15 results about "Silver carbonate" patented technology

The application discloses submicron silver powder and a preparation method and application thereof, and belongs to the technical field of metal conductive powder.The preparation raw material of the submicron silver powder comprises an oxidizing agent, a reducing agent, a dispersing agent, a coating and settling agent and a twin crystal inhibitor; the oxidizing agent comprises at least one of silver nitrate, silver nitrite, silver carbonate and silver oxalate; the reducing agent comprises at least one of ascorbic acid, glucose, sodium borohydride, hydrazine hydrate and formaldehyde; the coating and settling agent comprises at least one of lauric acid, myristic acid, palmitic acid and stearic acid; and the twin crystal inhibitor comprises at least one of N,N-dimethylformamide, dimethyl sulfoxide, acetonitrile, hexamethylphosphorus triamide and dimethylacetamide; while effectively improving the dispersibility of the submicron silver powder, the twin crystal inhibitor restrains the growth of the eutectic face of the silver powder crystal, reduces the amount of the organic dispersing agent and improves the use performance of the silver powder at the slurry end.

The application provides a deuterated fluorene-based blue light polymer material and a preparation method of a planar conformation film. In order to solve the problems of insufficient stability of a PODPF material, the deuterated raw material is synthesized by using silver carbonate as a catalyst and heavy water as a deuterium source to directly perform H / D exchange on 2,7-dibromo-9-fluorenone deoxy, so that the problem of multiple deuterated synthesis steps is solved, and a novel main chain fully deuterated poly-4-alkoxy-9,9-diphenylfluorene polymer light-emitting material (d 15 -PODPF) is prepared, the material can be used for preparing the planar conformation film, the problems of high planar conformation content and strong inter-chain aggregation caused by annealing of the PODPF are solved, and the problems of reduced blue light color purity and fluorescence quantum efficiency are solved. The application further provides the deuterated fluorene-based blue light polymer material, the planar conformation film and application of the planar conformation film in an organic thin film optoelectronic device.

The invention relates to micro-nano silver coated copper conductive powder and a preparation method and application thereof.The preparation method comprises the steps that carbon dioxide serves as an acid-base regulator to dynamically regulate and control the precipitation and separation process of a copper precursor to obtain a basic copper carbonate carrier material, and basic copper carbonate loaded silver carbonate precipitate is obtained through cation exchange of a silver source; and carrying out chemical reduction, solid-liquid separation, washing and drying to obtain the micro-nano silver coated copper conductive powder. Compared with the prior art, the method is based on the acidity and precipitation effects of CO2, operation is easy, green and environment-friendly, and the prepared micro-nano silver-coated copper conductive powder is narrow in particle size distribution, high in conductivity, low in silver content and good in stability.

The invention discloses a total arsenic online monitoring reagent formula and a preparation method, the total arsenic online monitoring reagent formula comprises a reagent A, a reagent B, a reagent C, a reagent D and a total arsenic standard solution, the reagent A is composed of sulfuric acid, potassium persulfate and pure water, the reagent B is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water, the reagent C is composed of sulfuric acid, tartaric acid and pure water, and the reagent D is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water. The reagent D is composed of potassium hydroxide, potassium borohydride and pure water, and the total arsenic standard solution is mother liquor with the concentration of 1000 mg / L. Through the synergistic effect of silver carbonate in the reagent B and the emulsifier OP-10, interference substances such as sulfides and heavy metal ions can be effectively shielded, the relative standard deviation of a monitoring result is smaller than or equal to 5%, and the accuracy of monitoring data is improved.

The invention provides a novel carrier-free catalysis strategy, the in-situ carboxylation cyclization reaction of ultralow-concentration carbon dioxide and propargylamine is realized by utilizing low-cost silver carbonate under the conditions of normal temperature and normal pressure, and the oxazolidinone compound with important industrial value is efficiently synthesized. The catalytic system not only can efficiently convert carbon dioxide in a low concentration range of 5 vol.% to 35 vol.%, but also can directly convert carbon dioxide as low as 0.04 vol.% in air to generate oxazolidinone, the highest yield can reach 97%, and good substrate applicability is shown. By constructing a circular reaction device, the concentration of carbon dioxide in simulated gas can be reduced from 15 vol.% to 3 vol.%, and meanwhile, the average yield of oxazolidinone is maintained to reach 92%.

