78 results about "Ate complex" patented technology

Disclosed is a method for removing heavy metal ions from a phosphoric acid containing stream, the method may include: adding a diluted solution of a dialkyldithiophosphate compound having an alkyl chain length ranging from 8 to 12 carbon atoms to the phosphoric acid containing stream to form a heavy metal ion complex; and separating the heavy metal ion complexes from the phosphoric acid containing stream.

The invention is suitable for the application field of electrolyte acidity determination, and provides a method for determining the acidity of an all-vanadium electrolyte based on a complexing mass difference method, and the method comprises the following steps: taking the all-vanadium electrolyte, and diluting the all-vanadium electrolyte into a pretreated all-vanadium electrolyte with the concentration of 0.05-0.1 mol / L; adding 1.5-2mL of a complexing masking reagent with the molar concentration of 1.5-2mol / L, weighing, and recording as M1; stirring and titrating, weighing and recording as M2; a quantitative determination method of mass difference is used for calculation, and the formula is {(M2-M1)-0.05} / A * C. In conclusion, a mass difference quantitative determination method is adopted, the vanadium complexing masking reagent is added, the adding amount and the pH value of the vanadium complexing masking reagent are controlled, a stable complex is formed through the complexing masking reagent, vanadium ions and impurity ions, the oxidation-reduction reaction and the precipitation reaction of the complex and sodium hydroxide are inhibited, and the accuracy of the acidity value of the all-vanadium electrolyte is improved.

The invention aims to provide a method for preparing micron-sized zinc metastannate by wet recovery of tin and zinc in electronic wastes and a synthetic method of 4-hydroxy-1-indanone, and belongs to the technical field of metal recycling. According to the method, amino coordination and carboxylic acid chelation are utilized, tin and zinc in the electronic waste are selectively leached out under the mild acidic condition, impurity metals such as iron and copper are retained in residues due to the difference of complexing constants, and metal ion grade separation (selectivity gt and 99%) is achieved. And then, through evaporation-crystallization regulation and control, the Sn-Zn complex is directionally reconstructed into micron-sized zinc metastannate. In indanone synthesis, micron-sized zinc metastannate forms a local protonic acid environment by adsorbing trace moisture in a reaction system, synchronously activates a C = N bond (Lewis acid site catalysis) of an imine substrate and stabilizes a cyclization transition state (hydrogen bond guiding effect), so that the activation energy of [4 + 1] cycloaddition reaction is reduced, reaction equilibrium is driven to move towards a product end, and the yield of indanone is increased. And quantitative conversion of indanone under mild conditions (the yield is 60%) is realized.

The present invention relates to a disulfonate compound, a preparation method thereof, an electrolyte, and an energy storage device. The disulfonate compound has an #imgabs0# structure and is applied as an additive to an energy storage device, so that a stable SEI film can be formed on the negative electrode surface of the energy storage device, which can inhibit the decomposition of the solvent in the electrolyte. Since a stable SEI film can be formed on the negative electrode surface, the insertion and deintercalation of lithium ions at low temperatures become smooth, thereby improving the low-temperature performance of the energy storage device. On the other hand, the sulfonate group in the disulfonate compound can coordinate with transition metal ions to form a complex, passivating the positive electrode surface, inhibiting the dissolution of positive electrode metal ions, and reducing the decomposition effect of high-oxidation active substances on the solvent, thereby improving the electrochemical performance of the energy storage device under high-temperature conditions. In the energy storage device, the disulfonate compound can inhibit the increase of DC internal resistance, thereby improving the high-temperature performance and low-temperature performance of the energy storage device.

The invention relates to a synthesis method of 5, 5-disubstituted 2-isoxazoline, according to the method, oxime of a formula (II) and a carbonyl compound of a formula (I) react in the presence of a boron trifluoride complex and in the presence of an optional organic solvent or no solvent, the reaction conditions are mild, and the product yield is high.

