23 results about "Palladium ion" patented technology

The invention discloses a graphite phase carbon nitride adsorbent rich in cyano groups on the surface and a preparation method and application thereof.The preparation method comprises the steps that a precursor of carbon nitride and alkaline potassium salt are dissolved in deionized water respectively, then the precursor of carbon nitride and the alkaline potassium salt are stirred and mixed to be uniform, evaporative crystallization is conducted, and a crystal mixture is obtained; and grinding the crystal mixture, calcining at high temperature, further grinding, washing and drying to obtain the graphite phase carbon nitride adsorbent rich in cyano groups on the surface. The surface electrification and the characteristic functional group type of the graphite phase carbon nitride are regulated and controlled through the alkaline sylvite, the synthesis process is easy and convenient to operate, large-scale production can be achieved, and excellent adsorption performance on palladium ions in acid wastewater is achieved.

The invention discloses a palladium ion recovery device, and relates to the field of metal recovery technology, the palladium ion recovery device comprises a filtering device and a resin exchange device, a first liquid conveying pipe is arranged between the filtering device and the resin exchange device, the first liquid conveying pipe is provided with a water pump, and the resin exchange device is provided with a feeding device; the resin exchange device comprises an exchange box, a plurality of storage baskets and a plurality of permeable plates, a plurality of first through openings are formed in one side of the exchange box in the transverse direction, the storage baskets and the permeable plates are in one-to-one correspondence and are all located in the exchange box, the permeable plates are located below the storage baskets and attached to the storage baskets, and second through openings are formed in the lower ends of the storage baskets. The permeable plate is fixedly connected to the inner side of the exchange box and horizontally arranged, the storage baskets are slidably connected with the permeable plate in the transverse direction, the same supporting plate is fixedly arranged on the sides, close to the first through opening, of the multiple storage baskets, and a moving part is arranged on the outer side of the exchange box and used for driving the supporting plate to move. The resin replacement device has the effect of improving the resin replacement convenience.

The application provides a palladium ion extractant material and a preparation method thereof, and the pyridine-oxadiazole ligand is used as the extractant, most Pd 2+ in the aqueous phase can be extracted into the organic phase in a short time, and has a very high extraction rate; selective extraction separation of Pd 2+ under acidic conditions can be realized, the applicable range of acidity is wide, and excellent extraction capacity is achieved in the range of 0.2-4M nitric acid concentration; the extractant has excellent selectivity to Pd 2+ in the aqueous phase containing various metal ions; the pyridine-oxadiazole extractant has a good application prospect in the separation and recovery of Pd 2+ in high-level radioactive waste; the m-nitro-trifluorotoluene is used as a diluent of the extraction system, has good solubility to the organic ligand and the extractant, and the 2-bromohexanoic acid can increase the lipophilicity of the extractant.

The invention belongs to the technical field of precious metal recovery, and particularly relates to a high-adsorption-capacity precious metal adsorbent and a preparation method and application thereof. The invention provides a high-adsorption-capacity precious metal adsorbent. The high-adsorption-capacity precious metal adsorbent is prepared by crosslinking polyethyleneimine and carbon disulfide, the high-adsorption-capacity precious metal adsorbent is insoluble in water and has a porous structure. The adsorbent disclosed by the invention has relatively high adsorption capacity on trivalent gold ions and divalent palladium ions at the same time; meanwhile, the adsorbent has excellent adsorption selectivity on trivalent gold ions and divalent palladium ions. The adsorbent disclosed by the invention can be recycled after desorption, and is a saving type material; and the preparation method is simple, mild in synthesis condition, low in raw material cost and easy to industrialize.

The application discloses a palladium ion recovery device and relates to the field of metal recovery technology, which comprises a filtering device and a resin exchange device, a liquid conveying pipe one is arranged between the filtering device and the resin exchange device, the liquid conveying pipe one is provided with a water pump, a feeding device is arranged on the resin exchange device, the resin exchange device comprises an exchange box, a plurality of storage baskets and a plurality of water permeable plates, a plurality of through openings one are formed in the lateral side of the exchange box, the storage baskets and the water permeable plates are in one-to-one correspondence and are all located in the exchange box, the water permeable plates are located below the storage baskets and are attached to the storage baskets, the lower end of the storage basket is provided with a through opening two, the water permeable plates are fixedly connected to the inner side of the exchange box and are arranged horizontally, the storage baskets are slidably connected with the water permeable plates along the lateral direction, a same supporting plate is fixedly arranged on the side of the plurality of storage baskets close to the through opening one, and a moving piece is arranged on the outer side of the exchange box and used for driving the supporting plate to move. The application has the effect of improving the convenience of resin replacement.

