolytes. The general chemical formula is Li < x > Al (1-my) A < y > B < ny > Cl (3-x-3my) O < x >, xlt; 0.6, 0 < = y < lt >; 0.3, 2 < = n < = 5, 1 < = m < = 3; m is an integer, and n is an integer; a is at least one of Al, Ta, Nb, Hf, Zr, In, Zn, Y, B and Sc; and B is at least one of Cl, Br, S, I and N. The electrolyte disclosed by the invention is in a liquid state with relatively high viscosity at room temperature, has viscoelasticity and shows excellent ionic conductivity. The raw materials are simple, the cost is low, the synthesis is simple, convenient and rapid, the energy consumption is low, and the HCl gas generated by anion exchange has low boiling point and is not easy to remain in the system. After being doped with anions and cations, the liquid viscoelasticity is still kept at room temperature, and the ionic conductivity is still excellent.

A process for recovering high grade alumina products (HPA and / or SGA) from an aluminiferous material feedstock, such as kaolinite or halloysite, is described. The process comprises leaching the calcined material in recovered 18% hydrochloric acid, removing anionic impurities such as iron and zinc by ion exchange, removing magnesium and calcium using a new step, subjecting the resulting solution to pyrohydrolysis, and then washing and calcining the crude alumina solid. Optionally, the solids washed by caustic leaching are subjected to a final purification step and then hydrolyzed into gibbsite.

The application discloses a method for preparing aluminum trichloride from hydrochloric acid, and relates to the technical field of chemical synthesis, and comprises the following steps: taking industrial by-product hydrochloric acid with a concentration of 31%, sequentially filtering through a microfiltration membrane and removing impurities through cation exchange resin to obtain purified hydrochloric acid; taking industrial-grade aluminum oxide powder, low-temperature calcining the aluminum oxide powder at 300-400 DEG C for 1-2 hours to obtain activated aluminum oxide powder. The method removes trace organic impurities from the industrial by-product hydrochloric acid through deep impurity removal, and also activates the industrial-grade aluminum oxide powder through low-temperature calcining, and the process scheme considers the uniformity of material mixing and the low volatility of HCl in the reaction stage, improves the reactivity of raw materials, reduces the loss of HCl volatilization, effectively improves the problem of low reaction conversion rate in the traditional process, avoids the waste of raw materials, reduces the influence of impurities on the purity of subsequent products, makes the products meet the demand of higher application scenarios, and improves the economic benefit and the synthesis quality of industrial production.

The invention discloses a tail gas collecting device for aluminum trichloride processing, and belongs to the technical field of separation equipment.The tail gas collecting device for aluminum trichloride processing comprises a compensation assembly, the compensation assembly is located on the downstream portion of an introduction pipe and comprises a gas supplementing piece and a communicating piece, and the gas supplementing piece is externally connected with a supplier to introduce inert gas; and a heating wire is wrapped outside the communicating piece. Through the design of the compensation assembly, dry inert gas is introduced into tail gas and is matched with the communication piece for heating, inert gas jet flow and the tail gas are fully mixed, the water vapor concentration in the tail gas is effectively diluted, high-temperature conveying of the tail gas is maintained in cooperation with the external auxiliary heating design, and hydrolysis of aluminum trichloride is inhibited from the source; and meanwhile, desublimation and blockage in advance at the pipeline joint are avoided, and smooth airflow is guaranteed.

The invention provides a method for recovering anhydrous aluminum trichloride from waste liquid containing aluminum trichloride. The method comprises the following steps: (1) removing a solvent from the waste liquid containing aluminum trichloride to obtain a product A; (2) roasting the product A at a high temperature in a certain atmosphere to obtain a product B; and (3) mixing the product B with a reducing agent, and introducing chlorine at high temperature for chlorination to obtain anhydrous aluminum trichloride.

The present invention discloses a hydrogenation reaction residue recovery and treatment system and method, belonging to the technical field of waste liquid recovery and treatment. The system includes: an evaporation kettle, an aluminum removal reactor, a first distillation column, a titanium removal reactor, a second distillation column, a high-boiling substance catalytic cracking reactor, a third distillation column, a condenser, a chlorosilane storage tank, a slurry tank, a screw conveyor and a hydrolysis tank. The present invention fills the blank of the recovery and treatment of chlorosilane residues, and realizes the stable operation of silane production by the disproportionation method through the recovery and treatment process of chlorosilane residues, ensuring the product quality. The recovery and treatment of chlorosilane residues in the present invention is of great significance for energy conservation, consumption reduction and emission reduction in silane production.

This invention provides a method for preparing high-purity alumina using kaolin. The method comprises the following steps: S1: Pre-treating kaolin to obtain pre-treated kaolin; S2: Adding hydrochloric acid solution to the pre-treated kaolin for acid purification, followed by activation to obtain activated kaolin; S3: Adding hydrochloric acid solution to the activated kaolin for acid dissolution, followed by concentration and sedimentation to obtain crude aluminum chloride solution and silica filter cake; S4: Purifying the crude aluminum chloride solution to obtain a high-purity aluminum chloride solution; S5: Preparing high-purity alumina using the high-purity aluminum chloride solution. This invention can reduce the production cost of high-purity alumina, and the obtained high-purity alumina has a purity ≥99.9%, which is beneficial for expanding the industrial application of high-purity alumina.

The present technology relates to systems, devices and methods for the production of highly dehydrated and pure magnesium chloride and aluminum chloride.