24 results about "Arsine" patented technology

The invention belongs to the field of lasers, and discloses a growth method for reducing laser Ith through N grating burying, which subversively adopts an N-type grating structure, uses a built-in P-N junction formed by the N-type grating structure and a subsequent P-type buried layer as a natural and efficient current blocking layer, and structurally eliminates a current leakage path. Afterwards, in the heating stage, trace arsine is introduced to carry out atomic-scale protection on the sensitive grating morphology, at the optimal mass transport temperature, the high mobility characteristic of indium atoms is utilized to carry out shape-preserving filling on grating grooves, flawless preliminary planarization is achieved, and through variable-temperature thickening growth and high-temperature annealing in the pure phosphorus atmosphere, the high-temperature-resistant grating is obtained. And performing quality optimization and defect repair on the buried layer and the key interface. The series of linked steps ensure that the indium phosphide buried layer with flat atomic scale and complete crystal lattice can grow on the fragile N-type grating, and ensure that a high-quality covering layer and an active region grow on the N-type grating.

The invention relates to the technical field of semiconductors, in particular to an InGaAs / InP heterogeneous material epitaxial growth method, which comprises the following steps of: opening a phosphorane source and a trimethyl indium source to grow a first InP epitaxial layer on a preset substrate; turning off the trimethyl indium source, starting timing, and turning off the phosphine source if the timing duration reaches a first preset duration; opening an arsine source, a trimethyl indium source and a trimethyl gallium source to grow an InGaAs epitaxial layer on the first InP epitaxial layer at a growth rate as a first rate; the flow of the arsine source, the flow of the trimethyl indium source and the flow of the trimethyl gallium source are reduced, the InGaAs epitaxial layer continues to grow, the growth rate is a second rate, and the first rate is larger than the second rate; according to the method, the growth of the InGaAs epitaxial layer can be well realized on the first InP epitaxial layer.

The invention belongs to the technical field of waste resource utilization, and particularly relates to a method for preparing crude arsenic by recycling arsenic-containing hydrogen gas. The method comprises the following steps: in an oxygen-isolated environment, introducing arsenic hydride-containing gas into a sulfuric acid aqueous solution with the mass fraction of 70%-98%, carrying out an oxidation-reduction reaction to obtain slurry containing crude arsenic, and carrying out solid-liquid separation to obtain a crude arsenic product. According to the method, the arsenic hydride gas can be directly converted into the arsenic elementary substance, so that the recovery of arsenic in the arsenic-containing material is realized. Concentrated sulfuric acid can fully oxidize arsenic hydride in a specific concentration range, and the arsenic hydride is prevented from being excessively oxidized into arsenic trioxide. Compared with other acidic or oxidizing solutions, the method has the advantages that the crude arsenic product with the purity larger than or equal to 95% can be directly obtained under the normal-temperature and normal-pressure conditions, the generated by-product dilute sulphuric acid can be circularly used for absorbing arsenic hydride again or used for leaching materials such as zinc arsenate-containing smoke dust to generate new arsenic hydride-containing gas, and therefore a closed-loop circulation process is formed; and efficient resource recovery and environment-friendly treatment are realized. The method is short in technological process, low in equipment requirement and small in energy consumption, the crude arsenic can be used as a precursor for preparing the high-purity arsenic, and a feasible scheme is provided for safety treatment and resource utilization of arsenic hydride in the industrial processes of metallurgy, wet refining and the like.

This invention discloses a high-throughput electrocatalytic preparation apparatus for arsine and its usage method. The apparatus includes an anode electrolytic cell and cathode electrolytic cells on its left and right sides, respectively. Both the anode and cathode electrolytic cells are filled with acidic electrolyte and separated by a proton exchange membrane. The anode catalyst electrode in the anode electrolytic cell is connected to the positive terminal of a DC power supply; the cathode catalyst electrode in the cathode electrolytic cell is connected to the negative terminal of a DC power supply. An isolation valve and a cathode sludge receiving box are located at the lower end of the cathode electrolytic cell. This invention's equipment generates oxygen at the anode and arsine at the cathode through electrolysis. The principle is based on the reduction of elemental arsenic, which combines with hydrogen permeating through the proton exchange membrane to form arsine. This equipment has a simple structure and low cost. The design of dual cathode electrodes and their matching isolation valve and cathode sludge receiving box improves the efficiency of arsine production while reducing its cost, demonstrating significant application potential.

