159results about "Alkali metal silicates" patented technology

The invention belongs to the technical field of carbon-coated lithium ferrous silicate, and discloses a preparation method and application of carbon-coated lithium ferrous silicate, the preparation method of carbon-coated lithium ferrous silicate comprises the following steps: S1, adding a surfactant into a silicon source to obtain a solution A; s2, sequentially adding an iron source and a lithium source into the solution A, and uniformly mixing to obtain a carbon-coated lithium ferrous silicate precursor; s3, carrying out high-temperature sintering on the carbon-coated lithium ferrous silicate precursor to obtain carbon-coated lithium ferrous silicate; the surfactant in the step S1 is a block type polyurethane surfactant, and a hydrophilic part structure in the block type polyurethane surfactant comprises polyethylene glycol PEG and 2, 2-dimethylolbutyric acid DMBA. According to the preparation method of the carbon-coated lithium ferrous silicate, the block type polyurethane surfactant is adopted in the step S1 and is not only used as a surfactant, but also used as a reducing agent and a carbon source, and a carbon coating layer of the prepared carbon-coated lithium ferrous silicate is uniform in thickness and excellent in electrochemical performance.

The invention provides a positive electrode active material, a preparation method thereof, a positive electrode plate containing the positive electrode active material, a full-tab battery cell and an electric device, and relates to the technical field of lithium ion batteries. The positive electrode active material is of a double-spherical particle structure with a glass-phase neck bridge at a contact neck part, each spherical particle comprises an active material body and a coating layer coating the active material body, and the active material body is lithium iron phosphate dispersed with Fe2P; the average thickness tsh of the coating shell layer is equal to 5 to 9 nm; the thickness tcheck of the glass phase neck bridge is 5-25nm, and the total content G of the glass phase in the positive electrode active material is 1.5-2.2 wt%; the volume average particle size of the positive electrode active material is 7-9 [mu] m. According to the positive electrode active material disclosed by the invention, through the cooperation of the coating shell layer, the embedded Fe2P nano second phase and the glass phase neck bridge, the comprehensive performance of a full-tab battery cell and an electric device can be effectively improved.

The invention provides a positive electrode material and a preparation method thereof, a battery monomer, a battery device and a power utilization device. The positive electrode material comprises a sodium transition metal oxide and a silicate material located on the surface of the sodium transition metal oxide, the positive electrode material has the following chemical formula: NaxMyNzO2 / (aNa2O.nSiO2-XrOt.SiO2) b, M comprises one or more of Fe, In, Co, Mn, Ni and Cr, N comprises one or more of Cu, Li, Ti, Zr, K, Sb, Nb, Mg, Ca, Mo, Zn, W, Bi, Sr, Sn, Ga and Al, and X comprises one or more of Na, Li, K, Mg, Ca, Zn, Al, Cr, Sr, Sn and Sb; 0.58 < = x < = 1.05, 0 < y < = 1, 0 < = z < = 1, 0 < y + z < = 1, 1 / 3 < = r / t < = 2, 1 < = n / a, and 0 < b < = 0.2. The positive electrode material provided by the invention can improve the rate capability and the processability of the battery monomer.

This invention discloses a method for extracting an alkaline solution from sodium silicate waste sludge and calcium carbide slag, a byproduct of acetylene production via calcium carbide hydrolysis. It relates to the field of industrial solid waste utilization technology and includes: (1) processing each batch of new sludge powder raw material using a countercurrent extraction process to obtain a concentrated leachate A rich in sodium carbonate and sodium silicate, and a final residue Z rich in silica; (2) subjecting the concentrated leachate A to ultrasonic treatment to separate and obtain a clear alkali metal salt solution B; (3) adding calcium carbide slag powder to the clear alkali metal salt solution B and performing a heating and stirring reaction to obtain a supernatant C containing sodium hydroxide; (4) heating and evaporating the supernatant C to concentrate and obtain a sodium hydroxide solution product. This invention can convert two types of waste residues into sodium hydroxide and sodium silicate solutions with clearly defined compositions and significant alkalinity. The purity of these solutions is sufficient to meet the application needs of industrial fields where the purity of the alkali solution is not high, thus broadening the pathways for high-value utilization of waste.

