62 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 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.

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.

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

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.

The invention relates to the technical field of scattered metal metallurgy, and particularly discloses a method for separating indium from low-concentration indium-enriched liquid based on supercritical extraction, which comprises the following steps: carrying out pH regulation and fluorine ion capture pretreatment on acidic indium-enriched liquid, and then filtering; synthesizing a perfluoroalkylated phosphonate complexing agent, compounding the complexing agent with a cosolvent, and adding a pretreatment solution to pre-complex indium; the indium complex is dynamically extracted and dissolved through supercritical CO2; introducing the indium-loaded CO2 fluid into a hydrochloric acid solution, and applying ultrasonic wave to strengthen reverse extraction to obtain an indium-rich solution; the indium-rich liquid is subjected to electrolytic refining to obtain high-purity indium; and finally, depressurizing and recovering a complexing agent and cosolvent mixture. According to the method, high-selectivity extraction of indium is achieved by synthesizing the perfluoroalkylated phosphonate complexing agent and cooperating with supercritical CO2, impurities are inhibited by combining accurate pH regulation and fluorine capture, the reverse extraction efficiency is enhanced through ultrasonic waves, the indium recovery rate and the impurity removal rate are greatly increased, cyclic utilization of reagents is achieved, and the method is suitable for green recovery of indium resources.

This invention provides a method for detecting trace amounts of antimony trifluoride in eluents, relating to the field of chemical detection technology. The method involves adding hydrochloric acid solution to the eluent to dissociate the antimony trifluoride, followed by adding boric acid to form a complex with fluoride ions, thus avoiding the influence of fluoride ions on the detection of antimony ions. This method offers high accuracy and can be used for detecting trace amounts of antimony trifluoride in eluents.

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.

The present invention discloses the synthesis and application of a catalyst for the selective oligomerization of ethylene, and relates to the synthesis and application of a catalyst for ethylene tetramerization, which is composed of a transition metal compound, a ligand compound and an alkylaluminum cocatalyst. When the ethylene oligomerization catalyst system using the silicon-nitrogen-boron compound claimed in the present invention as a ligand catalyzes the ethylene oligomerization reaction, it has strong coordination ability, can form a relatively stable complex with the transition metal; the electrons on the nitrogen atom are fed back to the boron atom center, and the ligand is not prone to electron transfer reactions, the catalyst has high activity, high selectivity for 1-octene, and fewer side reactions; various substituents can be conveniently modified on the silicon atom; it has a novel structure, is easy to prepare, and has good solubility.

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 disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t0, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t1>t0, where t1−t0 is greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

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.