94results 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.

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.

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 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.

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 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.

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.

Provided herein is a process for producing a high-purity alumina, comprising the steps of: (a) sublimation of anhydrous aluminium chloride at a predetermined temperature to recover pure aluminium chloride; (b) dissolving aluminium chloride from step (a) in water to obtain aluminium chloride solution; (c) introducing HCI gas into aluminium chloride solution of step (b) to crystallize aluminium chloride hexahydrate; and (d) calcining aluminium chloride hexahydrate of step (c) to obtain high purity alumina.

In one aspect, the disclosure relates to a method for supplementing syngas to produce a precursor composition for synthesis of at least one industrially useful chemical, the method comprising contacting the syngas with an external source of hydrogen. In an aspect, industrially useful chemical comprises methanol and the external source of hydrogen comprises hydrogen produced by steam methane reforming (SMR), hydrogen produced by steam injected onto molten metals, or another hydrogen source. In some aspects, the external source of hydrogen comprises hydrogen produced by a halogen acid contacting scrap metal, wherein the halogen acid can be produced by gasifying a halogen-containing polymer such as, for example, polyvinylchloride (PVC), polyvinylidene chloride (PVDC), or any combination thereof. Also disclosed herein are systems useful for carrying out the disclosed methods.

A device and method for efficient clean utilization of fluor carbon cerium ore double chlorination method, relate to the field of rare earth comprehensive utilization and recovery, the device is composed of a first continuous packing bed, pipeline device; second continuous packing bed; third continuous packing bed; first screw propelling type condenser; second screw propelling type condenser. Rare earth concentrate is chlorinated with aluminum chloride, carbon monoxide and chlorine gas generated in the first and second continuous packing beds in the third continuous packing bed. Chlorinated rare earth, aluminum fluoride and alkaline earth metal chlorides generated by chlorination reaction remain in the chlorination slag in solid form, and titanium tetrachloride, silicon tetrachloride and iron chloride leave the chlorination furnace in gaseous form. The gaseous chlorination products are condensed and recovered by the screw propelling type condenser. The solid phase products are separated by water immersion to obtain single rare earth chloride. The present application realizes the comprehensive utilization of rare earth elements and associated elements such as titanium, fluorine, silicon and iron in fluor carbon cerium ore, and no acid and alkali waste liquid and wastewater are generated in the reaction process, which has good environmental benefits.

This invention provides a method for preparing alumina and removing chloride ions from kaolin and coal gangue, relating to the fields of inorganic chemical production and solid waste resource utilization. The method uses kaolin and coal gangue as raw materials, which are crushed and ground, calcined at high temperature, leached with hydrochloric acid, separated from aluminum and silicon, concentrated and crystallized with aluminum chloride, and calcined at low temperature to obtain acid-process alumina. Residual chloride ions are then removed through a precisely temperature-controlled water leaching dechlorination process, ultimately producing alumina superior to first-grade alumina via the Bayer process. The activity and dissolution rate of the acid-process alumina are ensured by controlling the calcination temperature of the aluminum chloride crystals at 730℃~780℃. A dechlorination process using 5~7 times the amount of water and constant temperature stirring at 95℃ for 45 minutes reduces the chloride ion content from 1%~2% to approximately 0.015%. This invention achieves full resource utilization of kaolin and coal gangue solid waste, efficient separation of aluminum and silicon components, and co-production of silica from the sludge. The process is simple, energy-efficient, and produces high-quality products, making it suitable for large-scale industrial production.

i) A step of reacting sewage sludge incineration ash containing at least one iron compound and an aluminum compound with at least one alkali metal chloride and / or at least one alkaline earth metal chloride at a temperature of 200°C to 1100°C in an inert gas atmosphere, and ii) Step of extracting and isolating the iron chloride and aluminum chloride formed in the exhaust gas stream. A process for producing iron chloride and aluminum chloride, characterized by including the following:

A method for producing a doped-aluminous material. In particular, the present invention relates to a method for producing doped-aluminium oxyhydrochlorides and doped-alpha alumina.

