40 results about "Nitrate anion" patented technology

This invention relates to a Salen type ligand including three or more quaternary ammonium salts of nitrate anions, to a trivalent metal complex compound prepared from this ligand and a method of preparing the same, to a method of preparing polycarbonate by copolymerizing an epoxide compound and carbon dioxide using the complex compound as a catalyst, and to a method of separating and collecting the catalyst from the copolymer after copolymerization. This catalyst used to copolymerize an epoxide compound and carbon dioxide can be more simply prepared, and has lower catalyst preparation and recovery costs, and higher activity, compared to conventional catalysts.

Complex oxide catalysts represented by the formula,(in which A is Ni or Co; B is Na, K, Rb, Cs or Tl; C is an alkaline earth metal; D is P, Te, Sb, Sn, Ce, Pb, Nb, Mn, As, B or Zn; E is Si, Al, Ti or Zr; and where a is 12, 0<=b<=10, 0<c<=10, 0<d<=10, 2<=e<=15, 0<f<=10, 0<=g<=10, 0<=h<=4 and 0<=i<=30)are provided. The catalysts are characterized in that the molar ratio of the total nitrate anions to the molybdenum at the time of catalyst preparation is more than 1 but not more than 1.8. When used in the reaction for producing (meth)acrolein and (meth)acrylic acid by vapor-phase oxidation of at least a compound selected from propylene, isobutylene, t-butanol and methyl-t-butyl ether, the catalysts exhibit excellent activity and selectivity and maintain stable performance over prolonged period.

This invention relates to a Salen type ligand including three or more quaternary ammonium salts of nitrate anions, to a trivalent metal complex compound prepared from this ligand and a method of preparing the same, to a method of preparing polycarbonate by copolymerizing an epoxide compound and carbon dioxide using the complex compound as a catalyst, and to a method of separating and collecting the catalyst from the copolymer after copolymerization. This catalyst used to copolymerize an epoxide compound and carbon dioxide can be more simply prepared, and has lower catalyst preparation and recovery costs, and higher activity, compared to conventional catalysts.

Complex oxide catalysts represented by the formula,<paragraph lvl="0"><in-line-formula>MoaWbBicFedAeBfCgDhEiOx< / in-line-formula>(in which A is Ni or Co; B is Na, K, Rb, Cs or Tl; C is an alkaline earth metal; D is P, Te, Sb, Sn, Ce, Pb, Nb, Mn, As, B or Zn; E is Si, Al, Ti or Zr; and where a is 12, 0<=b<=10, 0<c<=10, 0<d<=10, 2<=e<=15, 0<f<=10, 0<=g<=10, 0<=h<=4 and 0<=i<=30) are provided. The catalysts are characterized in that the molar ratio of the total nitrate anions to the molybdenum at the time of catalyst preparation is more than 1 but not more than 1.8. When used in the reaction for producing (meth)acrolein and (meth)acrylic acid by vapor-phase oxidation of at least a compound selected from propylene, isobutylene, t-butanol and methyl-t-butyl ether, the catalysts exhibit excellent activity and selectivity and maintain stable performance over prolonged period.

The invention discloses the method for preparation of emulsified nanometer zero valence iron and nanometer bimetallic. The method comprises the following steps: 1 adding the NaBH4 solution into the mixture solution of FeSO4.7H2O and stabilizing agent which is amylogen, getting the emulsified nanometer zero valence iron, the density of amylogen being 0.2-2%, the mole ratio of NaBH4 and FeSO4.7H2O solution being 2:1; 2 mixing emulsified nanometer zero valence iron and K2PdCl6 solution, carrying out reaction, entering nitrogen, when the color of solution changed from bistre to pea green, getting the nanometer bimetallic, the proportion by weight of Pd and Fe being 5-10:10000. The emulsified nanometer zero valence iron and nanometer bimetallic are used to restore the pollution water containing chlorine, nitrate anion and heavy metal. The method is simple, the specific surface area of emulsified bimetallic particle is large, the dispersity is good, and the chemical reactivity is high.

