53 results about "Bicarbonate Ion" patented technology

The invention discloses a bimetallic-based catalyst for promoting CO2 absorption-desorption cycle of an alcohol amine solution as well as a preparation method and application of the bimetallic-based catalyst, an MCM-41 molecular sieve with a high specific surface area and an ordered mesoporous structure is taken as a carrier, Zr (SO4) 2 and copper acetylacetonate are loaded as bimetallic active components, the catalyst has a proper acid site and good surface acidity, and the catalyst can be applied to CO2 absorption-desorption cycle of an alcohol amine solution. The decomposition of bicarbonate ions is accelerated, the fracture bond energy of C-N is reduced, the carbon dioxide desorption performance of MEA and a water-poor system is enhanced, and the energy consumption is reduced. Compared with the prior art, the molecular sieve catalyst is synthesized by adopting a one-step hydrothermal method, and the process is simple; the catalyst is not only suitable for a traditional MEA aqueous solution, but also effective in a novel water-poor amine liquid system, and provides an energy-saving solution for different carbon capture processes. After the catalyst is subjected to five times of absorption-desorption cycles, the catalytic activity of the catalyst can still be kept at 90% or above of an initial value, and good cycle stability is shown.

A carbon sequestration mineral admixture, and a preparation method and device therefor. The method for preparing the carbon sequestration mineral admixture comprises: providing crushed solid waste; providing an activating liquid and a catalytic liquid, one or both of which is optionally in the form of micro-droplets; and contacting and reacting the activating liquid, the catalytic liquid, flue gas containing carbon dioxide, and the crushed solid waste to obtain a carbon sequestration mineral admixture, the contacting optionally being carried out under the action of an external mechanical force, wherein the activating liquid comprises one or more of a magnesium salt, an ammonium salt, an organic amine and a lower alkanol serving as an activating agent, and the catalytic liquid comprises carbonate ions and / or bicarbonate ions serving as a catalyst. The accelerated carbonization method has the advantages of a high carbonization efficiency, simple operation, and also being capable of achieving a high degree of carbonization and significantly increasing the added value of a carbonization product.

The invention discloses a method for in-situ leaching mining of sandstone uranium ore, the concentration of bicarbonate radical ions in ore bed water in the sandstone uranium ore is lower than 0.5 g / L, the sandstone uranium ore comprises yttrium-containing uranium ore, and the carbonate content is 1.5%-2.5%; the ore bed water serves as a solvent, 500 mL of leaching agents with different pH values adjusted through sulfuric acid are prepared, and the concentration of hydrogen peroxide in the leaching agents is 2 g / L; and determining the maximum pH value when the uranium ore in the slice sample is corroded by using the leaching agents with different pH values, and taking the maximum pH value as a critical pH value. The leaching agent with the critical pH value is used for exploiting the sandstone uranium ore, corrosion to gangue minerals in the leaching process can be reduced, the number of formed colloids and CaSO4 precipitates is reduced, the precipitates are prevented from blocking an ore bed, in addition, the method can be used for target corrosion of the refractory uranium ore, and therefore efficient leaching is achieved.

The invention belongs to the technical field of deep-time atmosphere carbon dioxide isotope composition estimation, and particularly relates to a high-resolution deep-time atmosphere carbon dioxide isotope composition estimation method and system, and the method comprises the steps: S100, reconstructing the global surface average temperature based on the atmosphere carbon dioxide concentration pCO2; s200, calculating the relative content of carbonate ions and bicarbonate radical ions in the marine carbonate system; s300, determining a fractionation coefficient; s400, determining a difference value V of carbon isotopes of the carbonatite and surrounding seawater in the carbonatite deposition process on the basis of the carbon isotope difference of the carpopods and the carbonatite; according to the method, carbonate rocks which generally exist in geological history and are continuously deposited on time are selected as a tool for atmospheric carbon dioxide isotope reconstruction, and the atmospheric carbon dioxide isotope is reconstructed through quantitative evaluation of the geological history ocean surface layer temperature, the ocean carbonate rock salt content and the fractionation effect during formation of the carbonate rocks. And the atmospheric carbon dioxide isotope composition in the deep-time geological historical evolution process can be accurately calculated.