The utility model discloses an arsine purification device, which relates to the technical field of arsine purification devices, and comprises an arsine gas generation reaction kettle, the top end of one side of the arsine gas generation reaction kettle is communicated with a first gas transmission pipe, and the top end of one side of the first gas transmission pipe is communicated with a filtering absorption box; a mounting base plate is fixedly mounted at the bottom end of the interior of the filtering and absorbing box, and an absorbing box is detachably mounted at the top end of one side of the mounting base plate. Materials are added into an arsine gas generation reaction kettle, generation of arsine gas is achieved, and oxygen, water vapor and carbon dioxide exist in the arsine gas, so that the gas is conveyed into a filtering and absorbing box through a first gas conveying pipe; a plurality of groups of adsorption boxes are mounted in the filtering and absorbing box to absorb and remove other foreign gases, and the adsorbed gases are conveyed into an arsine gas reserved storage box through a second gas conveying pipe to be collected and stored.

The utility model discloses a purification device for producing ultrapure arsine, and relates to the technical field of ultrapure arsine purification devices, the purification device comprises an arsine gas generation reaction kettle, the top end of one side of the arsine gas generation reaction kettle is communicated with a first gas transmission pipe, and the top end of one side of the first gas transmission pipe is communicated with a condenser. A material for producing arsine gas is placed in an arsine gas generation reaction kettle, arsine is generated through heating, gas enters a condenser through a first gas transmission pipe, the arsine gas can be cooled, water vapor can be condensed, entangled water vapor can be reduced, and the production efficiency of arsine is improved. Gas enters the first cold trap and the second cold trap to be further treated, through precise distillation in the first rectifying tower and the second rectifying tower, impurities in the gas are finally adsorbed through the adsorption box, ultra-pure gas is generated, and ultra-pure arsine gas can be collected through the gas storage tank.

The utility model provides a production device of electronic-grade hydrogen phosphide. The production device comprises a full-automatic aluminum phosphide feeding system, a sulfuric acid metering tank, a constant-temperature reaction kettle, a purification cooling system, a heavy component removal purification column, a cold trap collection device, a light component removal purification column, a low-temperature filling system, an inert gas purging system, a vacuum system and a tail gas treatment system. The method comprises the following steps: quantitatively adding aluminum phosphide into a constant-temperature reaction kettle, slowly adding sulfuric acid into the constant-temperature reaction kettle through a metering tank, reacting to generate hydrogen phosphide gas, and removing particulate matters, acid mist, moisture, arsenic hydride, hydrogen sulfide, carbon dioxide, carbon monoxide, alkane, silane and ethylene in the hydrogen phosphide gas through pre-cooling, deep cooling, heavy component removal, cold trap and light component removal to obtain the electronic-grade hydrogen phosphide special gas with the purity of 99.9999%. And feeding tail gas generated in the purification process into a tail gas treatment system, absorbing the tail gas through a two-stage tower, and discharging the tail gas after reaching the standard.

This utility model relates to an ultra-trace gas detection device in silane gas, comprising a gas concentrator, a gas chromatograph, and a liquid nitrogen tank. The gas concentrator is connected to a main gas pipe, which is connected to five branch pipes: a helium pipe, a first standard gas pipe, a second standard gas pipe, a sample inlet pipe, and a first tail gas pipe. The gas chromatograph is equipped with a PDD detector and is connected to a first carrier gas pipe and a second tail gas pipe. A second carrier gas pipe and a sample pipe are connected between the gas concentrator and the gas chromatograph. A liquid nitrogen inlet pipe is connected between the gas concentrator and the liquid nitrogen tank. This utility model's ultra-trace gas detection device in silane gas has a novel structure and reasonable design, and can analyze phosphine, arsine, and hydrogen sulfide in silane gas at concentrations below 10 pptv. It features safety, high efficiency, stability, and high sensitivity.

