15 results about "Palladium chloride" patented technology

The application discloses a preparation method of a phenylacetic acid compound, and particularly, the application uses a substituted or unsubstituted aromatic hydrocarbon as a starting material, and under the action of a palladium catalyst (such as palladium acetate, palladium on carbon, palladium chloride, tetra-triphenyl palladium, etc.), the starting material is reacted with formaldehyde, HCl (aq) and CO to efficiently generate the phenylacetic acid compound. The method disclosed by the application only needs to start from the aromatic hydrocarbon, greatly reduces the difficulty and cost of obtaining the raw material, and avoids stimulating, sensitizing or toxic raw materials. Compared with the prior art, the method disclosed by the application has the advantages of simplicity and efficiency, cheap and easy-to-obtain raw materials, high atomic economy, high yield, green and pollution-free, easy industrialization and the like.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

This invention discloses a catalyst for the synthesis of indoxacarb intermediates and its preparation method, belonging to the field of precious metal catalyst preparation technology. The preparation method includes the following steps: S1, adding a surfactant and 1-2 mol / L hydrochloric acid to an aqueous ethanol solution to obtain solution A; adding an aminosilane coupling agent and tetraethyl orthosilicate to the aqueous ethanol solution for hydrolysis to obtain solution B; mixing solutions A and B, then adding an ethanol solution of modified phenolic resin, reacting, washing, and freeze-drying to obtain a solid; S2, subjecting the solid obtained in S1 to low-temperature thermosetting, followed by calcination under an inert atmosphere to obtain a support; S3, mixing the support with a palladium chloride solution, shaking at room temperature, drying, and reducing under hydrogen to obtain the catalyst. This invention, through a three-step synergistic process, ultimately enables the catalyst to exhibit high activity and high selectivity in the synthesis of indoxacarb intermediates.

The application discloses a preparation method and application of a hollow conjugated microporous polymer. It belongs to the field of photocatalytic organic synthesis and comprises the following steps: step S1, dispersing SiO2 nanosphere templates in a triethylamine solvent; step S2, adding 4,7-dibromo-2,1,3-benzothiadiazole, dichlorobistriphenylphosphine palladium and cuprous iodide; step S3, slowly adding a toluene solution of 1,3,5-triethynylbenzene; step S4, heating, stirring, washing, etching with a hydrofluoric acid solution, washing and drying to obtain the hollow conjugated microporous polymer. The hollow spherical structure of the hollow conjugated microporous polymer enhances light capture; high specific surface area and hierarchical pores promote mass transfer and active site exposure; the D-A type conjugated system constructed by BT units effectively narrows the band gap, expands the visible light response range and greatly improves the charge separation efficiency; and the all-organic composition makes the hollow conjugated microporous polymer environmentally friendly and relatively low in cost.

This invention discloses a low-concentration colloidal palladium activation solution, its preparation method, and its applications. The solution comprises 0.02-0.08 g / L palladium chloride, 20-60 ml / L hydrochloric acid, 100-150 g / L sodium chloride, 150-250 g / L tin salt, 1-10 g / L tannic acid (antioxidant), 0.5-5 g / L alkoxy ethers containing carbon-carbon triple bonds (wetting agent), 0.1-1 g / L dodecylpyridine chloride (charge adjuster), and the balance deionized water. The preparation method involves stepwise dissolution, high-temperature reaction under carbon dioxide protection, and high-pressure homogenization. The final product's colloidal particle size is controlled to be D90≤40 nm, D50≤20 nm, and the Zeta potential is between -50 and -40 mV. This invention combines specific formulations, preparation processes, and strict physical property indicators, enabling colloidal palladium activation solutions to possess both excellent stability and catalytic activity at extremely low palladium content (≤50ppm), making them applicable to horizontal production lines. Moreover, it is low-cost, simple in process, and can be mass-produced.

