307 results about "Cupric sulfide" patented technology

A system and methodology are disclosed for forming a passive layer on a conductive layer, such as can be done during fabrication of an organic memory cell, which generally mitigates drawbacks inherent in conventional inorganic memory devices. The passive layer includes a conductivity facilitating compound, such as copper sulfide (Cu₂S), which is generated from an upper portion of a conductive material. The conductive material can serve as a bottom electrode in the memory cell, and the upper portion of the conductive material can be transformed into the passive layer via treatment with a plasma generated from fluorine (F) based gases.

A technology for recovering the pickel sulfide-copper sulfide tailings includes water collection of said tailings sand, preparing slurry, three-segment separating, dewatering, grinding, adding the separating chemicals consisting of capture, activator, foamer, regulator and depressent, floatation, and magnetic separating. Its advantages are high productivity and recovery rate, and no secondary pollution.

The invention discloses a floating method for finely disseminated copper sulfide ores. The floating method specifically comprises steps such as ore grinding, roughing, roughed concentrate re-grinding, roughed concentrate copper-sulfur separating and floating and roughened tailing scavenging, wherein multi-time concentrating and multi-time scavenging are performed on roughened concentrate and roughened tailings, cyclic ore dressing is performed on ores, and different ore dressing reagents are matched, so that the recovery rate of raw ores is increased. The floating method has the advantages that: by optimizing an ore grinding process and reasonably adding a collecting agent and a collecting-foaming agent, surface characteristics of ores are improved, selective adsorption, on copper sulfide ore particle surfaces such as fine-grained copper pyrite and chalcocite, of the collecting agent is strengthened, and hydrophobic agglomeration is formed, so that the recovery rate of copper concentrate is increased by 3-6% in comparison with that of an existing ore dressing method.

The invention relates to a beneficiation method for copper sulfide ore containing easily-sliming gangue minerals. According to the method, lime is adopted as pH regulator and pyrite depressant of flotation pulp of the copper sulfide ore containing the easily-sliming gangue minerals; sodium sulfide serves as activator of a small number of copper oxide minerals in the ore; sodium hexametaphosphate, sodium silicate or ethylenediamine serves as gangue slurry dispersant; a combination of butyl xanthate and other collectors serves as a collector of copper sulfide minerals; terpernic oil serves as foaming agent. The ore is subjected to primary grinding, primary roughing, primary scavenging and three-time concentration; the ore pulp is subjected to strong stirring and pulp mixing before starting to be subjected to primary roughing, primary scavenging and primary concentration, so that copper contained in the ore is efficiently recovered. According to the method, through reasonable combination and addition of chemicals, the ore grinding and pulp mixing process is strengthened, the adverse influence of gangue slurry on copper sulfide mineral floatation is eliminated, the surface characteristics of copper sulfide minerals are improved, the preferential adsorption of the collector on the surfaces of the copper sulfide minerals is enhanced, and accordingly, compared with a conventional method, the copper grade and the copper recovery rate of copper concentrate are substantially increased.

A hydrogen sulfide sensor is made from a metal acetate film, such as a thin film of copper acetate, formed on a set of monitoring electrodes, by evaporation of a metal acetate aqueous solution disposed on the electrodes, for detecting a weak gas, such as hydrogen sulfide, carried in a gas carrier, such as a nitrogen carrier, for detecting low concentration of the weak gas, such as ten ppm, when the conductivity of the film changes by several orders of magnitude, that produces a metal sulfide, such as copper sulfide, that is a good electrical conductor at room temperature, for example, as the metal acetate is converted directly to a metal sulfide upon exposure to hydrogen sulfide.

The invention relates to a method for the preparation of CuS hollow balls in the field of inorganic materials and functional materials processing. First, a certain amount of soluble cupric salt and PVP are dissolved in the water for form clear solution, which is then added in with a certain amount of reductant to produce yellow suspending solution, and then added in with a certain amount of S source substance, reacting at the temperature of 10-90 degree for 10min to 24h to produce CuS hollow balls. The invention is characterized in soft preparation conditions, simple processing, low cost, high yield etc., which is good for industrialization production and the produced product is characterized in good dispersibility, uniform wall thickness, superior performances to the present products and wide application foreground.

An object of the present invention is to provide a method of efficiently leaching copper from a copper sulfide ore containing chalcopyrite or enargite as a main constituent under versatile conditions for actual operation.