The objective is to provide a method for dissolving solids that is excellent at dissolving solids generated in nuclear facilities. [Solution] A method for dissolving a solid generated at a nuclear facility, comprising dissolving the solid in a solution containing at least one of carbonate ions and bicarbonate ions, and at least one of potassium ions and cesium ions.

Provided is a carbonate-containing granular material production method with which it is possible to produce a carbonate-containing granular material at a cost lower than when using conventional methods.　The present invention has a carbonation step for bringing, into contact with a carbonation-target granular material at a maximum temperature of higher than 0°C to lower than 100°C, either water, a carbonation accelerator, and at least one among a carbon dioxide-containing substance, a carbonate ion-containing water, and a hydrogen carbonate ion-containing water, or a carbonation accelerator and at least one among a carbon dioxide-containing water, a carbonate ion-containing water, and a hydrogen carbonate ion-containing water. The total amount of water brought into contact in the carbonation step is 1 mass% or more of the carbonation-target granular material. The carbonation accelerator contains bacteria. The bacteria are at least one selected from the genus Bacillus, the family Bacillaceae, the class Bacilli, the family Clostridiaceae, the family Micrococcaceae, the family Microbacteriaceae, or the family Comamonadaceae.

The invention discloses a method for activating manganese dioxide by using oxygen-containing anions, which comprises the following steps: placing delta-MnO2 in simulated distribution water, adding NH4 < + > to enable the concentration of the delta-MnO2 to be 2 mg / L, oscillating and incubating in a shaking table for more than 20 days, and changing the water once every 1-2 days to obtain manganese oxide with NH4 < + > oxidation capacity, the simulated distribution water contains oxygen anions with the following concentrations: 2 mM of HCO3 <->; and 0.002 mM of HPO4 < 2->. According to the method disclosed by the invention, the structure of delta-MnO2 is optimized by controlling the ratio of bicarbonate ions to hydrogen phosphate ions in water, so that the oxidation capacity of delta-MnO2 is remarkably improved, and NH4 < + > in water can be removed within a few hours instead of the original capacity without catalytic oxidation of NH4 < + >. The invention provides a feasible and economical solution for large-scale preparation of MnO2-based filter materials and water deamination engineering, and has a wide engineering application prospect.

Provided is a method for producing a carbonate-including substance, wherein a carbonate-including substance can be produced with higher carbonation efficiency than before.　This method for producing a carbonate-including substance has: a hydration step in which water or ice is brought into contact with a substance for carbonation that has a maximum temperature of 100°C to 600°C, and a hydration process is performed; and a carbonation step in which either water and a carbon dioxide-including substance, or at least one of carbon dioxide-including water, carbonate ion-including water, and hydrogencarbonate ion-including water is or are brought into contact with the substance for carbonation that has been subjected to the hydration process and has a maximum temperature of greater than 0°C and less than 100°C, wherein the total water quantity of the water or ice that is brought into contact with the substance for carbonation in the hydration step is greater than or equal to 1 vol% of the substance for carbonation.

A water and carbon dioxide co-electrolysis system (1) comprises an anion exchange membrane (AEM) cell (2) having at least one AEM cell (2c) comprising a cathode (8), an anode (12), and an AEM membrane (16) separating the cathode from the anode, and an anolyte circuit (18) in which the AEM membrane (16) is separated from the anode, an anolyte is fluidly connected to the anode (12) via an anolyte inlet (14i) and an anolyte outlet (14o) of the anode (12). The CO2 and H2O co-electrolysis system further comprises a mineralization system (3) comprising a mineralization unit (27) connected to the anolyte circuit (18) and comprising a mineralized metal configured to react with carbonate and bicarbonate ions circulating in the anolyte circuit (18) to form a metal carbonate.

The application discloses dialysis concentrate preparation equipment, one-way centralized liquid supply system and a working method thereof, to solve the problems of complex structure, large floor area and low working efficiency of the existing liquid preparation equipment. The application comprises a box body and a main machine, the box body is internally provided with a water tank, a powder bin, a mixer, a liquid supply balancer and a mixer stirring pump, reverse osmosis water and dialysis powder are injected into the mixer, and stirring is performed through the mixer stirring pump; the main machine is used for controlling the working of the water tank, the mixer and the liquid supply balancer; the application has the advantages of simple structure, convenient use, full intelligent preparation of dialysis concentrate, improved working efficiency, reduced artificial burden, exquisite and compact complete equipment, saved floor space, small floor area, liquid preparation mode of immediate use, inhibited bicarbonate ion volatilization, improved dialysis liquid purity, separated supply of concentrate to dialysis machines in negative area and positive area, realized one-way branch liquid supply, and avoided hospital infection risk.