The invention provides a method for regenerating with high efficiency a deteriorated catalyst of reduced activity, said catalyst originating from a heteropolyacid catalyst containing heteropolyacid formed of molybdophosphoric acid and / or molybdovanadophosphoric acid, or a salt thereof, to a heteropolyacid catalyst which exhibits approximately equivalent activity level to that of the fresh catalyst. Said method comprises mixing a deteriorated catalyst and a nitrogen-containing heterocyclic compound under the conditions whereunder ammonium ions and nitrate anions are present at such ratio that the amount of total ammonium ions per mol of total nitrate anions does not exceed 1.7 mols, drying the mixture and calcining the same.

A novel method for preparing a heteropolyacid catalyst containing a heteropolyacid composed of molybdophosphoric acid and / or molybdovanadophosphoric acid, or a salt of the heteropolyacid, is provided. The method comprises preparing an aqueous solution or aqueous dispersion which (1) contains the nitrogen-containing heterocyclic compound, nitrate anions and ammonium ions, (2) the ammonium ion content not exceeding 1.7 mols per mol of the nitrate anion content, and (3) the ammonium ion content not exceeding 10 mols per 12 mols of the molybdenum atom content by mixing raw materials containing the catalyst-constituting elements with the nitrogen-containing heterocyclic compound in the presence of water, drying and calcining the same. This heteropolyacid catalyst excels over conventional catalysts in performance, life and strength.

The invention discloses a thermal stable copper metal organic framework material and a preparation method and application thereof, and relates to the field of pyrrolidine catalysts. A catalyst is the thermal stable copper metal organic framework material, and the chemical formula of the thermal stable copper metal organic framework material is Cu(L)(NO3)2, wherein L represents a 2,3,5,6-tetrafluoro-1,4-bis(1,2,4-triazol-1-methyl)benzene ligand, and NO3 is nitrate anion. Cupric nitrate tetrahydrate and the organic ligand 2,3,5,6-tetrafluoro-1,4-bis(1,2,4-triazol-1-methyl)benzene are subjected to a hydrothermal reaction under an airtight condition, and the copper metal organic framework material with a two-dimensional layered structure is obtained. The synthetic method is high in yield and good in reproducibility; the obtained crystal is high in purity and thermal stability. The copper metal organic framework material has better catalytic activity on catalyzing of tetrahydrofuran gas phase amination, the conversion rate of tetrahydrofuran reaches 72%, and the selectivity of pyrrolidine reaches 90%.

Processes are disclosed for the microbial nitritation of ammonia that attenuate the production of at least one of nitrate anion and nitrous oxide. The processes use an ME biocatalyst having a highly porous, hydrophilic polymeric structure with ammonia-oxidizing microorganisms substantially irreversibly retained therein. The processes are particularly useful for integration with anammox processes.

The invention relates to purifying unwanted moderately saline water. The methods of the present invention including passing moderately saline water through an ion exchange media saturated with ammonium salts to produce fertilizer water. In addition, the present invention relates to a method of passing moderately saline water through a dual bed cation and anion exchange process for producing purified water. The first cation exchange media is saturated with acids of hydrochloric, nitric or sulfuric acids. Meanwhile, the second ion exchange media is saturated with ammonium hydroxide. Passing the moderately saline water through the first ion exchange media creates an acid rich water which is then passed through the second ion exchange media to remove chloride, sulfate, nitrate, and nitrite anions. Through a regenerative cycle, a fertilizer water is produced which is rich in ammonium chloride, ammonium nitrate or ammonium sulfate.

High capacity alkali metal / oxygen batteries, e.g. Li / O2 batteries, employing molten salt electrolytes comprising alkali metal cations and nitrate anions are disclosed. Batteries of the present invention operate at an intermediate temperature ranging from. 80° C. to 250° C. Molten alkali metal nitrate electrolytes employed in O2 electrodes within this temperature range provide alkali metal / oxygen batteries having significantly improved efficiency and rechargeability compared to prior art systems.

The present invention relates to the field of solid materials for adsorption of lithium. In particular, the present invention relates to a novel method for preparing a crystallized and shaped solid material, preferably as extrudates, of formula LiXx.2Al(OH)3, nH2O with n being comprised between 0.01 and 10, x being equal to 1 when X is an anion selected from among chloride, hydroxide and nitrate anions, and x being equal to 0.5 when X is an anion selected from among sulfate and carbonate anions, comprising a step a) for precipitation of boehmite under specific temperature and pH conditions, at least one shaping step, preferably by extrusion, said method also comprising a final hydrothermal treatment step, the whole giving the possibility of increasing the adsorption capacity for lithium as well as the adsorption kinetics of the materials obtained as compared with the materials of the prior art when the latter is used in a method for extracting the lithium from saline solutions.

