56 results about "Pentavalent Antimony" patented technology

The invention belongs to the technical field of water treatment and in particular relates to a method for removing pentavalent antimony pollutants in water through manganese ion enhanced electrochemistry. The method comprises the following steps: installing an iron plate as an anode and a steel plate as a cathode in an electrochemical reactor; adjusting the pH value of to-be-treated water containing the pentavalent antimony pollutants to 4-8, introducing the to-be-treated water into the electrochemical reactor, adding a manganese sulfate solution or a manganese chloride solution at a concentration of 0.1-5.0mmol/L and adjusting the current density to 0.5-10mA/cm<2>; carrying out electrochemical treatment for 5-20 minutes and supplying power by adopting a direct current electrical source. The pentavalent antimony pollutants can be rapidly and effectively removed by adopting the electrochemical method.

The invention discloses a detection method of purity of antimony pentafluoride products. The detection method comprises the following steps of: (i) preparing a sample, including sampling, solidifying and hydrolyzing; (ii) quantifying trivalent antimony, namely utilizing an oxidation-reduction titration method to measure the trivalent antimony; (iii) detecting total content of antimony, namely using an inductively coupled plasma emission spectrometer, selecting 206.836nm as an analytical line used for measuring, and detecting the content of total antimony elements in hydrolysate; (iv) calculating the content of pentavalent antimony, namely subtracting the content of the trivalent antimony from the total content of the antimony elements to obtain the content of the pentavalent antimony; andthrough calculating, obtaining the purity of the antimony pentafluoride products. The detection method is simple and convenient and feasible and is convenient for operation, the measurement accuracy is high, and the method is particularly suitable for detecting the purity of the antimony pentafluoride products prepared by fluoride and simple substance antimony as raw materials.

The invention relates to a method for measuring trace chemicals in water, particularly provides a method for determination of antimony in a water sample, and aims at solving the problems that existing methods for the determination of the antimony have respective shortcomings. The method for the determination of the antimony in the water sample includes that a solution of citric acid, a solution of sodium fluoride, a mixed solution of thiourea and ascorbic acid and a mixed solution containing oxygen hydroxide and potassium borohydride are prepared; the concentration of the antimony in a standard solution is used as a horizontal coordinate, and the fluorescence intensity is used as a vertical coordinate so that a standard curve can be drawn; the mixed solution of the thiourea and the ascorbic acid, and a solution of concentrated hydrochloric acid are sequentially added into the water sample containing the antimony, and an atomic fluorescence spectrometer (ASF) is used for measuring the concentration of total antimony in the water sample; the solution of citric acid, the solution of sodium fluoride, and the solution of concentrated hydrochloric acid are sequentially added into the water sample containing the antimony, and the ASF is used for measuring the concentration of trivalent antimony in the water sample; and the concentration of pentavalent antimony is obtained by subtracting the measured concentration of the trivalent antimony from the measured concentration of the total antimony. The solution of citric acid and the solution of sodium fluoride are utilized as combined masking agents, the pentavalent antimony and other interfering ions in the water sample can be well masked, the determination result of the trivalent antimony is enabled to be very accurate, and therefore the method for the determination of the antimony in the water sample is simple, easy to implement, accurate in determination result, and high in reproducibility.

The invention belongs to the technical field of water treatment and particularly relates to a method for quickly removing pentavalent antimony pollutant in water by combining sodium sulfite and electrochemistry. The method comprises the following steps: in an electrochemical reactor, an iron plate is taken as the positive pole, and a steel plate is taken as the negative pole; the pH value of to-be-treated water containing pentavalent antimony pollutant is adjusted to be 4 to 8, the water is poured into the electrochemical reactor, and in sodium sulfite with the total concentration of 0.05 to 1.0 mmol/L in the electrochemical reactor, the electric current density is adjusted to 1 to 5 mA/cm<2>, ratio of the polar plate area to the volume of the to-be-treated water is 1/10 to 1/5m<2>/m<3>, and the polar plate interval is 1 to 2 cm; the electrochemical treatment time is 5 to 20 minutes; a direct current supply is adopted to supply power. Through the electrochemical method provided by the invention, pentavalent antimony pollutant can be removed quickly and effectively.

Provided is a method of producing a glass, including, in order to obtain an excellent refining effect: preparing a raw glass batch including: an antimony compound containing pentavalent antimony; and an oxidizing agent (a cerium oxide, a sulfate, a nitrate); and melting the raw glass batch. In preparing the raw glass batch, it is preferable that the antimony compound be premixed with the oxidizing agent. When the nitrate is used as the oxidizing agent, the raw glass batch is prepared so as to include the antimony compound in an amount of more than 0.5 parts by mass and at most 3 parts by mass, in terms of an amount of antimony pentoxide, per 100 parts by mass of a base glass composition expressed in terms of an amount of an oxide.

