67 results about "Alkali carbonate" patented technology

A powdery hydraulic composition that includes: a powder raw material A having at least one or more selected from fly ash and slag fine powder, and a powder raw material B having at least one or more selected from alkali silicate powder and alkali carbonate powder, and by mixing with water, hardening is possible even at ordinary temperature, and it is not necessary to use alkali solution comprising sodium hydroxide, etc.

The invention relates to an LDHs (Layered Double Hydroxides) bifunctional catalyst for preparing CO through CO2 selective absorption in-situ relay coupling low-energy-consumption conversion as well as a preparation method and application of the LDHs bifunctional catalyst. Controlling the thickness of a laminate to prepare an ultrathin NO3-intercalated LDHs carrier, adding a metal salt solution in N2 atmosphere, and reducing metal to obtain the catalyst. The method comprises the following steps of: applying the LDHs to a reaction device, introducing CO2-containing feed gas, realizing the trapping process that CO2 is stored between the LDHs in the form of CO3 < 2-> in the presence of water vapor, and then performing low-temperature in-situ conversion on the CO3 < 2-> in the interlayer into a high-added-value product in an H2 atmosphere. After the reaction, the catalyst continues to selectively capture CO2 and is repeatedly used, and CO2 capture-in-situ conversion integration is achieved. According to the invention, H < + > transfer and interlayer carbonate reduction are promoted; meanwhile, desorption of a CO intermediate on the surface of the catalyst is accelerated, subsequent reaction steps are prevented, and therefore the process of preparing CO from CO2 at low temperature is achieved, energy consumption is low, efficiency is high, and selectivity is high.

The present invention relates to a carbonate-based hydrogen ion battery and a preparation method thereof. The positive electrode active material and the negative electrode active material of the hydrogen ion battery are basic carbonates or bicarbonates containing variable-valence transition metal elements, and the aqueous electrolyte thereof is a buffer solution containing soluble carbonates or bicarbonates. Compared with the prior art, the hydrogen ion battery of the present invention has a high efficiency in the process of charging and discharging, and the hydrogen ions migrate in the positive / negative electrode active materials and the electrolyte, and CO3 2‑ and HCO3 ‑ The transformation is achieved to realize the material and charge balance of the active material during the redox electrochemical reaction; low-cost, long-life, and high-power density electrochemical energy storage is achieved.

The invention is to a carbon capture composition to capture carbon dioxide from an input gas mixture. The carbon capture composition comprises water; an alkali carbonate; and a cross-linked superabsorbent polymer. Also disclosed is a carbon capture system including such carbon capture compositions. Such carbon capture systems are simple, requiring no moving parts, and constructed from existing materials and manufacturing methods, enable an economically sustainable low cost of carbon capture from industrial point sources, road transport vehicles or directly from atmospheric air.

The invention relates to a CO2 sensor having low electrical resistance and high resistance to air humidity. The invention also relates to processes for manufacturing same. The sensor comprises a gas-sensitive material containing at least one substance from the group consisting of semiconducting metal oxides, rare earth oxides or rare earth oxycarbonates, said substance containing at least two different alkali metals. In particular, this substance is doped with at least two alkali metals and / or loaded with at least two alkali carbonates. In a preferred process for manufacturing the gas-sensitive material, at least one rare earth oxide or at least one semiconducting metal oxide is heated with at least two different alkali carbonates for doping, alkali carbonates being present at a molar ratio which results in a eutectic mixture. In an alternative process, at least one rare earth oxycarbonate or at least one semiconducting metal oxide is loaded with at least two different alkali carbonates.

The invention belongs to the field of chemical synthesis, and particularly relates to a preparation method of aromatic diether dicarboxylic acid, which comprises the following steps: (1) under the protection of inert gas, adding aromatic diphenol, p-fluorobenzonitrile, basic carbonate and a solvent 1 into a reactor, and reacting at 120-150 DEG C for 10-20 hours to obtain aromatic diether dinitrile; and (2) adding aromatic diether dinitrile, alkali metal hydroxide and a solvent 2 into the reactor, reacting at 100-150 DEG C for 10-20 hours, neutralizing with inorganic acid until the pH value is 1-2, filtering, washing with water until the pH value is neutral, and drying to obtain the product. By selecting specific reaction raw materials and process conditions, higher yield is successfully realized at lower temperature, and the method is very suitable for industrial production of aromatic diether dicarboxylic acid.