A method of leaching copper from a copper sulfide ore, characterized by comprising using, as a leaching solution, a sulfuric acid solution containing iodide ions and ferric (III) ions in an excessive amount relative to the iodide ions and leaching copper from a copper sulfide ore; or a method of leaching copper from a copper sulfide ore, characterized by comprising leaching copper from a copper sulfide ore with the use of a leaching solution further containing water-soluble ligands such as chloride ions that can stabilize ferric (III) ions in addition to the above components, is provided.

The invention discloses a combined collector for floatation of a porphyry copper-molybdenum mine and a floatation method thereof. The combined collector is characterized by at least comprising phthalate and carboalkoxy (aryloxy)-thiourea. The combined collector is used in a process of the floatation of the porphyry copper-molybdenum mine and the method comprises the following steps of: performing the floatation on molybdenum, copper and the like in which the molybdenum is as a majority; floating molybdenite and part of copper sulfide minerals with high floatability so as to obtain a molybdenum and copper mixed concentrate with high a molybdenum recovery rate; and enhancing the recovery of the copper sulfide minerals with poor floatability. Due to the adoption of the combined collector and the method, the problem of strong inhibiting effect on the molybdenite caused by a high-alkali environment of lime in a conventional mixed floatation process of the porphyry copper-molybdenum mine is solved effectively; and the method has the characteristics of simple and reasonable flow, high molybdenum recovery rate and the like.

The invention discloses a method for preparing a thin-film solar photovoltaic cell with a copper indium gallium selenide (CIGS) nano wire array structure. The method comprises the following steps of: growing a large-area cuprous sulfide or copper sulfide nano wire array by adopting a gas-solid reaction method, and converting the cuprous sulfide or copper sulfide nano wire array into a CIGS nano wire array by physical vapor deposition and heat treatment methods. The component, the phase structure and the energy band structure of the semiconductor nano wire array can be regulated by controlling the categories of deposition elements, the deposition sequence, the deposition process, post treatment and the like, so that solar photovoltaic cells with different structures and properties are prepared. Through the cell, light reflection is reduced, light absorption is increased, the probability of producing current carriers can be increased, the probability of recombination of holes and electrons is reduced, and the photoelectric conversion efficiency is greatly improved. The method is low in cost, the preparation processes are controllable, the prepared nano wire array is uniform in structure distribution, and preparation of the nano structural thin-film solar photovoltaic cell with large area and high photoelectric conversion efficiency can be realized.

The invention discloses a preparation method of a molybdenum disulfide/copper sulfide/cuprous oxide nano-composite material. The preparation method comprises the steps of adding copper oxide into deionized water, stirring to form a mixture, adding sodium molybdate dihydrate, thiourea and CTAB, maintaining the temperature of a sample at a hydrothermal temperature of 220 DEG C for 24 hours, washing a product for five times by virtue of deionized water and ethanol, putting the product into a vacuum drying oven, and drying at a temperature of 60 DEG C, so as to obtain the molybdenum disulfide/copper sulfide/cuprous oxide nano-composite material. The molybdenum disulfide/copper sulfide/cuprous oxide nano-composite material prepared by virtue of a hydrothermal method has the characteristics of simple preparation process, good material crystallinity, high sample uniformity and the like. A formed nano-composite structure has semiconductor heterojunction features and is capable of inhibiting the compounding of light-generated electrons and holes and promoting the separation of the electrons and the holes, so that the nano-composite material has wide application prospects in the fields of photocatalysis and photovoltaic cells.

The invention discloses a copper sulfide ore flotation collector as well as a preparation method and application thereof. The collector is alkoxy carbonyl alkyl dithiocarbamate and has a structural formula as shown in the specification, wherein R1 is carbon chain 1-4 alkyl and R2 is carbon chain 2-4 alkyl. The preparation method comprises the following steps: performing nucleophilic substitution reaction on alkylamine, sodium hydroxide and carbon bisulfide to obtain sodium dithiocarbamate; reacting the sodium dithiocarbamate and alkyl chloroformate to obtain a target collector alkoxy carbonyl alkyl dithiocarbamate. The application refers to application of the copper sulfide ore flotation collector in performing flotation on copper sulfide ore and recycling valuable metal minerals in the copper sulfide ore. The collector is capable of realizing effective separation of the copper sulfide ore and pyrite under an ore pulp environment with the pH value of 6-10, reducing the lime consumption, and further effectively recycling useful metals such as gold, silver and molybdenum. Compared with the existing collector, the collector has the advantages of good selectivity and high useful metal recovery rate.