This invention provides a method for the co-reduction synthesis of zinc arsenide in an alkaline composite environment. The method innovatively uses a strongly alkaline solution as the basic electrolyte and simultaneously dissolves zinc oxide (ZnO) and arsenic trisulfide (As₂S₃) as the zinc and arsenic sources, respectively, to form Zn(OH)₄. 2‑ and AsS3 3‑ / AsO3 3‑ A multi-ion coexistence system was developed. By introducing multifunctional composite additives into this system, the electrodeposition process was synergistically regulated. Specifically, the reduction process of Zn(II) in situ modified the cathode interface, reducing the double-layer thickness and enhancing the adsorption and electron transfer of arsenite ions on the cathode surface. Simultaneously, the coupled co-deposition of arsenic and zinc effectively squeezed out the adsorption sites of water molecules on the cathode surface and the electron ratio of the hydrogen evolution reaction, thereby significantly suppressing the hydrogen evolution side reaction and the generation of highly toxic arsine (AsH3) gas. Ultimately, a uniform and well-bonded zinc arsenide deposition layer was obtained on the cathode surface.

A real-time monitoring system and method for inhibiting the evolution of arsine in a copper electrowinning arsenic removal process. The system comprises a PLC control module (1), a primary mother solution real-time monitoring module (2), an arsenic removal circulating solution real-time monitoring module (3), a arsenic removal post-solution real-time monitoring module (4) and a precise regulation and control module (5). By means of using copper-arsenic electrodeposition and concentration competition difference and using a arsenic removal circulating solution copper-arsenic concentration difference and limit value as constraint indicators, the PLC control module (1) controls the monitoring modules to acquire in real time the copper-arsenic concentrations in a primary mother solution, in a arsenic removal circulating solution and in a arsenic removal post-solution, calculates and analyzes a requirement for the copper-arsenic ion concentration in the arsenic removal circulating solution, and precisely regulates and controls the amount of a high-concentration copper-arsenic solution added to the primary mother solution so as to ensure that, after the arsenic removal circulating solution is periodically returned, the copper-arsenic ion concentration in the arsenic removal circulating solution is always in the optimal electrowinning arsenic removal range, improving arsenic deposition and reducing copper deposition, inhibiting the evolution of highly toxic gas arsine, precisely regulating and controlling arsenic removal post-solution diversion, and meeting enterprise safety production requirements while achieving efficient arsenic removal.

The present invention relates to a process for removing arsine from a hydrocarbon mixture having 2 to 4 carbon atoms. The process comprises contacting the hydrocarbon mixture having 2 to 4 carbon atoms with a sorbent, wherein the sorbent is a metal organic framework (MOF) comprising: a) at least 1 transition metal selected from the group consisting of a Group 1B metal, a Group 2B metal and a Group 4B metal, and b) an organic ligand selected from a di-carboxylic acid compound or a tri-carboxylic acid compound, and wherein the sorbent is subjected to an alcohol treatment.

A real-time monitoring system and method for inhibiting arsine evolution in electrodeposition de-arsenic process of copper electrowinning is provided. The system includes a PLC control module, a primary mother liquor real-time monitoring module, an de-arsenication circulating solution real-time monitoring module, a de-arsenicated solution real-time monitoring module, and an accurate regulation module. The present invention utilizes copper-arsenic electrowinning and concentration competition differences, with the difference and limit of copper arsenic concentration in the de-arsenication circulating liquid as the constraint indexs, and the PLC control module is configured to control monitoring modules to acquire copper and arsenic concentrations in a primary mother liquor, an de-arsenication circulating solution and a de-arsenicated solution in real time, to calculate and analyze required copper and arsenic ion concentrations in the de-arsenication circulating solution, and to accurately regulate dosage volume of the primary mother liquor with high copper and arsenic concentrations.

