95 results about "MOLYBDATE ION" patented technology

The invention discloses a treating agent of cooling water and composite water in central air-conditioning, including the weight or portioning components listed as following: one to ten portion of epoxy succinic acid; one to ten portion of phosphonate; one to ten portion of molybdate calculated according to molybdic acid ion; 0.1 to ten portion of rare-earth element salts; one to five portion of copper inhibitor; zero to three portion of zinc calculated according to zinc ion. This invention is low-phosphorus and environment-friendly type, good quality in antisludging and corrosion inhibit, easy to obtain material, explore the application area of using rare-earth element in water treatment, and have greatly active meaning in developing rare earth project of our country.

The present invention comprises a one-step method of etching and desmutting aluminum and its alloys. The method comprises exposing articles made of aluminum and its alloys to a liquid etching/desmutting composition. The liquid composition comprises water and an acid source comprising sulfuric acid and nitric acid, a non-fluorine etchant source comprising phosphoric acid, and a stabilized oxidant. A particularly preferred liquid composition suitable for the etching and simultaneous desmutting of aluminum and aluminum alloys, comprises water and diluted sulphuric acid, nitric acid, phosphoric acid, molybdate and/or condensed molybdate ions, a perfluoroalkyl sulfonate, and aluminum sulfate.

A chromium-free aqueous treatment solution for coating metal surfaces is described. The treatment solution contains fluorocomplex ions of titanium and/or zirconium and molybdate ions, vanadium ions and one or more aromatic carboxylic acids with at least one carboxyl groups and at least two further functional groups, wherein the two further functional groups are selected from the group comprising carboxyl groups, hydroxyl groups, amino groups and nitro groups.

The invention belongs to the technical field of biological engineering, and relates to a culture medium for the spore germination and seedling culturing of pteridophyte, which is characterized by consisting of the following nutritional components: 2 to 60 mmol.L<-1> nitrate ions, 1 to 30 mmol.L<-1> ammonium ions, 0.3 to 8 mmol.L<-1> phosphate radical ions, 2.7 to 66 mmol.L<-1> potassium ions, 0.37 to 12.0 mmol.L<-1> calcium ions, 0.18 to 1.8 mmol.L<-1> magnesium ions, 0.173 to 1.73 mmol.L<-1> sulfate ions, 10 to 100 mumol.L<-1> chelated ferric salt or chelated ferrous salt, 10 to 200 mumol.L<-1> boric acid, 10 to 100 mumol.L<-1> divalent manganese ions, 3 to 30 mumol.L<-1> zinc ions, 0.5 to 8 mumol.L<-1> divalent copper ions or complexes thereof, 0.1 to 1 mumol.L<-1> molybdate ions, 0.01 to 0.1 mumol.L<-1> divalent cobalt ions, 0.05 to 12 mumol.L<-1> chloride ions, 0.3 to 30 mumol.L<-1> thiamine hydrochloride and the balance of water, wherein the pH value of the culture medium is between 4.0 and 9.0. The culture medium can improve the germination rate of spores.

The invention discloses a treating agent of cooling water and composite water in industrial cycle, including the weight or portioning components listed as following: one to ten portion of phosphoric carboxylate copolymerisate; one to ten portion of molybdate calculated according to molybdic acid ion; 0.1 to ten portion of rare-earth element salts; one to five portion of copper inhibitor; zero to five portion of zinc calculated according to zinc ion. This invention is low-phosphorus and environment-friendly type, good quality in antisludging and corrosion inhibit, especially suitable for the harsh water quality of large hard value, large basic value, large PH value, large suspended matter value, and easy to obtain material, explore the application area of using rare-earth element in water treatment, and have greatly active meaning in developing rare earth project of our country.

The invention relates to a method for modifying a titanium-dioxide lithium-ion battery negative pole material simultaneously by using carbon and monolayer molybdenum disulfide. According to the method, a composite material adopts TiO2 as a skeleton, fluoride ions of the surface of the composite material adsorb glucose molecules in a suspension firstly, functional groups in the glucose molecules adsorb molybdate ions and thiourea molecules, an outer layer of each titanium dioxide nanosheet is coated with a glucose membrane and a sodium molybdate-thiourea membrane after freeze drying, glucose is carbonized into amorphous carbon after a chemical vapor deposition process, and meanwhile, thiourea is subjected to high-temperature decomposition so as to prepare hydrogen sulfide and reduce the molybdate ions into molybdenum disulfide, thereby obtaining TiO2 nanosheets which are simultaneously modified by carbon and monolayer molybdenum disulfide nanosheets. The prepared negative pole material has a uniformly-coated structure, all components are in close contact, and the agglomeration of MoS2 nanosheets is effectively inhibited; when the prepared negative pole material is applied to negative pole materials of lithium-ion batteries, the lithium-ion batteries have relatively high specific capacity and stable cycle performance.