This invention relates to the field of bis(cyanobenzene)palladium dichloride preparation technology, and discloses a method for preparing bis(cyanobenzene)palladium dichloride, comprising the following steps: mixing benzonitrile and palladium chloride in a certain proportion and grinding them in a grinding device; after grinding, drying the mixture to obtain high-purity benzonitrile palladium chloride. This method for preparing bis(cyanobenzene)palladium dichloride achieves high purity of the product with a high yield under low temperature and less solvent process conditions, with a product purity exceeding 99.9%, high safety, and greatly reduces energy consumption and environmental pressure. It is also very beneficial for producing high-purity pharmaceutical and liquid crystal products, enabling people to enjoy a better life.

This invention discloses a palladium-based bimetallic ene catalytic material modified with polyaniline molecules, its preparation method, and its application. The preparation method includes the following steps: preparing a DMF solution of potassium palladium chloride and cerium chloride; preparing a mixed solution of KOH, DMF, and EG; adding the potassium palladium chloride and cerium chloride solutions dropwise into the mixed solution, then adding polyaniline molecules, followed by DETA; placing the mixed solution into a stainless steel high-pressure reactor lined with Teflon for hydrothermal reaction; after the reaction, cooling to room temperature, centrifuging, washing, and drying to obtain the palladium-based bimetallic ene catalytic material. The raw materials used in this invention are inexpensive and readily available. The prepared material, when used as the negative electrode of a proton exchange membrane fuel cell, exhibits a high power density. This method is simple, cost-effective, easy to operate, and can be mass-produced.

The present application belongs to the cross field of energy saving and environmental protection and advanced manufacturing industry technology, and particularly relates to an environmental protection device for high-value utilization of new energy electrolyte dimethyl carbonate waste liquid. The device is particularly suitable for an industrialized DMC production system using synthesis gas as raw material and palladium chloride as catalyst, can realize efficient reuse of nitric acid components in the waste liquid, effective removal of chloride ions and zero hazardous waste discharge in the whole process, and has significant energy saving, emission reduction and cost reduction advantages. The present application not only solves the problem of high-salinity wastewater treatment in the traditional process, but also realizes the technical leap from "end treatment" to "source control" and "resource recycling" through process reconstruction and equipment innovation, and promotes the transformation and upgrading of the DMC industry to the green and low-carbon direction.

The invention belongs to the technical field of nano materials and biological catalysis, and particularly relates to a preparation method of cerium atom doped palladium particle nano enzyme. The method comprises the following steps: uniformly mixing palladium chloride and cerium chloride which are used as metal precursors, phloroglucinol which is used as a reducing agent and a mixed solution of oleylamine and octadecene which is used as a solvent and a dispersion medium, carrying out high-temperature reaction in a closed reaction kettle, and centrifuging, washing and drying a reaction product to obtain the Ce atom-doped Pd nano-particles with waxberry-shaped morphology. According to the invention, Ce is embedded into a Pd lattice in an atomic-scale dispersion form, and most of Ce is located at the junction of the Pd (111) and Pd (100) crystal faces to form a d-f orbital hybrid structure, so that the electron transfer ability of the material is significantly enhanced. The prepared nano-enzyme has excellent catalase-like activity and oxygenase-like activity at the same time under the weak acid condition, the activity of the two enzymes can be efficiently cascaded, and the catalytic activity is remarkably improved compared with that of the nano-enzyme without Pd doping.

The utility model discloses a kind of palladium chloride crystal subpackaging bottle, it is related to palladium chloride storage field, including bottle body, the outer wall of bottle body is equipped with first protective housing, the outer wall of bottle body is equipped with second protective housing, the inner wall of second protective housing is equipped with bolt group, the outer wall of first protective housing is equipped with rotating shaft.The utility model is equipped with first protective housing, second protective housing, bolt group, rotating shaft and sealing strip, and first protective housing and second protective housing can be set, when bottle body is impacted and falls, effectively protect bottle body, effectively improve its durability, by unlocking bolt group, second protective housing is opened, bottle body is taken out, first protective housing and second protective housing are cleaned and replaced, and sealing strip can block water flow and impurities that seep from the gap between first protective housing and second protective housing.