[Problem to be Solved] An object of the present invention is to provide a method of purifying a phosphorus compound, which method is capable of reducing the generation of a by-product during distillation.[Solution to Problem] The method of method of purifying a phosphorus compound according to the present invention includes the steps of: obtaining a mixture containing a specific phosphorus compound, a specific alkenyl phosphorus compound and a transition metal complex; and subjecting the resulting mixture to distillation after adding a Lewis acid to the mixture, to obtain a first distillate containing the specific phosphorus compound.

The invention provides a plating bath for preparing a titanium-based lead dioxide electrode through electro-deposition and a preparation method of the plating bath, and relates to the field of plating baths, and the plating bath comprises lead p-toluenesulfonate, p-toluenesulfonic acid, fluoride of alkali metal and a dopant. The titanium-based lead dioxide electrode plating bath selects lead p-toluenesulfonate as a main salt and p-toluenesulfonic acid as an acid source, on one hand, the p-toluenesulfonic acid has a weak complexing effect and can form a complex with lead ions in the plating bath, the polarization effect of electro-deposition is increased, the compactness of a lead dioxide electro-deposition layer is improved, and the electrode stability is improved; on the other hand, p-toluenesulfonic acid serving as a hydrophilic organic molecule containing a large-pi conjugated system can be adsorbed on the surface of a lead dioxide crystal, growth of the lead dioxide crystal is regulated and controlled, electrodeposition distortion and internal stress of a lead dioxide active layer are reduced, and the accelerated life of an electrode is prolonged; and meanwhile, the p-toluenesulfonic acid can promote the dominant growth of beta-PbO2 with high catalytic activity, and is beneficial to improving the electrocatalytic activity of the titanium-based lead dioxide electrode.

The present invention relates to catalyst composition for cyclic carbonate production from CO2 and epoxides under mild conditions, which can effectively catalyze the cyclic carbonate synthesis and provides good selectivity to cyclic carbonate, wherein said catalyst composition comprising:a) the metal complex as shown in structure (I):wherein,M represents transition metal atom;R1, R2, and R3 represent independent group selected from hydrogen atom, halogen atom, alkyl group, alkenyl group, alkynyl group, alkoxy group, amine group, phenyl group, benzyl group, cyclic hydrocarbon group comprising hetero atom, perfluoroalkyl group, or nitro group;R4 represents group selected from alkylene group, cycloalkylene group, or phenylene group;X represents group selected from hydrogen atom, acetate group, or triflate group; andb) the organic compound as the co-catalyst selected from compound containing nitrogen, compound of quaternary ammonium salts, or compound of iminium salts.

The application provides a high-capacity long-cycle high-nickel positive electrode material and a preparation method thereof. The high-nickel positive electrode material is a compound shown in the following general formula: Li a Ni x Co y Mn z M 1‑x‑y‑z O2, M is selected from one or more of V, Ta, Nb, Sr, Mo, Mg, Al, Zr, Ti, Ca, La and W, 0.80<=a<=1.20, 0.6<=x<=1.0. The material can form an ion complex with lithium ions. When the compound is added to an aqueous solution, lithium ions can be complexed and then attached to the surface of the high-nickel positive electrode material, so that the excessive escape of lithium ions is prevented, the structural lithium loss of the material in the water washing process is minimized, and the high-nickel positive electrode material with the high-capacity characteristic is prepared.

This invention provides a novel powder and method for its use for the extraction and complexation of gold from sources containing this metal. The powder comprises an optimized combination of borax, sodium bicarbonate, and glycine as a triple buffer system, iodide ion as a leaching agent, a complementary combination of potassium persulfate and potassium monopersulfate (Oxone®) as an oxidant, and a copper salt as a catalyst for the oxidation-reduction cycle. In the proposed method, the powder is contacted with a solid gold-containing feed under mild alkaline conditions and ambient temperature to form a stable iodide-gold complex. This complex can be recovered to pure metallic gold through chemical or electrochemical reduction, and the leaching solution can be reused after recovery without loss of yield.