The invention discloses a method for preparing a porous defect-enriched molybdenum disulfide, and is characterized in that the method comprises the steps: adding a soluble acid or a soluble salt in an aqueous solution of molybdate, then heating, and making molybdate ions subjected to stepwise polymerization into porous heterozygous ordered aggregates under induction of cation; and centrifuging, washing and drying the product, transferring the product to a reactor kettle, taking a compound containing negative bivalent sulfur elements as a sulfur source, and thus obtaining the porous defect-enriched molybdenum disulfide through a hydrothermal-gas phase in-situ vulcanization method. The method has the advantages of simple operation, and cheap and easily obtained raw materials, and the obtained product has the advantages of good morphology and large specific surface area, and can be used for large-scale synthesis.

The inventions aims to provide a cultivation system for improving concentration of alcohol substances in a fermented product of anaerobic gas-feeding microbes, specifically for improving the concentration of the alcohol substances in the fermented product of the anaerobic gas-feeding microbes in a shaking cultivation or continuous air agitation cultivation system by optimizing components in a cultivation medium. A method for improving the fermentation efficiency of the anaerobic gas-feeding microbes is characterized in that the final concentration of molybdate ions in the cultivation medium for fermentation is not higher than 0.1mg/L. By the method, the concentration of alcohols in the fermented product of gas biotransformation can be improved and the value of the bio-fermentation production of gas can be improved effectively.

The invention discloses a method for separating tungsten and molybdenum from a tungsten and molybdenum acid salt solution. The method comprises the steps that quaternary ammonium salt is added in thetungsten and molybdenum acid salt solution to serve as a stabilizer, the pH value is adjusted to be 8-11, then, divalent manganese salt is added to serve as a precipitator, and solid-liquid separationis conducted after the reaction. Through introduction of the stabilizer, the function of stabilizing molybdenum acid radical ions in the tungsten and molybdenum acid salt solution can be achieved, the efficiency of the precipitator is improved, and then the tungsten and molybdenum separation efficiency is improved; in the process of selective separation of tungsten through introduction of the stabilizer and the precipitator, toxic and harmful gas generation is avoided, the raw material cost is low, the operation environment is good, the equipment requirement is low, and industrial achieving is easy; and the conditions of the tungsten and molybdenum separating process are moderate, usage of strong acid, strong base, high temperature and high pressure is avoided, and compared with a traditional method, the reaction time is shortened, energy consumption is reduced, economic benefits are high, and the actual application prospects are good.

The invention discloses a method for deeply purifying ammonium tungstate solution. The method comprises the following steps: adding excessive (NH4)2S into a coarsely treated ammonium tungstate solution under a stirring condition until S2<-> reaches a set concentration, and then carrying out vulcanization reaction at a set temperature, so that molybdenum in the ammonium tungstate solution is converted into thiomolybdate ions (MoS42 <->) to obtain a vulcanized ammonium tungstate solution; adding a calcium agent into the vulcanized ammonium tungstate solution under a stirring condition, and thencarrying out stirring reaction under a set condition, so as to obtain calcium tungstate precipitate and a mother liquor containing ammonia water after the reaction is finished; adding the calcium tungstate precipitate into a hydrochloric acid solution at a set temperature under a stirring condition, carrying out heat preservation and stirring reaction, and filtering after the reaction is finished,so as to obtain refined tungstic acid and an acid decomposition mother liquor; cleaning the refined tungstic acid, putting the cleaned tungstic acid into ammonia water for ammonia dissolution, and filtering to obtain ammonia dissolution slag and an ammonium tungstate deep purification liquid.

The invention discloses a preparation method of molybdenum-tungsten alloy powder. The method comprises the steps that firstly, molybdenum trioxide and tungstic acid are added into diluted ammonia water to be dissolved to obtain an ammonium molybdate and ammonium tungstate mixed solution; secondly, the ammonium molybdate and ammonium tungstate mixed solution is sprayed and dried to obtain a molybdenum-tungsten composite oxide precursor; thirdly, the molybdenum-tungsten composite oxide precursor is subjected to roasting decomposition under the temperature gradient condition to obtain a molybdenum-tungsten composite oxide; fourthly, the molybdenum-tungsten composite oxide is subjected to first-stage reduction under the hydrogen condition to obtain a molybdenum-tungsten low-valence oxide; andfifthly, the molybdenum-tungsten low-valence oxide is subjected to second-stage reduction under the hydrogen condition to obtain the molybdenum-tungsten alloy powder. The molybdenum-tungsten alloy powder is prepared by fully mixing molybdate ions and tungstate ions and conducting roasting and reduction, so that size and mass differences of molybdenum particles and tungsten particles are small, hybrid power is high, the uniformity of the molybdenum-tungsten alloy powder is improved, and the problem of insufficient uniformity caused by mechanical mixing of molybdenum powder and tungsten powder is eliminated.

