184 results about "Arsenic Compound" patented technology

The invention relates to the use of arsenic compounds to treat a variety of neoplastic diseases. The present invention encompasses the administration to a mammal of arsenic in the form of a salt, complex, organic compound or ionic solution to treat tumors of epithelial tissue, connective tissue, central nervous system, lymphoid tissue, hematopoietic cells and tumors associated with oncogenic viruses. This invention also encompasses the treatment of hematopoietic disorders in mammals by the administration of one or more arsenic compounds to said mammal. Further, the arsenic compounds may be used to treat metastatic neoplastic diseases.

The invention relates to the use of arsenic compounds to treat a variety of leukemia, lymphoma and solid tumors. Further, the arsenic compounds may be used in combination with other therapeutic agents, such as a retinoid. The invention also provides a process for producing arsenic trioxide formulations.

The invention relates to the use of arsenic compounds to treat a variety of leukemia, lymphoma and solid tumors. Further, the arsenic compounds may be used in combination with other therapeutic agents, such as a retinoid. The invention also provides a process for producing arsenic trioxide formulations.

The invention relates to a determination method for inorganic arsenic in aquatic products. After being extracted by hydrochloric acid solution, the inorganic arsenic (1plus1) in the aquatic products passes through an anion-exchange column, and arsenite As (III), dimethyl arsenic compound DMA, methyl arsenic compound MMA and arsenate As (V) are eluted sequentially by mobile phase; owing to different adsorption capacities of the anion-exchange column on the arsenate As (V), the arsenite As (III), the methyl arsenic compound MMA, the dimethyl arsenic compound DMA and arsenic sugar AsS, the eluted solution is hydrogenated by borohydride potassium reducing agent and hydrochloride, and hydride is generated, enters an atomizer, and is subject to analytic determination by being combined with atomic fluorescence. The experimental condition is reasonably selected, and the detecting data is accurate and reliable and can not be influenced by extraction time and temperature. The determination method of inorganic arsenic in aquatic products of the invention not only can detect the inorganic arsenic iAs accurately, but also can determine the methyl arsenic compound MMA and the dimethyl arsenic compound DMA of the organic arsenic, and can be used for the morphometry of the arsenic in the aquatic products.

The invention relates to the use of arsenic compounds to treat a variety of neoplastic diseases. The present invention encompasses the administration to a mammal of arsenic in the form of a salt, complex, organic compound or ionic solution to treat tumors of epithelial tissue, connective tissue, central nervous system, lymphoid tissue, hematopoietic cells and tumors associated with oncogenic viruses. This invention also encompasses the treatment of hematopoietic disorders in mammals by the administration of one or more arsenic compounds to said mammal. Further, the arsenic compounds may be used to treat metastatic neoplastic diseases.

The present invention relates to arsenic sulfide compounds. The present invention also relates to pharmaceutical compositions useful for treating cancer, such as leukemia or lymphoma, which comprises an arsenic sulfide compound. The present invention further relates to methods for treating cancer, such as leukemia or lymphoma, using an arsenic sulfide compound. Finally, the present invention relates to processes for producing arsenic disulfide (As4S4).

The invention provides a heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent. The heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent is prepared from the following components in percentage by weight: 30-50 percent of biomass charcoal, 5-10 percent of diatomite, 5-10 percent of sodium bentonite, 5-10 percent of activated aluminum oxide, 10-20 percent of dithiocar-bamate, 5-10 percent of ethylenediaminetetraacetic acid, 5-10 percent of tartaric acid, 5-10 percent of polyacrylamide and 5-10 percent of sodium dodecyl sulfate. A preparation method for the heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent comprises the following steps: mixing the biomass charcoal, diatomite, sodium bentonite, activated aluminum oxide, ethylenediaminetetraacetic acid, tartaric acid, polyacrylamide and sodium dodecyl sulfate in mass proportion to obtain a mixture; and adding the dithiocar-bamate into the mixture in corresponding mass proportion to sufficiently mix uniformly, thereby obtaining the prepared soil restorative agent. The prepared soil restorative agent has good effect in restoring the cadmium, lead and arsenic compound contaminated soil.