To provide a double fluoride composite capable of producing a dense molded article without using an auxiliary agent.SOLUTION: The complex fluoride composite has a core-shell structure of a core of a crystalline component or an amorphous component of a complex fluoride containing fluorine, an alkali metal element and a second metal element different from the alkali metal element, and a shell of an amorphous component or a crystalline component of a complex fluoride covering a part of the core, wherein the second metal element is at least one metal element selected from the group consisting of an alkaline earth metal element, aluminum, gallium, indium, zinc and yttrium.SELECTED DRAWING: Figure 1

The present invention discloses an SBA molecular sieve encapsulated with nano-metal atoms, its preparation method, and its application in the direct vapor-phase epoxidation of propylene. The preparation method comprises the following steps: 1) mixing SBA molecular sieve raw powder with a passivating agent for a first reaction, then mixing with an alkaline solution for a second reaction, filtering, washing, and mixing with a metal complex solution to obtain solution A, wherein the metal complex is selected from at least one of haloauric acid, haloauric acid salt, haloplatinic acid, haloplatinic acid salt, sodium chloropalladate, palladium trifluoroacetate, and sodium tetrabromopalladate; 2) mixing an organic template, water, an acid, and a silicon source to form a gel to obtain solution B; 3) mixing solutions A and B and performing hydrothermal crystallization, filtering, washing, drying, and calcining. In the molecular sieve prepared by this method, the nanoparticles are all located in the molecular sieve pores, thereby improving the catalytic performance of the catalyst. During the direct vapor-phase epoxidation of propylene, the catalyst exhibits excellent propylene oxide selectivity.

The invention belongs to the technical field of fuel cell cathode reaction oxygen reduction electrocatalysts, and particularly relates to a preparation method and application of an Agx / Co3-xO4 compound. Cobalt salt and silver salt are used as metal sources, citric acid is used as a complexing agent, a rheological phase reaction is adopted, a precursor complex is prepared through the steps of drying, foaming and the like, and then the electrocatalyst is prepared through muffle furnace heat treatment. A rheological phase method is used for promoting complexing of metal salt and citric acid. A small amount of reducing carbon generated during high-temperature pyrolysis of citric acid enables Ag < + > which should be doped in Co position in Co3O4 to be synchronously reduced into elemental Ag instead of being doped in crystal lattices, so that the Agx / Co3-xO4 compound with a special structure is obtained. Compared with a uniform mixture of common elementary substance Ag and Co3O4, the Agx / Co3-xO4 compound similar to in-situ growth prepared by the method has better ORR catalytic activity, and is expected to provide a new thought for preparing other metal element compounds, so that the requirement of energy equipment on a high-performance ORR electrocatalyst is met.

High purity precursor compositions and related methods are provided herein. The method includes obtaining a metal complex and a reagent. The method includes contacting the metal complex and the reagent to form a reaction product. The reaction product has a purity of at least 85% as determined by a thermogravimetric analysis (TGA) residue at 300° C. The reaction product can be used as a deposition precursor.

Disclosed is a biphenol metal complex. The structure thereof is as represented by formula I, wherein R1 and R1′ are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl; R3-R7, R3′-R7′ are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl, any two adjacent groups of R3-R7 are optionally linked to form a ring, and any two adjacent groups of R3′-R7′ are also optionally linked to form a ring; M and M′ are each independently selected from the Group 4 metals; each X is independently selected from the group consisting of a hydrocarbyl having 1 to 20 carbon atoms, hydride, amido, alkoxide, alkyl sulfide, alkyl phosphide, halide, diene, amine, phosphine, ether, and combinations thereof; m and n are independently an integer of from 1 to 4; and L is a divalent linking group.

The purpose of the present invention is to provide a metal complex with which a target gas, especially carbon dioxide, can be separated and recovered from a mixed gas with higher energy efficiency than conventional materials. The metal complex is composed of: a dianion of an aromatic 1,3-dicarboxylic acid compound; a metal dication selected from magnesium, calcium, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, rhodium, nickel, palladium, copper, zinc and cadmium; and an organic bidentate ligand having a bispyridylethylene structure, and has a structure including two-dimensional sheets stacked in mutual engagement.