The invention provides a method for preparing an all-vanadium-redox-flow-battery electrode material. The method includes the following steps that a carbon base material is soaked into an acid solution containing molybdate anions and fully dispersed; heating is carried out; the carbon base material is taken out and dried in the vacuum or inert atmosphere; the dried carbon base material is put in the inert atmosphere and subjected to an isothermal reaction, and the all-vanadium-redox-flow-battery electrode material with the surface modified with molybdenum trioxide is obtained. The all-vanadium-redox-flow-battery electrode material comprises the carbon base material and an electrocatalyst which is combined on the surface of the carbon base material and contains the molybdenum trioxide. According to method, as the electrocatalyst containing the molybdenum trioxide is arranged on the surface of the carbon base material for modification, the carbon base material has the high catalytic activity, the electro-catalysis activity of the electrode material is improved, electrochemical polarization is reduced, and the voltage efficiency and the energy efficiency of a vanadium battery are improved; the method is simple, and the cost is low.

The present invention relates to a kind of molybdate radical ion and nitrite radical ion concentration test card and its preparation process. The test card includes test paper and standard color check card, and the test paper has molybdate radical ion indicating color developing paper sheet and nitrite radical ion indicating color developing paper sheet fixed on the base sheet. The molybdate radical ion indicating color developing paper sheet is prepared through soaking filter paper in mixed solution of gallic acid and hydroxylamine sulfate, drying and photophobic keeping; and the nitrite radical ion indicating color developing paper sheet is prepared through soaking filter paper in mixed solution ofaminobenzene sulfonic acid, dihydrochloride-1-naphthyl ethylene diamine and tartaric acid, drying and photophobic keeping. The present invention may be used in testing the concentration of molybdate radical ion and nitrite radical ion simultaneously.

The invention relates to a preparation method of biomass Fe-based porous carbon composite adsorption material. Palm fibers are used as raw materials, and the method comprises the following steps: 1, palm fibers are washed, and dried at 50-80 DEG C and cut up; 2. palm fibers are placed in a sodium hydroxide solution, stirring and filtering are carried out, washing is carried out till pH value is neutral, and then drying is carried out; 3. preoxidation treatment of the palm fibers are carried out 200-400 DEG C under air atmosphere for 1-5 hours, cooling is carried out till the temperature is ata room temperature, heating rate is 1-5 DEG C/min, heating is carried out till the temperature is at 600-1200 DEG C, constant temperature treatment is carried out at 60-240 minutes, finally cooling rate is controlled at 2-10 DEG C/min and the materials are cooled to a room temperature and taken out, and the materials are immersed in a solution of ferric salt; after the immersion ends, filtering iscarried out, and then under protection of nitrogen, heating rate is 1-5 DEG C/min, heating is carried out till the temperature is at 500-800 DEG C, constant temperature treatment is carried out at 30-240 minutes, and finally the cooling rate is controlled at 2-10 DEG C/min, cooling is carried out till the temperature is at room temperature, and the composite adsorption material is obtained. The removal rate of adsorption materials for molybdate ions reaches 95% or above in a wider pH value range.

The invention relates to a method for removing arsenic from a nickel sulfate solution, in particular to a method for removing arsenic in an industrial nickel sulfate solution by means of modified large-aperture anion resin. The method comprises the following steps that Cl<-> type large-aperture anion resin is converted into OH<-> type large-aperture anion resin, and then OH<-> type large-aperture anion resin is converted into WO4<2-> type or MoO4<2-> type large-aperture anion resin; the nickel sulfate solution passes through a WO4<2-> type or MoO4<2-> type resin column, and the purpose of removing arsenic is achieved by utilizing functional groups (WO4<2-> or MoO4<2->) on the resin and pentavalent arsenic in the solution to form heteropolyacid; according to the resin achieving adsorption, adsorbed arsenic is washed with dilute sulfuric acid, the resin is washed to be neutral with distilled water, desorption is conducted with a low-concentration mixed solution of sodium hydroxide and sodium sulfide, the resin is washed to be neutral, and then resin regeneration is achieved. According to the method for removing arsenic from the nickel sulfate solution, raw materials used in the whole process can be recycled, losses of tungstate and molybdate ions do not exist, and the arsenic content of the finally obtained exchanged solution is below 0.5 ppm and completely meets the industrial production requirement.