The invention relates to the field of denitration catalyst regeneration, and discloses a regeneration method of an inactivated denitration catalyst. The method comprises the following steps that the inactivated denitration catalyst is subjected to first soaking by pre-pickling liquid after physical dust removal is completed, and is then subjected to first bubbling cleaning; (2) the catalyst cleaned in the first step is subjected to second soaking by oxidation cleaning liquid, and is then subjected to oxidation ultrasonic cleaning; (3) the catalyst cleaned in the second step is subjected to third soaking by alkali washing liquid, is then subjected to ultrasonic alkali washing and is rinsed by water; (4) the catalyst cleaned in the third step is subjected to ultrasonic acid washing by acid washing liquid, and is then subjected to second bubbling cleaning; (5) the catalyst cleaned in the fourth step is impregnated by impregnating liquid; then, drying and calcination are performed to obtain a regenerated denitration catalyst. Substeps are used for chemical cleaning; the goal of clearing arsenic compounds deposited in inactivated denitration catalyst micropores can be effectively realized; the denitration efficiency of the inactivated denitration catalyst is effectively recovered.

A new family of superconducting materials with critical temperature up to 55 K have recently been discovered, comprising a crystal structure with atomic layers of iron and arsenic alternating with atomic layers of rare-earth oxide or alkaline earth. The present invention identifies structures for integrated circuit elements (including Josephson junctions) in these and related materials. These superconducting circuit elements will operate at a higher temperature than low-temperature superconductors such as niobium, and may be easier to manufacture than prior-art high-temperature superconductors based on copper-oxides.

Disclosed herein is a method for treating arsenic-contaminated soil, which is capable of insolubilizing arsenic compounds (organic form or tri- or pentavalent inorganic form), thereby reducing their leaching to below the soil environmental standard value . The method consists of the following steps: the arsenic-contaminated soil is heated at 200-700° C., and then the heated soil is mixed with calcium compound and water. The method can also be composed of the following steps: arsenic-contaminated soil is mixed with calcium compound, then the mixed soil is heated at 200-700° C., and the heated soil is mixed with water again.

The invention relates to a method for analyzing the speciation of arsenic elements in smoke of cigarettes. The method is characterized by comprising the steps of capturing arsenic in particulate matter of smoke by virtue of a rotary disc smoking machine with an electrostatic capturing device, extracting arsenic compounds of different speciation in the particulate matter by virtue of a diammonium hydrogen phosphate solution, and quantitatively analyzing the release amount of arsenic elements of different speciation by virtue of an HPLC-ICP-MS (High Performance Liquid Chromatography-Inductively Coupled Plasma-Mass Spectrometry) technique so as to realize the quantitative analysis on the speciation of the arsenic elements in main stream smoke of the cigarettes. The method has the advantages that a sample pretreatment process is simple, convenient and rapid, the consumption amount of an extraction reagent is little, a separating effect of the speciation of As elements is good, the analytical interference is less, the sensitivity is high, the linearity range is wide, the precision is high, and a technical support is provided for accurately estimating the security risk of the As elements in the main stream smoke of the cigarettes.

The present invention relates to a method of treating cancer in a subject in need thereof, by administering to the subject a combination of sodium meta arsenite and / or arsenic trioxide and a cytotoxic anticancer agent, such as cisplatin, adriamycin, and taxane, such as larotaxel, orataxel, tesetaxel, docetaxel or paclitaxel. The arsenic compound(s) and cytotoxic anti-cancer agent may be administered together in a composition or separately as a combination therapy.