Processes are disclosed for economically and effectively removing co-produced oxygenated organic compound from an anaerobic, aqueous fermentation broth used for the bioconversion of syngas to product oxygenated organic compound. Nitrate anion is added to the broth and the broth is contacted with denitrifying microorganisms that bioconvert the nitrate and organic compounds in the broth to reduced nitrogen compound and carbon dioxide.

The invention discloses a magnetic cobalt (II) complex based on a 4,4'-bipyridine-itaconic acid derivative ligand and a preparation method of the magnetic cobalt (II) complex. The molecular formula ofthe magnetic cobalt (II) complex is [[Co(HL)2(H2O)2].2NO3]n, wherein HL represents the 4,4'-bipyridine-itaconic acid derivative ligand with one hydrogen atom removed from carboxylic acid, a single-crystal structure has a one-dimensional chain structure, and an asymmetric construction unit of the single-crystal structure contains half cobalt (II) ion, one 4,4'-bipyridine-itaconic acid derivative ligand, one end coordination water molecule and one free nitrate anion; pyridine nitrogen in 4,4'-bipyridineis subjected to an electrophilic addition reaction with double bonds in itaconic acid, a semi-rigid carboxylate ligand containing N(+)-C bonds is synthesized, and the ligand and the cobalt (II) ion are subjected to an in-situ coordination reaction, and the cobalt (II) complex is synthesized;the cobalt (II) complex has slow magnetic relaxation phenomenon at the low temperature and serves as a molecule-based magnetic material to be applied to the fields of information storage, quantum computation and the like.

The present invention relates to the field of solid materials for the adsorption of lithium. In particular, the present invention relates to a new method for the preparation of a crystallized and shaped solid material, preferably in extruded form, of formula LiXx.2Al(OH)3,nH2O, wherein n is between 0.01 and 10, x is 1 when X is an anion selected from among chloride, hydroxide and nitrate anions, and x is 0.5 when X is an anion selected from among sulfate and carbonate anions, comprising a boehmite precipitation step a) under specific temperature and pH conditions, at least one basic mixing shaping step, wherein the method also comprises a final hydrothermal treatment step, all to increase the lithium adsorption capacity and the kinetics of adsorption of the materials obtained, compared with the materials of the prior art when it is used in a method for lithium extraction from saline solutions.

Ionic liquids comprising the association of a cation have the following formula (I), in which —R1 is an acyclic hydrocarbonated group, n is a whole number between 0 and 3, and m is a whole number between 1 and 4, and an anion selected from a nitrate anion, a phosphate anion or an imidide anion.

Processes are disclosed for economically and effectively removing co-produced oxygenated organic compound from an anaerobic, aqueous fermentation broth used for the bioconversion of syngas to product oxygenated organic compound. Nitrate anion is added to the broth and the broth is contacted with denitrifying microorganisms that bioconvert the nitrate and organic compounds in the broth to reduced nitrogen compound and carbon dioxide.

The invention relates to a composition comprising an ionic liquid consisting in the combination of a pyrrolidinium cation and a nitrate anion and comprising a solvent selected from lactone solvents, carbonate solvents, nitrile solvents and mixtures thereof. The composition may be used as an electrolyte, for example, for such applications as energy storage devices.

A process of isolating samarium from a hydrophilic composition comprises nitrate ions, europium and samarium, by reducing europium(III) to europium(II) in this hydrophilic composition, and by extracting the samarium with a water-immiscible organic phase comprising an ionic liquid comprising nitrate anions.

A method for removing an organic ligand from a surface of a particle including:obtaining a particle having an organic ligand disposed on a surface thereof;contacting the particle with an alkylammonium salt represented by Chemical Formula 1:NR′4+A−  Chemical Formula 1wherein groups R′ are the same or different and are each independently hydrogen or a C1 to C20 alkyl group, provided that at least one group R′ is an alkyl group, and A is a hydroxide anion, a halide anion, a borohydride anion, a nitrate anion, a phosphate anion, or a sulfate anion; andheat-treating the particle to carry out a reaction between the alkylammonium salt and the organic ligand.