The invention discloses a soil treatment process which comprises the following treatment steps: (1) putting soil into a reaction tank I, introducing an EDTA (Ethylene Diamine Tetraacetic Acid) aqueous solution into the reaction tank I, and carrying out complexation reaction on heavy metal ions in the soil and EDTA to generate an EDTA heavy metal complex; (2) after the soil and the EDTA aqueous solution are stirred, the soil and the EDTA aqueous solution are discharged into a filter tank together; (3) discharging the EDTA aqueous solution from the filter tank to a liquid accumulation tank; (4) introducing a sodium sulfide solution into the liquid accumulation tank, reacting sodium sulfide with the EDTA heavy metal complex to generate a precipitate of heavy metal sulfide, and separating EDTA from heavy metal ions; (5) introducing reactants in the liquid accumulation pool into a container tank, and separating the precipitate of the heavy metal sulfide from the liquid by the container tank through filtration; (6) introducing the liquid in the step (5) into a reaction tank II, adding hydrochloric acid and hydrogen peroxide into the reaction tank II, and reacting to remove excessive sodium sulfide; and (7) introducing the DETA aqueous solution in the reaction tank II into the reaction tank I through a pipeline. According to the soil treatment process provided by the invention, the EDTA solution is recycled, and the process cost is reduced.

The present invention provides a reaction method for enhancing the removal of heavy metal complexes and the directional recovery of heavy metals in wastewater through pulsed voltage, belonging to the field of electrochemical technology. The reaction method comprises the following steps: The reaction method uses two electrochemical workstations and a reactor containing a first cathode, a second cathode, an anode, and a reference electrode; when one electrochemical workstation provides a pulsed voltage to the first cathode or the second cathode, the other electrochemical workstation provides a constant voltage to the remaining cathode; during the reaction process, air or oxygen is continuously introduced into the reaction solution in the reactor. The dual-cathode electro-Fenton-like system proposed by the present invention does not require the addition of Fe 2+ or any chemical reagent, and the oxidant H2O2 is in-situ generated by the reduction of dissolved oxygen at the cathode, and the activation of H2O2 is induced by the intermediate products electro-oxidized and degraded at the anode - low coordination number heavy metal complexes or ionic heavy metals.

Provided is an immobilized zinc complex comprising at least: a compound represented by general formula (1) (where R1 and R2 each represent a monovalent hydrocarbon group, R3 represents a divalent hydrocarbon group, R4 to R7 each represent a hydrogen atom or monovalent hydrocarbon group, R4 and R5, R6 and R7, or R4 and R6 may be combined with each other to form a ring, and n represents an integer of 0-2); a zinc halide represented by general formula (2) ZnX2 (where X represents a halogen atom); and an inorganic carrier, wherein silicon atoms, in the zinc complex having a guanidine ligand, in which a nitrogen atom in the compound represented by general formula (1) and a zinc atom in the zinc halide are bonded via a coordinate bond, are immobilized via covalent bonds with oxygen atoms on the surface of the inorganic carrier. The immobilized zinc complex can provide a cyclic carbonate compound at a good yield under mild conditions such as ambient pressure and / or room temperature conditions, and can be easily recovered and reused after the reaction.

The invention discloses a preparation method of a carboxamide triazole intermediate, which comprises the following steps: reacting (4-bromo-3, 5-dichlorophenyl) oxy) (tert-butyl) dimethylsilane with p-chlorobenzoyl chloride under the catalysis of a metal organic magnesium lithium complex, and removing a hydroxyl protecting group to obtain the carboxamide triazole intermediate. The activity of the metal organic magnesium lithium complex is far lower than that of the butyl lithium, the safety is higher, the whole reaction does not need to be carried out at an ultralow temperature, and the activity of the metal organic magnesium lithium complex is lower, so that small impurities generated by coupling are much less than those generated by using the butyl lithium; and when hydrochloric acid is used for deprotection, the purity of the product in the reaction liquid is increased by nearly 10%, the purification difficulty is greatly reduced, and the product yield is increased. The (4-bromo-3, 5-dichlorophenyl) oxy) (tert-butyl) dimethylsilane can also be obtained through self-preparation, the whole process route is simple, the reaction raw materials are easy to obtain, the synthesis cost is low, the reaction conditions are mild, and the safety is high.

