36 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.

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.

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%.

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 LiX_x.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 LiX_x.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.

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 platinum(II) complex of formula (I),