The invention relates to a method for removing impurity boron through synergistic reinforcement of biomass for industrial silicon and an additive, and belongs to the technical field of efficient and clean utilization of resources. The method comprises the following steps: crushing and grinding industrial silicon to obtain powder; and drying the biomass, and grinding to obtain powder. The method comprises the following steps: mixing industrial silicon powder and biomass powder, carrying out preliminary roasting to obtain a mixture A, naturally cooling to room temperature, adding alkali carbonate or hydroxide, uniformly mixing, putting into a high-purity graphite crucible, heating to 1350-2200 DEG C in an inert gas atmosphere, carrying out heat preservation for 0.5-4 hours, naturally cooling to room temperature after heat preservation is finished, and removing surface slag to obtain refined silicon. The removal rate of boron impurities in industrial silicon can reach 87-96%, the impurity removal method which is efficient, low in cost and easy to operate is provided, biomass such as waste coffee shells is used for impurity removal, waste recycling is achieved, and efficient and clean production is achieved.

A process for the recovery of carbon dioxide (CO2) from a carbon dioxide-containing gas, in particular air and / or exhaust gas, comprises the steps: a) contacting the carbon dioxide-containing gas with an absorbent in the form of a solution of aqueous alkali metal hydroxide solution, in particular sodium hydroxide solution and / or potassium hydroxide solution, so that carbon dioxide is absorbed from the carbon dioxide-containing gas and alkali metal carbonate, in particular sodium carbonate (Na2CO3) and / or potassium carbonate (K2CO3), is formed in the absorbent; b) carrying out an ion exchange step, wherein the alkali carbonate formed in step a) is subjected in dissolved form to a cation exchange process so that the alkali ions of the alkali carbonate are bound to a cation exchanger; c) eluting the alkali ions bound to the cation exchanger in step b) with a solution containing ammonia and / or at least one amine, whereby alkali metal hydroxide solution is recovered, which is preferably used for the renewed absorption of carbon dioxide in step a)

The invention provides a method for detecting and analyzing heavy metal chromium in high-aluminum ore and red mud, and belongs to the field of mineral analysis and detection. The method comprises the following steps: melting a mixture of a sample to be detected and a strong alkaline flux to obtain a melt; extracting and dissolving the melt by using a dilute acid solution to obtain a leaching solution; a strong oxidant and a catalyst are added into the leachate, so that chromium ions in the leachate are oxidized into hexavalent chromium ions, and hexavalent chromium conversion liquid is obtained; adding an alkali carbonate solution into the hexavalent chromium conversion solution to adjust the pH value of the hexavalent chromium conversion solution to 8-10 to obtain a mixed solution; filtering the mixed solution to obtain a chromium-containing filtrate; and quantifying the total chromium content in the chromium-containing filtrate by adopting a spectrophotometric method. The detection and analysis method provided by the invention can ensure that chromium existing in lattices of the high-aluminum ore and red mud sample is completely released, and main matrix interference elements such as aluminum, iron, calcium and magnesium in the sample can be effectively separated, so that accurate determination of the total chromium content in the to-be-detected sample is realized.

To provide a method for producing a reduction catalyst precursor that exhibits high activity without using a stabilizing agent, such as a rare earth element, and without generating a large amount of NOx during calcination.SOLUTION: A method for producing a reduction catalyst material includes: a neutralization step of neutralizing a nickel-containing compound, a zirconium-containing compound, and an alkali carbonate in the presence of a sulfate ion; a step of filtering and water-washing the product obtained in the neutralization step to remove a water-soluble component; and a step of heat-treating the product after the removal step. The content of Na2O in the oxide obtained by the heat treatment step is 1.0 mass% or less, and the content of SO3 is 0.5 mass% or less.SELECTED DRAWING: None

To provide a manufacturing method and a manufacturing system of calcium carbonate capable of synthesizing calcium carbonate having high whiteness and high hiding property.SOLUTION: A manufacturing method of calcium carbonate having high hiding property includes a step of preparing cubic calcium carbonate by mixing an aqueous solution containing calcium ion and an aqueous solution containing an alkali carbonate to control pH of the mixed solution to 11.5-13.SELECTED DRAWING: Figure 1

The invention belongs to the field of optical cable sheaths, and particularly relates to a waterproof and fireproof protective sleeve material for an optical cable and a preparation method thereof. The waterproof and fireproof protective sleeve material for the optical cable comprises the following components in parts by weight: 100-120 parts of polyethylene resin, 15-20 parts of modified polyether polyol, 10-15 parts of a plasticizer, 3-5 parts of a stabilizer, 0.5-1 part of an antioxidant and 1-2 parts of a silane coupling agent, the preparation method of the modified polyether polyol comprises the following steps: taking polyether polyol, inorganic alkali carbonate and (+ / -)-BOC-A-phosphonoglycine trimethyl ester, heating to react, and treating to obtain the modified polyether polyol. The preparation process of the stabilizer comprises the following steps: taking epoxidized soybean oil, lithium bromide and magnesium perchlorate to react at normal temperature, and treating to obtain the stabilizer. According to the technical scheme, the mechanical property is greatly improved while the waterproof and fireproof performance is improved.