The invention discloses a method for preparing nanometer sulfo antimony acid antimony via the uniform precipitation method, comprising the following steps: employing leukonin and antimony white as the raw materials; utilizing sodium sulfide to leach leukonin, thus to obtain a pentavalent antimony solution; employing the sodium chloride solution of the hydrochloric acid to leach antimony white forpreparing a trivalent antimony solution; slowly adding the two solutions into a buffer system containing a surfactant; and employing supersonic wave stirring for homogeneous precipitation. The generated precipitation, after receiving the treatment of aging, dispersing, rinsing, and drying in a tartrate solution, is turned into the nanometer sulfo antimony acid antimony product. The method features simple process and high yield, causes no pollution to the environment, and is easy to operate and put into industrial production. The color of the produced product is umber, with granularity being 93nm, and is compatible with the grease. The produced nanometer sulfo antimony acid antimony is an excellent extreme pressure-antiwear additive and solid lubricant of the lubrication grease. As an additive, the performance index of the product far exceeds the national standards about the extreme pressure lubrication grease.

The invention discloses a method for recycling elemental antimony in pentavalent antimony wastewater through photoelectric coupling. The method is characterized by comprising the following steps: reducing pentavalent antimony in water into trivalent antimony by using hydrated electrons; reducing trivalent antimony in the water into antimony by using an electrochemical reduction method so as to recycle antimony in the water. According to the method, a reduction material capable of generating hydrated electrons under excitation of light irradiation can be used as a source of the hydrated electrons; the secondary pollution is low; the hydrated electrons generated after excitation of light irradiation are capable of efficiently reducing pentavalent antimony which is relatively difficultly removed in the water into trivalent antimony which is relatively easily removed; the method is further combined with the electrochemical reduction method for reducing trivalent antimony in the water intoantimony, so that pentavalent antimony which is difficultly directly electrically deposited and recycled can be converted into elemental antimony; the antimony can be recycled; the method is stable and reliable, and is high in repeatability.

The invention discloses a deactivator. The deactivator comprises the following raw materials by mass percentage: 10-20% of a metal oxide, 20-40% of an oxidizing agent, 5-20% of an organic amine, and 25-40% of a solvent. The deactivator comprises the following steps: mixing the organic amine and the solvent, adding the metal oxide, heating the materials to the temperature of 90 DEG C, dropping the oxidizing agent so that the oxidizing agent and metal oxide are subjected to a reaction, controlling the reaction temperature at 90-120 DEG C; after the reaction is complete, and filtering a reaction solution to remove impurity to obtain the deactivator. The deactivator enables reasonable complex formulation of the components, antimony oxide is converted to pentavalent antimony under effect of hydrogen peroxide, and is simultaneously mixed with the organic amine and water, catalyst poisoning problem can be solved, hydrogen yield is reduced, light oil yield is increased, and the deactivator is suitable for a catalytic cracking apparatus with high residual oil-blending percentage.

The invention belongs to the technical field of preparation of rare metals, and specifically relates to a preparation method of low-antimony niobium oxide and the preparation method of low-antimony tantalum oxide. The preparation method comprises the following steps: firstly, converting positive pentavalent antimony in an antimony-containing niobium solution or an antimony-containing tantalum solution into positive trivalent antimony through reduction reaction, and then reacting with a complexing agent, thus generating a stable antimony complex; then, precipitating niobium or tantalum in a solution by utilizing neutralization reaction, and generating niobium hydroxide or tantalum hydroxide, wherein the antimony complex is not damaged and can exist in the solution, thus realizing efficientseparation of a niobium product or a tantalum product from antimony. According to the preparation method disclosed by the invention, antimony impurity in an antimony-containing solution can be efficiently removed, so that the niobium oxide or the tantalum oxide of which the antimony content is smaller than 20ppm can be obtained, the operation is simple, and industrial production is easy.

