535 results about "Carbonate Ion" patented technology

A storage stable aqueous solution or aqueous gel of zinc ions in the presence of bicarbonate ions is disclosed. The solution comprises: (a) a source of zinc ion, (b) a source of a stabilizing anion which can stabilize soluble zinc and bicarbonate and/or carbonate in solution; (c) a source of bicarbonate ion; and (d) a solvent therefor. The solvent comprises a major proportion of water. The zinc salt is present in an amount suitable for the intended purpose; the stabilizing anion in an amount B of at least 1.2 equivalents per equivalent of zinc ion; and the bicarbonate ion cannot exceed certain levels which are related to the level of the stabilizing anion.

The invention discloses a method for preparing sodium hydrosulfide. The production process is as follows: introducing a mixed gas containing sulfureted hydrogen H2S with the content larger than 10 percent and carbon dioxide CO2 with the content not larger than 90 percent into lime cream of about 12 percent of concentration, under the condition of a certain temperature and pressure and under agitation; stopping reaction when CaS is less than or equal to 0.5 percent; separating sediments out to obtain a sulfur calcium hydroxide solution; introducing a mixed gas of sulfureted hydrogen and carbon dioxide into a caustic soda solution with concentration larger than 30 percent under the condition of a certain temperature and pressure and under agitation; stopping reaction when Na2S is less than or equal to 0.5 percent to obtain a sodium hydrosulfide solution containing carbonate ions; and adding slightly not enough sodium hydrosulfide solution under agitation according to the amount of the carbonate ions in the sodium hydrosulfide solution, and separating sediments out to obtain sodium hydrosulfide with low carbonate ions.

A molten carbonate fuel cell stack and a method of operating a molten carbonate fuel cell stack, which fuel cell comprises a porous anode, a carbonate-comprising matrix and a porous cathode, wherein the anode section is supplied with a hydrogenous gas and the cathode section is supplied with a gaseous mixture comprising oxygen and carbon dioxide, the fuel cell is operated at a temperature in a range of about 823-973 K, with the carbonate of the carbonate-comprising matrix being in a fluid state, oxygen and carbon dioxide are reacted at the cathode, yielding carbonate ions which move from the cathode to the anode generating an electric voltage between the anode and the cathode and an electrical current circulating in the external circuit and water that has been formed is led away from the fuel cell together with carbon dioxide, comprising sampling the temperature of inlet of the reactants, sampling the temperature of outlet of reactants, sampling the current density and voltage sampling the flow rate and gas composition of the inlet and outlet gases analyzing the sampled temperature, current density, voltage flow rates and gas composition, and regulating the inlet flow rate such as the pressure drop between inlet and outlet is below 20 mbar and the temperature in each element of a cell of the stack is below 973K.

This invention relates to a method for treating ammonia nitrogen wastewater, especially high-concentration ammonia nitrogen wastewater produced during manufacture of oil-refinery catalyst. The method comprises: (1) adjusting the pH value of the wastewater, and solid-liquid separating to remove suspended matters and dissolved Si2+, Al3+ and their compounds; (2) adding Ca2+ to form CaSO4 precipitate, and solid-liquid separating to reduce acidic matters in the wastewater; (3) adding CO32- to form CaCO3 precipitate, and solid-liquid separating to remove Ca2+ in the wastewater; (4) steam-stripping for deamination, and performing biochemical treatment so that wastewater reaches state discharge standards. The method can solve the problems of low effect on removing suspended matters and dissolved Si2+, Al3+ and their compounds, scaling and column blockage during steam-stripping process, and the need for a large amount of alkali added, and can improve wastewater treatment effect.

The present invention relates to a method of hair colouring and bleaching compositions providing a composition comprising i) at least one source of peroxymonocarbonate ions, ii) at least one alkalizing agent, preferably a source of ammonium ions, and iii) at least one radical scavenger, wherein said composition has a pH of up to 9.5, and applying the composition to the hair and retaining on the hair for a period of less than 20 minutes, which provide a high level of lift and lightening and the required dye deposition and grey coverage whilst reducing the concentration of peroxide, the ammonia odour and reducing the hair fibre damage.