The invention discloses a tetranuclear copper complex, a preparation method and application of the tetranuclear copper complex in gas-phase amination catalysis of tetrahydrofuran, and relates to the field of pyrrolidine catalysts.The chemical formula of the tetranuclear copper complex is [Cu(L)(ClO4)(H2O)](dioxane)1.5, wherein L represents a 2,3,5,6-tetrachloro-1,4-di(imidazole-1-carbonyl)benzene ligand, ClO4 represents a nitrate anion, and dioxane represents 1,4-dioxane.The copper complex with a tetranuclear cage-shaped structure is obtained by adopting copperperchlorate hydrate and the organic ligand 2,3,5,6-tetrachloro-1,4-di(imidazole-1-carbonyl)benzene in blend solvent of 1,4-dioxane and methyl alcohol under the closed condition through a thermal reaction.The tetranuclear copper complex is applied to ammoniation of tetrahydrofuran and ammonia to prepare pyrrolidine.Accordingly, the technological process is simple; a catalyst is convenient to prepare, and the reproducibility is good; the conversion rate of tetrahydrofuran reaches 83%, and the selectivity of pyrrolidine reaches 95%.

The invention discloses the method for preparation of emulsified nanometer zero valence iron and nanometer bimetallic. The method comprises the following steps: 1 adding the NaBH4 solution into the mixture solution of FeSO4.7H2O and stabilizing agent which is amylogen, getting the emulsified nanometer zero valence iron, the density of amylogen being 0.2-2%, the mole ratio of NaBH4 and FeSO4.7H2O solution being 2:1; 2 mixing emulsified nanometer zero valence iron and K2PdCl6 solution, carrying out reaction, entering nitrogen, when the color of solution changed from bistre to pea green, getting the nanometer bimetallic, the proportion by weight of Pd and Fe being 5-10:10000. The emulsified nanometer zero valence iron and nanometer bimetallic are used to restore the pollution water containing chlorine, nitrate anion and heavy metal. The method is simple, the specific surface area of emulsified bimetallic particle is large, the dispersity is good, and the chemical reactivity is high.

The invention provides an electrolyte additive and application thereof, the electrolyte additive comprises a pyrrolidine nitrate compound, and the pyrrolidine nitrate compound has a structure as shown in a formula I: # imgabs0 # formula I, wherein R1, R2, R3, R4, R5 and R6 are respectively and independently selected from one of hydrogen, halogen, linear alkyl, substituted linear alkyl, branched alkyl, substituted branched alkyl, alkoxy, substituted alkoxy, heterocyclic group, substituted heterocyclic group and the like. According to the electrolyte additive disclosed by the invention, the nitrate anions and the pyrrolidinyl cations are contained, and the nitrate anions can form SEI on a negative electrode to improve the stability of a negative electrode interface and enter a solvation structure of lithium ions in the electrolyte to reduce the desolvation energy of the lithium ions; meanwhile, nitrate ions and pyrrolidinyl cations both have excellent oxidation resistance and can be compatible with a high-voltage positive electrode, so that the fast charging performance of the battery is improved on the premise of not sacrificing the service life of the battery.

A platinum(II) complex of formula (I),or a pharmaceutically acceptable solvate or tautomer thereof, wherein R1 and R2 are each independently a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, or an optionally substituted aryl; or wherein R1 and R2 together form a five-, six-, or seven-membered ring with the nitrogen atoms to which they are attached; and X is a nitrate anion, a hexafluorophosphate anion, a hexafluoroantimonate anion, a trifluoromethanesulfonate anion, a tetrafluoroborate anion, a perchlorate anion, or a halide anion. A pharmaceutical composition containing the platinum(II) complex of formula (I), and a method of treating cancer are also disclosed.