The application discloses a basic lanthanum carbonate particle and a preparation method thereof. The basic lanthanum carbonate particle has an ellipsoidal appearance, a particle size of 1-4.5 microns, and a particle size distribution alpha satisfying the condition of 1.1<=alpha<=1.5. The preparation method can produce the basic lanthanum carbonate particle on a large scale under mild conditions.

The invention belongs to the technical field of waste resource utilization, and provides a separation method for valuable metals in an acid leaching solution. After the pH value of the acid leaching solution is adjusted to be alkaline, the obtained alkaline solution is mixed with gas containing carbon dioxide in a spraying or aeration mode for reaction. According to the method, magnesium ions and aluminum ions in the acid leaching solution are converted into basic carbonate and calcium ions are converted into carbonate by utilizing carbon dioxide and liquid caustic soda; compared with hydroxide, basic carbonate and carbonate cannot adsorb lithium ions and rare earth ions in an acid leaching solution, ferric hydroxide formed by a small amount of iron ions has limited adsorption on the lithium ions, and efficient separation and recovery of the lithium ions can be achieved. Furthermore, the carbon dioxide-containing gas is carbon dioxide-containing tail gas, and the separation method can utilize the carbon dioxide gas in the tail gas, so that the carbon emission is reduced.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a methanol steam reforming hydrogen production catalyst and a preparation method thereof.The preparation method comprises the following steps that Cu / Zn basic carbonate binary parent slurry with the pH value being 8-10 is prepared through a reverse addition coprecipitation method; the preparation method comprises the following steps: preparing a pseudo-boehmite sol carrier with the pH value of 4.5-6.5 by adopting a positive addition precipitation method; the binary parent slurry and the sol-like carrier slurry are fully stirred, mixed and pulped, a precious metal nitrate solution is dropwise added while heating and cooking are conducted, and the pH value is adjusted to be neutral through alkali liquor; washing, filtering, drying, calcining and forming the neutral material to obtain the methanol steam reforming hydrogen production catalyst. The catalyst prepared by the method provided by the invention has high catalytic activity in a temperature zone of 210-380 DEG C, and has the advantages of good thermal stability, strong anti-sintering ability, long service life and the like.

The invention provides an integral methanol-to-hydrogen catalyst for a vehicle as well as a preparation method and application thereof, and the preparation method comprises the following steps: firstly, cleaning a metal framework in an ultrasonic environment, cleaning the metal framework again with distilled water after cleaning, and drying; mixing the dried metal framework with an aqueous solution of alkali carbonate, and keeping for at least 10 hours in a high-temperature and high-pressure environment with the temperature of more than 120 DEG C and the pressure of more than 1 MPa; cooling to room temperature, washing with distilled water, and drying to obtain a catalyst precursor; finally, roasting the obtained catalyst precursor in an air atmosphere; and after roasting, reducing in a reducing atmosphere to obtain the integral methanol-to-hydrogen catalyst for vehicles. The prepared catalyst does not need secondary forming, the preparation method is simple, the catalyst has extremely high structural strength, the reaction performance cannot be reduced along with air speed change, meanwhile, good catalytic performance can still be kept under long-time reaction, and the catalyst is very suitable for vehicle-mounted application scenes.

The present invention relates to a polystyrene polymer formulation comprising a polystyrene comprising polymer material and from > 3 to 15 wt.-%, based on the total weight of the formulation, of at least one nucleating agent selected from the group consisting of a particulate earth alkali carbonate- comprising material, a particulate earth alkali phosphate-comprising material, a particulate hydroxide- comprising material and mixtures thereof, a polystyrene foam, a process for preparing the polystyrene polymer formulation and a process for preparing the polystyrene foam, an article comprising the polystyrene foam as well as the use of a particulate earth alkali carbonate-comprising material, a particulate earth alkali phosphate-comprising material, a particulate hydroxide-comprising material and mixtures thereof as nucleating agent in a polystyrene polymer formulation.

The present invention relates to the use of a storage stabilization agent for stabilizing an aqueous home care formulation upon storage, wherein the storage stabilization agent comprises at least two different water soluble or water dispersible ion sources selected from the group consisting of water soluble or water dispersible source of bismuth ions, water soluble or water dispersible source of lithium ions, water soluble or water dispersible source of magnesium ions and at least a water soluble or water dispersible source of alkali ions, wherein the water soluble or water dispersible source of alkali ions is selected from alkali carbonate and / or alkali bicarbonate and wherein the water dispersible source of magnesium ions is selected from magnesium carbonate or magnesite (MgCO3) and / or hydromagnesite (Mg5(CO3)4(OH)2·4H2O).