The invention discloses a perovskite solar cell based on a Spiro-OMeTAD/CuxS composite hole transport layer and a preparation method thereof. The solar cell comprises a transparent conductive substrate, an oxide electron transport layer, a perovskite light absorption layer, a composite hole transport layer, and metal electrodes. The composite hole transport layer is obtained by the following steps: spin-coating a perovskite light absorption layer with a Spiro-OMeTAD layer, and depositing high-purity copper sulfide powder on the Spiro-OMeTAD layer through vacuum thermal evaporation to get a composite hole transport layer composed of a p-type CuxS film and a Spiro-OMeTAD layer, wherein 1<=x<=2. The hole carrier mobility of the composite hole transport layer can be up to 0.1cm<2>V.s<-1>, the composite hole transport layer is very hydrophobic, the contact angle is up to 92 degrees, and the water stability of devices is greatly improved. By employing the composite hole transport layer, the photoelectric conversion efficiency of planar perovskite film cells can be up to 14%, and the attenuation of devices after 1000-hour use is less than 10%, which are better than those of devices employing a Spiro-OMeTAD or CuxS hole transport layer alone.

The invention relates to a method for preparing intelligent temperature regulation fiber by a melt spinning process. The method comprises the following steps of: (1) preparing a ternary composite phase change medium from grapheme, copper sulfide and polyethylene glycol by a blending process; or preparing a ternary composite phase change medium from grapheme, copper sulfide and polyethylene glycol acrylate by a three-dimensional network process; and (2) preparing a spinning-level slice from the ternary composite phase change medium and a polymer matrix by blending, drying, and finally spinning to obtain intelligent temperature regulation fiber by a melt spinning process. The method provided by the invention is simple to operate; and the intelligent temperature regulation fiber can absorb far and near-infrared light and visible light, and has the characteristics of fast response and high efficiency as well as broad application prospects.

The invention relates to a floatation depressant for obtaining molybdenum concentrate and copper concentrate by mineral separation, particularly by separation of copper-molybdenum mixed concentrate, and methods for preparing and using the floatation depressant. The floatation depressant is characterized by being an organic liquid agent obtained through chemical reaction by using mercaptoacetic acid, gallic acid and sodium hydroxide as raw materials. The floatation depressant is the organic liquid agent obtained through the chemical reaction of pyrogallic acid, the mercaptoacetic acid and the sodium hydroxide, and can be used for effectively depressing primary and secondary copper sulfide ores such as copper pyrite and chalcocite, and the copper-molybdenum mixed concentrate can be effectively separated. The defects of large usage of common sodium sulfide, severe operation environment and serious pollution are overcome, and the floatation depressant has the advantages of convenience in addition, safety in use and the like. An effective method which is small in agent usage, convenient to use and low in environmental pollution is provided for the separation of molybdenum copper sulfide mixed concentrate.

A method for manufacturing the memory device by plasma decomposition of sulfur dioxide. A first copper electrode having a surface is provided. The surface of the first copper electrode may be made amorphous. A copper sulfide layer, Cu_xS, where 1≦x≦2, is disposed on the copper surface by decomposing sulfur dioxide in an ambient containing excess hydrogen. The copper sulfide layer may be is cuprous sulfide or cupric sulfide. A second copper electrode is coupled to the copper sulfide layer.

The invention discloses a chemical and biological combining push soak craft of middle grade thermophile and low-grade primary cupric sulfide ore, which comprises the following steps: utilizing diluted sulfate liquor with Fe2+ ion; pre-processing low-grade primary cupric sulfide ore; choosing domestic middle grade thermophile (Sulfobacillus thermosulfidooxidans Retech-MTC-1) with reinforced sulfur oxidability; leaching primary cupric sulfide ore; reclaiming the copper; extracting leachate in pretreating step; entering organic phase into downstream back extraction process; extracting eligible leachate in middle grade thermophile step; backing the water phase to soaking pile; merging organic phase and the organic phase in pretreating step; entering into downstream back extraction process. This craft possesses short flow process, simple device, low coat and high reclaiming ratio, which can increase the reclaiming ratio of copper.