The invention relates to a molecular resist composition and a pattern forming method. The present invention addresses the problem of providing: a molecular resist composition having excellent sensitivity, resolution, and LWR in optical lithography using high-energy rays; and a pattern forming method using the molecular resist composition. The present invention is a molecular resist composition characterized by containing a sulfonium salt represented by the following formula (1) or (2), a salt containing a cation represented by the following formula (1-1) and a halide ion, a nitrate ion, a hydrogen sulfate ion, a bicarbonate ion, a tetraphenylborate ion or an anion represented by any one of the following formulae (1-2)-(1-8), and an organic solvent, and no base polymer is contained.

A reactor for enhanced and scalable CO2 sequestration and storage in water with neutral or near neutral pH outflow is described, along with a method of use thereof. The reactor and method are an AWL reactor and method that additionally employ an acid to enhance CO2 hydration kinetics, and, as such, the conversion of CO2 to bicarbonate ions for storage. In addition, the reactor and method employ a base, in an amount equimolar to the acid's amount, to directly capture any un-titrated aqueous CO2, and, as such, to convert even more CO2 to bicarbonate ions for robust storage, and also to neutralize the otherwise over-acidified effluent water stream being returned to the environment from the reactor.

The invention relates to the technical field of carbon dioxide electroreduction, in particular to an electrolyte and method for preparing methane by inhibiting hydrogen evolution reaction in the CO2 electroreduction process, the electrolyte is an aqueous solution of inorganic salt, cations of the inorganic salt comprise alkali metal cations, and anions of the inorganic salt comprise Cl <-> and HCO3 <->. According to the method, methane is selectively prepared by using the composite electrolyte containing chloride ions and bicarbonate ions in an environment with a neutral pH value, and a hydrogen evolution reaction in electrochemical reduction of carbon dioxide is effectively inhibited. According to the method, the composite electrolyte containing chloride ions and bicarbonate ions is used, the catalyst is optimized, the pH value of the electrolyte and the reaction potential selectivity are regulated and controlled, so that the Faraday efficiency of methane is improved, and the Faraday efficiency of methane and ethylene in the product is regulated and controlled by changing the molar ratio of the chloride ions to the bicarbonate ions.

The invention relates to a seawater-based ionic composition for the manufacture of medical devices intended for administering said composition to patients, and to restorative and soothing cosmetics, comprising a specific concentration of chloride (Cl), sodium (Na), sulfate (SO4), sulfur (S), magnesium (Mg), calcium (Ca), potassium (K), and bicarbonate (HCO3). This composition is reproducible, stable, well-tolerated, and can be used alone or in combination with other ingredients.

This invention relates to the field of chemical pharmaceutical manufacturing technology, and discloses a process for preparing compound sodium bicarbonate to improve acid-base balance. The process includes: preparing an alkaline sodium bicarbonate raw material solution and an acidic raw material solution containing calcium and magnesium salts; dispersing the alkaline raw material solution into droplet clusters using a coaxial gas-liquid atomizing nozzle and a carbon dioxide gas source; allowing the droplet clusters to absorb carbon dioxide and pre-regulate their own hydrogen ion concentration during vertical vector descent; introducing the droplet clusters into the acidic raw material solution to form a homogeneous system and dispensing them; sterilizing the pharmaceutical packaging containers using a terminal overpressure compensation method; and injecting carbon dioxide into the sterilization chamber during the heating stage to establish an external pressure barrier. This invention solves the contradiction of high-concentration calcium and magnesium ions and bicarbonate ions precipitation in a single homogeneous system by blocking the precipitation formation pathway through microscale acidification modification, achieving long-term physical stability and coexistence of the formulation.