This invention relates to a method for synthesizing phenylhydrazine hydrochloride, belonging to the field of pharmaceutical synthesis technology. Using palladium chloride as a catalyst and sodium ethoxide as a basic agent, under conditions of 50-55°C, an oxidative addition reaction first occurs with the bromine atom on a haloaromatic compound with a bromine atom at the para position, increasing the oxidation state of palladium and forming a highly reactive palladium intermediate. Sodium ethoxide neutralizes the generated hydrogen bromide, driving the reaction forward. The lone pair electrons on the nitrogen atom in hydrazine hydrate attack the palladium intermediate, undergoing a nucleophilic substitution reaction, attaching the nitrogen atom to the carbon atom bonded to the bromine atom. The palladium intermediate then undergoes a reduction reaction, restoring the oxidation state of palladium and generating phenylhydrazine compounds. Simultaneously, palladium chloride is regenerated and can continue to participate in the catalytic cycle. Ethanol serves as the reaction solvent, providing a homogeneous environment for the reaction. Hydrochloric acid is then added to the reaction system, where hydrogen ions combine with the nitrogen atom in the phenylhydrazine molecule to form a stable salt.

FIELD: metal science.SUBSTANCE: group of inventions comprises a method for producing a coating for capturing platinum group metals and a mesh made of a heat-resistant alloy for capturing platinum group metals. Said method includes impregnating the surface of a carrier, which is a mesh made of a heat-resistant alloy, with an aqueous solution of tetraammine palladium (II) chloride [Pd(NH3)4]Cl2 and subsequent drying. After drying, said mesh is subjected to heat treatment in a hydrogen atmosphere at a temperature of 350 to 450 °C for the recovery of palladium. Said mesh comprises a coating obtained by the said method and representing a layer of metallic palladium with a particle size of 5 to 30 nm.EFFECT: obtaining a coating on the surface of a mesh made of a heat-resistant alloy for capturing platinum group metals, which ensures a reduction in the removal of platinum group metals due to the formation of a chemically active palladium coating with increased adhesive strength on the surface of the mesh.13 cl, 1 tbl

The application provides a synthesis method of a 4-cyano-2-fluoro-5-methyl benzoate method, relates to the technical field of organic chemical synthesis, and comprises the following steps: raw material 5-fluoro-2-methyl benzonitrile is added into methanol under the condition that the temperature is room temperature; then, a catalyst, 1,1-bis(diphenylphosphino) ferrocene palladium dichloride dichloromethane complex and triethylamine are added into the reaction solution; the reaction is carried out under the condition that the carbon monoxide gas pressure is 15 psi and the temperature is 60-70 DEG C until the reaction is completed; after the reaction is completed, the reaction solution is poured into water; the aqueous phase is extracted with ethyl acetate; the organic phases are combined and washed with saturated brine; the obtained mixture is dried with anhydrous sodium sulfate, filtered, and spin-dried and columned to obtain a product; the synthesis method has a short process route, the raw material and auxiliary materials are cheap and easy to obtain, the reaction activity is high, the operation is simple and easy to control, the yield of the obtained target product is high, and the method is convenient for industrial amplification.

The application relates to the field of new energy chemical catalysis, in particular to a catalyst for photo-thermal catalysis of methane to formaldehyde under gas-solid continuous flow and a preparation method and application thereof. The preparation method comprises the following steps: S1, pretreatment carrier preparation; S2, precursor solution preparation: S201, adding a palladium chloride solution to a zinc oxide suspension, stirring at room temperature, vacuum suction filtration, washing and drying to obtain a Pd / ZnO precursor; S202, dispersing the Pd / ZnO precursor in deionized water, adding a rare earth metal salt, then adding triethylenetetramine dropwise, stirring, and then adding sodium hypophosphite to obtain a precursor solution; S3, composite precursor preparation; S4, post-treatment. The application provides a catalyst for photo-thermal catalysis of methane to formaldehyde under gas-solid continuous flow and a preparation method and application thereof, so as to solve the problems of great difficulty in methane C-H bond activation, easy deep oxidation of formaldehyde and low operation efficiency of the catalyst in a gas-solid continuous flow system in the related art.