The invention belongs to the technical field of antibacterial agents, and particularly relates to a citrate composition of silver and a preparation method and application thereof. The preparation method of the silver citrate composition provided by the invention comprises the following steps: mixing silver carbonate and a citric acid aqueous solution, and carrying out double decomposition reaction to obtain the silver citrate composition, the pH value of the citric acid aqueous solution is 1-5, and the molar ratio of citric acid in the silver citrate aqueous solution to silver element in silver carbonate is greater than or equal to 1: 2. By limiting the pH value of the citric acid aqueous solution and the dosage ratio of the citric acid to the silver carbonate, the citric acid aqueous solution and the silver carbonate are directly mixed under the conditions of normal temperature and normal pressure, so that the citrate composition of silver can be efficiently prepared, the preparation process is simple and easy to operate, and industrial production can be conveniently realized.

The invention discloses a method for preparing a pyrrolopyridine derivative by utilizing a reaction of conjugated diene functionalized isonitrile and methylene isonitrile, and belongs to the technical field of organic synthesis. The method comprises the following steps: by taking conjugated diene functionalized isonitrile and methylene isonitrile as reaction substrates and silver carbonate as a catalyst, reacting in an organic solvent to obtain the 1H-pyrrolo [2, 3-c] pyridine derivative, the structural formula of the 1H-pyrrolo [2, 3-c] pyridine derivative is shown in the specification. The 1H-pyrrolo [2, 3-c] pyridine derivative can be prepared by reacting two types of isocyanide compounds at normal temperature and normal pressure without isolating water or oxygen; the method has the advantages of mild reaction conditions, simple operation, simple and easily available raw materials and reagents and strong practicability, and is suitable for synthesizing various 1H-pyrrolo [2, 3-c] pyridine derivatives.

The application discloses a method for preparing pyrrolopyridine derivatives by reacting conjugated diene functionalized isonitrile and methine isonitrile, and belongs to the technical field of organic synthesis. The conjugated diene functionalized isonitrile and the methine isonitrile are used as reaction substrates, silver carbonate is used as a catalyst, and the reaction is carried out in an organic solvent to obtain 1H-pyrrolo[2,3-c]pyridine derivatives; the structural formula of the 1H-pyrrolo[2,3-c]pyridine derivatives is shown in the description. The application uses two types of isonitrile compounds, and the 1H-pyrrolo[2,3-c]pyridine derivatives can be prepared at normal temperature and pressure without isolating water or oxygen. The reaction condition is mild, the operation is simple, the raw materials and reagents are simple and easy to obtain, the practicability is high, and the method is suitable for synthesizing various 1H-pyrrolo[2,3-c]pyridine derivatives.

The application discloses a synthesis method of an axially chiral biaryl quinoline nitrogen oxygen compound and belongs to the field of organic chemistry. With racemic 1-aryl isoquinoline nitrogen oxide 1 and acrylic ester 2 as raw materials, palladium trifluoroacetate / N-acetyl-L-alanine as a catalyst, silver carbonate as an oxidant, 1,4-p-benzoquinone and trifluoroethanol as additives, asymmetric alkenylization reaction occurs in 1,2-dichloroethane / acetonitrile mixed solvents, and two types of axially chiral biaryl quinoline nitrogen oxygen compounds are obtained. The kinetic resolution method has the advantages of good resolution effect (up to 102.7), high yield and high enantioselectivity (up to 99%), and the like, and the remaining raw material can be derived through two steps to obtain a commercial (R)-QUINAP ligand.

The present application relates to the field of medicine synthesis, and discloses a synthetic method of a sanguinarine intermediate compound bromide and application thereof. First, compared with the prior art, the synthetic method of the sanguinarine intermediate compound bromide can avoid using a difficult-to-prepare starting material, has short steps, mild reaction conditions, is easy to operate, has low cost, is environmentally friendly, has high yield and high product purity. Secondly, compared with the prior art, the sanguinarine hemisulfate synthesized by using the above bromide as a raw material can greatly reduce the amount of noble metal palladium catalyst, avoid using silver carbonate as an alkali (acid binding agent), and through conventional post-treatment operations such as extraction, beating and concentration, high-purity sanguinarine hemisulfate can be obtained without column chromatography separation.