A high-efficiency water softening process is disclosed. The softening-process is particularly effective for the treatment of water process streams containing a broad array of contaminants, such as Ca, Mg, Ba, Sr, iron, aluminum, manganese, copper, zinc, silica, TOC, oil, and grease. The softening-process includes steps of: (a) adding carbonate ions and hydroxide ions to said water process stream until the process stream pH is raised to between at or about 10.5 and at or about 14.0; (b) optionally adding a coagulation aid so as to facilitate the creation of separated solids comprising a substantial portion of the contaminants; (c) optionally adding a polyelectrolyte so as to facilitate the creation of separated solids comprising a substantial portion of the contaminants; and (d) phase-separating the separated solids so as to remove the contaminants and produce a highly purified water process stream.

The present invention relates to hair colouring and hair bleaching compositions comprising a source of carbonate ions, at least one oxidizing agent and a specified polymer thickner wherein said composition is free of a source of radical scavengers. The compositions surprisingly provide improved hair colourant and bleaching compositions which deliver improved lift, lightening and colour delivery whilst minimizing damage which are easy to manufacture and have long shelf life stability.

A method for increasing the concentration of calcium carbonate in a geomaterial that contains indigenous microorganisms capable of hydrolyzing urea to ammonia, which method includes enriching the geomaterial with a source of nutrients, adding urea to the geomaterial which is hydrolyzed to ammonia and which raises the pH of the geomaterial, and adding a source of calcium ions to the geomaterial. Carbonate ions obtained by the hydrolysis of the urea combine with calcium ions to form calcium carbonate.

Succinic acid is produced by allowing a bacterium modified to enhance fumarate reductase activity or cell preparation thereof to react with an organic raw material in a reaction solution containing one of a carbonate ion, a bicarbonate ion, and carbon dioxide gas to generate succinic acid. More preferably, succinic acid is produced by allowing a bacterium modified to enhance activities of fumarate reductase and pyruvate carboxylase and decrease lactate dehydrogenase activity or cell preparation thereof to react with an organic raw material in a reaction solution containing one of a carbonate ion, a bicarbonate ion, and carbon dioxide gas to generate succinic acid. Succinic acid is obtained by collecting the produced succinic acid.

The invention has for its object to provide a preparation method for preparing an anion-exchangeable LDH by decarbonation of a carbonate ion type LDH, which makes sure de carbonation is implemented with safety in a continuous manner while crystal shape, crystal structure and crystallinity are kept intact.

The invention provides a preparation method for preparing an anion-exchangeable, layered double hydroxide wherein a carbonate ion type layered double hydroxide (LDH) having a composition represented by a general formula: Q_xR(OH)_z(CO₃²⁻)_0.5-y/2(X⁻)_y.nH₂O where x is indicative of a numeral range of 1.8≦x≦4.2; z is indicative of 2(x+1); y is indicative of a minimum value of at least 0 that increases to less than 1 when anions (X⁻) remain or a part of anions is introduced; Q is a divalent metal ion; R is a trivalent metal ion; and n is 2±2 is used as a starting material, and y in said general formula increases to a maximum of 1 by substitution of a minus monovalent anion (X⁻¹) at a carbonate ion site thereby implementing substitution, characterized in that the starting material is dispersed in an aqueous solution mixed with a salt containing minus monovalent anions (X⁻) in an amount enough for substitution at the carbonate ion site while said aqueous solution is kept at a pH (hydrogen ion exponent) of greater than 4 to less than 7.

The invention discloses a method for separating methionine from a mixed solution of methionine salt and carbonate by using bipolar membrane electrodialysis. The method is characterized by comprising the steps of arranging a bipolar membrane electrodialysis system, and separating methionine from a mixed solution of methionine salt and carbonate by using a bipolar membrane electrodialysis process, wherein a bipolar membrane is capable of simultaneously generating hydroxyl ions and hydrogen ions through hydrolytic dissociation, the hydrogen ions are capable of neutralizing methionine ions and carbanions in the mixed solution of methionine salt and carbonate to generate methionine, and the generated hydroxyl ions are capable of combining with positive ions to obtain inorganic base. According to the method, a large quantity of acid and alkaline are not required to be additionally introduced in the bipolar membrane electrodialysis process, the environment friendliness is achieved, the process cost is lowered, no inorganic salt waste residue is generated in the process, the recovery efficiency of methionine is high, and the purity is high, thus the generated wastewater is more easily treated.

