10 results about "Hydrogen arsenide" patented technology

The application provides a hydrogen arsenide reaction kettle feeding control method and device, equipment and storage medium, and belongs to the technical field of hydrogen arsenide reaction. The method comprises the following steps: determining an initial feeding mode of raw materials in the initial stage of reaction based on the volume of the reaction kettle and an expected reaction molar ratio; the raw materials comprise zinc arsenide and dilute sulfuric acid; the expected reaction molar ratio is an expected molar ratio between the zinc arsenide and the dilute sulfuric acid; in response to a pressure change rate in the reaction kettle being less than a preset change rate value, switching the initial feeding mode to a uniform feeding mode of the raw materials in the middle stage of reaction; and in response to a generation rate of hydrogen arsenide being lower than a preset generation rate value, switching the uniform feeding mode to a final feeding mode of the raw materials in the late stage of reaction. The hydrogen arsenide reaction kettle feeding control method and device, equipment and storage medium provided by the application can accurately grasp the feeding time and feeding speed of the reaction kettle.

The invention discloses a method for efficiently removing arsenic from a crude germanium tetrachloride solution based on arsenic hydride reduction, and belongs to the technical field of rare and noble metal metallurgy. According to the method, arsenic hydride gas is introduced into a crude germanium tetrachloride solution containing arsenic impurities under the protection of inert atmosphere and under the mild condition of 20-80 DEG C; the arsenic hydride and arsenic compounds such as arsenic trichloride, arsenious acid and arsenic acid in the solution are subjected to selective reduction reaction to generate simple substance arsenic solid precipitate. Then a germanium tetrachloride solution subjected to deep arsenic removal can be obtained through simple solid-liquid separation operation, obtained arsenic-containing solids are washed and dried, and resource recycling of crude arsenic products is synchronously achieved. The method provided by the invention initiates a new arsenic removal path of reduction-precipitation, has the outstanding advantages of high arsenic removal efficiency, good selectivity, short process flow, no secondary pollution and capability of realizing arsenic resource utilization, and provides a brand new solution for green and efficient preparation of high-purity germanium tetrachloride.

The invention relates to the field of physical and chemical analysis of chemical substances, in particular to a method and a device for simultaneously testing trace mercury and arsenic in a water body through mass spectrometry. The method comprises the following steps: introducing hydrogen into a water body sample to obtain gas a; introducing the gas a into an enrichment device; and introducing carrier gas into the enrichment device, heating, continuously introducing the gas b discharged from the enrichment device into an atomizing chamber of the inductively coupled plasma mass spectrometer by using the carrier gas, or directly introducing the gas a into the atomizing chamber by using the carrier gas. According to the invention, hydrogen reacts with mercury and arsenic elements in a water sample to generate elemental mercury and arsenic hydride, so that the interference of a sample substrate on the test is avoided, and meanwhile, salt in the sample is prevented from being deposited in the interception cone and the atomization chamber in the atomization process, so that the replacement frequency of key parts is reduced, the equipment operation cost is reduced, and the test efficiency is improved. And the accuracy of a test result is improved.

The invention provides a preparation method of nanoscale arsenic particles, and belongs to the technical field of nano materials. The invention provides a preparation method of nanoscale arsenic particles, which comprises the following steps: mixing arsenic trioxide and concentrated hydrochloric acid with the mass fraction of 10-35% for double decomposition reaction to obtain a hydrochloric acid aqueous solution of arsenic trichloride; under the oxygen-free condition, arsenic hydride-containing gas is introduced into the hydrochloric acid aqueous solution of arsenic trichloride for a neutralization reaction, the nanoscale arsenic particles are obtained, and the particle size of a single arsenic particle is 65-85 nm. According to the method, safe and practical nanoscale arsenic particles can be obtained by using the arsenic hydride-containing gas and the hydrochloric acid aqueous solution of arsenic trichloride at normal temperature and normal pressure, only water is generated in the neutralization reaction, extra waste residues and waste liquid are not generated, and the method is simple in equipment, less in maintenance, short in process, low in energy consumption and few in by-products.

Measurement devices can be used for identifying concentration of arsenic species in water samples. The measurement devices can take the form of test strips including a substrate with at least one testing region that includes an amount of a testing medium. The silver reagent includes a polymer framework and a silver component that is stabilized by the framework, yet remains reactive enough to function as a colorimetric sensor for arsenic, e.g., ((Ag(H2btc))(Ag2(Hbtc)))n. The initially substantially colorless testing medium exhibits a color change response when exposed to arsenic species, e.g., arsine, generated from samples including as little as 5 ppb arsenic, with an increasingly dark color as the concentration of arsenic is increased. Test strips fabricated with the silver coordination polymer display robust stability towards both light and water, allowing for an alternative to mercury-based field test kits in real-world field tests under direct sunlight and high humidity conditions.

