107 results about "GOLD CHLORIDE" patented technology

The invention discloses a gold-containing catalyst for preparing vinyl chloride by using an acetylene method as well as a preparation method and application of the catalyst. The catalyst contains a gold element, a lanthanum element, a cobalt element, a co-catalytic metal element and a carrier with a porous micro-structure. The gold accounts for 0.3%-2% by mass of the catalyst; the gold element in the catalyst comes from gold chlorides or gold nitrates; the cobalt element comes from chlorides of the cobalt or cobalt nitrates; and the lanthanum element comes from lanthanum chlorides or lanthanum nitrates. The catalyst disclosed by the invention in use is free from inactivation phenomenon caused by sublimation of industrial catalyst mercury chloride, has no pollution to the environment, overcomes defects of high toxicity and high pollution of the conventional industrial catalyst mercury chloride, has the characteristics of simple preparation method, high conversion rate of the acetylene and selectivity of the vinyl chloride, long service life up to 1000 hours or more, high temperature resistance, and high intensity and is renewable, and the conversion rate of the acetylene and selectivity of the vinyl chloride approximate to or exceed the technical indexes of the mercury chloride catalyst.

The invention discloses a method for preparing a gold nano particle and grapheme composite material through fast reduction. The method specifically comprises the steps of 1, preparing reduced grapheme oxide water solution by taking sodium borohydride as a reducer; 2, adding gold chloride acid in the reduced grapheme oxide water solution, and obtaining the gold nano particle and grapheme composite material in an in-situ reduction way by utilizing the reducibility of the grapheme through ultrasonic action under normal temperature; 3, centrifugally washing the obtained solution by using de-ionized water for multiple times so as to obtain the gold nano particle and grapheme composite material of which the dimension is uniform and the distribution is uniform. The method disclosed by the invention has the advantages that the technology is simple, the preparation period is short, the repeatability is strong, environment protection is realized, and a composite product is uniform and stable; the prepared gold nano particle and grapheme composite material has good stability in water solution and is not easy to reunite, and meanwhile, the method has the characteristics of multiple reaction active sites, large specific surface area, good biocompatibility, electric conduction and the like; the method has a wide application prospect in aspects of catalyzing, sensing, environment protection, SERS (Surface Enhanced Raman Scattering) and the like.

The invention provides a porous solid material supported ionic liquid-gold catalyst, as well as preparation and application thereof. The catalyst comprises a porous solid material carrier and a complex which is prepared from an ionic liquid and a metal ionic compound and is loaded on the carrier surface, wherein the metal ionic compound is a gold compound or a combination of a gold compound and a third metal chloride; the gold compound is selected from one of gold chloride, chloroauric acid, ethylenediamine gold chloride, chloro(triphenylphosphite)gold and chloro(triethylphosphine)gold; the third metal is selected from one of Cu, In, Bi, Ba, Sr, Fe, Mn, Zn, Co, Cs, K, Ca, Sn and Ni; and the ionic liquid is an imidazole ionic liquid. The porous solid material supported ionic liquid-gold catalyst has good chemical and thermal stability and high heat transmission efficiency in the reacting atmosphere for synthesizing vinyl chloride by ethyne hydrochlorination, and has the characteristics of high catalytic activity, high selectivity, good stability, low cost and the like.

The invention relates to a cyanide-free gold electroplating solution and an electroplating process using the same. The solution contains 180-200 g/L of a main coordination agent, 5-8 g/L of an auxiliary coordination agent, 20-30 g/L of potassium bicarbonate, 0.5-0.8 g/L of potassium gold chloride and 0.5-5 mL/L of a combined additive. The cyanide-free gold electroplating system solution is good in stability, dispersing capacity and covering capacity and high in current efficiency, a plating layer is flat and compact in crystallization and golden yellow and bright in appearance, the applied current density range is wide, the temperature requirement range is wide, the system can meet the requirement of long-term thick gold electroplating, and problems that the plating layer turns red, floating dust exists and the like are solved with the increase of the thickness of the plating layer during electroplating.