An arsenic compound solution, and an albumin nanoparticle and a lyophilized preparation prepared using same and entrapping an arsenic compound. The arsenic compound solution is prepared using the following method: adding As2O3 powder in sterile deionized water to obtain a suspension, 6 to 25 mg of As2O3 powder being added in every mL of sterile deionized water; dripping an NaOH solution to the obtained suspension until the powder is fully dissolved and adjusting the pH of the solution to 7.5 to 9, and making the concentration of the obtained arsenic compound solution be 5 to 20 mg / mL in terms of the added As2O3. The albumin nanoparticle is prepared by mixing an albumin solution and the arsenic solution and the arsenic solution with the mass ratio of the added As2O3 in arsenic compound solution to the albumin ranging from 1:5 to 1:20 and using a method of solvent removing and physical curing.

The invention discloses a comprehensive treatment method for smelting dust containing miscellaneous gold concentrate and belongs to the technical field of precious metal pyrometallurgy. The comprehensive treatment method for the smelting dust containing the miscellaneous gold concentrate comprises the steps that firstly, the smelting dust is subjected to primary hydrochloric acid leaching, leachedslurry is subjected to high-price antimony reduction and hydrolysis antimony fixing, high-antimony gold concentrate and primarily-hydrolyzed liquid are obtained, secondary hydrochloric acid leachingis conducted on the high-antimony gold concentrate, high-grade gold concentrate with low impurities and secondary lixivium are obtained, high-grade oxychloride and secondarily-hydrolyzed liquid are obtained after hydrolysis is conducted on the secondary lixivium, dechlorinating transformation is conducted on the oxychloride, and then an antimony white terminal product is obtained; and a molysite arsenic fixing process is adopted for arsenic-containing liquid, and stable low-toxicity arsenic compound ferric arsenate and arsenic-removed liquid are obtained. By the adoption of the method, the smelting dust containing the miscellaneous gold concentrate is treated, the precise metal antimony can be effectively recovered, and the harmful element arsenate is fixed, so that the industrial problemthat arsenic and antimony dust is difficult to treat is solved.

A method of treatments for arsenic-sensitive blast-cell related diseases comprising administering a therapeutically effective amount of arsenic compounds to a human or an animal.

The invention provides an arsenic-containing solid material comprising 100 parts by mass of a scorodite-type iron-arsenic compound and 1 part by mass or more of an iron oxidation compound, wherein the scorodite-type iron-arsenic compound is synthesized by adding an oxidizing agent to an acidic aqueous solution containing a pentavalent arsenic ion and a bivalent arsenic ion to cause the precipitation of the iron-arsenic compound to proceed while agitating the solution, and terminating the precipitation at a pH value of 1.2 or lower. The iron oxidation compound may be goethite, hematite, or a mixture thereof. It is preferred to use an iron oxidation compound having a BET specific surface area of 3 m<2> / g or more, preferably 20 m<2> / g or more.

The invention provides a soil conditioner for repairing a cadmium-arsenic compound polluted farmland and a preparation method thereof, and the soil conditioner comprises the following raw materials inparts by weight: 40-50 parts of a calcium fertilizer, 20-30 parts of a magnesium fertilizer, 10-20 parts of a silicon fertilizer, 5-10 parts of humic acid and 5-20 parts of hydroxyl iron pillared attapulgite. Compared with the prior art, the soil conditioner for repairing the cadmium-arsenic compound polluted farmland provided by the invention can effectively inhibit the migration of cadmium andarsenic in farmland soil at the same time, and passivation of the cadmium and the arsenic based on both the farmland soil and crops can be performed. Moreover, the raw materials are mostly composed ofnatural minerals, the cost is low, the materials are simple and convenient, and the industrial production is facilitated. The produced soil conditioner contains the calcium, magnesium, silicon fertilizers and the like, effectively activates and supplements nutrient elements such as calcium, phosphorus, potassium and the like fixed by acidification of the soil, and can achieve the effect of balanced fertilization in use. The production method of the soil conditioner is simple and feasible, and has wide popularization prospect.

