199 results about "Oxyanion" patented technology

A light-weight, heat distortion resistant laminate includes at least one layer of an alkali silicate resin composition derived from an alkali silicate and / or alkali silicate precursor, at least one oxoanionic compound or a reactive acidic glass; and water; and at least one reinforcing core layer comprising an inorganic high-temperature resistant composition. The laminate has a very low quench steepness index value upon rapid quenching as with ambient temperature water.

The invention relates to a process for preparing an at least partially lithiated transition metal oxyanion-based lithium-ion reversible electrode material, which comprises providing a precursor of said lithium-ion reversible electrode material, heating said precursor, melting same at a temperature sufficient to produce a melt comprising an oxyanion containing liquid phase, cooling said melt under conditions to induce solidification thereof and obtain a solid electrode that is capable of reversible lithium ion deinsertion / insertion cycles for use in a lithium battery. The invention also relates to lithiated or partially lithiated oxyanion-based-lithium-ion reversible electrode materials obtained by the aforesaid process.

There is described a process for the transalkylation of a polycycloalkyl aromatic compound, particularly the transalkylation of dicyclohexylbenzene to produce monocyclohexylbenzene. The process comprises contacting the polycycloalkyl aromatic compound with benzene in the presence of a catalyst selected from the group consisting of an acidic solid comprising a Group IVB metal oxide modified with an oxyanion of a Group VIBA metal oxide, TEA-mordenite, zeolite beta and a porous crystalline material having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom. Preferably the catalyst is a WOx / ZrO2 material.

A laser-markable composition which comprises a binder and an oxyanion of a multivalent metal.

Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or supported on particulate solids having a cation exchange capacity less than 20 milliequivalents per 100 grams or (2) an aqueous solution of one or more soluble rare earth compounds.

The invention consists of a water treatment process using selective and regenerable weak base anion exchange resins to remove any number of complex anions, especially oxyanions including perchlorate, nitrate, chlorate, arsenate, selenate, and chromate, from aqueous solutions. The treatment process is comprised of three key processes including 1) pretreatment to lower pH, 2) ion exchange, and 3) post treatment to adjust pH and alkalinity. The invention also includes processes for regenerating weak base anion resins and treatment of the residuals generated. This invention employs pressurized treatment, carbon dioxide management, and reuse of regenerating solution to minimize pumping and treatment costs.

A carbonaceous material that has been loaded with at least one ionic organic species or hydroxide species and at least one metal or alkaline earth metal. The ionic organic species or hydroxide species is at least one selected from the group consisting-of: fatty acids, surfactants, organic carboxyl species, organic sulfonate species, organic hydroxyl species, organic phenolic species, organic lactone species, organic amine species, or hydroxide species.

The present invention relates to a method of preparing a molecularly imprinted polymer (MIP), which are used for the recognition of target molecules comprising: co-polymerising at least one functional monomer and at least one cross-linking monomer in the presence of at least one template, wherein oxyanions are used as template and the steric and / or electronic structure of the template is at least partly analogous to the target molecule. The target molecules may be nitro-containing compounds, such as nitroaromatic compounds, or lactones. MIPs selective for explosive nitro-aromatic substances may be produced without handling these hazardous compounds. The invention further relates to a method of determining if a sample contains nitro-containing compounds, such as nitroaromatic compounds, or lactones, MIPs selective for nitro-containing compounds and / or lactones, especially nitro-aromatic compounds and a kit, comprising a molecularly imprinted polymer selective for nitro-aromatic compounds and / or lactones. The invention also relates to use of isosteric and / or isoelectronic oxyanions for the production of MIPs for recognition of nitro-containing compounds, especially nitroaromatic compounds, and lactones.

Solid acid / surface-hydrogen-containing secondary component electrolyte composites, methods of synthesizing such materials, electrochemical device incorporating such materials, and uses of such materials in fuel cells, membrane reactors and hydrogen separations are provided. The stable electrolyte composite material comprises a solid acid component capable of undergoing rotational disorder of oxyanion groups and capable of extended operation at a wide temperature range and a secondary compound with surface hydrogen atoms, which when intimately mixed, results in a composite material with improved conductivity, mechanical and thermal properties, when compared to pure solid acid compound.