The present disclosure provides a method of increasing the rate of phase conversion and use of a carboxylate-containing substance. A method of increasing the rate of phase conversion in the course of preparing a rare earth hydroxycarbonate from a rare earth carbonate comprises: mixing a rare earth carbonate with an aqueous solution of a carboxylate-containing substance to obtain a slurry; and heating the slurry such that reactions proceed. The method of the present disclosure can improve the rate of conversion from a rare earth carbonate to a rare earth hydroxycarbonate.

The invention provides a supported alkali metal catalyst as well as a preparation method and application thereof. The supported alkali metal catalyst comprises a carrier and an active component, the carrier has a porous structure, and the carrier is a hydrophilic carrier; the active component comprises alkali carbonate, and the alkali carbonate is loaded in the porous structure of the carrier. According to the supported alkali metal catalyst disclosed by the invention, the active component alkali metal carbonate is supported in the pore channels of the hydrophilic carrier, so that the alkali metal carbonate is not easy to peel off from the carrier in a catalytic reaction process, and good catalytic activity and stability can be realized.

The application relates to a polypropylene material with high impact resistance and low melting point, a preparation method and application thereof. The polypropylene material with high impact resistance and low melting point comprises the following components in percentage by weight: 99.70-99.99% of polypropylene resin; 0.005-0.15% of nucleating agent A; and 0.005-0.16% of nucleating agent B. The nucleating agent A is a cyclohexane dicarboxylic acid metal salt; and the nucleating agent B is an alkali carbonate. The specific nucleating agent A and the nucleating agent B are compounded, the influence of the melt index fluctuation is overcome, the toughness difference between batch products is reduced, the product performance is stabilized, the polypropylene pipe material with high impact resistance, low melting point and stable quality is provided, the production cost is low, the preparation method is simple, and the large-scale application is facilitated.

The invention provides a catalyst for electrooxidation of chlorine-containing electrolyte and a preparation method and application thereof, the catalyst comprises a layered double hydroxide-rare earth basic carbonate heterojunction grown on a nickel substrate in situ, and the nickel substrate is foamed nickel with the surface modified by nickel. On the basis of a strategy for constructing selective adsorption sites capable of distinguishing Cl <-> and OH <->, preferential adsorption of OH <-> is realized by introducing rare earth basic carbonate (RE (OH) CO3), so that the chloride ion corrosion resistance of the material in seawater electrolysis is remarkably enhanced. The heterostructure not only has oxygen evolution reaction activity superior to that of traditional LDH, but also shows excellent structural stability and continuous corrosion resistance under the industrial-grade current density, and a feasible material solution is provided for promoting industrial application of a seawater electrolysis technology.

The invention discloses a uranium adsorption electrostatic spinning membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding a solution B containing hydroxylamine hydrochloride and alkali carbonate into a solution A containing polyacrylonitrile, and stirring to obtain a reaction product; centrifuging a reaction product, and taking supernatant liquid as a spinning solution; the mass ratio of the polyacrylonitrile to the hydroxylamine hydrochloride is 2: (2-3); (2) carrying out electrostatic spinning on the spinning solution to obtain an amidoximation polyacrylonitrile membrane; (3) soaking the amidoximation polyacrylonitrile membrane in an alkali metal hydroxide solution; and soaking the amine oximation polyacrylonitrile membrane subjected to alkali treatment in water to obtain the uranium adsorption electrostatic spinning membrane. According to the preparation method, the utilization rate of raw materials can be increased, and the uranium adsorption performance of the electrostatic spinning membrane is improved.

The present application provides a nickel-iron-manganese cathode material precursor and its preparation method, cathode material and sodium ion battery, which relate to the field of new energy technology. The precursor is a core-shell structure, including a core and a shell coated outside the core, and the core and the shell are both basic carbonates containing nickel, iron and manganese. By regulating the pH value in the co-precipitation method to control the different ratios of hydroxide and carbonate in the core and the shell, precursors with different morphologies of the core and the shell and different ratios of hydroxide and carbonate are obtained. The core is loose and has a small proportion, and its hydroxide content is high. The shrinkage ratio during sintering is relatively small, which avoids the internal hollowness from collapsing and cracking, and improves the cycle performance; the shell is dense and has a large proportion, and its carbonate content is high. The shrinkage ratio during sintering is relatively large. While retaining the energy density, reserving a certain amount of evenly distributed pores can reduce Na + Volume strain during the intercalation and deintercalation process, crack prevention, and balanced capacity performance and cycle performance.