A process for preparing the gold nanoparticles features that the chlorauric acid or gold chloride is added to the alkaline aqueous solution of nitromethane to obtain the aqueous sol of gold nanoparticles. Its advantages are adjustable granularity, high speed and low cost.

The invention discloses a method for comprehensively recycling valuable metals from cyanidation tailings. The method comprises the following steps: fully mixing dried cyanidation tailings with a calcium chloride solution, wet grinding the mixed materials, granulating, drying and carrying out chlorination roasting in a rotary kiln to obtain high-temperature smoke containing valuable metals; washingthe high-temperature smoke to obtain a washing solution; carrying out concentration and pressure filtration of the washing solution to obtain gold chloride mud filter cake and filtrate containing valuable metals; adding iron powder into the filtrate containing valuable metals, and replacing to obtain iron powder gold mud and replaced filtrate; carrying out preneutralization, iron powder replacement and lime neutralization of the replaced filtrate to obtain gypsum residues, copper sponge and lead-zinc residues; carrying out chlorination and gold separation of the iron powder gold mud to obtaina chlorination and gold separation solution; carrying out ammonia water silver separation and hydrazine hydrate reduction of gold separation residues to obtain silver powder. The method is low in consumption of reagents low in production cost and is capable of comprehensively recycling multiple valuable metals; meanwhile, the method is high in recycling rate and simple to operate, and is environmentally friendly; the industrial production is easily achieved; harmlessness , reduction and reclamation of the cyanidation tailings are achieved.

The invention discloses an environment-friendly non-mercury catalyst for acetylene-method chloroethylene synthesis and a preparation method thereof. According to the non-mercury catalyst disclosed by the invention, a precious metal chloride, namely any of gold chloride, platinum chloride and palladium chloride, is adopted as a main active substance, wherein the content of the precious metal chloride accounts for 0.5-5% of the weight of the catalyst; an assistant active ingredient is one or more than one of non-precious metal chlorides, namely bismuth chloride, cuprous chloride, cerium chloride and zinc chloride, wherein the content of the non-precious metal chlorides accounts for 1-10% of the weight of the catalyst; and a support is one of coconut shell charcoal, fruit shell charcoal and coal charcoal. The non-mercury catalyst is prepared by a conventional impregnation method. The preparation method of the catalyst is simple and is environmental-friendly, few byproducts are generated, the stability of the prepared catalyst is good, the environmental pollution caused by mercury catalysts is avoided, the service life of the catalyst is prolonged, the acetylene conversion ratio can reach 96-99%, and the selectivity to chloroethylene is not lower than 98%.

The invention provides a chloride modified gold nano-channel membrane for detecting atrazine and a method for detecting the atrazine by using the gold nano-channel membrane. In the invention, polycarbonate membrane is taken as basilar membrane, Au nano-channel membrane with the diameter of 20-50 nm is prepared by using a chemical precipitation method, and chloride ions self-assembles to the pore wall of the gold nano-channel through a gold-chloride covalent bond. The detection method comprises the following steps of: placing the chloride modified gold nano-channel membrane between a sample injection pool and a transmission pool; adding a buffer solution containing atrazine antibody into the sample injection pool; adding a buffer solution into the transmission pool; maintaining a parallel liquid level of the two pools; applying voltage on the two pools and measuring basement currents; adding a buffer solution containing a sample to be tested into the sample injection pool and carrying out a current signal test through a electrochemical workstation, wherein if current undershoot occurs, the sample to be tested contains the atrazine. The invention has the advantages of high detectionefficiency, strong specificity, capability of measuring the atrazine with the concentration lower limit of 1.7*10-10 M, and better application prospect.