A method and an apparatus are provided for measuring trace ingredients in water, which make it possible to perform detection and quantitative determination of silica, phosphorus or arsenic in a sample solution. The method includes adding a molybdate ion to a sample solution under an acidic condition, then adding a fluorescent counter cationic pigment thereto, and measuring the time required for the fluorescence emitted by the resultant solution to be attenuated to a prescribed intensity. The measuring apparatus includes an excitation light source which irradiates excitation light to the above-modified solution; a fluorescence detector which detects the fluorescence emitted by the solution; means for measuring the time required for the fluorescence detected by the fluorescence detector to be attenuated to a prescribed intensity; and control means for determining the concentration of silica, phosphorus or arsenic in the sample solution from the time measurement.

The invention discloses a fluorescence probe for recognizing molybdate and a production method and a recognition method thereof. The production method of the fluorescence probe comprises the steps of(1) adding 1,4-dibromonaphthalene, 4-vinyl pyridine, palladium dichloride, triphenylphosphine and potassium carbonate into triethylamine for mixing, sealing a mixture in a high-pressure reaction bottle in a N2 atmosphere, carrying out reaction at 110-120 DEG C for 24-36 h, extracting a product by using dichloromethane and a saturated salt solution, then conducting spin dry, conducting recrystallization by means of ethyl alcohol, and then conducting filtering and drying to obtain a product A; and (2) dissolving the product A in N,N-dimethylformamide, then adding 1-bromooctane, heating a mixtureto 80-90 DEG C, carrying out reaction for 20-24 h, then adding diethyl ether until a mixture completely participates, conducting suction filtering, washing a participate twice with diethyl ether, andconducting drying to obtain the probe. By means of the fluorescence probe for recognizing the molybdate and the production method and the recognition method thereof, the molybdate can be recognized,and the fluorescence probe for recognizing the molybdate and the production method and the recognition method thereof have the characters that the recognition cost is low, operation is simple, a result is visible, the sensibility is high, and the selectivity is good.

Heat transfer fluid concentrates include: a freezing point depressant, water, or a combination thereof; an organophosphate; a carboxylic acid or a salt thereof; and a component selected from the groupconsisting of an alkaline earth metal ion, an alkali metal ion, a transition metal ion, an inorganic phosphate, molybdate ion, nitrate ion, nitrite ion, an azole compound, a copper and copper alloy corrosion inhibitor, a silicate, a silicate stabilizer, a water-soluble polymer, and combinations thereof. Ready-to-use heat transfer fluids and methods for preventing corrosion in heat transfer systems are described.

The invention discloses a high-fluidity antibacterial halogen-free flame retardant composite material. The composite material comprises polypropylene, halogen-free flame retardants, modified hydrotalcite, antioxidants, lubricating agents, anti-dripping agents, titanium dioxide and antibacterial agents. The composite material has a higher melt flow index, a hydrotalcite precursor and silver nitrateare mixed and calcined, molybdate is added into mixture to prepare the modified hydrotalcite, the modified hydrotalcite is added, so that multiple performances are provided, flame-retardant efficiency can be improved, flame-retardant level reaches UL94 1.6 V-0, and high antibacterial action can be achieved under less antibacterial agents. Molybdic acid ions are introduced between hydrotalcite layers, so that the composite material has a smoke suppression function.

The invention discloses a treating agent of cooling water and composite water in central air-conditioning, including the weight or portioning components listed as following: one to ten portion of organic phosphinic acid compounds; one to ten portion of molybdate calculated according to molybdic acid ion; 0.1 to ten portion of rare-earth element salts; one to five portion of copper inhibitor; zero to two portion of zinc calculated according to zinc ion. This invention is low-phosphorus and environment-friendly type, good quality in antisludging and corrosion inhibit, easy to obtain material, explore the application area of using rare-earth element in water treatment, and have greatly active meaning in developing rare earth project of our country.

The invention discloses a method of extractively separating molybdenum from a tungstate solution. The method includes steps of: adding tripolythiocyanic acid (also called as 2,4,6-trithio-S-triazine,TTCA) to a molybdenum-containing tungstate solution to perform a sulfuration reaction to obtain a mixed solution; performing extraction separation to the mixed solution with an organic phase containing a primary amine extract agent; washing the organic phase supporting molybdenum, and performing reverse extraction separation with an alkaline solution to obtain the tungstate solution. The method can high-effectively separate the tungsten and molybdenum and directly prepare high-purity tungstate solution and molybdate solution; in addition, the sulfuration reaction is carried out with the tripolythiocyanic acid and is free of release of harmful gas, such as H2S, so that the method is safe and environment-friendly. The sulfuration product is easy to subject the extraction and reverse extraction. The reverse extraction separation is free of an oxidant, so that a problem that reverse extraction is difficult after extraction by quaternary ammonium salt is carried out to MoS2-4 generated by sulfurating the molybdate ions by a common sulfuration agent can be solved.