47 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.

[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 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.

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 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.

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.

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

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.

[Problem] To provide a purification method of a phosphorus compound capable of suppressing generation of by-products in distillation. [Means for Solution] The purification method of a phosphorus compound of the present invention includes the following steps: a step of obtaining a mixture containing a specific phosphorus compound, a specific alkenyl phosphorus compound, and a transition metal complex; and a step of adding a Lewis acid to the obtained mixture, and performing distillation to obtain a first distillate component containing the specific phosphorus compound.

This invention belongs to the field of high-purity inorganic material preparation technology, and relates to a method for preparing ultra-high-purity lead fluoride from lead oxide based on supercritical complexation extraction. Using lead oxide as raw material, lead acetate is synthesized through acetylation, deep purification through SCC-CO2 supercritical complexation extraction, and fluorination precipitation to prepare 5N-grade ultra-high-purity lead fluoride. Lead acetate is a strongly polar ionic organic salt with high lattice energy, and it is almost insoluble and does not leak in the SCC-CO2 system. Cu, which is present as an associated component in the raw material... 2+ Fe 3+ Zn 2+ Cd 2+ Bi 3+ Impurity metal ions, under the action of a complexing agent, form weakly polar, fat-soluble metal complexes, which are then efficiently extracted by supercritical CO2 and continuously carried out of the system, achieving deep separation of lead acetate from impurities. The purified ultra-high purity lead acetate reacts with ultra-high purity hydrofluoric acid to directly produce 5N grade ultra-high purity lead fluoride with a purity ≥99.995%. This method is suitable for industrial production due to its simple process, environmental friendliness, high impurity removal depth, and stable preparation of ultra-high purity lead fluoride.

Provided is a method that allows for a safer production of a naphthylsilole for use as a starting material for GNR, which involves reacting a compound of formula (1):(wherein R1a and R1b are the same or different and represent a hydrogen atom, an alkyl group, a cycloalkyl group, a (poly)ether group, an ester group, a halogen atom, an aromatic hydrocarbon group, or a heterocyclic group; R1a and R1b are optionally bound to each other to form a ring; R2 represents an aromatic hydrocarbon ring or a heterocyclic ring; and X represents a bromine or iodine atom) with a lanthanide- and lithium-containing ate complex to produce a lanthanide complex of the compound of formula (1); and then reacting it with a silyl compound of formula (2):R3aR3bSiCl2  (2)(wherein R3a and R3b are the same or different and represent an optionally branched C1-C4 alkyl group or a phenyl group).

The present application relates to sewage treatment technical field, specifically to a kind of removal method of radium thorium in wastewater.The pH of wastewater is adjusted to 4~10, insoluble divalent metal source is added to carry out nucleation reaction, alkali hydroxide and soluble divalent metal source are added to carry out pre-crystallization, soluble trivalent metal source is added to carry out crystallization-adsorption complex after solid-liquid separation.The present application uses the method of in-situ hydrotalcite generation in wastewater to remove hydrotalcite, while in-situ hydrotalcite adsorption material, suitable valence complex formed by thorium radium can directly react, and in the process of directly synthesizing hydrotalcite in wastewater, thorium radium nuclide is more easily into the vacancy of hydrotalcite, and the removal rate of radium is higher.Moreover, compared with the method of preparing hydrotalcite first and then used for removing thorium radium, the method of in-situ hydrotalcite generation in wastewater provided by the present application is shorter in time consumption, wastewater treatment process is simpler, and wastewater treatment efficiency is higher.

A process for removing heavy métal ions from a phosphoric acid containing stream, 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 heavy métal ion complexes; and separatingthe heavy metal ion complexes from the phosphoric acid containing stream.

This invention provides a method for producing hydrogen storage compounds under mild conditions and with reduced environmental impact. It also provides a method for producing hydrogen through this hydrogen storage compound production method. [Solution] A method for producing a hydrogen storage compound, comprising electrolytically hydrogenating a ketone compound in water containing an electrolyte in the presence of a metal complex catalyst to obtain a secondary alcohol compound, A method for producing a hydrogen storage compound, wherein the ketone compound is at least one of a bicyclomonoketone compound and a polyvalent ketone compound.

The application discloses a preparation method of acetylacetone platinum / palladium. First, an acetylacetone quaternary ammonium salt complex is prepared, then any one of M2X(NO2)4, M2X(NO2)2Cl2, M2X(NO2)2Br2, M2X(NO2)2I2, X(NO2)2Cl2 and X(NO2)2(NH3)2 (X=Pt or Pd, M=K, Na or NH4) is used as a noble metal precursor, an appropriate amount of acid is added, nitrogen oxide gas is discharged, the acetylacetone quaternary ammonium salt complex is reacted, and acetylacetone platinum / palladium is prepared. Oxygen atoms in the acetylacetone quaternary ammonium salt complex are coordinated with metal cation Pt 2+ to form a Pt-O bond, and a six-membered ring structure complex is formed. The acetylacetone platinum is purified by a dissolution-extraction method, the obtained product does not need to be further purified by recrystallization, and the purity is higher than 99%. The method has a simple synthesis process, no toxic and explosive solvent is used in the synthesis process, and the technical problems of harsh preparation conditions, large use of toxic reagents and complex process steps in the traditional method for preparing acetylacetone platinum are solved.