The application discloses a pyridine amine based bifunctional polyionic liquid catalyst and a preparation method and application thereof. The pyridine amine based bifunctional polyionic liquid catalyst is prepared by using 1-(3-propylamine hydrobromide)-3-vinylimidazole ionic liquid [PAVIm]Br·HBr and 1-pyridyl-2-vinylimidazole ionic liquid [PDVIM]Br as comonomers, adding a crosslinking agent and an initiator, and copolymerizing to synthesize a polyionic liquid catalyst I. The pyridine amine based bifunctional polyionic liquid catalyst has a developed pore structure and rich ion groups (carbonate ions and bicarbonate ions), exhibits high CO2 adsorption performance, can catalyze one-pot synthesis of a chain carbonate from CO2, an epoxide compound and methanol under a solvent-free and cocatalyst-free condition, and realizes efficient utilization of CO2.

The present application relates to a kind of water treatment system and water hardness continuous removal device, raw water is entered into raw water chamber through raw water import, is filtered after being filtered by conductive filter screen, and the water production is entered into water production chamber, and the water production obtained is discharged outward through water production outlet;Conductive filter screen is electrolyzed in the process of electrification, and hydroxyl ion is generated on its surface, reacts with bicarbonate ion in raw water chamber to obtain carbonate ion, and carbonate ion combines with calcium magnesium ion to obtain carbonate precipitate on conductive filter screen, that is, the scaling component is removed from water in advance by ionization technology, without using any chemical agent.In addition, when scaling is formed, periodically control the work of scraping assembly, and the scaling attached to conductive filter screen is scraped off from conductive filter screen, to prevent scaling accumulation from affecting device operation, ensure normal water production, without adding or using any chemical agent, and without using a large amount of raw water in backwashing process, water hardness can be continuously removed, and the operating cost is relatively low.

The disclosure relates to a process for producing magnesium hydrogen carbonate and / or calcium hydrogen carbonate. An anion exchanger loaded with bicarbonate ions is provided, and a solution containing magnesium salt and / or calcium salt is then passed through the anion exchanger.

This invention relates to a fire-resistant, heat-insulating, and thermally insulating composite material, its preparation method, and its application. The composite material comprises an outer layer and an inner layer stacked together, connected by weaving and / or quilting. The outer layer includes a first woven layer made of a first continuous refractory fiber, with a bimetallic hydroxide epitaxially grown in situ on the surface of the first continuous refractory fiber. The inner layer includes a second woven layer made of a second continuous refractory fiber, with flexible aerogel disposed on the surface and / or in the cavities of the second woven layer. The interlayer anions of the bimetallic hydroxide include carbonate and / or bicarbonate ions. This invention utilizes continuous refractory fibers, which are beneficial for flame retardancy, fire prevention, and heat insulation. The bimetallic hydroxide in the outer layer can release interlayer water and hydroxyl water at high temperatures, and the interlayer anions can decompose into carbon dioxide, actively cooling and extinguishing open flames. The flexible aerogel in the inner layer is beneficial for heat insulation. The connection method avoids the use of polymer adhesives, resulting in good air permeability.

The invention discloses a method for recycling lithium from a waste lithium iron phosphate battery, and belongs to the technical field of waste battery material resource recycling. The method comprises the following steps: carrying out oxidizing roasting on the waste lithium iron phosphate positive electrode material and an iron-based sulfide in an oxygen-containing atmosphere to obtain a roasted material; leaching the roasted material to extract lithium, and carrying out solid-liquid separation to obtain a separated liquid and lithium extraction slag; the separation liquid is subjected to precipitation iron removal and solid-liquid separation, and lithium-rich liquid containing bicarbonate radical ions and ferric hydroxide precipitation are obtained; and reacting the lithium-rich liquid with an alkaline substance under a heating condition to obtain lithium carbonate. The method has the advantages of high selectivity, less impurity introduction, simple process flow and the like, can realize efficient recovery and resource utilization of lithium, and promotes the lithium battery recovery industry to develop towards a clean, efficient and sustainable direction.