The invention relates to a method for fusing enriched precious metal from a spent automotive catalyst. The method takes copper sulfide ore as a capturing agent and comprises the following main procedures: (1) grinding: grinding the spent automotive catalyst to obtain powder with the particle size of 30-200 mesh; (2) mixing: uniformly mixing the ground spent automotive catalyst with the capturing agent, a fusing agent and other auxiliary materials; (3) fusing: loading the uniformly mixed materials into a graphite crucible, and fusing in a high-temperature electric resistance furnace; (4) phase separation: separating two phases after fusing so as to obtain the copper and matte phase with more than 98.5% enriched precious metal and the slag phase with less than 3g/t precious metal. With adoption of the method, the operation procedure is efficiently reduced, the production cost is lowered, and the better environmentally-friendly effect is achieved.

The invention relates to a chalcocite-contained coarse-grain disseminated copper sulfide ore step-by-step ore grinding flotation method. According to the chalcocite-contained coarse-grain disseminatedcopper sulfide ore step-by-step ore grinding flotation method, raw ores are subjected to ore grinding and then are graded into two kinds of ore pulp, namely, overflow d and setting sand c to form twoloops to be subjected to flash flotation and conventional flotation correspondingly; during one loop of flash flotation, a high-selectivity collecting agent (2) and a foaming agent (3) are added to the setting sand c ore pulp fed into a single-tank flash flotation machine to be subjected to optimized flotation to obtain a copper concentrate product 1 and flash flotation tailings f; the concentrate grade and the recovery rate of the copper concentrate product 1 can be ensured, ore feeding fluctuation of conventional flotation can be reduced, the stability of the preparation process is improved, and valuable minerals in ores can be recovered as early as possible; during the other loop of conventional flotation, calcium oxide (1), a high-collectivity collecting agent (4) and the foaming agent (3) are added to the overflow d ore pulp to be subjected to stirring and conventional flotation to enable valuable metals such as gold, silver and copper in the overflow d to be enriched into copperconcentrate 2h and remove tailings 1. The chalcocite-contained coarse-grain disseminated copper sulfide ore step-by-step ore grinding flotation method has the advantages of being simple in operation,smooth in process, easy to apply industrially, high in recovery rate, low in production cost, good in comprehensive benefit and the like and is particularly suitable for mineral separation of chalcocite-contained coarse-grain disseminated copper sulfide ores.

The present invention relates to wet metallurgical technology, and is especially leaching process of complicated cupric sulfide aurin ore. The process includes stirring leaching ore slurry under normal pressure oxidizing condition, extraction, cyanidation-zinc powder displacement to recover Au, Ag and Cu, and floating to enrich and hot filtering to recover sulfur. In the stirring leaching step, one or several of ferric nitrate, ferric sulfate, ferric chloride, vanadium oxide, manganese oxide and titanium oxide as catalyst to alter the surface activity of the cupric sulfide is added in the amount of 0.05-1.0 mol/L. The present invention has the features of normal pressure and normal pressure leaching, easy control, low production cost, environment friendship, etc.

The invention provides preparation of a carnation-shaped p-n heterojunction copper sulfide nanometer material, and belongs to the technical field of nanometer materials. The preparation includes the steps that melamine is used as a raw material, carbon-doped graphene carbon nitrogen C-g-C3N4(CCN) is synthesized through hydro-thermal treatment and high-temperature calcination, and the carbon-doped graphene carbon nitrogen, copper chloride dihydrate and thiourea are further subjected to a hydrothermal reaction to synthesize a CCN-CuS p-n heterojunction; the p-n heterostructure reduces charge transfer resistance, enables photoinduced charges to be effectively separated and can effectively improve activity of photocatalyst. It is indicated through experiments that the prepared CCN-CuS p-n heterojunction nanometer material shows excellent visible-light catalytic activity and good cycling stability, and the degradation rate of rhodamin B can reach 92.6%. Therefore, the nanometer material can be used for degradation treatment on organic dyestuff waste water.

The inventiondiscloses an application of a photothermal-conversion cupric sulfidecomposite film in water treatment. The photothermal-conversion cupric sulfidecomposite film is applied to sea water desalination or sewage treatment and is characterized in that defective type cupric sulfide nanoparticles capable of performing solar photothermal conversion grow on the surface of a black spongy porouspolyethylene film. The composite film is used for manufacturing a device by combining an independent hydrophilic film and a photothermal-conversion material, has a porous surface, is highly hydrophilic and can float on the surface of water, and therefore, under cooperation with the solar photothermal conversion performance of the cupric sulfide nanoparticles on the surface of the film, the composite film can be applied to the evaporation process of water in the nature, greatly improves solar evaporation efficiency of water, can be widely applied to the sewage treatment, the sea water desalination, water circulation and the like and facilitates realization of effective energy utilization and environmental protection.