The application provides an electroplating solution and an electroplating method for preparing nanotwinned copper, wherein the electroplating solution comprises copper sulfate, sulfuric acid, chloride ions, a polyether-type inhibitor, a sulfur-containing accelerator, a main twinning inducer and a stress biasing component, the stress biasing component comprises metal ions or metal complexes, the metal ions are not copper ions, and the metal complexes are not copper complexes. The electroplating solution of the application can regulate the dynamic adsorption layer on the cathode surface, the copper nucleation density, the local internal stress and the (111) plane preferred growth by adding the main twinning inducer and the stress biasing component and the like, so that the nanotwinned copper with a high volume fraction can be prepared under the direct current electroplating condition.

The invention discloses a method for preparing p-chlorobenzaldehyde through selective oxidation of p-chlorotoluene, which comprises the following steps: in a stirring type reaction kettle, taking p-chlorotoluene or a mixture of p-chlorotoluene and p-chlorobenzaldehyde as a liquid-phase raw material, taking a variable-valence metal complex as a main catalyst, and taking chloride and / or iodide as a cocatalyst; introducing oxygen-containing gas to carry out oxidation reaction; the height-diameter ratio of the stirring type reaction kettle is (5-8): 1, and a stirring paddle and a porous sintering gas distributor are arranged in the stirring type reaction kettle; and the difference between the height-diameter ratio of the stirring type reaction kettle and the layer number of the stirring paddles is 2. By optimizing the reactor and the catalytic system, the reactant conversion rate and the p-chlorobenzaldehyde selectivity can be improved, the reaction temperature is greatly reduced, and the use of bromide is avoided.

The present application relates to the chemical industry field, specifically to a method for preparing boron trifluoride and its complex from dilute fluorosilicic acid and boric acid. The method comprises the following steps: (1) under heating condition, the dilute fluorosilicic acid reacts with the boric acid to obtain a water solution containing fluoroboric acid and silicon dioxide; (2) the reaction solution of step (1) is cooled, and after cooling, the fluoroboric acid filtrate is collected and the silicon dioxide filter cake is dried; (3) the fluoroboric acid filtrate is extracted with an extractant, the fluoroboric acid enters the oil phase, and the water phase returns to the phosphorite decomposition tail gas absorption system for fluorine absorption; (4) the fluoroboric acid oil phase is distilled under reduced pressure to remove residual water; (5) the fluoroboric acid oil phase from which water is removed is heated, and the fluoroboric acid is decomposed to generate a mixed gas containing boron trifluoride and hydrogen fluoride gas. The method has the advantages of cheap and easily available raw materials, simple process conditions, recyclable extractant, economic advantages and suitability for industrial production.

The invention provides a deplating solution and application thereof, and belongs to the technical field of metal surface treatment. The stripping solution provided by the invention comprises the following components: organic phosphonic acid, fluoride, an organic corrosion inhibitor and water, the molecular structure of the organic phosphonic acid has a plurality of phosphate groups, the organic phosphonic acid, zinc ions and nickel ions can form an extremely stable complex with good water solubility, and plating metal ions are stripped from the surface of a workpiece and stabilized in the solution; fluorine ions have extremely small ion radius and strong coordination capability, and can preferentially adsorb and penetrate through an oxidation film to react with metal oxides in the oxidation film to generate a soluble fluorine-oxygen complex, and a fresh metal layer is exposed to be complexed and dissolved by organic phosphonic acid; the core function of the organic corrosion inhibitor is selective adsorption and protection, and the organic corrosion inhibitor can be preferentially adsorbed on active points of an exposed matrix to form a layer of compact monomolecular protective film, so that the corrosion reaction of the stripping solution to the matrix is inhibited; and meanwhile, the deplating solution is green and environment-friendly.

The invention relates to a preparation method of modified lignin-based porous carbon, which comprises the following steps: (1) integrated synergistic pretreatment: preparing a mixed aqueous solution from phosphoric acid, aromatic boric acid and transition metal-pyridine complex salt according to a mass ratio of 100: (20-35): (15-25), heating and impregnating lignin, and drying to obtain a pretreated material; (2) carbonizing the pretreated material, mixing the carbonized pretreated material with a chemical activator, and carrying out heat treatment in an inert atmosphere to obtain a porous carbon crude product; (3) purifying and grinding the porous carbon crude product to obtain primary porous carbon; and (4) carrying out heat treatment on the primary porous carbon in a reducing atmosphere to obtain the modified lignin-based porous carbon. Through integrated synergistic pretreatment, a tough pre-crosslinked network is constructed, the obtained porous carbon has the characteristics of high mechanical strength, high specific surface area (greater than or equal to 2000m < 2 > / g), boron / nitrogen co-doping and low oxygen content (less than or equal to 3.0 wt%), and the silicon-carbon negative electrode material prepared by taking the porous carbon as the carrier has excellent electrochemical performance.