This invention discloses a process for preparing solid sodium silicate based on controllable particle size water quenching, belonging to the field of inorganic silicate chemical technology. The specific steps are as follows: S1: raw material melting and homogenization; S2: controllable particle size water quenching; S3: solid-liquid separation and online classification; S4: deep drying and packaging. This invention achieves innovation and simplification of the production process: through a one-step "atomization-cooling" forming method, the high-energy-consuming crushing and screening processes in traditional processes are completely eliminated, shortening the process flow and reducing equipment investment and maintenance costs; it significantly improves the overall quality of the product: directly generating solid particles with high sphericity and smooth surface, the product has good flowability, stable bulk density, high whiteness, and no tendency to agglomerate during subsequent dissolution, with a faster dissolution rate and superior application performance.

The invention relates to a method for synergistically recycling a photovoltaic waste material and a waste lithium iron phosphate battery positive electrode material, and belongs to the technical field of recycling of photovoltaic waste materials and waste lithium iron phosphate. According to the method, the photovoltaic waste and the waste lithium iron phosphate battery positive electrode material are used as raw materials, and under the vacuum condition, silicon (Si) in the photovoltaic waste is used for reducing the waste lithium iron phosphate battery positive electrode material to generate lithium silicate slag (Li2SiO3 and Li2Si2O5), elemental phosphorus (P4) and ferrosilicon alloy (Si-Fe). According to the method, valuable components in the photovoltaic waste and the waste lithium iron phosphate battery positive electrode material are effectively utilized, and efficient separation and recycling of lithium, iron, phosphorus and silicon are achieved; and the recovery process is simple.

The invention belongs to the technical field of lithium batteries, and particularly relates to a silicon-carbon composite negative electrode material protected by an interface lithium conducting layer and a preparation method of the silicon-carbon composite negative electrode material. The silicon-carbon composite negative electrode material comprises a silicon-carbon inner core and an interface lithium-conducting sub-layer, the inner core is composed of a porous carbon base material and nano silicon, and the interface lithium-conducting sub-layer contains a lithium-conducting compound. The continuous interface lithium conducting layer is constructed on the silicon carbon surface in situ, so that the interface lithium ion transmission kinetics of the silicon carbon material is remarkably improved, and meanwhile, the interface layer can be used as a rigid mechanical protection layer, so that the mechanical stability of the interface lithium conducting layer is favorably maintained, and the volume expansion of the silicon carbon is favorably inhibited; therefore, the rate capability and the cycling stability of the lithium ion battery using the silicon-carbon material are remarkably improved; and meanwhile, the interface lithium conducting layer is beneficial to avoiding direct contact between silicon carbon and a solid electrolyte and avoiding side reaction, so that the cycling stability of a solid-state battery using the material is improved.

The invention provides an in-situ carbon-doped modified lithium ferrous silicate preparation method which comprises the following steps: S1, preparing phenolic resin / silicon dioxide composite hollow spheres by adopting resorcinol, formaldehyde and a silicon source, then adding an iron source and a lithium source for reaction, and synthesizing by adopting a hydrothermal method to obtain a modified lithium ferrous silicate precursor; and S2, calcining the modified lithium ferrous silicate precursor prepared in S1 in an inert gas atmosphere to obtain the in-situ carbon-doped modified lithium ferrous silicate material. According to the method, the phenolic resin / silicon dioxide composite hollow sphere precursor is prepared, a stable Si-C bond is formed in the precursor, and the in-situ carbon-doped modified lithium ferrous silicate material is prepared by taking the Si-C bond as a silicon source, so that compared with heteroatom-doped carbon layer modification, the method disclosed by the invention has the advantages that side reactions can be reduced, breakage of a carbon layer is avoided, and the service life of the lithium ferrous silicate material is prolonged. Modification is more uniform, the preparation process is simple, and the cost is lower.

The present invention relates to a lithium silicon oxide that suppresses gas generation when an aqueous slurry is applied, an anode including the same, and a lithium secondary battery including the anode. The present invention also provides a lithium silicon oxide that has peaks at 2θ positions of 23.8±0.5°, 24.3±0.5°, and 24.7±0.5° in an XRD pattern measured using non-monochromated CuKα radiation and satisfies Mathematical Formula 1, an anode including the same, and a lithium secondary battery including the anode.