The invention relates to a preparation method of thorn-shaped gold nanoparticles and thrust-shaped gold nanoparticles prepared through the method. The method includes the following steps that step a, a first sodium citrate solution is added into a first boiled chloroauric acid solution, boiling is kept under the condition of constant stirring, and therefore a gold nanoparticle solution of which the particle size ranges from 10 nm to 30 nm is obtained; step b, a hydroxylamine hydrochloride solution and the gold nanoparticle solution are added into an acid gold chloride solution for performing growth control over the particle size, and large-particle-size gold nanoparticles are obtained in a centrifugal mode; step c, the large-particle-size gold nanoparticles are added into deionized water of which the pH is adjusted through a second sodium citrate solution, gold chloride is added under the condition of constant stirring for space limited-range core shell growth, and the gold nanoparticles can be obtained in a centrifugal mode. On one hand, the sodium citrate solutions are selected and used for adjusting the pH value of the solution, and on the other hand, the sodium citrate solutions have the unexpected advantages that the sodium citrate solutions are good stabilizers for the gold nanoparticles, and the particle size and the evenness of the gold nanoparticles are easily controlled.

The invention provides a method for enhancing the gold precipitation grade in a gold electrorefining process. According to the method, a coarse gold plate is adopted as an anode, a pure gold plate is adopted as a cathode, and a gold chloride solution is taken as an electrolyte solution to perform electrorefining. Specifically, the outside of the anode is sleeved with a pocket shaped diaphragm made of polypropylene fiber, and the mesh opening of the diaphragm is 800-850 meshes. The cathode is made by the method of: taking the coarse gold plate as the anode, adopting a titanium alloy plate as the cathode, and using a gold chloride solution as an electrolyte solution to conduct electrolysis, precipitating out a pure gold layer on both sides of the titanium alloy plate, and stripping the pure gold layer, thus obtaining a cathode plate used for gold electrorefining. The method provided by the invention effectively avoids adsorption of AgCl and part of insoluble metal impurities on the cathode, thereby enhancing the gold precipitation grade and ensuring the stability of gold electrolysis production. At the same time, by improving the quality of a gold starting sheet, the gold precipitation grade is further improved.

The invention relates to cyanide-free gold plating electroplate liquid for refractory metal wires. The cyanide-free gold plating electroplate liquid for refractory metal wires is characterized in that a solution in 1000 volume parts comprises the following components in parts by weight: 10-30 parts of gold chloride, 130-150 parts of anhydrous sodium sulfite, 80-110 parts of potassium citrate, 90-120 parts of potassium chloride, 5-10 parts of ethylene diamine tetraacetic acid disodium salt and 0.5-1 part of saccharin sodium salt. The electroplate liquid can be used for plating refractory metal in filaments and micro filaments; the obtained gold plated wires have the advantages of good bonding force of a plating layer and a base body, good product surface smoothness and high corrosion resistance.

The invention provides a lost foam coating with high fire resistance and a preparation method of the lost foam coating, and relates to the technical field of production of lost foam. The lost foam coating is prepared from the following components in parts by weight: 30-40 parts of magnesite powder, 25-30 parts of pearl powder, 15-25 parts of mica powder, 3-8 parts of petroleum coke powder, 3-8 parts of silica sol, 1-5 parts of white emulsion, 0.3-0.5 part of triethanolamine, 0.1-0.6 part of sodium carboxymethylcellulose, 1-6 parts of adsorbent and 0.3-2 parts of fire retardant; and the fire retardant comprises, by weight, 5-8 parts of perchloropentacyclodecane, 3-5 parts of chlorendic acid, 1-2 parts of melamine cyanurate and 3-4 parts of potassium gold chloride. The preparation method comprises the following steps: grinding and sieving the magnesite powder, the pearl powder, the mica powder, the petroleum coke powder, the sodium carboxymethylcellulose and the adsorbent; adding water in the adsorbent, the fire retardant, the sodium carboxymethylcellulose and the triethanolamine and mixing; and fully mixing the magnesite powder, the pearl powder, the mica powder, the petroleum coke powder, the silica sol and the white emulsion. During casting of workpieces, the lost foam coating is high in adhesive, free of residue, relatively good in fire resistance and high in stability; and production quality can be improved.