There is an innovative cockroach killer consisting of two active chemical substances (one in salt form composed of sodium ions and bicarbonate ions, and the other in powdered sugar form). Their chemical formulas are NaHCO3 ( fig.2) and C12H22O11 ( fig.1), respectively and are available in powder form or in specific plastic trapping containers. The product in question is placed in indoor and outdoor areas. The sweet taste of the first chemical substance C12H22O11 attracts the cockroach to taste it; taking a small dose, the above substance passes through the salivary glands and liquefies; after liquefaction, the second chemical substance NaHCO3 starts to act and expand internally in the cockroach's gastrointestinal system, causing swelling and immediate extermination of said insect.

A reactor for enhanced and scalable CO2 sequestration and storage in water with neutral or near neutral pH outflow is described, along with a method of use thereof. The reactor and method are an AWL reactor and method that additionally employ an acid to enhance CO2 hydration kinetics, and, as such, the conversion of CO2 to bicarbonate ions for storage. In addition, the reactor and method employ a base, in an amount equimolar to the acid's amount, to directly capture any un-titrated aqueous CO2, and, as such, to convert even more CO2 to bicarbonate ions for robust storage, and also to neutralize the otherwise over-acidified effluent water stream being returned to the environment from the reactor.

The invention discloses a method for in-situ leaching mining of sandstone uranium ore, the concentration of bicarbonate radical ions in ore bed water of the sandstone uranium ore is lower than 0.5 g / L, uranium in the sandstone uranium ore mainly exists in a uranium stone form, and the carbonate content is higher than 2%. The critical pH value of uranium stone corrosion is determined based on laboratory conditions, the required injection pressure of carbon dioxide is determined based on the critical pH value, the proper required injection pressure of oxygen is determined, and then the corresponding flows of carbon dioxide and oxygen during on-site leaching are determined according to the liquid injection flow of a liquid injection well. In this way, by controlling the pressure and flow of carbon dioxide and the pressure and flow of oxygen, the pH value of ore bed water is controlled, advantageous dissolution and leaching are achieved, the leaching time is shortened, the leaching efficiency is improved, and the uranium concentration of leachate is improved.

This invention discloses a method for lithium recovery from calcium-magnesium slag during lithium extraction. By introducing CO2 gas during the slurry washing process of the calcium-magnesium slag, the precipitated lithium carbonate in the slag can be dissolved, thereby further improving the lithium recovery efficiency. In this invention, the calcium-magnesium slag is washed using a multi-stage countercurrent slurry preparation method, which has the advantages of low water consumption, high lithium concentration in the washing liquid, and high washing efficiency. The washing liquid is returned to the calcium-magnesium removal process, resulting in minimal dilution of the original lithium concentration and reducing the viscosity of the slurry and the formation of lithium carbonate precipitation, which is beneficial for industrial production. The washing liquid obtained from the multi-stage countercurrent slurry preparation process contains a large amount of bicarbonate ions. When the lithium concentration is high enough and the impurity content is permissible, it can be mixed with the purified liquid and introduced into the lithium precipitation process, which can further reduce the amount of sodium carbonate used, thereby reducing operating costs. In addition, the lithium recovery process in the washing liquid can be shortened, eliminating the need for additional adsorption or extraction stages, and has the advantages of a short, simple, and efficient process flow.

Provided is a method which is for producing a carbonate-containing granular material and by which a carbonate-containing granular material can be produced at a lower cost and more quickly than before.　This method for producing a carbonate-containing granular material comprises a carbonation step for bringing a granular material to be carbonated having a maximum temperature of higher than 0ºC and lower than 100ºC into contact with water, a carbonation accelerator, and at least one among a carbon dioxide-containing substance, carbonate ion-containing water, and hydrogen carbonate ion-containing water, or with a carbonation accelerator and at least one among carbon dioxide-containing water, carbonate ion-containing water, and hydrogen carbonate ion-containing water, wherein: the total amount of the water brought into contact in the carbonation step is at least 1 mass% of the amount of the granular material to be carbonated; the carbonation accelerator contains a sulfur compound or a sulfur compound and a chlorine compound; and the content of sulfur or the total content of sulfur and chlorine in the carbonation accelerator is at least 0.5 mass% of the amount of the granular material to be carbonated.