The invention relates to sodium silicate production filtering equipment and a method thereof, and belongs to the technical field of filter press equipment and control methods thereof, the sodium silicate production filtering equipment comprises a main body frame, the main body frame comprises two parallel bearing steel beams, and two ends of the bearing steel beams are respectively connected with a head baffle and a tail baffle; the filter plate group is arranged between the two bearing steel beams and can slide along the bearing steel beams; the hydraulic pressing part is mounted on the tail baffle and is used for pushing a pressing plate to apply pressure to the filter plate group; the feeding pipeline is connected to the feeding port of the head baffle, and a feeding pump, an electromagnetic flowmeter and an inlet pressure sensor are sequentially arranged on the feeding pipeline; the pump power monitoring unit is installed on a power supply cable of the feeding pump and used for collecting the working current of a motor, and invalid intervention operation is avoided through an accurate decision-making mechanism.

Method for producing a chemically and physically stable, neutral, non-saline inorganic product from bauxite residues (1), comprising the steps of: (i) providing (1100) a washed and thickened bauxite residue (1), (ii) in a so-called acidification step (1200), reacting the washed and thickened bauxite residue (1) with a sufficient quantity of a monoprotic Bron sled acid (10) to achieve a final target pH between 5.5 and 8.5 at an addition rate such that the pH never drops below a value of 3.0, (iii) in a so-called separation step (1300), separating soluble reaction products from the remaining solids( 7), (iv) in a so-called post-acidification washing step (1400), washing the remaining solids (7) obtained in the separation step with a washing liquid (17). Said product (21) can be used as a growth medium or soil for growing plants, in pure form or in mixture with natural soil materials of geological or biological origin.

The present invention relates to the field of negative electrode materials and provides a negative electrode material, a manufacturing method thereof, and a battery. The negative electrode material includes a silicon-based active material and a lithium silicate, and further includes Mg, Al, and P, wherein the mass content of Mg in the negative electrode material is a%, the mass content of Al in the negative electrode material is b%, and the mass content of P in the negative electrode material is c%, and a, b, and c in the negative electrode material satisfy the relationship 0.3≦(a+b) / c≦1.5 and 0.5≦a+b+c≦10. The introduction of Mg, Al, and P into the negative electrode material provided by the present invention is beneficial to the formation of lithium ion transmission channels and can improve the rate performance of the negative electrode material.

Provided are a negative electrode active material which includes negative electrode active material particles which includes a silicon oxide (SiOx, 0<x≤2); and at least one lithium silicate selected from Li2SiO3, Li2Si2O5, and Li4SiO4 in at least a part of the silicon oxide. A signal generated in a region of 200 to 600 cm−1 according to a Raman spectrum is subjected to deconvolution into three peaks, which are set to peak A, peak B, and peak C from lowest to highest of an absolute value of a wavenumber. Also disclosed are a method of preparing the same, and a negative electrode and a lithium secondary battery including the negative electrode active material.

The invention belongs to the field of separation and purification, and particularly relates to a biomass reducing agent for preparing industrial silicon and a preparation method of the biomass reducing agent. Carrying out alkali treatment on the rice husk carbon precursor to prepare rice husk carbon containing sodium silicate, and separating to obtain the rice husk carbon and a sodium silicate solution; modifying the rice husk charcoal to convert residual sodium silicate into silicon dioxide, so as to obtain modified rice husk charcoal; performing hydroxylation modification on the straw carbon, then mixing with the modified rice husk carbon, putting into a sodium silicate solution, fully mixing, and forming, thereby obtaining the product. The strength of the biomass reducing agent disclosed by the invention is greatly improved, so that the biomass reducing agent can meet the production requirements of industrial silicon and can better replace charcoal, and resource utilization of agricultural and forestry wastes is realized.