Nanoparticles may be formed on a substrate by mixing precursor solutions deposited by an inkjet printer. A first solution is deposited on a substrate from a first inkjet print cartridge. Then, a second solution is deposited on the substrate from a second inkjet print cartridge. The solutions may be printed in an array of droplets on the substrate. Nanoparticles form when droplets of the first solution overlap with droplets of the second solution. In one example, the nanoparticles may be gold nanoparticles formed from mixing a first solution of 1,2-dichlorobenze (DCB) and oleylamine and a second solution of gold chloride trihydrite and dimethyl sulfoxide (DMSO). The nanoparticles may be incorporated into optoelectronic devices.

The invention discloses nanometer gold spherical shell photosensitive liposome, which consists of a conventional drug liposome and a nanometer gold spherical shell structure. A preparation method for the photosensitive liposome mainly comprises the following steps of first combining cysteine to a liposome surface wrapped with wedelolactone to make the surface rich in sulphydryl groups; then reducing gold chloride to obtain nanometer gold particles by virtue of a reducing agent sodium borohydride; finally mixing sulphydryl-modified liposome and the nanometer gold particles according to a certain proportion, and performing incubation under a specific condition to obtain the nanometer gold spherical shell photosensitive liposome. The preparation method can be implemented under normal temperature, normal pressure and a mild condition, a process is simple, reaction is easy to control, and the obtained liposome is regular in shape, has particle size distribution of 200 to 250nm and high light-heat conversion performance, and can be used for effectively absorbing near infrared light of 700 to 850nm.

The invention discloses icosidodecahedron gold nanocrystal and a controllable preparation method thereof; the icosidodecahedron is composed of 8 low-crystal-face hexagonal sides and 24 high-crystal-face pentagonal sides, and each hexagonal side is provided with 6 pentagonal sides around; the controllable preparation method comprises: subjecting gold chloride (HAuCl4) to direct synthesis by one-step reduction of high-temperature reflux reduction method, with the cationic surfactant diallyldimethylammonium chloride (PDDA) as a protectant and morphological guide agent, and ethylene glycol (EG)/pentanediol (PD) as a solvent and reducing agent. The agents used herein are simple, easy to obtain, and green, the preparation method is simple and efficient and is highly repeatable, the yield of the prepared icosidodecahedron gold nanocrystal is higher than 95%, and the prepared icosidodecahedron gold nanocrystal has regular and unique morphology, good monodispersity and uniformly distributed particle size. The icosidodecahedron gold nanocrystal and the preparation method thereof are of important application value to the mass synthesis of multifaceted gold nanocrystal, and of important guide significance to the controllable synthetic preparation of other polyhedral noble metal nanocrystals.

The invention provides a multifunctional composite nanoparticle which is formed by combining a ferroferric oxide particle and a gold nanoparticle, wherein the ferroferric oxide particle forms a magnetic inner core and the gold nanoparticle forms an outer layer; and the diameter of the multifunctional composite nanoparticle is smaller than 100 nm. The preparation method of the multifunctional composite nanoparticle comprises the following steps: (a) the magnetic ferroferric oxide particle with functionalized surface sulfydryl is prepared; and (b) the magnetic ferroferric oxide particle with the functionalized surface sulfydryl is dissolved in a solution, and then gold chloride and a reducing agent is added into the solution so as to enable the gold nanoparticle to be grafted onto the ferroferric oxide particle to form the multifunctional composite nanoparticle, wherein the pH of the solution is adjusted to 7-10 before the reducing agent is added into the solution so as to control the diameter of the gold nanoparticle. The preparation method of the multifunctional composite nanoparticle is simple and efficient and has good repeatability. The multifunctional composite nanoparticle provided by the invention can remarkably enhance the effect of magnetic resonance imaging at a lower concentration, meanwhile can be used for bio-labelling by virtue of the gold nanoparticle, and is expected to bring the superiority of nanostructured drugs into play in the field of biological medicine.