The present invention relates to a method for preparing alkali carbonate / bicarbonate salts, comprising the steps of continuously feeding an aqueous alkali hydroxide solution to a gas-liquid contactor, forcing an inlet CO2-containing gas stream through a sparging device immersed in the gas-liquid contactor below the surface level of the aqueous alkali hydroxide solution to generate bubbles and / or microbubbles, adding hydrogen peroxide near the orifice of the sparging device where the bubbles and / or microbubbles are generated, the hydrogen peroxide supply being adjusted to reduce the formation of alkali carbonates and increase the formation of alkali bicarbonates, and continuously discharging an effluent from the gas-liquid contactor from which the alkali carbonates and bicarbonates, predominantly bicarbonate components, are recovered. A gas-liquid contactor and an apparatus are also provided by the present invention.

Compositions and Processes for Treating Keratinous Substrates: The disclosure relates to compositions and processes for treating keratinous substrates, such as skin and / or hair, where the compositions comprise (a) at least one alkali carbonate, (b) at least one polyol, (c) water and / or at least one non-aqueous solvent, and (d) optionally at least one pH adjuster. The at least one carbonate and the at least one polyol are present in the composition as an associated network. Figure for the abstract: none

The invention relates to a mixed reinforcing agent which is characterized by comprising a mixture of basic carbonate and one or more of zirconium oxide, zircon powder, white corundum and silicon oxide, and the solute particle size of the mixture is 10 nm to 50 [mu] m. The invention further relates to a binder spraying 3D printing method. According to the scheme, the problem that in the prior art, the strength of a binder jet 3D printing ceramic product is low can be solved.

The invention discloses a low-grade regenerated micro-powder-based low-carbon Portland cement-based material which comprises the following components in parts by weight: 50-70 parts of low-carbon cement clinker, 30-50 parts of an active regenerated micro-powder admixture and 0.5-5 parts of a carbon curing accelerator. The carbon curing accelerator comprises a carbonate type layered double-metal hydroxide matrix and a basic carbonate phase growing on the surface of the matrix in situ, and metal elements in the basic carbonate phase and metal elements in the layered double-metal hydroxide are homologous. According to the invention, the low-carbon cement clinker prepared from the low-grade regenerated micro powder is used for replacing the traditional low-carbon cement clinker, so that the carbon emission is reduced while the resource utilization of wastes is realized. Meanwhile, the gelling activity of the regenerated micro-powder is improved by means of chemical and thermal activation and the like, so that the utilization of the regenerated micro-powder in a cement-based material is further promoted.

The preparation method comprises the following steps: S1, preparing a zirconium oxide precursor: mixing carbonate and ammonium nitrate according to a certain proportion, adding a proper amount of water, uniformly stirring, heating to 80 DEG C or above to obtain an oxide precipitate, and then drying, screening and the like the precipitate to obtain the zirconium oxide precursor; obtaining a zirconium oxide precursor; s2, preparing a rare earth element additive: dissolving a rare earth element compound in a small amount of dilute acid, and then dropwise adding into ethanol to obtain the rare earth element additive; s3, preparing a synthetic zirconium material: uniformly mixing the zirconium oxide precursor, alkali carbonate and a rare earth element additive according to a certain proportion, then adding a proper amount of water, mechanically stirring, finally putting the mixture into a high-temperature furnace, and calcining under the protection of atmosphere to obtain the low-zirconium high-whiteness synthetic zirconium material.

The invention discloses a high-purity anhydrous composite rare earth halide and a preparation method thereof, a scintillation crystal, scintillation ceramic and a scintillation thin film material, the general formula of the composite rare earth halide is AxREyXx + 3y, A is an alkali metal element, RE is a rare earth element, X is a halogen element, and y is a rare earth element. The preparation method comprises the following steps: uniformly mixing alkali carbonate or hydroxide, rare earth metal oxide or carbonate or hydroxide and a first part of ammonium halide according to a first preset proportion to obtain a first mixture; carrying out primary heating halogenation reaction on the first mixture in an inert atmosphere to obtain a composite rare earth halide primary material; uniformly mixing the composite rare earth halide primary material with a second part of ammonium halide according to a second preset proportion to obtain a second mixture; and carrying out secondary heating halogenation reaction on the second mixture in an inert atmosphere to obtain the high-purity anhydrous rare earth composite halide. The deep purification of the composite rare earth halide is realized through a two-step halogenation process, and residual trace water and oxygen impurities are thoroughly removed.