The invention belongs to the technical field of adsorbent production, discloses a production device of an arsenic hydride adsorbent, and aims to solve the problems that according to existing production equipment, a filter drum is mounted through a threaded structure, then materials are fed and discharged, the structure is inconvenient for industrial treatment of the materials, and the materials are impacted at high frequency in an up-down moving mode, so that the production efficiency is high. In order to solve the problem that materials can be added and discharged easily due to the fact that large noise is easily generated, according to the scheme, a box body is included, a feeding port is formed in the top face of the box body, a liquid discharging pipe with a stop valve is fixedly installed at the bottom of one side of the box body, and an arc-shaped filtering plate, the feeding port and a discharging device are fixedly installed in the box body. According to the device, materials can be conveniently subjected to industrial processing treatment, the materials and impurities can be rapidly separated through flushing of the liquid spraying device, the impurities can be separated out through the filtering device, follow-up treatment is facilitated, the materials can be directly impacted through the knocking block, and the impurity stripping efficiency is higher.

The invention relates to a method for determining the content of arsenic compounds in petroleum gas. The method comprises the following steps: enabling the petroleum gas to enter a quantitative gas charging device; the petroleum gas in the quantitative inflation device enters an alkyl arsenic absorption cell for alkyl arsenic absorption, and then enters an arsenic hydride absorption cell for arsenic hydride absorption; the flow velocity of the petroleum gas is 10-50 mL / min; determining the arsenic content c1 in the alkyl arsenic absorption liquid; determining the arsenic content c2 in the arsenic hydride absorption liquid; the alkyl arsenic content rho1 in the petroleum gas is calculated according to the following formula (1), and the arsenic hydride content rho2 in the petroleum gas is calculated according to the following formula (2): rho1 = (c1 * v1) / V, [rho] 2 = (c2 * v2) / V, formula (2), wherein v1 represents the volume of the alkyl arsenic absorption liquid; v2 represents the volume of the arsenic hydride absorption liquid; and V represents the volume of the petroleum gas. The method is simple to operate and accurate in arsenic content determination.

The utility model discloses a waste liquid treatment system for arsenic hydride production. The waste liquid treatment system comprises a collection reactor, a sedimentation tank and a filter, the collection reactor comprises a collection reactor main body and a stirrer arranged in the collection reactor main body, and a liquid caustic soda adding port is formed in the collection reactor main body; the settling tank comprises a settling tank main body, and a feed port of the settling tank main body is communicated with a discharge port of the collecting reactor main body; the filter comprises a filter main body, a filter cartridge is arranged in the filter main body, the upper end of the filter cartridge is communicated with a pressure cavity, and the pressure cavity is communicated with a liquid outlet of the settling tank main body. And separating particulate matters from the clear liquid through primary natural sedimentation, filtering through a filter bag to remove smaller particulate matters, and recycling the clear liquid as an industrial zinc sulfate solution.

The utility model relates to a device for preparing high-purity arsenic, which comprises an electrode reaction tank, the electrode reaction tank comprises an anode plate, a cathode plate and a power supply, the anode plate and the cathode plate are arranged in the electrode reaction tank, the power supply is electrically connected with the anode plate and the cathode plate, and an oxygen outlet and an arsenious acid inlet are sequentially arranged on the side wall of the electrode reaction tank close to the anode plate from top to bottom. An arsenic hydride discharge port is formed in the upper part of the side wall, close to the cathode plate, of the electrode reaction tank; the arsenic hydride discharge port is connected with a tubular heater, an outlet of the tubular heater is connected with a condensation collecting tank, and an outlet of the condensation collecting tank is connected with a hydrogen peroxide washer. According to the device, the electrode reaction tank, the tubular heater and the condensation collection tank are connected to form the high-purity arsenic preparation device adopting the electrode and thermal decomposition method, and the device can be used for preparing high-purity arsenic, can be used for efficiently recovering arsenic elements in arsenide waste residues generated in the metallurgical process, and fully realizes resource recycling.

The invention relates to the technical field of industrial safety monitoring, in particular to an arsenic hydride storage tank health state diagnosis method and system based on industrial vision. The method comprises the following steps: collecting multi-moment images through industrial vision in a stable operation stage of the storage tank, dividing a stable observation area through geometric alignment and structural constraint, extracting visual features reflecting the shape consistency of the tank body, and establishing a visual health reference through statistical analysis; images are continuously collected in the operation stage, multi-scale visual features are extracted, and a feature time sequence is constructed to describe structural state evolution; by calculating the offset of the operation characteristics and the health benchmark, an overall evolution offset index is obtained through smooth processing and weighted aggregation, and quantitative judgment of the health state is achieved in combination with sliding window trend analysis and dynamic threshold judgment; and performing short-term trend prediction based on the historical offset sequence, and generating prediction and early warning information through structural sensitivity correction and risk grade division. According to the invention, closed-loop health diagnosis from state monitoring to trend pre-judgment is realized.