This invention provides a potassium chloroaluminate molten salt and its preparation method. The preparation method includes: uniformly mixing dry AlCl3 and KCl raw materials and adding them to a crucible; heating the mixture in the crucible to melt the raw materials and form an AlCl3-KAlCl4 mixed molten salt; adding KCl to the molten salt in small amounts several times until no volatiles are produced in the crucible, forming a KAlCl4 molten salt; and then hot-filtering the pure KAlCl4 molten salt to obtain a pure, transparent, and impurity-free potassium chloroaluminate salt. The raw materials require an appropriate excess of AlCl3 to ensure the quality of the raw materials. After the melt is formed, there is a small amount of free AlCl3 in the molten salt. The free AlCl3 is combined with KCl by adding small amounts of KCl in multiple batches to form pure KAlCl4. This avoids the formation of free KCl due to insufficient AlCl3 in the molten salt, which would lead to high viscosity, poor fluidity, and free particles clogging the pipes and valves of the equipment. The molten salt prepared by this invention is free of free KCl, precipitates and other impurities, has low vapor pressure and good fluidity, and can be used for the molten salt distillation separation of zirconium hafnium chloride, ensuring the operating efficiency of the distillation tower and avoiding secondary pollution of zirconium hafnium chloride.

The invention discloses a production process of anhydrous aluminum trichloride, and belongs to the technical field of inorganic chemical industry. According to the process, high-purity aluminum ingots and liquid chlorine are used as raw materials, and the high-purity anhydrous aluminum trichloride is efficiently and safely prepared through strict aluminum ingot surface cleaning and drying, deep drying of chlorine, chlorination reaction at specific high temperature and cooling, impurity removal and crystallization steps including specific temperature interval control. The core of the invention is to abandon a traditional alumina carbon chlorination route, adopt a pure aluminum method and optimize quality control and tail gas treatment in the whole process, and solve the problems of low product purity, high energy consumption, serious equipment corrosion, environmental pollution and the like in the prior art. The obtained product is stable in purity and suitable for the field of high-end fine chemical engineering.

The invention relates to a method for extracting crystalline aluminum chloride from fly ash, and belongs to the technical field of fly ash resource utilization. The method comprises the following steps: firstly, carrying out pretreatment steps of crushing, screening and vacuum drying on fly ash; then treating the fly ash by adopting a two-stage countercurrent leaching process; acid liquor is recycled through countercurrent washing, and the use amount of new acid is reduced; then through serial impurity removal of P204 extraction, D201 resin adsorption and sulfide precipitation, the impurity ion removal rate is remarkably increased; and then a step-by-step evaporative crystallization process is adopted to obtain high-purity crystalline aluminum chloride. Compared with a traditional single-stage process, the method has the advantages that the aluminum extraction rate is remarkably increased, the product purity reaches the industrial grade standard, and collaborative innovation of solid waste recycling and clean production is achieved.

The invention discloses a method for producing high-purity aluminum chloride by hydrochloric acid system corrosion aluminum foil waste acid liquid. The method comprises the following steps: filtering the waste acid liquid through a nanofiltration membrane to obtain first thin liquid and first thick liquid; the first thin liquid is recycled to a liquid preparation system of a workshop for repeated utilization, and the first concentrated liquid is collected for subsequent treatment; evaporating and concentrating the first concentrated solution through a graphite evaporator, and cooling to obtain aluminum trichloride hexahydrate crystals; separating the aluminum chloride hexahydrate crystal by a centrifugal machine to obtain solid aluminum chloride hexahydrate and mother liquor; and feeding the mother liquor into the graphite evaporator again, repeating the operations in the steps S2 and S3, and separating by a centrifugal machine to obtain solid aluminum chloride hexahydrate and distilled water. The method for producing high-purity aluminum chloride from the hydrochloric acid system corrosion aluminum foil waste acid solution has the advantages of low treatment cost and environmental protection.

Provided herein is a process for producing high purity alumina, comprising: (a) sublimating anhydrous aluminum chloride at a predetermined temperature to recover pure aluminum chloride; (b) dissolving the aluminum chloride from step (a) in water to obtain an aluminum chloride solution; (c) introducing HCl gas into the aluminum chloride solution of step (b) to crystallize aluminum chloride hexahydrate; and (d) calcining the aluminum chloride hexahydrate of step (c) to obtain high purity alumina.