The invention discloses red stone-imitating microcrystalline glass. According to the red stone-imitating microcrystalline glass, silicon, calcium, lithium, magnesium and barium are used as main components, rare earth metals are used for improving performance, and erbium oxide and gold chloride are used as colorants. The molded red stone-imitating microcrystalline glass is low in light transmittance and red in color, and the strength and hardness of the red stone-imitating microcrystalline glass can meet needs, so that the red stone-imitating microcrystalline glass can be used for imitating red jewelries. The harness of the red stone-imitating microcrystalline glass is close to 650Kg/mm<2>, the density of the red stone-imitating microcrystalline glass is close to 3g/mm<3>, and the harness and density of the red stone-imitating microcrystalline glass are close to those of the red jewelries.

The invention relates to a method for preparing an Au modified and TiO2 compound air purified functional textile at low temperature in situ. The method comprises the following steps of: (1) ultrasonically cleaning a textile by an acetone solution, drying and then treating the textile in a high-efficiency cleaning agent; (2) padding the textile into an antioxidative finishing solution LZQ, pre-drying and roasting at 130-150 DEG C; (3) in an inert environment, adding tetra-isopropyltitanate to alcohol dehydratum, and then adding a stabilizing agent, a mixed liquor of alcohol dehydratum, acid and deionized water and a wetting agent; (4) dipping the textile into sol, drying, removing residual sol on the surface of the material and then drying again; (5) treating the dried textile in boiled water, pre-drying at 40-50 DEG C, dipping the textile into a gold chloride solution and irradiating under a quasimolecule ultraviolet light source to obtain a compound air purified textile. The method is simple and has low cost, no secondary pollution, and easy industrial production, and the obtained flexible air purified material has good air purification effect.

The invention discloses a method for green synthesis of nano-gold by using a water extract of eucommia ulmoides. The method comprises the following steps: cleaning the eucommia ulmoides, drying at 60 DEG C, and crushing the dried eucommia ulmoides into powder; weighing 20mg of eucommia ulmoides powder and putting into a flask, adding 100mg of water, putting into a water bath pot at the constant temperature of 80 DEG C, treating for 30 minutes, and filtering; carrying out centrifugal separation on the obtained solution at a high speed to obtain a water extract of eucommia ulmoides; uniformly mixing a gold chloride solution and the water extract of eucommia ulmoides, putting the mixture in the water bath pot at constant temperature to react, and thus obtaining nano-gold particles. The method disclosed by the invention has the beneficial effects that the method for preparing nano-gold by using a plant water extract as a reducing agent and protecting agent in a liquid phase under mild conditions is provided and has no damage to the environment and the human body.

The invention discloses a method for preparing gold nanometer spherical shells with polydopamine as a template. Tris hydrochloric acid buffer liquid with pH of 8.5 is mainly used as solvent for preparing dopamine hydrochloride solution with a concentration of 0.5 mg/mL; the dopamine hydrochloride solution is ultrasonically treated after sunshade magnetic stirring under the condition of 15-25 DEG C; then, supernate is taken after centrifugation, and is centrifuged to take precipitates; after the precipitates are centrifugally cleaned by de-ionized water, the precipitates are suspended in hydrochloric acid solution with pH of 2 to prepare polydopamine solution; the polydopamine solution is added in isovolumetric gold chloride solution, and is put in an oscillator for incubation by 0.5-1.5 hat 25 DEG C under 100-200 rpm; ascorbic acid solution with a concentration of 20-60 mM is added in the incubated solution for reduction; the reaction temperature is 15-25 DEG C; the reaction time is 5-10 min; and the gold nanometer spherical shells with uniform particle sizes and excellent monodispersity are prepared. The method has the advantages of mild reaction conditions, simple preparation process, high yield, small particle sizes, excellent monodispersity, excellent photothermal conversion performance and the like.