The present invention provides a method (600a) and apparatus for producing an alkaline mixture comprising sodium silicate, which mixture is suitable for use as an alkaline activator for alkaline activated and geopolymer cements, but which may also be used, for example, to mineralize captured carbon dioxide. The method comprises comminuting (301) an ore of a target metal into fines, wherein the ore comprises a siliceous mineral and at least one of iron and manganese as the target metal. The siliceous mineral may comprise the target metal itself and / or it may be silica and / or another silicate mineral present as gangue. The ore is dehydrated and hydroxylated compounds contained therein are dehydroxylated (302). The ore thus treated is then reacted (601) in an inert atmosphere with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and an oxide of the target metal from the ore, to precipitate out from the liquid sodium a solid phase comprising both the target metal in elemental form and other insoluble products comprising sodium oxide. The redox reaction is conducted at a temperature of at least 320 °Celsius to induce a reaction between the sodium oxide and silica derived from the siliceous mineral to produce sodium silicate, but also below a temperature at which the liquid sodium can react with the oxide of the target metal to produce a ternary oxide thereof. At least some of the liquid sodium having sodium silicate dissolved therein is then separated (305) from the solid phase and is reacted (602) with at least one of oxygen and water to produce a mixture comprising sodium silicate and at least one of sodium oxide and sodium hydroxide. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), means for dehydrating and dehydroxylating the ore (such as a dryer), a gas-tight first reaction vessel for reacting the ore thus treated with the liquid sodium, a solid-liquid sodium phase separator, and a second reaction vessel for reacting the liquid sodium having sodium silicate dissolved therein with at least one of oxygen and water. The resulting alkaline mixture is therefore produced whilst extracting the target metal in elemental form from its ore. Thus the energy consumed is split between the production of these two co-products, making the method of the invention a low-energy method of producing an alkaline activator for alkaline activated and geopolymer cements. Both reactions (601, 602) are also significantly exothermic and at least some of the thermal energy from them may be recycled. The invention does not consume any carbon and is therefore at least carbon-neutral. On the other hand, it consumes the silica content of gangue mineral species and / or of siliceous minerals of the target metal in its ore, which have previously been treated as waste products. The amount of waste material produced when extracting the target metal from its ore is thereby reduced as well.

Improved cycle characteristics. [Solution] The positive electrode active material includes lithium manganese phosphate. The lithium manganese phosphate has a crystal structure belonging to the space group Pnma. In the crystal structure, a first dopant and a second dopant are doped at the manganese site. The first dopant and the second dopant have different valences. The first dopant has an ionic radius of less than 0.830 Å (83 pm). The second dopant has an ionic radius of more than 0.645 Å (64.5 pm).

The application relates to a lithium ion battery negative electrode material and a preparation method thereof and a lithium ion battery. The negative electrode material is a core-shell structure, the negative electrode material is prepared by mixing silicon monoxide and lithium alloy Li x M, the shell comprises a plurality of nano M particles, and the material of the core comprises M and Li x MO y . The method is to heat treat silicon monoxide and lithium alloy, such as lithium-silicon alloy, after mixing, the liquefied lithium alloy is wrapped on the surface of the silicon monoxide, lithium in the lithium alloy reacts with the silicon monoxide to form a core-shell structure with M and Li x MO y in the inside and the residual element M in the lithium alloy in the outside. The method is not only simple in operation, but also can effectively prevent the internal pre-lithiated silicon monoxide component from contacting the air environment, improve the stability of the material, and the residual element M shell can also participate in the electrochemical cycle process as a battery active substance, thereby improving the capacity and the first coulomb efficiency of the silicon monoxide.

A positive electrode active material, a method for preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same are provided. The positive electrode active material has a core-shell structure, comprising a core, a first cladding layer covering the core, a second cladding layer covering the first cladding layer, wherein the core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, the first cladding layer comprises a first polymer containing an electron withdrawing group, the second cladding layer comprises a second polymer, and wherein the second polymer comprises one or more of plant polysaccharides, marine polysaccharides and the derivatives thereof. The positive electrode active material of the present application enables a secondary battery to have a relatively high energy density, while further having a significantly improved rate performance, cycling performance and / or high-temperature stability.

The invention discloses a solid waste salt recycling method and system for producing epoxypropane through an HPPO method, and belongs to the technical field of solid waste salt recycling. The recycling method comprises the following steps: introducing the HPPO waste salt and desalted water for dissolving the HPPO waste salt into a dissolving kettle, transferring the dissolved solution into a crystallization kettle through a Y-shaped filter and a centrifugal pump, introducing methanol into the crystallization kettle to separate out salt crystals, introducing the salt crystals into a centrifugal machine through a slurry pump, and centrifuging to obtain pure salt; pure salt and quartz sand are introduced into a reaction kettle for a high-temperature reaction, sodium silicate is prepared, and the sodium silicate is transferred to a storage tank. The method is used for solving the technical problems that in the prior art of an HPPO method, waste solid salt treatment is difficult, cost is high, and environmental pollution is large, and waste solid resource recycling is achieved.