The invention discloses a method by utilizing double markers to acquire share of inorganic carbon source utilized by plants, which comprises the following steps that: A. sodium bicarbonate produced by different manufacturers is determined, two types of sodium bicarbonate with delta 13C difference being more than eight thousandths are used as an isotopic marker 1 and an isotopic marker 2 to be respectively added into nutrient fluid to culture plants; delta 13C value of bicarbonate ion in nutrient fluid of the isotopic marker 1 is delta C1, and delta 13C value of bicarbonate ion in nutrient fluid of the isotopic marker 2 is delta C2; and B. after more than four leaves appear, the values of delta 13C consisting of stable carbon isotopes of plant leaves to be observed correspondently culturedby the nutrient fluid of the two types of isotopic markers are respectively determined as delta T1 and delta T2; and C. delta C1, delta C2, delta T1 and delta T2 are brought into equation fB= to calculate the share fB of the carbonate ions utilized by the plants. Due to the adoption of the method, the share of the inorganic carbon source utilized by the plants can be rapidly acquired, the steps are fewer, simplicity in calculation can be realized, and data is reliable.

A process for saponifying the organic extractant used for separating RE includes such steps as mixing the extractant with RE carbonate in RE solution or acidic solution, ion exchange reaction between RE ions and H ions of extractant, binding H ions with radical of carbonic acid to generate CO2 and H2O for gradually dissolving RE, extracting RE ions into organic phase, and reusing the residual liquid after supplementing RE solution or acid solution. Its advantages are no environmental pollution and low cost.

A novel method and system of separating carbon dioxide from flue gas is introduced. Instead of relying on large temperature or pressure changes to remove carbon dioxide from a solvent used to absorb it from flue gas, the ion pump method, as disclosed herein, dramatically increases the concentration of dissolved carbonate ion in solution. This increases the overlying vapor pressure of carbon dioxide gas, permitting carbon dioxide to be removed from the downstream side of the ion pump as a pure gas. The ion pumping may be obtained from reverse osmosis, electrodialysis, thermal desalination methods, or an ion pump system having an oscillating flow in synchronization with an induced electric field.

The present invention belongs to the field of pharmaceutical industry and relates to a process for coating a particle comprising a pharmaceutically active ingredient (API) comprising the steps of providing a composition comprising carbonate ions, phosphate ions, or a mixture thereof, providing a particle comprising an API, and precipitating a carbonate salt, a phosphate salt or a mixture thereof onto said particles.

The present invention is also directed to a particle comprising an API, wherein the particle is coated with a coating comprising a carbonate salt, phosphate salt, or mixture thereof, and to a pharmaceutical composition comprising said particles.

Moreover, the present invention is also directed to the use of said particles for preparing a medicament,

The invention discloses a preparation method of aluminum-doped cobalt(II,III) oxide, comprising the steps of (1) mixing aluminum salt solution and a complexing agent to obtain a mixed liquid; (2) adding cobalt salt solution, a precipitating agent solution containing carbonate ions and the mixed liquid of step (1) into a reaction device in concurrent manner, and co-precipitating to obtain aluminum-doped cobalt carbonate; (3) calcining the aluminum-doped cobalt carbonate of step (2) to obtain the aluminum-doped cobalt(II,III) oxide. The three solutions are fed in concurrent manner, so that the problem is solved that the process of preparing aluminum-doped cobalt(II,III) oxide by liquid co-precipitating experiences great differences between precipitating speeds of various elements; the prepared aluminum-doped cobalt(II,III) oxide has uniform distribution of elements, and the doping quantity of aluminum in the aluminum-doped cobalt(II,III) oxide can be significantly increased to 0.3-0.6%.

The invention discloses a method for preparing a peeled layered double hydroxides (LDH)/ carbon nano tube (CNT) composite material in an aqueous solution. The method comprises the following steps of: synthesizing LDH in an aqueous dispersion of CNT by a urea method or an aqueous ammonia method to obtain an unpeeled LDH/CNT complex, displacing interlayer carbonate ions of the LDH in the LDH/CNT complex into negative ions with weak laminar bonding force by treatment of an acid-salt mixed solution, introducing organic ions into the interlayer by ion exchange, and thus obtaining the peeled LDH/CNT complex, wherein the prepared complex shows the single-layer or several-layer peeling property of the LDH and reserves good dispersibility of the CNT. The method is simple, feasible and short in consumed time, does not need a toxic solvent, and is not required to be implemented at a high temperature, and is low in cost.

Disclosed are a conductive membrane able to selectively separate carbon dioxide from a gas mixture containing carbon dioxide, a manufacturing method thereof, and a method of separating carbon dioxide using the membrane. The conductive membrane for carbon dioxide separation includes molten carbonate, acting as a carbonate-ion conductor, and oxide, acting as an electronic conductor, and has infinite selectivity for carbon dioxide at high temperatures of 500° C. or more.