The invention discloses a rare earth doped aluminate nanocrystal capable of emitting light in a near-infrared second region through ultrasonic excitation as well as a preparation method and application of the rare earth doped aluminate nanocrystal. The preparation method comprises the following steps: mixing an alkaline earth metal ion compound, an aluminum ion compound, a rare earth ion compound and a polydentate ligand in water for complex reaction to prepare a metal ion chelate precursor; performing high-temperature solid-phase thermal decomposition reaction on the metal ion chelate precursor, performing surface fat-soluble molecular modification in a thermal solvent, and performing surface hydrophilization modification by adopting an amphiphilic polymer to prepare the rare earth doped aluminate nanocrystal capable of emitting near-infrared second region by ultrasonic excitation. The rare earth doped aluminate nanocrystal is prepared by adopting an amorphous complex high-temperature solid-phase thermal decomposition method, the reaction condition is controllable, the operation is simple, the repeatability is good, the used reagent is cheap and easy to obtain, the rare earth doped aluminate nanocrystal has the property of ultrasonic excitation near-infrared second-region luminescence, and the wavelength can be adjusted within 900-2500 nm.

A carbonaceous material according to the present invention has a ratio of mesopores of 6.4% to 50.0% inclusive, a reactive black 5 value of 1.0 g / L to 8.0 g / L inclusive, and an iodine adsorption amount of 1,000 mg / g to 1,600 mg / g inclusive.

The invention provides an oil-dispersible MHCF nano-particle as well as a preparation method and application of the oil-dispersible MHCF nano-particle. The material is oil-dispersible hexacyanoferrate metal (MHCF) nanoparticles, the molecular formula of the oil-dispersible hexacyanoferrate metal (MHCF) nanoparticles is KM [Fe (CN) 6], and M is one or more of nickel, vanadium, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, platinum and copper metal elements. The preparation method comprises the following steps: firstly, mixing an aqueous solution of an anionic metal cyano complex containing a metal atom Fe as a central metal with an aqueous solution of metal cations containing a metal atom M, and carrying out coprecipitation to obtain Prussian blue type MHCF nanoparticles; secondly, a solution obtained by dissolving a ligand in a solvent is mixed with the MHCF nano-particles for surface modification, and oil-dispersible NiHCF nano-particles dispersed in the mixed solution are obtained; and finally, carrying out post-treatment on the solution after the reaction, so as to obtain the oil-dispersible MHCF nano-particles.

Provided is an immobilized zinc complex comprising at least: a compound represented by general formula (1) (where R1 and R2 each represent a monovalent hydrocarbon group, R3 represents a divalent hydrocarbon group, R4 to R7 each represent a hydrogen atom or monovalent hydrocarbon group, R4 and R5, R6 and R7, or R4 and R6 may be combined with each other to form a ring, and n represents an integer of 0-2); a zinc halide represented by general formula (2)         ZnX2     (2) (where X represents a halogen atom); and an inorganic carrier, wherein silicon atoms, in the zinc complex having a guanidine ligand, in which a nitrogen atom in the compound represented by general formula (1) and a zinc atom in the zinc halide are bonded via a coordinate bond, are immobilized via covalent bonds with oxygen atoms on the surface of the inorganic carrier. The immobilized zinc complex can provide a cyclic carbonate compound at a good yield under mild conditions such as ambient pressure and / or room temperature conditions, and can be easily recovered and reused after the reaction.