The compound metal electrothermal film sol is prepared with nanometer level tin powder 8-20 weight portions, antimony trichloride 4-10 weight portions, stannous chloride 1-4 weight portions, gold chloride 0.01-0.1 weight portions, germanium tetrachloride 0.01-0.1 weight portions, silver chloride 0.8-2 weight portions, nickel chloride 0.1-1 weight portions, copper chloride or zinc chloride 2-7 weight portions, sodium chloride or potassium chloride 2-7 weight portions, deionized water 24-60 weight portions and ethanol 99.2-312 weight portions. The sol may be prepared into electrothermal film with high electricity-to-heat conversion efficiency, and other advantages. The present invention also discloses the method of making electrothermal pipe with the sol, and the making process is simple and practical and has less environmental pollution.

The invention discloses a ketone synthesis method through alkyne hydrolysis. The method comprises the following steps: adding alkyne, a catalyst [(IPr)AuCl], a solvent methanol, and water into a reactor, carrying out reactions for several hours at a temperature of 110 to 120 DEG C, cooling to the room temperature, carrying out rotary evaporation to remove the solvent, and performing column separation to obtain target compounds. Compared with conventional ionic gold catalyst, the provided method directly uses gold chloride [(IPr)AuCl] as the catalyst, alkyne is hydrolyzed into ketone, the yield is high, the selectivity is complete, and thus the method has an important meaning for organic synthesis and environment protection.

The invention discloses a pink crystal bead embryo and a preparation method of the pink crystal bead embryo. The pink crystal bead embryo is prepared from the following components in parts by weight: 95-165 parts of quartz sand, 9-17 parts of zinc oxide, 26-48 parts of pure alkali, 18-30 parts of potassium carbonate, 8-15 parts of boric acid, 2.5-5.5 parts of calcium carbonate, 1-3 parts of aluminum hydroxide, 1-2 parts of salts, 15-27 parts of potassium nitrate, 0.008-0.015 part of gold chloride, 0.001-0.003 part of silver nitrate, 1.5-3.5 parts of antimonous oxide and 1-5 parts of cerium oxide. A compound of expensive rare earth erbium is not used during preparation of the pink crystal bead embryo, so that the production cost is greatly reduced; the adsorption wavelength of golden glass is adjusted by using the silver nitrate, beautiful pink cover is displayed, and zinc oxide is used as a protective colloid; because lead raw materials are not used, the pink crystal bead embryo has the advantages of high lustrousness, bright color, orderliness, high yield and good production benefit, and is free of color difference, flower patterns, lead and pollution.

The invention discloses water-soluble porphyrin gold (III) anticancer compounds and a preparation method thereof, and belongs to the technical field of medicine preparation. The preparation method comprises the following steps of: reacting pyridyl, acyl, nitro and sulfo tetraphenyl porphyrin compounds are reacted with potassium chloroaurate to synthesize porphyrin gold chloride, and generating various salts to obtain a class of novel water-soluble porphyrin gold (III) compounds. In vitro S108 cell detection data proves that the compounds synthesized by the method have higher inhibition effect and have the inhibition rate of 71.133 percent. The method is scientific and reasonable; the prepared product has good water solubility and better anticancer activity; and the preparation process is simple and practicable and suitable for industrial production.

The invention relates to nanometer gold grain dispersion nickel oxide compound optical thin film manufacturing method. It uses sol-gel method to make Aux/Ni(1-x)O compound optical thin film of which x expresses Au mass percent, is more than 0 and not more than 0.9. The material is gold chloride acid and nickel nitrate of which concentration is between 0.1mol/L and 1mol/L. The solvent is ethylene glycol monoemethyl ether. The invention has the advantages of easy controllable metering component, simple technology, low price, 200-700 deg.C reaction temperature, short manufacture period, saving energy resources. The prepared product has good nonlinear optical performance, can observe absorption peak in given wave length, separate from optical switch, optical computer, light wave.