13 results about "Arsenic Compound" patented technology

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 present invention belongs to the field of medicine and chemical industry, and relates to an organic arsenic compound DMMTA V The application of DMA in the preparation of drugs for treating skin inflammation comprises the following steps: V The mixture was dissolved in ultrapure water and anhydrous sodium sulfide, reacted in an ice bath, and concentrated sulfuric acid was slowly added dropwise. The mixture was magnetically stirred under argon protection. After the reaction, pre-cooled methanol was added for crystallization. HCl was added to adjust the pH. The mixture was dehydrated in a water bath. Chloroform was used for extraction. After drying and evaporation, methanol / water was added for cooling and crystallization. The organic arsenic compound DMMTA was obtained after vacuum drying. V .DMMTA V It can not only relieve inflammation by increasing MMP‑9 and reducing TIMP‑1 to promote the reconstruction of the respiratory tract and lungs and participate in angiogenesis, but also reduce the excessive secretion of inflammatory factor 8 caused by lipopolysaccharide, reduce damage to human skin keratinocytes, and relieve skin inflammation.

A deuterated phenylarsenic oxide or a pharmaceutically acceptable salt thereof and pharmaceutical compositions containing a pharmaceutically acceptable carrier and the deuterated phenylarsenic oxide. The deuterated phenylarsenic oxide is useful for the treatment and prevention of cancer and related diseases.

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 application discloses a cadmium-arsenic compound pollution plant response dynamic monitoring system based on time sequence image analysis, and relates to the technical fields of environmental monitoring and image analysis.The system comprises a multi-time-phase image acquisition module, a self-adaptive registration engine, a response feature decoupling extraction module, an illumination environment normalization module and a pollution early warning decision module, can eliminate visual angle deviation through time sequence image accurate registration, can separate pollution response and natural growth through response feature decoupling, can exclude non-pollution interference through illumination environment normalization, and can realize early warning through pollution early warning decision.The system can identify pollution signals when the soil cadmium-arsenic concentration is less than 50% of the national standard limit value, the monitoring accuracy is more than 95%, and the pollution risk can be found 3-5 weeks in advance compared with traditional methods, so that the system provides an effective technical means for soil heavy metal pollution prevention and control.

The invention discloses an arsenic flue gas high-temperature filtering and purifying device, and relates to the technical field of arsenic flue gas purification, the arsenic flue gas high-temperature filtering and purifying device comprises a gas inlet system, a pretreatment system, a high-temperature filtering system, a purifying system, a condensing system and a tail gas treatment system which are sequentially connected according to a gas treatment flow, a gas outlet of the gas storage bag is connected with a plurality of blowing pipes which are positioned right above the pulse bag-type dust collector. The temperature interval is accurately set in the high-temperature filtering system, the optimal filtering temperature interval is determined, T is larger than or equal to 350 DEG C to 460 DEG C, it is ensured that arsenic flue gas is treated in the optimal filtering temperature interval, in the high-temperature environment, condensation and deposition of arsenic compounds in the filtering process can be effectively avoided, the filtering efficiency and the purification effect are improved, the arsenic filtering rate is larger than or equal to 99.95%, and the arsenic removal rate is larger than or equal to 99%. The stability and the high efficiency of the whole treatment process are ensured, so that impurities and target substances in the arsenic flue gas are separated more accurately.

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 invention discloses an online arsenic removal device and a detection method.The online arsenic removal device comprises a recovery tank and a weighing device, filter cloth is arranged in the recovery tank, a nano-metal adsorbent is arranged in the filter cloth, a feeding port and an exhaust port are formed in the top of the recovery tank, and a discharging port is formed in the bottom of the recovery tank; a nitrogen inlet and a material changing opening are formed in the side wall. The online arsenic removal device has the advantages of being novel in structural design, low in production cost, flexible and simple in operation, efficient in arsenide separation and the like, can improve the efficiency of the device and reduce the cost in the field of chemical production, and has important guiding significance for operation, recovery and development of chemical production devices and technical services of the production devices.