The invention discloses a preparation method of high-binding-force conductive microspheres for ACF (anisotropic conductive film), and belongs to the technical field of conductive materials. The method comprises the following steps: introducing a bifunctional sulfydryl functional reagent with sulfydryl and double bonds in a polymerization reaction process, and firmly combining the sulfydryl to the surface of a polymer microsphere; carrying out surface activation treatment by utilizing the strong affinity of sulfydryl to palladium ions; and forming a metal coating on the surface of the microsphere through chemical plating. Sulfydryl is stabilized through double-bond copolymerization, palladium ion adsorption and coating binding force are enhanced through the sulfydryl, and the binding strength of the conductive microsphere and a connecting substrate, the adhesive force of a chemical coating and a microsphere matrix and the conductive performance and long-term reliability of ACF are remarkably improved. The conductive microsphere prepared by the invention has the advantages of simple process, controllable cost, excellent performance and the like, is suitable for high-density and high-reliability electronic interconnection, and can be applied to the fields of preparation of anisotropic conductive adhesive films and packaging of related electronic products.

The invention discloses a hydrogenated rosin catalyst, the molecular formula of which is Pd / NiMg-HT, wherein the active component palladium ions (Pd) are dispersed in a hydrotalcite carrier in the form of nanoparticles, wherein the mass loading of the palladium ions is 0.2-0.5wt.%, and the molar ratio of the nickel ions to the magnesium ions is 1:1. The method of the invention adopts nickel and magnesium hydrotalcite as a carrier, maintains a certain speed and continuously stirs to fully mix and impregnate the carrier and the active component solution, the process is simple, and both nickel and magnesium are cheap metals, which can greatly reduce the preparation cost of the catalyst in industrial applications.

The invention relates to the technical field of conductive materials and electrochromism, in particular to a preparation method of a conductive substance modification material layer, a conductive glass electrode, conductive glass and a dynamic window. Palladium ions serving as a catalyst are finally adsorbed through the polymer layer, a more uniform catalyst layer can be formed on the surface, the voltage difference between the center and the edge of the Pd-ITO conducting layer can be effectively reduced, the metal deposition effect is good, transparent and opaque state conversion can be well achieved, and metal in the center and the edge is uniformly and rapidly deposited. In addition, the problems of raw material agglomeration and instability can be avoided, and the preparation method has the advantages of low raw material cost, short preparation time, high preparation efficiency, simple and rapid process and facilitation of commercialization, and can be well applied as an electro-glass electrode and applied to preparation of conductive glass and dynamic windows.

The present disclosure provides a method for eliminating spurious peaks of a silver-based surface-enhanced Raman substrate, including: preparing a palladium ion-containing solution; using the palladium ion-containing solution to modify the surface of the silver-based surface-enhanced Raman substrate so that the palladium ions combine with the surface to form a thin layer of palladium atoms covering the surface; wherein the thin layer of palladium atoms is used to remove adsorbed impurities and oxidation substances on the surface. Without damaging the sensitivity of the silver-based SERS substrate, this method eliminates the interference of impurity peaks adsorbed on the silver-based substrate, solves problems such as easy oxidation of nano silver, and moreover, this method has a simple operation process, extremely low cost, and is easy to promote and mass-produce.

The invention relates to a carbon quantum dot, a palladium ion detection method, a CNN (Convolutional Neural Network), a yellow LED (Light Emitting Diode) and application of the yellow LED in mung bean growth. The carbon quantum dot synthesis method is low in detection and preparation cost. In addition, the Pd < 2 + > and the carbon quantum dots are based on a static quenching effect and light-induced electron transfer, on one hand, the Pd < 2 + > increases the emission wavelength of the carbon quantum dots, and on the other hand, the carbon quantum dots have relatively strong detection specificity on the Pd < 2 + >.

The invention discloses a naphthalimide fluorescent dye as well as a preparation method and application thereof, and relates to the technical field of fluorescent dyes, a naphthalimide compound is taken as a two-photon fluorescent substrate, a palladium ion recognition group is introduced through chemical reaction, so that fluorescence of the compound is quenched, and the naphthalimide fluorescent dye is obtained; the naphthalimide fluorescent dye can generate a specific reaction after recognizing palladium ions, so that fluorescence is enhanced, and fluorescence emission with the wavelength of 460 nm is generated in an excitation state with the wavelength of 360 nm; by utilizing the opening characteristic, a powerful detection tool is provided for controlling the content of palladium ions in raw material medicines and chemical intermediates.