The invention discloses a catalytic-cracking metal passivator which is composed of the following components in parts by weight: 7-9 parts of organic acid, 22-27 parts of triethylamine, 140-160 parts of hydrogen peroxide, 135-160 parts of antimony trioxide, 30-40 parts of ammonium bicarbonate and 160-180 parts of water. According to a formula disclosed by the invention, the ammonium bicarbonate is used and is decomposed along with continuous temperature rise to generate gas, so that a reaction surface area is enlarged to make the antimony trioxide react fully and completely. The catalytic-cracking metal passivator disclosed by the invention is high in antimony content, and the pentavalent antimony passivator is low in viscosity, low in solidifying point, high in thermal decomposition temperature and good in stability, has an obvious effect on pollutant metallic nickel on a passivation catalyst in a catalytic cracking process, and has the antimony hanging rate far more than that of organic antimony and trivalent antimony passivators; and in addition, raw materials used according to the invention are low in toxicity and are free from harm to a human body, secondary pollution to the environment and adverse influences to products and subsequent processing of the products.

The invention discloses a formula and application of a working solution for electrokinetic remediation of antimony contaminated soil. In an electrokinetic remediation reactor, under the synergistic effect of ferrous ions or phosphate anions at the cathode, antimony replaced through the phosphate anions or original free state antimony or pentavalent antimony entering the anode working solution in an electromigration mode is reduced into trivalent antimony, and ferrous ions produced after anode potential electrochemical dissolution are purified or removed under a coprecipitation or flocculationeffect. By adopting the technical scheme, the formula and application of the working solution have the beneficial effects that the working solution formula is simple in raw material, good in treatingeffect, high in remediation speed and easy and convenient in operation, the formula is applied to electrokinetic remediation of the antimony contaminated soil, the remediation efficiency of the antimony contaminated soil is improved by 50%-100%, and the remediation speed is increased.

The invention discloses a method for adsorbing and removing chlorine from a strong acidic solution. The method comprises: contacting a chlorine-containing solution with an oxide of trivalent antimonyand a hydrate thereof, carrying out primary adsorption dechlorination, carrying out filtration to obtain a primary dechlorinated liquid and primary dechlorinated filter residues, adding an oxide containing pentavalent antimony and a hydrate thereof into the primary dechlorinated liquid, carrying out secondary dechlorination so that the remaining antimony and chlorine are converted into an oxide ofpentavalent or tetravalent antimony and oxychloride precipitates are precipitated, filtering the precipitates to obtain a secondary dechlorinated liquid and secondary dechlorinated filter residues, wherein the secondary dechlorinated liquid contains less than 0.25g/L of Cl and less than 0.03g/L of Sb, regenerating the dechlorinated filter residues through an alkali liquor and regenerating and recycling the dechlorinated filter residues through an alkali liquor containing an oxidizing agent. The method has the advantages of good dechlorination effects, cleaness, environmental friendliness, economical efficiency and high efficiency and is suitable for industrial application of strong acidic solution dechlorination.

The invention belongs to the field of germ gene engineering, and relates to function identification of an antimony oxidase gene in agrobacterium tumefaciens. By means of methods including gene knockout, antimony growth oxidation experiments, heterologous expression and the like, the antimony oxidase gene sboA derived from agrobacterium tumefaciens GW4 is separated and cloned; the nucleotide sequence of the gene is represented as SEQ ID NO:1, and the gene coded protein sequence is represented as SEQ ID NO:2; and the gene coded enzyme can catalyze trivalent antimony [Sb (III)] with strong toxicity to be oxidized into pentavalent antimony [Sb (V)] with weak toxicity, and has potential of application to environmental antimony pollution purification. The gene is contained in a prokaryotic expression vector, escherichia coli BL21/pET28a-sboA containing the plasmid is preserved in CCTCC (China Center for Type Culture Collection), and the preservation number is CCTCC NO: 2014437.

The invention discloses a method of recovering antimony from a pentavalent antimony water body by means of sulfide. The method comprises the following steps: reducing pentavalent antimony in the waterbody to trivalent antimony by means of hydration electrons; and converting trivalent antimony in the water body into an antimony sulfide precipitate by means of soluble sulfide to recover antimony inthe water body. By taking a reducing substance which is activated by light to generate the hydration electrons as a source of the hydration electrons, secondary pollution is little. The hydration electrons generated by being activated by light can reduce pentavalent antimony which is hard to remove in the water body into trivalent antimony which is relatively easily removed. The heavy metal antimony in the water body is separated and recovered from a water phase by a way of generating the precipitate further, so that the antimony is recycled, and therefore, the method is stable, reliable andgood in repeatability.