The present invention relates to uniformly coordinating precipitation process of preparing nanometer zinc oxide. The technological scheme includes the reaction between zinc oxide or zinc salt material and ammonia and carbonate as coordinating agent to produce water soluble coordinating compound tetraammonium-zinc carbonate solution; adding sulfide solution to eliminate heavy metal ion inside the coordinating compound solution; adding surfactant, water for dilution or heating decomposing the coordinating compound solution to separate zinc ion and to react with carbonate radical ion to produce fine basic zinc carbonate precipitate; washing the precipitate with ethanol, methanol or acetone, filtering, stoving at 40-80 deg.c and heating at 200-800 deg.c to decompose into nanometer zinc oxide. The production process is simple and has low cost.

The invention discloses a method for preparing a silicon-carbon composite material through molten salt electrolysis. The method comprises the following steps: introducing CO2 gas in a CaCl2-CaSiO3-CaOmolten salt electrolysis process; dissolving CaSiO3 in molten salt to obtain silicate ions, and reducing the silicate ions at the cathode of an electrolytic tank to obtain a nano silicon material; capturing CO2 by utilizing oxygen ions in CaCl2-based molten salt, immobilizing the CO2 into carbonate ions, enabling the carbonate ions to reach a cathode through diffusion in the molten salt, and reducing the carbonate ions into a nano-carbon material on the cathode, thereby obtaining the silicon-carbon composite material on the cathode. The prepared silicon-carbon composite material utilizes thegood structural stability, flexibility and lubricity of the carbon material, so the silicon carbon composite material has the advantages of high specific capacity of silicon storage, high conductivityof a carbon material and the like, thereby solving the problems that the volume of silicon can be changed slightly in the silicon embedding process of lithium ions and the silicon is expanded and pulverized when lithium is embedded into silicon. Moreover, the obtained silicon carbon composite material has the advantages of high specific capacity of silicon storage, high conductivity of the carbonmaterial and the like and achieves the purpose of complementary advantages.

The present invention provides a sustained-release composition by which a sustained-release effect can be obtained for a long time when injecting microparticles of the composition in an amount that can be subcutaneously or intramuscularly injected to a human with ease and without pain. The composition comprises porous hydroxyapatite microparticles having pores embolized by filling the pores in the microparticles with a biologically active drug, a human serum protein, and a mucopolysaccharide, and adding a divalent metal ion. Alternatively, the composition comprises porous hydroxyapatite microparticles having pores embolized in the outer layer by filling the pores in the microparticles with a biologically active drug, a human serum protein, and a water-soluble calcium salt one after another or at one time, and then adding sodium carbonate, sodium hydrogen carbonate, or an aqueous carbonate ion solution.

The present invention relates to hair colouring and hair bleaching compositions comprising a source of carbonate ions, at least one oxidizing agent and a specified gel network thickener system wherein said composition is free of a source of radical scavengers. The compositions surprisingly provide improved hair colourant and bleaching compositions which deliver improved lift, lightening and colour delivery whilst minimizing damage which are easy to manufacture and have long shelf life stability.

The invention discloses a saline-alkali soil improver as well as a preparation method and a use method thereof. The saline-alkali soil improver is prepared by irradiating, modifying and grafting materials such as attapulgite, decomposed coal and sodium polyacrylate. According to the saline-alkali soil improver, carbonate ions in deep soil are cured through ardealite, the pH value of the soil is reduced and the soil can be loosened under the acidic action of the decomposed coal, and the effect of protecting the soil nutrient is achieved by virtue of the attapulgite.

The present invention is carbonic acid type high activity partially crystallized calcium phosphate and its preparation. The material has the nonstoichiometric crystallization state between the crystal and amorphous substance and contains carbonate radical, Mg, Sr and Zn essential for human body bone tissue. It is prepared with water soluble phosphate and calcium salt as material and through adding carbonate, Sr salt and/or Mg salt and/or Zn salt, reaction in water solution, separating, drying and calcining reaction product to obtain carbonic acid type high activity partially crystallized calcium phosphate powder. The powder has high bioactivity, reaction activity and biodegradability, and may be used widely in replacing and repairing hard tissue.

An organic acid is produced by allowing a bacterium which has an ability to produce an organic acid and has been modified so that expression of the sucE1 and mdh genes are enhanced, or a product obtained by processing the bacterium, to act on an organic raw material in a reaction mixture containing carbonate ions, bicarbonate ions, or carbon dioxide gas, and collecting the organic acid.