The invention relates to supported polyoxometalates represented by the formula (An)m+ [M4(H2O)10(XW9O33)2]m− or solvates thereof, wherein A represents a cation, n is the number of cations, m is the charge of the polyoxoanion, M is a transition metal, and X is an element selected from the group consisting of As, Sb, Bi, Se and Te, characterized in that the polyoxometalate is supported on a solid support selected from the group consisting of Al2O3, MgO, TiO2, ZrO2, SiO2, mesoporous silica, active carbon, diatomite, clays, zeolites, polyoxometalate salts and mixtures thereof, with the proviso that the polyoxometalate salt supports are different from the supported polyoxometalates defined by the above formula, a process for their preparation and their use for the catalytic oxidation of organic molecules.

An energy cell for producing electrical energy and a fuel being a mixture of hydrogen and oxygen from aqueous solutions of hydronium and oxyanions. The aqueous solution of hydronium ions is delivered to a cathode in a cathode compartment where the ions are reduced by contact with a precious metal cathode. The aqueous solution of oxyanions is delivered to an anode in an anode compartment where the ions are reduced by contact with a precious metal cathode. Electrical potential between anode and cathode is available as a source of electrical energy. Hydrogen from the cathode department and oxygen from the anode compartment are combusted to provide heat in a combustion compartment.

A laser-markable composition comprises a binder and an oxyanion of a multivalent metal.

A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.

Present invention deals with cost-effective surface-modified zeolite materials developed from commercial zeolites and flyash-based zeolites by treating with surface modifiers like hexadecyltrimethyl ammonium bromide (HDTMA-Br). The formation of zeolitic materials with anionic characteristics requires treatment with a surfactant with initial concentrations greater than its critical micelle concentration (CMC). The sorption of oxyanions on the surfactant-modified zeolite (SMZ) is attributed to surface complexation and surface precipitation. Incorporation of metal ions on SMZ showed improved anion uptake for dearsenification of water due to synergistic effects and is able to meet the stringent target of 10 ppb of As on potable water being adopted by most countries. High selectivity, faster kinetics and high adsorption capacity ensures cost effectiveness of this product as compared to other low-cost products for dearsenification. Zeolite analogues with anionic characteristics have been developed for their applications for removal of arsenic from water. The material developed can also be used to remove other anions like chromium and selenium.

Process for improving the electrochemical performance of an alkali metal oxyanion electrode material having a pyrolitic carbon deposit thereon, comprising a heat treatment under a humidified atmosphere where the heat treatment is performed at a temperature in the range of about 300° C. to about 950° C.

The invention discloses a new typed fluorescent probe and synthesizing method and application to detect hyperoxygen anion free radical in the cell selectively, which comprises the following steps: dissolving aromatic o-aminophenyl-sulfhydrate or aromatic o-aminophenyl-sulfhydrate derivant with weight rate at 1:2 -3.5 into composite solution with butanol and benzene with bulk rate at 1:0.3-0.6; heating the composite liquid to reflux 3-5h; decompressing to remove solvent; obtaining rough product; recrystallizing through alcohol; drying in the vacuum; obtaining pure product.

The invention relates to a fluorescent probe used for conducting linkage detection on superoxide anions (O2.-) and hydrogen polysulfide, in particular to a fluorophore derivative for detecting superoxide anions and hydrogen polysulfide and application thereof. The fluorophore derivative is shown in the general formula I. In the general formula I, R1 represents a C1-22 alkyl group or a halogenated benzyl group or C1-C12 organic acid ester chains; R2 represents hydrogen, a sulfonic group or an amino group or a carboxyl group or a nitro group or halogen; X (a positioning functional group) represents -OH, a butyl triphenyl phosphonium group, an N-propyl morpholino group, a biotin group, a folic acid group, a glycosyl chain group, benzyl chloride or a C1-22 alkyl group; Y1 represents N, O or S; Y2 represents N, O or S. In the presence of the superoxide anions (O2.-) and the hydrogen polysulfide, corresponding fluorescence emission wavelength and intensity change, and the fluorescent probe can be used for detecting the superoxide anions (O2.-) and the hydrogen polysulfide in organisms, interference of external detection conditions can be greatly reduced, the detection signal to noise ratio is high, and sensitivity and selectivity are good. The fluorophore derivative has important significance in biomedicine.

An metalloporphyrin-complex-embedded liposome, comprising a cationic metalloporphyrin complex and a lipid having liposome forming ability is disclosed. As metalloporphyrin-complex-embedded liposomes according to the present invention act on superoxide anion radicals (O2−), and can surely lower their concentration, they can exhibit superb effects for the treatment of cancers and have excellent characteristics as antioxidants.