The application discloses a method for electrocatalytic preparation of arsine by taking grey arsenic as an arsenic source, and the method comprises the following steps: taking a PdFe bimetallic alloy nanoparticle electrode loaded on a nickel foil as a working cathode, setting an anode as a counter electrode, taking grey arsenic as an arsenic source, catalytically reducing the grey arsenic in an alkaline electrolyte by a constant current electrolysis method, and obtaining arsine. In a wide current density range, the method can realize efficient synthesis of arsine, and the method takes common and easily obtained grey arsenic as the arsenic source, takes a PdFe / NF electrode prepared by electrodepositing in a simple manner as a catalytic working cathode, and has mild reaction conditions, and the method does not need high temperature and high pressure and a chemical reducing agent, and the electrocatalyst can be repeatedly used, so that the method provides a green, safe and efficient method for synthesis of arsine.

This invention relates to the field of gas adsorbents, specifically to an adsorbent for alkane gases used in semiconductor manufacturing processes and its preparation method. The adsorbent comprises the following raw materials: 50-65 parts activated manganese dioxide, 40-50 parts modified activated carbon, 27-32 parts activated copper oxide, 105-110 parts potassium permanganate aqueous solution, 0.2-0.6 parts lubricant, 0.01-0.03 parts manganese nitrate, and 1-4 parts silica. By controlling the amounts of modified activated carbon, activated manganese dioxide, activated copper oxide, and potassium permanganate, this invention enables the prepared adsorbent to exhibit high adsorption and decomposition capacity for silane, phosphine, and arsine waste gases, with a large adsorption capacity and excellent long-lasting effect.

The utility model relates to the technical field of blood arsenic detection, and discloses a blood arsenic content colorimetric detection device which comprises a reaction bottle. According to the colorimetric detection device for the arsenic content in the blood, through the arrangement of the reaction bottle, the air supply pipe, the mercury bromide test paper and the colorimetric card, after blood is faded to be colorless and transparent from red by utilizing a form of proteolysis hemoglobin in the reaction bottle, tartaric acid is added into the reaction bottle; under the action of tartaric acid, colorless blood is combined with hydrogen in a reaction bottle gas production sheet to form gaseous arsenic hydride, the arsenic hydride is sprayed to mercury bromide test paper through a gas supply pipe, the mercury bromide test paper generates color spots, and the color spots are compared with the color on a colorimetric card, so that the concentration of the arsenic content in the blood is obtained. The arsenic detection kit is simple in structure, suitable for field detection and basic medical institutions, capable of detecting low-concentration arsenic and meeting clinical detection requirements, short in detection time and capable of obtaining detection results in a short time.

This application discloses a detachable electrocatalytic apparatus for the preparation of arsine and its application. The apparatus includes an electrolytic cell containing an anode electrode and a detachable cathode bag. The lower end and four sides of the detachable cathode bag are completely enclosed. The upper end of the detachable cathode bag has an exhaust port and a detachable proton exchange membrane, which is horizontally positioned and submerged below the electrolyte surface in the electrolytic cell. The detachable cathode bag contains a cathode electrode, which is connected to a power source via wires, along with the anode electrode. The exhaust port of the detachable cathode bag is connected to a cathode gas collector via a pipeline through a cathode pump. In this apparatus, the anode undergoes an oxygen evolution reaction, and the open-type electrolytic cell reduces equipment production costs. Simultaneously, the cathode undergoes an arsenic reduction reaction, which can be used for the preparation of arsine. Furthermore, the detachable cathode allows for easy cleaning of cathode sludge, enabling efficient and safe production of arsine and demonstrating significant application potential.