There is disclosed a method of manufacturing a semiconductor device comprising forming a diffusion region containing arsenic impurity at a concentration of 1×1020 cm−3 or more in an element region of Si substrate which is isolated by an element isolating insulation film with a gate electrode being employed as a mask, depositing Ni metal all over the substrate, heat-treating the substrate at a temperature of less than 400° C., thereby forming a nickel silicide film containing Ni2Si on the diffusion region, removing unreacted Ni metal deposited on the element isolating insulation film, heat-treating the substrate at a temperature of 450° C. or more, thereby forming an NiSi film having a arsenic compound layer on the surface thereof, removing the arsenic compound layer by an alkaline liquid, depositing an interlayer insulating film the entire surface of the substrate, and forming a wiring layer piercing through the interlayer insulating film.

A method of producing an iron-arsenic compound by adding an oxidizing agent to an aqueous solution containing arsenic ions and bivalent iron ions and allowing an iron-arsenic compound precipitation reaction to proceed under stirring of the solution, wherein the precipitation reaction is terminated at a solution pH in the range of 0 to 1. When the arsenic concentration of the pre-reaction solution is 25 g / L or greater, the reaction can be terminated at a solution pH in the range of −0.45 to 1.2. The pH of the pre-reaction solution is preferably greater than 0 and not greater than 2.0. A ferrous sulfate is can be used as the source of the bivalent iron ions. Even when some amount of impurity elements is present in the arsenic-containing solution, the method is nevertheless capable of forming a scorodite compound excellent in crystallinity in the form of a compact compound barely swollen by moisture and the like, i.e., a niron-arsenic compound excellent in filterability.

The invention provides a cadmium-arsenic compounded pollution repairing agent. The cadmium-arsenic compounded pollution repairing agent is composed of calcium carbonate, silicon-calcium-magnesium fertilizer, humic acid-modified clay and Fe(OH)3 which are mixed at a weight ratio of 10-30:30-60:10-40:1-10, wherein the humic acid-modified clay is prepared through clay acidification, acidified clay alkali metal ionization and humic acid modification. The invention further provides a preparation method of the cadmium-arsenic compounded pollution repairing agent. The preparation method of the cadmium-arsenic compounded pollution repairing agent comprises (1) clay acidification, (2) acidified clay alkali metal ionization, (3) clay humic acid modification and (4) preparation of the cadmium-arseniccompounded pollution repairing agent. The cadmium-arsenic compounded pollution repairing agent can effectively reduce activity of cadmium, influence dissolution of arsenic, achieve passivated heavy metal absorbing effects, increase the content of soil organic matters, improve the soil structure and promote plant growth.

The invention provides a method for detecting an arsenic content in a water body. The method comprises the following steps of: a) providing a sample to be detected, and mixing protonic acid with the sample to be detected containing hydrogen sulfide, so that the protonic acid and sulfide in the sample to be detected are reacted to generate the hydrogen sulfide; b) introducing air into the sample to be detected containing hydrogen sulfide, and removing hydrogen sulfide; c) mixing a reducing agent with the sample to be detected, so that an arsenious compound is reduced to be arsenic hydride; and d) absorbing arsenic hydride by using an absorbent and carrying out chromogenic reaction, detecting developed liquid through a spectrophotometry, and obtaining content of an arsenic element in the water body through calculation. The detection method provided by the invention not only can be used for effectively removing sulfide interference but also is environmentally-friendly and easy to operate. The invention further provides a device for detecting the arsenic content in the water body.

The invention relates to a method for recovering gold from a sulphidic concentrate, particularly one containing arsenopyrite and / or pyrite, hydro- metallurgically. The concentrate is first subjected to leaching with a concentrated solution of alkali chloride and copper (II) chloride, by means of which the copper minerals and some of the gold in the concentrate are made to dissolve. Elemental sulphur and precipitated iron and arsenic compounds are separated from the leaching residue using physical separation methods, whereby the first intermediate is obtained, which contains gold- bearing sulphide minerals and gangue minerals as well as the gold that remains undissolved. The free gold that remains undissolved is separated by means of gravity separation methods. After gravity separation, additional comminution is carried out, after which the sulphide minerals are decomposed and the gold-containing solution or residue is routed to the concentrate leaching circuit.