A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.

A corrosion inhibitor is described which includes several supramolecular oxo-anion compositions useful for preventing the propagation of pit corrosion on aluminum and aluminum alloys. The oxo-anion compositions preferably include soluble polymeric oxidic acids comprising combinations of molybdenum, phosphorous, tungsten, and silicon. These compositions are useful as corrosion inhibitors in high-moisture, corrosive environments, such as radiators and cooling systems. For low-moisture environments, these oxo-anion compositions can be reacted with a counter-ion, such as various metals, including, but not limited to the rear earth metals, to form a soluble salt. The salt can then be adsorbed onto a carrier, such as paint pigments, which can then be applied to the surfaces of aluminum and aluminum alloys. These surface adsorbates then become sparingly soluble and are gradually released over time in the presence of an aqueous corrosive agent so as to prevent propagation of pit corrosion.

The invention relates to a method for directly preparing titanium and titanium alloy from titaniferous waste residues, and belongs to the technical field of electrochemical metallurgy. The method is characterized in that the titaniferous waste residues are made into an electrolysis electrode, and the electrolysis is performed in a crucible of an electrolytic cell by a solid oxygen permeable membrane in a specific molten salt electrolyte. The method comprises the following process steps: the titaniferous residues is processed by ball milling, then pressed and formed in a mould at 3-6MP, dried in the air, and then sinteredat the temperature of 1000-1100 DEG C for 2h to be made into an electrolysis cathode; molten salt is separated from an anode by an oxygen permeable membrane tube which only conducts oxyanion, the anode is liquid copper or copper alloy with saturated carbon powder, calcium chloride is taken as the molten salt electrolyte, the cathode and the anode are vertically arranged, the electrolytic temperature is 1000-1100 DEG C, the electrolytic voltage is 3.0-3.5V, the electrolysis time is 2-6h, and the cathodic products obtained by the electrolysis are metallic titanium and the titanium alloy. The method has the advantages of simple process, high electrolysis speed and high current efficiency.

Reactive oxygen species associated with a wound are modulated through treatment of the wound with a solution of metal ions selected from the group consisting of potassium ions, zinc ions, calcium ions and rubidium ions, at a pH of between about 5 and about 7. Preferably, citric acid is employed to adjust the pH of the solution. Application of the extract to a wound exhibiting superoxide anions has been found to be effective in the treatment of these wounds through the reduction of the level of superoxide anions. Moreover, treatment of partial thickness excision wounds as well as contact burn wounds with the present composition has been found to improve epithelialization of these wounds. In addition to the antioxidant activity of the present invention, treatment of the wound employing the present composition produces inhibitory effects on ROS production by human PMNs and on human complement activation, and therefore, is further beneficial in chronic wound management.

The present invention relates to a process for the preparation of iron oxide / iron oxyhydroxide-containing weakly basic anion exchangers prepared according to the phthalimide process and their use for removing oxo anions and their thio analogues, preferably of arsenic, from water and aqueous solutions and to a regeneration process.

A carbonaceous material that has been loaded with at least one ionic organic species or hydroxide species and at least one metal or alkaline earth metal. The ionic organic species or hydroxide species is at least one selected from the group consisting of: fatty acids, surfactants, organic carboxyl species, organic sulfonate species, organic hydroxyl species, organic phenolic species, organic lactone species, organic amine species, or hydroxide species.

The invention discloses a liposome-encapsulated organic-metal-framework nano medicine delivery system preparation method and application. An organic metal framework is MOF-Fe prepared from an iron compound and an organic ligand, is octahedral morphologically and has mimetic peroxidase catalytic activity. Water solubility can be improved by PEC modified liposome encapsulation, and dichloroacetic acid solution in pH of 4.0 is loaded into liposome to provide acidic catalytic reaction conditions for MOF-Fe, so that the liposome-encapsulated organic-metal-framework nano medicine delivery system isfinally formed. The medicine delivery system is characterized in that the particle size is about 150nm, spherical shape, high stability, high catalytic activity and slowness in release are realized, and hydroxyl radicals and superoxide anions are continuously generated through reaction with H2O2. Internal oxidative stress level of tumor cells can be raised, tumor cell apoptosis is induced, and remarkable suppression effects on tumor tissues are achieved. Therefore, a novel scheme is provided for antitumor treatment such as tumor non-chemotherapeutic pharmaceutical treatment and multi-drug resistance of tumors.