This negative electrode material for non-aqueous electrolyte secondary battery comprises a composite particle and an electric conductive layer arranged on the surface of the composite particle, wherein the composite particle comprises a silicate phase and a silicon phase dispersed within the silicate phase, and the electric conductive layer contains a calcium component.

The present application relates to the technical field of water glass preparation, and particularly discloses a preparation method and a production device for producing water glass with low energy consumption, comprising a reaction tank. A manhole structure is arranged on the top of the reaction tank, the manhole structure is composed of a plug and a manhole, the plug is connected to the manhole under the drive of a hydraulic oil cylinder, and the manhole is blocked. An infrared temperature sensor and a pressure transmitter are arranged in a mounting groove at the bottom of the plug, and are used for detecting the temperature and the air pressure in the reaction tank, respectively. A line mounting cylinder is arranged and is used for connecting the wire connectors of the infrared temperature sensor and the pressure transmitter. After the line mounting cylinder is clamped into the wire connector docking groove, the sealing ring on the surface of the line mounting cylinder has a good sealing effect. The filling cavity in the line mounting cylinder is filled with a high-temperature-resistant waterproof sealant. After the plug is connected to the manhole, a sealed space is formed in the reaction tank, the pressure of the water glass raw material can be maintained, the leakage of the temperature and the air pressure is prevented, the reaction efficiency is improved, and the energy consumption is reduced.

The invention discloses a solid sodium silicate preparation process based on particle size controllable water quenching, and relates to the technical field of inorganic silicate chemical industry, and the preparation process comprises the following specific steps: S1, melting and homogenizing raw materials; s2, particle size controllable water quenching; s3, carrying out solid-liquid separation and online grading; and S4, deep drying and packaging. According to the invention, the innovation and simplification of the production process are realized: through an atomization-cooling one-step forming method, high-energy-consumption crushing and screening procedures in the traditional process are thoroughly eliminated, the process flow is shortened, and the equipment investment and maintenance cost are reduced; solid particles with high sphericity and smooth surfaces are directly generated, the product fluidity is good, the bulk density is stable, the whiteness is high, the caking tendency is avoided in the subsequent dissolution process, the dissolution rate is higher, and the application performance is excellent.

To provide an industrially advantageous method for obtaining a single-phase sodium compound having a NASICON structure by X-ray diffraction.SOLUTION: A method for producing a sodium compound having a NASICON structure and containing at least sodium, zirconium, silicon and phosphorus is provided. The method comprises calcining at 800 to 1100°C a reaction precursor which contains sodium, zirconium, silicon, and phosphorus and in which absorption peaks with maxima in the range of at least 950 to 1050 cm-1 and 1060 to 1150 cm-1 are observed in the infrared absorption spectrum.SELECTED DRAWING: Figure 2

The invention discloses an improved high-grade pyrogenic process recovery method for regenerated lithium in battery black powder, and belongs to the technical field of battery black powder. The core of the method is that plasma high-temperature volatilization and carbon thermal reduction in-situ synthesis are coupled: firstly, battery black powder and graphite are mixed, lithium is selectively volatilized in a plasma furnace at 1400-1600 DEG C, and the lithium is enriched in smoke dust; then, lithium-rich smoke dust obtained through trapping is mixed with graphite and silicon dioxide, high-temperature smoke gas at the temperature of 700-800 DEG C discharged by a plasma furnace is directly used as a fluidizing medium and a heat source, a reaction is carried out in a fluidized bed at the temperature of 700-850 DEG C, and a high-grade lithium silicate product is synthesized in one step. According to the invention, cascade and closed-loop utilization of system energy is realized, additional fuel is not needed, an unstable intermediate product is directly converted into stable lithium silicate with high additional value, a complex wet purification step is omitted, and the method has the outstanding advantages of high lithium recovery rate, low energy consumption, high product value and green and efficient process.

The utility model discloses a sodium silicate dissolving reaction kettle which comprises a kettle body, a driving device, a discharging assembly, a feeding assembly, a shoveling plate and a manhole, the kettle body is driven by the driving device, the shoveling plate is arranged in the kettle body to increase the reaction strength of quartz sand and caustic soda, and the purposes of shortening the reaction time, improving the reaction efficiency and reducing the unit consumption of steam are achieved. The feeding port is formed in the side wall of the kettle body and connected with the feeding pump, so that automatic closed feeding of quartz sand and caustic soda mixed slurry raw materials is achieved, a traditional feeding mode of manually opening a top cover is replaced, the feeding efficiency is improved, shoveling plate sets distributed at intervals in the circumferential direction and the kettle body rotate to form a synergistic effect, and when the kettle body rotates, the stirring effect is good. Materials are continuously lifted to a high point through the shoveling plate and then freely fall, so that the solid-liquid contact area is increased, and the dissolution reaction time is shortened.