The invention belongs to the field of high-temperature superconducting materials, and particularly relates to a gadolinium-ytterbium-barium-copper-oxygen superconducting film and a preparation method and application thereof, and the preparation method comprises the steps: S1, preparing a solution containing 2-thiophenyltrifluoroacetone; s2, adding gadolinium oxide and ytterbium oxide to react with nitric acid to obtain a mixed solution containing gadolinium nitrate and ytterbium nitrate, mixing the solution obtained in S1 with the mixed solution, adding a seed crystal to react, standing, separating and drying to obtain a gadolinium-ytterbium coordination complex; s3, mixing the gadolinium-ytterbium coordination complex obtained in S2, a barium source, a copper source and a solvent, and growing a gadolinium-ytterbium-barium-copper-oxygen superconducting film on the surface of the substrate through an organic metal chemical vapor deposition method by taking oxygen as an oxygen source; the molar ratio of gadolinium nitrate to ytterbium nitrate is (0.7-0.78): (0.22-0.3). The gadolinium-ytterbium coordination complex prepared by the invention is good in volatility and high in thermal stability; the generated film has few impure phases and holes, and the prepared film has a smooth surface and has excellent electrical performance and magnetic field performance under low temperature and high field.

This application provides a method for extracting gold from electronic waste using a cyanide-free gold leaching agent system based on the recycling of endogenous bromine, which belongs to the field of precious metal recycling technology. This method constructs a compound free radical initiator-ammonium chloride cyanide-free gold leaching agent system, utilizes bromine-containing flame retardant materials in electronic waste and ammonium chloride to construct an autocatalytic reaction system, significantly increasing the steady-state concentration of bromine free radicals, thereby enhancing the oxidation ability of gold, and directly oxidizing gold to generate Au. 3+ ; Cl in the pre-introduced ammonium chloride ‑ With Au 3+ Instant complexation to form [AuCl4] ‑ , achieving gold leaching, while NH4 + It forms a copper-ammine complex ([Cu(NH3)4] 2+ ), the complex will deactivate Br in a free radical environment ‑ It is reactivated to Br·, forming a complete closed-loop cycle of bromine radical oxidation-gold dissolution-bromine ion regeneration. This self-sustaining reaction mechanism not only stabilizes bromine radical concentration at an optimal level but also achieves a gold leaching rate of ≥98% under mild conditions.

One aspect of the present disclosure relates to novel cerium complexes comprising cerium (III) ions and exhibiting strong blue emission.SOLUTION: A cerium complex comprising a cerium (III) ion, a thiocyanate ion, and a coordinating compound that interacts with the cerium (III) ion. The coordination compound is the first compound, the second compound, or a combination of these compounds. The first compound is a base softer than triphenylphosphine oxide in the HSAB rule. The second compound is a base harder than triphenylphosphine oxide in the HSAB rule and has a substituent that suppresses an interaction between the second compound and a cerium (III) ion.SELECTED DRAWING: None

A method of detecting a heavy metal ion in an aqueous sample includes contacting a potassium salt of 5-(3,4,5-trimethoxybenzylidene) thiazolidine-2,4-dione (C13H12KNO5S) with the aqueous sample to form a heavy metal complex. The method further includes measuring the fluorescence emission of the aqueous sample to detect the heavy metal complex.

The present invention relates to the technical field of olefin polymerization catalysts. Disclosed are 5,6,7,8-tetrahydro-1-naphthol-phosphine post-transition metal complexes, a preparation method therefor, and the use thereof. The structure of the complexes is as shown in formula (I), in which R7-R11 are selected from hydrogen, halogens, hydroxyl, and substituted or unsubstituted C1-C15 hydrocarbyls, and R2 and R3 are selected from halogens, C1-C10 hydrocarbyls, P(R4)3, NR5R6 and OR12R13, wherein R4 is selected from substituted or unsubstituted C1-C10 hydrocarbyls, and R5, R6, R12 and R13 are selected from C1-C6 hydrocarbyls, or R5 and R6 are linked to N to form a five-membered ring or six-membered ring, or R12 and R13 are linked to O to form a five-membered ring or six-membered ring. Said complexes have good thermal stability, have relatively high ethylene polymerization activity at relatively high temperatures, and has a relatively good property of copolymerization with acrylate type monomers, prepared polymers having relatively good properties.