The invention discloses a method for separating and recovering valuable metals from yellow slag, which comprises the following steps: preparing the yellow slag containing iron-arsenic-copper alloy into an anode, and performing electrochemical dissolution by using the anode to obtain anode slime and enriched iron electrolyte; sequentially sulfating, roasting and leaching the anode slime to obtain a leaching solution and leaching residues, and separating and recycling valuable metals in the leaching solution and the leaching residues through post-treatment; the mass of sulfuric acid used for sulfating is 35-60% of the mass of the anode mud. The invention provides a method for effectively separating valuable metals such as iron, copper, germanium and the like aiming at the problem that the yellow slag of the iron-arsenic-containing copper alloy is difficult to treat, the content of iron in the material can be effectively reduced through sulfating and roasting, the consumption of heavy acid in the subsequent treatment process is reduced, meanwhile, the risk of generating arsine by direct acid leaching is avoided, and the method is safer, more environmentally friendly and higher in economic benefit. And the separation effect of each valuable metal is good.

This invention discloses a pre-arsenic removal and arsenic recovery system and process for arsenic-containing gold concentrate based on a steel belt furnace, belonging to the field of arsenic-containing mineral resource processing technology. The system includes a raw material processing unit, an arsenic removal unit, a flue gas treatment unit, and a product collection unit, with its core equipment being a sealed, slightly negative-pressure steel belt furnace. The process involves evenly spreading the arsenic-containing gold concentrate onto the conveyor belt of the steel belt furnace using a feeding device, completing the pre-arsenic removal reaction at a temperature of 580-650℃ under slightly negative pressure conditions, and obtaining low-arsenic gold concentrate after cooling. The generated arsenic-containing flue gas is treated through secondary combustion of natural gas, pipeline crystallization, and baghouse dust collection to recover arsenic trioxide. The tail gas is treated by an absorption tower before being discharged in compliance with standards. This invention can remove arsenic from gold concentrate with an arsenic content of 10-15% to below 0.5%, with a unit processing cost of only 700 yuan / ton. It effectively solves the technical problems of difficult removal of sulfur arsine and easy pipeline blockage in existing technologies, combining high efficiency, environmental friendliness, and economy.

The invention relates to a novel organic arsine compound Z2-A-Z2 and an application of the novel organic arsine compound Z2-A-Z2 in tumor resistance. The organic arsine compound Z2-A-Z2 disclosed by the invention not only shows remarkable anti-DLBCL activity in an in-vitro experiment, but also can effectively induce tumor cell apoptosis; in an animal model, the compound also shows a good anti-tumor effect, has no obvious toxic or side effect and has an important clinical application value. As an epigenetic regulating agent, Z2-A-Z2 not only shows good anti-tumor activity to DLBCL, but also has the characteristics of low toxicity and high selectivity, and has clinical transformation potential. Besides, Z2-A-Z2 can also be applied to other malignant tumors (such as multiple myeloma and T cell lymphoma) depending on an epigenetic mechanism, or can be combined with existing targeted drugs and immunotherapy, so that the comprehensive curative effect of tumor treatment is improved.

The invention belongs to the technical field of chemical synthesis equipment, and particularly discloses arsine synthesis reaction equipment with a real-time leakage monitoring function, which comprises a synthesis reaction mechanism, a monitoring mechanism and a calibration mechanism, the synthesis reaction mechanism comprises a kettle body, the top of the kettle body is covered with a sealing cover, the top of the sealing cover is fixedly connected with a servo motor, a stirring frame is rotationally connected into the kettle body, a rotating shaft of the servo motor penetrates through the sealing cover and is in key connection with the stirring frame, and the bottom of the kettle body is fixedly communicated with an electric discharging valve. According to the arsine synthesis reaction equipment, the real-time monitoring unit is arranged, arsine gas leakage of the arsine synthesis reaction equipment can be found more accurately and timely, and when leakage occurs at the position, where arsine gas leakage occurs most easily, on the arsine synthesis reaction equipment, the leaked arsine gas can be prevented from being exposed in air to pollute the working environment.