A lithium-containing oxide having a cationic-disordered rock salt-type structure,in which, when a solid 7Li-NMR spectrum has been measured, a signal 1 having a half width of more than 0 ppm and 40 ppm or less and a signal 2 having a half width of more than 100 ppm and 2000 ppm or less are observed in a range of a chemical shift of −3000 to 3000 ppm for which a peak of a 1 mol / L LiCl aqueous solution is set to 0 ppm, andan integrated intensity of the signal 1 relative to a total of integrated intensities of the signal 1 and the signal 2 is more than 0% and 60% or less.

This paper describes a product for use in energy generation and the corresponding manufacturing process. The product primarily involves enclosing a water molecule in a lattice structure with nanocavities to provide quantum mechanical effects, and is positioned between two conductive metal layers. The product positioned between the conductive materials is a mixture of at least hydrated aluminum silicate.

The present invention provides a method (100a) and system for controlling the operation of a chemical plant arranged to carry out a chemical process which produces iron and / or manganese in elemental form from respective oxides thereof using liquid sodium as a reductant of the respective oxides and which can also produce an oxide or hydroxide of at least one of calcium, magnesium and iron from a carbonate mineral of at least one of calcium, magnesium and iron. The method (100a) comprises assigning (103a) a respective value to the no. of mol of each one of the chemical species involved in the chemical process as starting materials and products thereof, subject to constraints which are derived from the law of conservation of mass of the constituent elements of those chemical species. The method also assigns (103b) respective values to the nos. of mol of chemical species which are consumed during the chemical process by electrolytic or thermochemical decomposition into their constituent elements, subject to another set of constraints which are derived from the minimum requirements for these constituent elements by the chemical process itself. The former set of constrains allows the materials balance of the process to be controlled and the latter set of constraints allows the energy balance of the process to be controlled. The method then comprises operating (104) the chemical plant to carry out the process according to the values thus assigned. Respective values may be assigned (103a, 103b) to the nos. of mol of a preferred subset of the chemical species involved in the process as starting materials and products thereof and / or a preferred subset of the chemical species which are consumed during the process by electrolytic or thermochemical decomposition into their constituent elements, before values are then assigned to remaining ones of the nos. of mol of other chemical species not in the preferred subset. This allows the chemical plant to be operated in such a way as to optimise its performance relative to such variables as the respective nett amounts of a preferred one or more of the materials it consumes and / or produces, the energy efficiency of a part or the whole of the chemical process and / or its cost effectiveness, for example. Amongst other things, the constraints also ensure that the chemical process always produces less carbon dioxide than instead calcining a carbonate mineral of at least one of calcium, magnesium and iron to produce its corresponding oxide, and that in a large number of cases, it can produce no carbon dioxide at all. Also disclosed is a graphical technique which may be used to assign the respective values to the nos. of mol of the chemical species involved in the chemical process subject to the stated constraints, whereby the method and system of the invention may be implemented.

The utility model discloses water glass purification equipment, which relates to the field of water glass purification, aims to solve the problem of low purification efficiency of the existing purification equipment, and adopts the technical scheme that the water glass purification equipment comprises a supporting barrel, two electric push rods are fixedly connected onto the supporting barrel, and a connecting plate I is fixedly connected onto the two electric push rods; a motor is fixedly connected to the two first connecting plates, and a purification assembly used for purifying the water glass is arranged on an output shaft of the motor. According to the water glass purification equipment disclosed by the utility model, during purification, the purification assembly can be driven by the motor to do centrifugal motion, so that water glass in the purification assembly is thrown out to the inner wall of the supporting barrel and then flows into the storage barrel, and impurities are remained in the purification assembly because the impurities cannot pass through the purification assembly; by adopting the method, the water glass purification efficiency can be remarkably improved.

The invention relates to caustic leached RHA absorbent materials obtained as a residue during alkaline silica production in hydrothermal process, and use of residue as CO2 absorbent material.