The invention discloses an arsenic in-situ growth-metal organic framework material which is arsenic oxide nanoparticles formed in situ on the surface of a metal organic framework material by performing ligand exchange on an arsenic compound and the metal organic framework material, the arsenic compound is selected from sodium arsenite, disodium arsenate heptahydrate, arsenic trioxide and the like; the metal organic framework material is selected from ZIF-8 and the like. The invention also discloses bionic nano-particles for in-situ growth of arsenic. The bionic nano-particles are formed by coating an arsenic in-situ growth-metal organic framework material with a cell membrane. The invention further discloses application of the arsenic in-situ growth-metal organic framework material and the bionic nanoparticles in preparation of drugs for treating cancers. The arsenic in-situ growth-metal organic framework material disclosed by the invention is bionic nano-enzyme with enzyme-like activity and dual epigenetic regulation and control effects, and is uniform in morphology and relatively small in particle size; and due to cell membrane coating, the bone marrow targeting property is realized, the problem of insufficient targeting property of an arsenic compound is solved, and the tumor immunotherapy effect is enhanced.

A low-cost concentration and stepwise extraction and utilization process for valuable components of coal mine water is disclosed. This process employs pretreatment of mine water using drift flotation and flocculation sedimentation to remove impurities. Through oblique light correction to enhance solar radiation energy, film overflow heating of the mine water, flash distillation of hot mine water, and condensation collection, the mine water is concentrated at low cost within a solar distillation device. Metal and heavy metal components are extracted from the mine water through solid-phase and liquid-phase chemical conversions and utilized as resources. Highly toxic chromium and radioactive uranium are captured from the mine water using an adsorption + reduction method. Arsenic compounds are adsorbed using a loaded fluoride ion adsorbent. This process achieves low-energy consumption, resource recovery, and harmlessness in mine water treatment, enabling clean and circular utilization of the mine water. It represents a technology for fundamentally controlling mine wastewater pollution.

The present invention belongs to the field of cancer therapy and relates to a composition or product comprising at least one retinoid compound, at least one arsenic compound and at least one proteasome inhibitor, for use in the treatment of acute myeloid leukemia (AML) where the tumor cells are positive for the FLT3-ITD mutation.

The application provides a high-arsenic coal arsenic removal treatment device, which comprises a conveying belt for conveying coal, a coal overturning mechanism, a microwave ultraviolet photolysis module and a hot air system arranged above the conveying belt, the coal overturning mechanism comprises a first support installed above the conveying belt, and a plurality of distribution assemblies are arranged on the first support in the width direction of the conveying belt; the microwave ultraviolet photolysis module comprises a second support installed above the conveying belt, a quartz tube is installed on the second support, and a microwave source and an ultraviolet lamp are installed in the quartz tube; and the hot air system comprises an air blower and a cover shell installed above the conveying belt. Through the synergistic effect of the coal overturning mechanism, the microwave ultraviolet photolysis module and the hot air system, the coal is fully overturned, photolytic oxidation and hot air catalysis are realized in a closed space, the volatilization efficiency of arsenic compounds is significantly improved, the arsenic content in the coal is reduced by 50%-70%, the problem that the activity of an SCR catalyst is reduced is effectively alleviated, and the service life of the catalyst is prolonged.

The invention belongs to the field of tumors, and relates to application of an inorganic arsenic compound or a metabolite of the inorganic arsenic compound in preparation of NRF2 continuous high-expression drugs, after HaCaT and MIHA cells are exposed by DMMTAV with different concentrations, the total protein expression level of cell KEAP1 is reduced, and the total protein expression level of NRF2 is increased; furthermore, after the purified KEAP1 protein is treated by 10.0 [mu] M DMMTAV, free sulfydryl groups in the KEAP1 protein are obviously reduced. The result shows that the arsenic metabolite DMMTAV is combined with the key cysteine residue of the KEAP1 protein, so that the conformation is changed, the function is lost, and the stability is reduced, thereby releasing the NRF2 and activating the antioxidant pathway. In conclusion, the inorganic arsenic compound and metabolites can be combined with KEAP1 protein sulfydryl to mediate continuous high expression of NRF2.