The preparation of chlorinated hydrocarbons, such as pentachloropropanes, such as 1,1,1,2,3-pentachloropropane, from tetrachloropropanes, such as 1,1,1,3-tetrachloropropane, in the presence of a polyvalent antimony compound that includes a pentavalent antimony compound, such as antimony pentachloride, is described. Also described are methods for preparing optionally chlorinated alkenes, such as, tetrachloropropenes, from chlorinated alkanes, such as pentachloropropanes, in the presence of polyvalent antimony compound that includes a pentavalent antimony compound, as well as methods for recovering polyvalent antimony compounds from such processes.

The invention belongs to the technical field of adsorption materials, and discloses a porous iron-manganese composite material for efficiently fixing and removing antimony pollution as well as a preparation method and application of the porous iron-manganese composite material. The method comprises the following steps: respectively preparing permanganate, manganese salt and ferric salt into a permanganate solution, a manganese salt solution and a ferric salt solution; dropwise adding the permanganate solution into the manganese salt solution, and stirring to obtain a suspension; adding an iron salt solution into the suspension, and stirring to obtain a mixed solution; and adjusting the pH value to 6.5-8.5, carrying out aging treatment, centrifuging to obtain precipitate, washing, drying, grinding and sieving to obtain the porous iron-manganese composite material for efficiently fixing and removing antimony pollution The material has the characteristics of being porous, high in specific surface area and stable in adsorption; and the porous iron-manganese composite material for efficiently fixing and removing antimony pollution can be used for treating trivalent antimony and pentavalent antimony pollution, and is high in removal rate and high in adsorption capacity. The method is simple, mild in reaction condition and low in energy consumption.

The invention provides a chemical detection method for the content of antimony trioxide, and relates to the field of tellurium content detection methods. The chemical detection method comprises the following steps: A, preparing raw materials; B, adding ammonium sulfite with a certain concentration into a beaker; C, heating the beaker filled with the mixture of antimony trioxide and ammonium sulfite until boiling, and then cooling the beaker; D, adding the ammonium sulfite solution into the beaker again, and cooling after heating; E, carrying out cooling and fixing the volume; F, dropwise adding a potassium permanganate standard solution into a volumetric flask; and G, calculating the content of antimony trioxide. According to the invention, a chemical redox reaction principle is utilized,the problem that the content of antimony trioxide cannot be autonomously detected in an original factory laboratory is solved, pentavalent antimony in antimony trioxide is reduced into trivalent antimony by utilizing the strong reducibility of ammonium nitrite, and therefore, the content of antimony trioxide is calculated. The whole experimental steps are simple, the authenticity and effectivenessof data are ensured, the detection cost is reduced, the working efficiency is improved, and the practicability is high.

The invention belongs to the technical field of environment biologics and discloses an efficient anaerobic antimony reduction bacterial strain and application thereof. The efficient anaerobic antimonyreduction bacterial strain is separated from soil of an antimony polluted region of the Lengshuijiang city in Hunan province in China, 16S#rDNA verification shows that the strain belongs to pelosinusfermentans, is named as Pelosinus fermentans Ti_20, and is preserved in the Guangdong Microbe Culture Collection Center, and the preservation number is GDMCC No:60921. The Pelosinus fermentans Ti_20not only has a capability of efficiently reducing pentavalent antimony, but also is capable of converting trivalent antimony at a reduction state into Sb2O3 precipitate, and biological mineralizationof antimony can be achieved. The strain has wide application prospects in environment repairing of an antimony polluted mine region. Formed antimonous oxide can be also used as a flame retardant withexcellent performance or an electrode replacement material of a lithium or sodium ion battery.

The invention discloses a method for measuring trivalent antimony and pentavalent antimony by a magnetic solid-phase extraction-ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method, which comprises the following steps: raw material preparation: obtaining an aqueous solution and raw materials, and synthesizing magnetic graphene oxide particles by a coprecipitation method; and adsorbing trivalent antimony: adjusting the pH value of the aqueous solution, and selectively adsorbing trivalent antimony by the magnetic graphene oxide. According to the method for measuring trivalent antimony and pentavalent antimony through the magnetic solid-phase extraction ICPMS method, magnetic particles and graphene oxide are compounded, magnetic graphene oxide is synthesized through a coprecipitation method, the solid-liquid separation capacity of the magnetic graphene oxide is improved, and the selective adsorption capacity of the magnetic graphene oxide to trivalent antimony is improved on the basis of the specific PH value; the concentrations of trivalent antimony and total antimony in the environmental water sample are detected by inductively coupled plasma mass spectrometry, the pentavalent concentration of the environmental water sample is calculated by using a subtraction method; and the method is quick, convenient, simple and feasible, and is suitable for quantitative determination of trivalent antimony and pentavalent antimony in the environmental water body.