A measurement device can be used to identify concentrations of arsenic species in a water sample. The measurement device can take the form of a test strip that includes a substrate having at least one test region that contains an amount of test media. The silver reagent includes a polymeric framework and a silver component that is stabilized by the framework but still has sufficient activity to act as a colorimetric sensor for arsenic, for example, ((Ag(H2btc))(Ag2(Hbtc))) n The test media, which is initially substantially colorless, exhibits a color change response upon exposure to an arsenic species (e.g., arsine) that is produced by a sample containing as little as 5 ppb arsenic, with the color becoming increasingly darker as the concentration of arsenic increases. Test strips made with silver coordination polymers show robust stability to light and water, allowing for replacement of mercury-based field test kits in true field testing conditions under direct sunlight and high humidity conditions.

This invention proposes an online monitoring method for total arsenic in water, comprising the following steps: mixing a water sample with a potassium persulfate aqueous solution and heating to digest it, oxidizing all forms of arsenic to pentavalent arsenic; adding sulfuric acid and tartaric acid to the digestion solution to adjust the pH to 12, and adding ascorbic acid and potassium iodide to complex copper ions, adding potassium borohydride to generate arsine, and purging with air to remove the arsine; introducing the arsine into an iodine and potassium iodide aqueous solution to oxidize it to arsenate, then adding ammonium molybdate to generate arsine molybdenum heteropolyacid, and again adding ascorbic acid and potassium iodide to reduce it to molybdenum blue; measuring the absorbance and plotting a standard curve to calculate the total arsenic content. By using an iodine-potassium iodide solution as the arsine absorption solution, the absorption efficiency and stability are superior to conventional acidic potassium permanganate solution; simultaneously, tartaric acid masks antimony ions, and ascorbic acid and potassium iodide synergistically complex copper ions, effectively eliminating Sb. 3+ / Cu 2+ Interference can be eliminated to achieve accurate online monitoring of total arsenic in water.

The invention provides a method for efficiently enriching indium in indium-containing zinc hypoxide smoke dust, and relates to the technical field of hydrometallurgy. The method comprises the following steps: neutral leaching: mixing indium-containing zinc hypoxide smoke dust with a first acid solution, and carrying out neutral leaching to obtain neutral leaching residues and a neutral leaching solution; low-acid leaching is conducted, specifically, the neutral leaching residues are subjected to low-acid leaching, and low-acid leaching residues and low-acid leaching liquid are obtained; arsenic removal and indium precipitation: mixing the low-acid leaching solution with an impurity removal agent for impurity removal to obtain an indium-containing solution; then adding a neutralizing precipitator into the indium-containing solution to precipitate indium, so as to obtain indium-rich slag and indium-precipitated liquid; high-acid leaching is conducted, specifically, the low-acid leaching residues are mixed with a second acid solution, high-acid leaching is conducted, and lead-silver residues and high-acid leaching liquid are obtained; the high-acid leaching liquid is returned to be used for low-acid leaching. According to the method, efficient dissolution and selective enrichment of indium are achieved, meanwhile, through the arsenic removal and indium precipitation step, the content of arsenic in the solution is reduced, and the generation risk of arsenic hydride in follow-up treatment is avoided.

The invention relates to the technical field of water treatment, and particularly discloses a preparation method of a composite catalyst and a process for degrading organic arsine by using the composite catalyst. The preparation method of the composite catalyst comprises the following steps: preparing a precursor: adding oxalic acid dihydrate into water, and uniformly stirring and mixing to obtain an oxalic acid dihydrate aqueous solution; the preparation method comprises the following steps: adding cobalt nitrate hexahydrate, ferrous sulfate heptahydrate, sodium thiosulfate pentahydrate and manganese chloride tetrahydrate into water, and uniformly stirring and mixing to obtain a solution A; dropwise adding the solution A into an oxalic acid dihydrate aqueous solution, stirring at 60-65 DEG C until the reaction is complete after dropwise adding, filtering, collecting filter residues, and cleaning to obtain a precursor; and carrying a carrier: carrying out ball milling on the precursor and nitrogen-doped graphene, and then heating and roasting for 2-3 hours at the final temperature of 350-400 DEG C in a nitrogen atmosphere to obtain the composite catalyst.