The invention discloses a method for constructing ortho-tetra-substituted N-hetero-linked aromatic hydrocarbon N-oxide, which comprises the following steps: by taking isoquinoline N-oxide as shown in a formula (I) and iodo-aromatic hydrocarbon as shown in a formula (II) or a formula (III) as raw materials, adding palladium acetate, silver carbonate, a ligand, alkali and a solvent, and replacing air with nitrogen flow or directly operating and reacting in a glove box to obtain the ortho-tetra-substituted N-hetero-linked aromatic hydrocarbon N-oxide. The ortho-tetra-substituted N-hetero-linked aromatic hydrocarbon N-oxide as shown in a formula (IV) or a formula (V) is prepared through post-treatment of a reaction solution, and the reaction equation is as follows: in the formula, X is C or N, and substituent groups R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14 and R15 are independently selected from H, methyl, phenyl, chlorine, fluorine, nitro, methyl ester group, cyano, phenoxy phenyl, methoxyl, ethyoxyl, propoxy, benzyloxy or phenylacetylene respectively. The method is wide in substrate adaptability, mild in reaction condition, simple to operate and good in arylation selectivity.

The utility model belongs to the technical field of silver carbonate preparation, and particularly relates to a counter-rotating device and a silver carbonate synthesizing device.The counter-rotating device comprises a motor and a main shaft driven by the motor, and two pieces of mixing slurry are arranged on the main shaft in a penetrating mode; the two mixing paddles are arranged in a left-rotor wing shape and a right-rotor wing shape; when the motor drives the main shaft to rotate in the forward direction, the two mixing paddles rotate in opposite directions so as to generate opposite rotational flows; when the motor drives the main shaft to reversely rotate, the two mixing paddles reversely rotate to generate reverse coaxial rotational flow; the convection mechanism is arranged, the at least two mixing paddles are arranged on the main shaft, and the two mixing paddles move in opposite directions, so that a sodium carbonate solution and a silver nitrate solution can fully react and are uniformly mixed in a convection manner, and more unreacted silver nitrate or sodium carbonate is prevented from being remained in the reacted solution; and subsequent separation and purification are difficult.

The invention discloses a silver sulfate purification method and circulation system, and the purification method comprises the following steps: S1, adding silver carbonate into industrial silver sulfate slurry, carrying out gradient temperature control and stirring reaction until the pH value of the system is neutral, and obtaining deacidified slurry; s2, carrying out solid-liquid separation on the deacidified slurry to obtain a purified silver sulfate solid and a silver-containing mother solution; s2, the silver-containing mother liquor is subjected to electrolysis-carbonation treatment, regenerated silver carbonate is obtained, and the regenerated silver carbonate is reused in the step S1; according to the method, acid impurities are converted into silver sulfate in a targeted mode through silver carbonate, a silver resource closed-loop cycle is formed by coupling a mother liquor electrolysis-carbonation regeneration technology, silver carbonate is used as an acid removing agent, sulfuric acid is accurately removed and converted into silver sulfate in situ, a by-product CO2 is decomposed to drive reaction kinetics, and silver sulfate is obtained. Acid impurities in industrial silver sulfate are efficiently removed, closed-loop recovery of silver resources is achieved, and the production cost and environmental pollution are reduced.

The invention discloses submicron silver powder and a preparation method and application thereof, and belongs to the technical field of metal conductive powder. The preparation raw materials of the submicron silver powder comprise an oxidizing agent, a reducing agent, a dispersing agent, a coating settling agent and a twin crystal inhibitor. The oxidizing agent comprises at least one of silver nitrate, silver nitrite, silver carbonate and silver oxalate; the reducing agent comprises at least one of ascorbic acid, glucose, sodium borohydride, hydrazine hydrate and formaldehyde; the coating settling agent comprises at least one of lauric acid, myristic acid, palmitic acid and stearic acid; the twin crystal inhibitor comprises at least one of N, N-dimethylformamide, dimethyl sulfoxide, acetonitrile, hexamethylphosphoric triamide and dimethylacetamide, the dispersity of the submicron silver powder is effectively improved, meanwhile, co-crystal face growth of silver powder crystals is inhibited, the use amount of the organic dispersing agent is reduced, and the use performance of the silver powder at the paste end is improved.

A cold storage material of the present disclosure includes: tetrahydrofuran; water; and at least one silver compound selected from the group consisting of silver phosphate represented by a chemical formula Ag3PO4, silver carbonate represented by a chemical formula Ag2CO3, and a silver oxide represented by a chemical formula AgO. This cold storage material has a melting point of 2 degrees Celsius or higher and 8 degrees Celsius or lower and a crystallization temperature of 0 degrees Celsius or higher and lower than the melting point.