The invention relates to a method for precipitating pentavalent calcium arsenate from an acidic solution, in which arsenic is at least partially in trivalent form. The acidic solution is neutralised before being routed to an arsenic oxidation stage,and a poorly soluble calcium-arsenic compound is precipitated from the solution, in which all the arsenic is pentavalent.

The invention relates to an instrument coupled speciation measuring method of a gaseous arsenic compound, solving the problems of sensitive, fast and accurate analysis and measurement of the gaseousarsenic compound. The method is carried out on a gaseous arsenic compound analyzing and measuring on-line coupled system comprising a standard generation or sample collection device, a low-temperaturetrapping device, a vacuum heat-insulation separating tank, a gas-carried pipeline, a hydrogen generation device, an atomic fluorescence spectrometer and a signal recording device and comprises the following steps: a, generating an arsenic compound or collecting samples; b, trapping and separating the gaseous arsenic compound; c, separating the gaseous arsenic compound; and d, detecting the gaseous arsenic compound. The invention has the advantages of ideal separating effect on the gaseous arsenic compound, good reproducibility, high sensitivity, good linear independence of the gaseous arseniccompounds with different concentrations, wide linear range, good stability, low cost, simple operation and low analysis cost.

Scorodite-type iron-arsenic compound particles in which the particle surface layer part comprise an iron-rich layer having an Fe / As molar ratio of at least 1.24. The particles can be obtained in a reaction process of feeding an oxygen-containing gas to an aqueous solution containing an arsenic(V) ion and an iron(II) ion to precipitate a scorodite-type iron-arsenic compound crystal at a pH of at most 2, in which an oxidizing agent is further added to the liquid before the end of the reaction (treatment A). The particles may also be obtained by a method comprising keeping a scorodite-type iron-arsenic compound particle of good crystallinity in contact with an iron ion-containing aqueous solution having a controlled pH of from 2 to 9 at 0 to 90° C. (treatment B). The scorodite-type iron-arsenic particles have good filterability and excellent arsenic release-preventing effect.

The invention provides an arsenic sulfide residue transformation and microcapsule curing stabilization method. The arsenic sulfide residue transformation and microcapsule curing stabilization method comprises the following steps that (1) arsenic sulfide residues are used as raw materials to prepare arsenic trioxide; (2) the arsenic trioxide is used as the raw material to prepare 4-hydroxy-3-nitrophenylarsonic acid; (3) an iron-manganese binuclear clustered metal arsonate compound of a porous structure is prepared; (4) silicon coating is conducted on the surface of the iron-manganese binuclearclustered metal arsonate compound of the porous structure; (5) Fe(0) / Al-SBA-15 mesoporous compound stabilizing agent is compounded by means of a hydrothermal reaction; (6) microcapsule curing stabilization treatment is conducted on the iron-manganese binuclear clustered metal arsonate compound with the surface coated with silicon. According to the arsenic sulfide residue transformation and microcapsule curing stabilization method, the 4-hydroxy-3-nitrophenylarsonic acid is prepared through transformation, the metal arsonate compound of the porous structure is prepared finally, compared with atraditional arsenic compound, the prepared metal arsonate compound has the features of being good in stability and low in toxicity, and the toxicity of the arsenic compound is greatly lowered.