To provide a method for producing artificial seawater, capable of reducing labor of a breeder or a staff of an aquarium facility or the like, and capable of being prepared in a short time.SOLUTION: A method for producing artificial seawater according to an embodiment of the present invention includes a step of preparing near-saturated salt water, a step of diluting the near-saturated salt water, and a step of dissolving trace components other than NaCl in the near-saturated salt water, wherein the trace components include at least magnesium ions, calcium ions, potassium ions, sodium ions, chloride ions, bicarbonate ions, and sulfate ions.SELECTED DRAWING: Figure 1

The invention relates to an electrolytic mineral composition in powder form for solution to be diluted for topical applications for use as a medicinal product and medical device, comprising a specific concentration of chloride (Cl), sodium (Na), sulfate (SO4), sulfur (S), magnesium (Mg), calcium (Ca), potassium (K), and bicarbonate (HCO3). This composition, combining pharmaceutical-grade salts, is dosable, reproducible, stable, well-tolerated, and can be used alone or in combination with other ingredients to inhibit inflammatory factors and / or promote wound healing and / or promote ciliary beat, particularly in the treatment and prevention of diseases associated with inflammatory disorders, and / or for wound healing purposes, and / or for mucociliary dysfunction.

The present application belongs to the technical field of carbon fixation coating, and particularly relates to a titanium-based biomass coating, a preparation method and application thereof. The titanium-based biomass coating provided by the present application is coated on the surface of cement-based material in the plastic stage, and the nucleation effect of nano-titanium dioxide can accelerate the hydration of the surface layer of the cement-based material, refine the size of calcium hydroxide, and provide more reactants for the carbonation reaction. The present application loads carbonic anhydrase on the surface of nano-titanium dioxide, which inhibits the problem of nano-titanium dioxide agglomeration, and the nano-titanium dioxide has good stability and biocompatibility, so that the fixed carbonic anhydrase has good activity and stability. The carbonic anhydrase can accelerate the absorption of carbon dioxide, form high-concentration bicarbonate ions in the pore solution on the surface of the cement-based material, promote the carbonation reaction process, rapidly form calcium carbonate on the surface layer of the cement-based material, and form a dense surface layer structure, so that early rapid carbon fixation is realized in a low-concentration carbon dioxide environment, and the occurrence of sustained carbonation is inhibited.

The present application belongs to the technical field of seawater pretreatment and resource recovery, and relates to a seawater softening pretreatment method based on cation membrane electrolysis. Seawater is first acidified in the anode region of a nylon net electrolytic cell to remove bicarbonate ions, and then deacidified in the cathode region of the nylon net electrolytic cell. Then, the seawater enters an ion membrane electrolytic cell, seawater is introduced into the cathode region, and a sodium sulfate solution containing calcium carbonate is introduced into the anode region. After electrochemical reaction, magnesium ions in the seawater are precipitated. Then, the seawater enters a centrifugal separation device, the precipitated magnesium hydroxide is collected and dried to serve as a product with certain industrial value. Then, sodium carbonate or carbon dioxide is added to the seawater to precipitate calcium ions. The solution after the reaction enters a filtration separation unit, the precipitated calcium carbonate is intercepted and recovered to serve as a neutralizing agent for the anode region of the electrolytic cell. The effluent after the reaction can be used for seawater desalination, chlor-alkali industry or hydrogen production industry.

The invention provides a liquid-phase absorbent for direct air capture and application thereof, and relates to the technical field of direct air capture, carboxymethyl chitosan is used for direct air capture for the first time, the liquid-phase absorbent for direct air capture comprises carboxymethyl chitosan and alkali liquor, and when the liquid-phase absorbent makes contact with air, the liquid-phase absorbent can be used for direct air capture. Carbon dioxide in air not only reacts with hydroxyl ions in the liquid phase absorbent, but also chemically interacts with abundant carboxylate ions on molecular chains of carboxymethyl chitosan, and is efficiently converted into carbonate ions and bicarbonate ions through the synergistic mechanism, so that the carbon dioxide is fixed in a liquid phase. Experiments show that the liquid-phase absorbent not only has better absorption performance on carbon dioxide, but also can be regenerated at a lower temperature (60-95 DEG C). In addition, the main component of the liquid-phase absorbent is carboxymethyl chitosan, and the liquid-phase absorbent has the advantages of low use cost, no toxicity, biodegradability, environmental friendliness and the like.