To separate palladium ions from a solution containing plural kinds of metal ions at a high speed with high selectivity.SOLUTION: The method for separating Pd ions is a method for selectively separating Pd ions from a solution containing a plurality of kinds of metal ions including at least Pd ions. The method for separating Pd ions includes a sorption step of electrochemically depositing and sorbing Pd on the surface of a thin film 12 by applying a reduction potential to a base material 11 in a state where a sorption body 10 having the base material 11 formed of a conductive material and the thin film 12 formed of Prussian blue (PB) and covering the surface of the base material 11 is immersed in a solution.SELECTED DRAWING: Figure 1

The present application relates to a kind of high-efficiency enrichment porous COF adsorbent of palladium and its preparation method and application, belong to composite material technical field.The high-efficiency enrichment porous COF adsorbent of palladium of the present application is recorded as COF-BcTd, and is generated by 1,3,5-benzene triformyl chloride and 1,3,4-thiadiazole-2,5 diamine acylation reaction, its structural formula is:the high-efficiency enrichment porous COF adsorbent of palladium can be used to efficiently and selectively adsorb enrichment palladium ion from solution, and has strong cyclic regeneration capacity.

The invention discloses a universal preparation method of an ultrathin palladium-based nanosheet, which uses ethylene glycol and N-N dimethylformamide (DMF) as solvents, and adopts a simple solvothermal method to reduce palladium ions and other metal ions into ultrathin palladium-based nanosheets with regular shapes and uniform sizes. The palladium-based nanosheets prepared by the invention have a unique two-dimensional structure, a large surface area and abundant active centers, enhance the adsorption capacity of nitrogen, reduce the reduction reaction barrier of nitrogen on its surface, and have good application prospects in the nitrogen reduction reaction process. The preparation method of the ultrathin palladium-based nanosheet of the invention is simple, economical, and suitable for industrial large-scale production.

The invention relates to a method for determining the content of palladium in palladium ash, and belongs to the technical field of precious metal secondary resource detection. The method comprises the following steps: uniformly mixing palladium ash and a mixed oxidizing agent, melting and decomposing, leaching by diluted hydrochloric acid, adding nitric acid, boiling to obtain a palladium ash sample solution, precipitating the palladium ash sample solution by dimethylglyoxime under an acidic condition, and dissolving by hydrochloric acid-hydrogen peroxide to prepare a palladium solution to be detected; taking the palladium standard stock solution, preparing a palladium standard working solution, determining the concentration of the palladium standard working solution by adopting an inductively coupled plasma emission spectrometer, and constructing a standard working curve; and according to the standard working curve, determining the palladium ion concentration of the palladium liquid to be detected by adopting an inductively coupled plasma emission spectrometer, and then calculating the palladium content in the palladium ash. According to the method, the decomposition capability of the sample is enhanced, the problems of limited palladium trapping capability and incomplete impurity separation of the existing method can be solved, and the accuracy of a palladium determination result is remarkably improved.

The invention discloses a porous carbon material for capturing palladium ions in highly-radioactive acid waste liquid and a preparation method of the porous carbon material. Glucose and melamine are used as a carbon source and a nitrogen source respectively, a nitrogen / oxygen co-doped carbon precursor is prepared through a hydrothermal reaction, then the precursor, an activating agent and a sulfur-containing co-activating agent are subjected to gradient heating activation, and the nitrogen / oxygen / sulfur co-doped porous carbon material is obtained. The porous carbon material disclosed by the invention has the characteristics of high nitrogen / oxygen / sulfur atom ratio, high mesoporous ratio, large specific surface area, wide pore size distribution range and the like, and has the advantages of high efficiency, high capacity, high selectivity and good stability when being used for capturing palladium ions in highly-radioactive acid waste liquid; in addition, the preparation method of the porous carbon material has the advantages of low cost, simplicity in operation and the like, and industrial production is easy to realize.

The application discloses a kind of nanometer materials for detecting tea polyphenols and ascorbic acid by spectrophotometry, and belongs to the field of chemical analysis.The nanometer material is prepared by the following method: first, using microbial matter as adsorbent to adsorb palladium ions in palladium ion solution, second, using filter membrane with pore size of 0.22 μm or 0.45 μm to separate the microbial matter adsorbing palladium ions, then adding reducing agent dropwise into deionized water suspending the microbial matter to reduce, and obtaining palladium nanometer material after cleaning.The prepared nanometer material is used for detecting the concentration of tea polyphenols and ascorbic acid by spectrophotometry, has good stability, is simple to operate, does not need to rely on complex instruments such as high performance liquid chromatography, and reduces the error of determining reaction end point by naked eye in titration method.