The invention discloses a purification method of converter gas. The method comprises the following steps: 1) air entrainment: pressurizing converter gas after dust removal and temperature reduction, delivering the pressurized converter gas to a temperature swing adsorption unit; 2) temperature swing adsorption: sending to the gas treated by the step 1) to an adsorption bed to remove sulphur, phosphorus and arsenic of the gas through pressure swing and temperature swing adsorption, wherein the adsorbent in the adsorption bed uses activated carbon, silica gel or aluminum oxide as carrier which is loaded with 0.1-15wt% of one or more of the compounds of potassium, sodium, calcium, magnesium, zinc, iron or copper; and 3) fine arsenic removal: sending the gas treated by the step 2) to a fixed bed reactor to perform catalytic absorption and remove arsenic compounds in the mixed gas. The purification method of the invention has clever conception, simple process and low investment and can effectively reduce the contents of poisonous and harmful impurities in converter gas and meet the requirements of chemical production on the raw material.

The invention discloses a stabilizing agent for treating cadmium and arsenic compound pollution waste residue / soil. The stabilizing agent is prepared from the components in percentage by mass: 20-45%of quicklime, 20-50% of calcium peroxide and 30-60% of iron salt modified clay mineral. The invention further discloses a stabilizing method for treating the waste residue / soil by the stabilizing agent. The stabilizing method comprises the steps that (1) quicklime and water are added to the cadmium and arsenic compound pollution waste residue / soil and stirred and mixed uniformly, and the waste residue / soil pH is adjusted to be larger than 7.5; (2) calcium peroxide is added, and stirred and mixed uniformly; (3) the iron-based modified clay mineral is added, and stirred and mixed uniformly; and(4) curing is performed to complete the stabilization treatment of the cadmium and arsenic compound pollution waste residue / soil. The stabilizing agent can simultaneously stabilize cadmium and arsenicin the waste residue (soil) in a solidification mode, and the treatment effect is good. The addition of calcium peroxide in the stabilizing agent can continuously and stably increase a redox potential of the waste residue, heavy metal can be effectively prevented from being re-dissolved, and excellent long-term stability is achieved.

Dissolved inorganic contaminants are removed from a dilute aqueous stream by adding a hydrolysable metal compound to the aqueous stream, co-precipitating a hydrolyzed metal compound with the inorganic contaminants, and, concurrently with the co-precipitation step, filtering the co-precipitate from the dilute aqueous stream using a packed bed filter. The process may be carried out so that the metal oxide co-precipitate forms within the packed bed. Dissolved contaminants, particularly arsenic compounds, are removed more efficiently than by conventional co-precipitation / filtration processes. An apparatus for carrying out the process provides for injection of the hydrolysable metal compound into the dilute aqueous stream immediately upstream of the packed bed filter, without an intervening flocculation or sedimentation vessel, thereby providing an effective contaminant removal system that requires a smaller footprint and lower capital cost than conventional water treatment systems.

The invention discloses a method for carrying out precipitate impurity removal on a copper electrolyte. The method comprises the following steps: adding an antimony compound in the copper electrolyte to remove co-precipitates containing arsenic, antimony and bismuth in the copper electrolyte as a precipitant, then directly returning the copper electrolyte to an electrolysis system after the impurity removal, and comprehensively recovering the precipitates containing arsenic, antimony and bismuth through a gradient temperature-control firing method. Low-temperature decomposition is carried out on the precipitates to obtain a low-temperature decomposition gas and low-temperature decomposition residues under inert gas shied, the low-temperature decomposition gas is condensed to obtain an arsenic compound, high-temperature decomposition is carried out on the low-temperature decomposition residues under atmosphere control to obtain a bismuth compound and a high-temperature decomposition gas, the high-temperature decomposition gas is condensed to obtain an antimony compound, and the antimony compound is returned to a precipitate impurity removal procedure for the copper electrolyte as the precipitant. According to the method disclosed by the invention, arsenic, antimony and bismuth in the copper electrolyte are independently recovered in the form of high-purity compounds while being efficiently removed; and the method has the characteristics of being short in flow, simple to operate, high in removal rate, free from the emission of 'three wastes', capable of repeatedly using the precipitant, low in cost and the like, and is suitable for large-scale industrial production.