The invention discloses a magnetic cobalt (II) complex based on a ligand derived from 4,4'-bipyridine-itaconic acid and a preparation method thereof. The molecular formula is {[Co(HL) 2 (H 2 O) 2 ]·2NO 3} n , HL represents a ligand derived from 4,4'-bipyridine-itaconic acid that removes a carboxylic acid hydrogen, the single crystal structure has a one-dimensional chain structure, and its asymmetric building block contains half a cobalt(II) ion, a 4,4'-bipyridine-itaconic acid-derived ligand, a terminal coordinated water molecule and a free nitrate anion; the pyridine nitrogen of 4,4'-bipyridine and the double bond in itaconic The addition reaction synthesizes a semi-rigid carboxylic acid ligand containing N(+)-C bonds, and the ligand reacts with cobalt(II) ions to form a cobalt(II) complex in situ; the cobalt(II) complex is in It has slow magnetic relaxation phenomenon at low temperature, and is used as a molecular-based magnetic material in information storage and quantum computing.

A method for manufacturing a composite of sodium-vanadium fluorophosphate with amorphous carbon, crystallizing in the NASICON structure, consisting in preparing a solid, homogeneous and stoichiometric mixture of precursors containing Na+, VO3-, PO43- and F- ions, and counterions undergoing decomposition into gaseous products at high temperature, which mixture is subjected to thermal treatment and subsequent homogenisation with a carbon material, characterized in that the solid homogeneous mixture of precursors, additionally containing an oxidizer and a fuel, is subjected to self-combustion, and the obtained material is subjected to grinding with amorphous carbon with subsequent thermal treatment, wherein: an oxidizer solution is prepared containing NH4F, (NH4)2HPO4 and NaNO3 in a 3:2:3 molar ratio in deionized water in a PTFE beaker, with nitrate anions as the oxidizer, and a fuel solution is prepared containing NH4VO3 and citric acid in a 3:2 molar ratio in deionized water in a glass beaker, with citric acid as the fuel, and after which the oxidizer solution and the fuel solution are simultaneously stirred and heated at temperature of 80°C until the fuel solution turns blue, at which time the fuel solution is added drop by drop to the oxidizer solution with continuous stirring, maintaining a 1:1 molar ratio of NH4VO3 to (NH4)2HPO4, and then the resulting solution is heated at temperature of 80°C until the solvent is completely evaporated, and the resulting precipitate is heated to a temperature of 150°C until it spontaneously ignites, wherein the green powder obtained after the combustion process is dried in a vacuum at a temperature of 120°C for 12 hours, and the dried material is ground with amorphous carbon in a mass ratio of 1:14 in a ball mill at 500 rpm for 5 hours, and the grinding product is subjected to heat treatment in a tube furnace in an inert atmosphere at a temperature of 300°C for 4 hours and then at a temperature of 550°C for 8 hours, as a result of which a composite material is obtained containing crystallographically pure, single-phase sodium-vanadium fluorophosphate, the crystallites of which are covered with amorphous carbon, forming composite particles with a size of 50-200 nm, wherein the carbon coating has a thickness in the range of 2-20 nm. The sodium-vanadium fluorophosphate-amorphous carbon composite obtained by the method of the invention is phase-pure and has a uniform morphology. The self-combustion method allows for obtaining a powder with excellent properties for use in sodium-ion systems, demonstrating high specific capacity and excellent cyclicity.

A polyetherimide composition includes a polyetherimide and two or more of a residual metal content, a sulfate anion, a phosphate anion, a nitrite anion, a nitrate anion, or a combination including at least one of the foregoing, a residual solvent content, a phosphorus-containing stabilizer, and alkali metal halide, alkaline earth metal halide, alkali metal carbonate, or a combination including at least one of the foregoing, wherein each of the aforementioned components, when present, is included in the composition in a particular amount. The resulting polyetherimide composition exhibits two or more useful properties. The polyetherimide composition can optionally further be combined with a polymer different from the polyetherimide to provide a thermoplastic composition. Methods of making the polyetherimide composition and articles including the polyetherimide composition are also described.

The invention discloses the method of end-alkynes coupling, using end-alkynes as raw material, and using hydrotalcite as accelerating agent. The accelerating agent uses double hydroxy compound of divalent transient metal ion and tervalent transient metal ion as plywood, and uses carbonate or nitrate anion as layer-to-layer negative ion. The reaction condition is normal temperature and normal pressure, the product is 1, 3-alkynyl compound, and the divalent transient metal positive ion possesses the particular accelerating effect. The method has the advantages of good catalytic activity, short reaction time, mild reaction condition, simple operation, low cost and no environmental pollution.