The utility model discloses a palladium ion activating agent preparation device which comprises a shell, a stirring tank, stirring assemblies, a motor, a first gear, a second gear, a double-gear ring, idler wheels, a rotating disc, a sliding rail, a sliding groove, a third gear, a stirring roller, buffering assemblies, supporting columns, balls, sleeves, threaded grooves and torsion springs. The buffer assembly comprises supporting columns, balls, sleeves, threaded grooves and torsion springs, the supporting columns are symmetrically fixed to the bottom end of the stirring tank, the sleeves are connected to the bottom ends of the supporting columns in a sleeved mode, and the sleeves are rotationally connected to the interior of the shell. The productivity of the device is greatly improved; the buffer assembly designed by the utility model not only can provide a good protection function and effectively prevent parts from being damaged, but also can reduce the running noise of equipment.

The invention relates to the technical field of surface treatment, and particularly discloses a thermal in-situ reduction preparation method of palladium nanoparticles on the surface of polyether-ether-ketone, which comprises the following steps: performing thermal in-situ reduction on palladium ions loaded in a polystyrene-poly (2-vinylpyridine) film into palladium nanoparticles; the surface of the polyether-ether-ketone is uniformly coated with a layer of palladium active particles with good binding force, the palladium active particles serve as a catalytic activity center of chemical plating, a coating on the surface of the polyether-ether-ketone is uniform, compact and high-binding-force attachment is achieved, and the pull-off strength of a welding spot of the coating is obviously improved; and the coating on the surface of the polyether-ether-ketone still keeps good bonding strength in a wide-temperature-range environment.

The present application relates to the technical field of palladium separation, and discloses a method for adsorbing and separating palladium ions from an acidic aqueous phase. A nitrogen-containing soft ligand as shown in formula I is loaded on a macroporous resin carrier to obtain a binary composite material, wherein R1 is a phenyl group or a substituted phenyl group, and R2 is an alkyl group or an aromatic group of C 1‑10 The binary composite material is mixed with an acidic aqueous solution containing palladium ions and other metal ions, and palladium ions are efficiently adsorbed and separated therefrom. The composite material of the present application can adsorb and separate palladium ions from an aqueous phase containing various metal ions, has good selectivity, fast adsorption speed, an adsorption rate of more than 85% and up to 97.4%, good separation effect, and the method is simple and easy to industrialize.

The application relates to a preparation method and application of a pyridine / amidoxime composite adsorbent. The application aims to solve the technical problems of poor structural stability, low adsorption capacity and poor selectivity of the current amidoxime-based adsorbent in a strong acid system. The prepared pyridine / amidoxime composite adsorbent is applied to capture gold ions and palladium ions in acid leaching solution. The application successfully constructs two kinds of composite adsorbents with excellent acid resistance by synchronously introducing pyridine amidoxime monomers at different sites on the dopamine-assisted graphene oxide surface. The two kinds of adsorbents respectively exhibit high-efficiency selective adsorption performance on gold ions and palladium ions under strong acid conditions. The prepared adsorbent can be applied to gradient recovery of gold and palladium in waste printed circuit board acid leaching solution, electroplating waste liquid and mining leaching solution.

The invention belongs to the technical field of PCB manufacturing, and discloses a manufacturing method of a PCB made of a high-thermal-conductivity material and the PCB. According to the manufacturing method, a Core press-fit manufacturing scheme is adopted, and daughter boards L1-L2 are manufactured through a milling step of milling the position of a ceramic volume processing area; manufacturing daughter boards L3-L4 through a milling step of milling the position of a ceramic volume processing area; pP manufacturing is carried out; the manufactured daughter boards L1-L2, the manufactured daughter boards L3-L4 and the manufactured PP are laminated with the mother board, and the PCB made of the high-heat-conduction material is manufactured. According to the invention, a Core press-fit manufacturing scheme is used, so that the matching problem of processing of different materials is solved. Laminating flatness is ensured, and the problem that product reliability is affected due to wire breakage and the like when wires pass through is avoided. And meanwhile, a corresponding process is added in the process to remove surface metal palladium ions so as to avoid a short-circuit phenomenon during chemical gold plating. The processing difficulty is reduced, and the yield is improved.

This invention relates to the field of ionic palladium activation solution technology, and discloses an ionic palladium activation solution for electroless copper plating and its preparation method. The ionic palladium activation solution comprises palladium sulfate, carbon nanoparticles, emulsifier, stabilizer, pH adjuster, and deionized water. This invention uses carbon nanoparticles instead of traditional complexing agents, which have a large specific surface area, strong adsorption performance, and numerous active sites, enabling the adsorption of more palladium ions and stronger adhesion to the substrate, thereby achieving a better activation effect and improving the backlighting effect and adhesion of the electroless copper plating layer.