931 results about "Tetrafluoroborate" patented technology

An electrical double-layer capacitor showing a sleight increase of resistance when used under continuous application of high voltage and maintaining high energy residual ratio after standing for a long time includes an electrode element including a pair of electrodes disposed opposite to each other with a separator interposed therebetween, and is impregnated with a nonaqueous electrolyte solution prepared by dissolving quaternary ammonium salts into cyclic carbonates and containing impurities of 30 ppm or less of glycols, 30 ppm or less of primary alcohols and less than 20 ppm of tertiary amines. The water content may be 50 ppm or less. The quaternary ammonium salt may be triethylmethylammonium tetrafluoroborate. The cyclic carbonate may be propylene carbonate. The nonaqueous electrolyte solution may have a concentration of 0.1 to 2.5 mol/liter. The electrode may be a polarizable electrode composed of activated carbon.

Electrolyte for use in an energy storage device such as a capacitor or supercapacitor which comprises a solvent (preferably propionitrile) and an ionic species (preferably methyltriethylammonium tetrafluoroborate). The electrolytes provide a low ESR rise rate, a high voltage and permit operation over a wide range of temperatures, which makes them beneficil for use in a range of energy storage devices such as digital wireless devices, wireless LAN devices, mobile telephones, computers, electrical or hybrid electrical vehicles.

The invention discloses a tetravalent platinum complex with a bioactive group and a preparation method of the tetravalent platinum complex. The tetravalent platinum complex is a platinum (IV) complex and has the structure shown in the formula II (please see the formula in the description), wherein in the formula II, Y is OH or Cl, and Bio represents the bioactive group. The platinum (IV) complex is prepared according to the equation in the formula III (please see the formula in the description), wherein in the formula III, Y is OH or Cl, Bio-OH represents a compound with bioactivity, TBTU represents a coupling agent O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate, TEA represents a catalyst triethylamine, DMF represents solvent N,N-dimethyl formamide, and DMSO represents solvent dimethylsulfoxide. Cis-platinum is adopted for the bottom face of an octahedron, a small-molecular targeted or medicine active group is introduced to one axial position, a hydroxyl group or helium atom is introduced into another axial position, and the anti-tumor tetravalent platinum complex overcoming cisplatin resistance is provided, so the high-efficiency and low-toxin platinum (IV) complex is obtained.

The invention discloses an ionic liquid mixed electrolyte for a lithium ion battery. The ionic liquid mixed electrolyte comprises lithium salt, ionic liquid and a non-aqueous organic solvent, wherein the lithium salt is one or mixture of two of lithium bis borate and lithium difluoroborate; cations in the ionic liquid are selected from one of imidazole cations, piperidine cations, pyridine cations, pyrrole cations, quaternary ammonium cations and quaternary phosphine cations; anions in the ionic liquid are selected from one of tetrafluoroborate radicals, hexafluorophate radicals, difluorosulfimide anions and diperfluoroalkylsulfimide anions; and the non-aqueous organic solvent is selected from any one or mixture of several of linear carbonate, cyclic carbonate, linear ether and cyclic ether. The ionic liquid mixed electrolyte is high in thermal stability, wide for an electrochemical stability window, high in conductivity, low in viscosity and good in compatibility with an anode material and a cathode material of the lithium ion battery at the same time.

A boriding agent for generating boride layers on metallic workpieces, containing boron-releasing substances, activating substances and, in the remainder, refractory, inert extender. The activating substance is a combination of 1 to 5 wt. % potassium tetrafluoroborate and 5 to 40 wt. % calcium fluoride, relative to the total quantity of the boriding agent. With this boriding agent it is possible for single-phase, Fe2B-containing boride layers to be generated on workpieces made of ferrous materials. The agent results in lower emissions of fluorine and fluoride.

Double-layer capacitors capable of operating at extremely low temperatures (e.g., as low as −75° C.) are disclosed. Electrolyte solutions combining a base solvent (e.g., acetonitrile) and a cosolvent are employed to lower the melting point of the base electrolyte. Example cosolvents include methyl formate, ethyl acetate, methyl acetate, propionitrile, butyronitrile, and 1,3-dioxolane. An optimized concentration (e.g., 0.10 M to 0.75 M) of salt, such as tetraethylammonium tetrafluoroborate, is disolved into the electrolyte solution. In some cases (e.g., 1,3-dioxolane cosolvent) additives, such as 2% by volume triethylamine, may be included in the solvent mixture to prevent polymerization of the solution. Conventional device form factors and structural elements (e.g., porous carbon electrodes and a polyethylene separator) may be employed.

Disclosed is a supported catalyst mainly containing sulfonated triphenylphosphine- rhodium complex and is used for preparing aldehyde by hydroformylation of olefin, and relates to an ionic liquid catalyst. It contains solid oxide, sulfonated triphenylphosphine- rhodium complex, sulfonated triphenylphosphine ligand and ionic liquid. The solid oxide is one from hole molecular sieve, SiO2, TiO2, gamma- Al2O3; sulfonated triphenylphosphine- rhodium complex is single-sulfonated triphenylphosphine- rhodium complex, di- sulfonated triphenylphosphine- rhodium complex and tri- sulfonated triphenylphosphine- rhodium complex; and the ionic liquid is 1, 1, 3, 3, - tetramethyl guanidine lactate, 1- butyl- 3- methyl imidazolium tetrafluorborate and 1- butyl- 3- methyl imidazolium hexafluorophosphate. By mass ratio, the solid oxide is among 50%- 90%, the ionic liquid 8%- 49%, and rhodium 0.05%- 2%, and by molecular ratio phosphine to rhodium is 3- 200.

An ionic liquid having high electrochemical stability and a low melting point. An ionic liquid represented by the following general formula (G0) is provided.

In the general formula (G0), R⁰ to R⁵ are individually any of an alkyl group having 1 to 20 carbon atoms, a methoxy group, a methoxymethyl group, a methoxyethyl group, and a hydrogen atom, and A⁻ is a univalent imide-based anion, a univalent methide-based anion, a perfluoroalkyl sulfonic acid anion, tetrafluoroborate, or hexafluorophosphate.

The invention discloses a benzotriazole group-containing ionic liquid and its preparation method and use. The benzotriazole group-containing ionic liquid is characterized in that cations are imidazolium cations; anions are hexafluorophosphate radical, tetrafluoroborate radical or bis(trifluoromethylsulfonyl)imide anions; and an imidazole ring-substituted end group contains a benzotriazole group. The benzotriazole group-containing ionic liquid can be used as a lubricant additive or a lubricating grease additive.

The invention relates to ionic liquid for assisting oil-sand separation and a separation method. According to the separation method, the ionic liquid is 1-ethyl-3-methylimidazole tetrafluoroborate; the range of the mass of added ionic liquid is 1-5 times of the mass of oil sand, and the ratio of the volume of an organic solvent to the mass of the oil sand is 1-12 ml/g so as to extract asphalt; the organic solvent and the ionic liquid simultaneously enter an extraction device so as to carry out extraction separation on the oil sand, and the asphalt separation is carried out under a temperature range of 15-60 DEG C; the organic solvent is collected through distilling at a temperature of 70-200 DEG C, and the rest organic product after distilling is an asphalt product; the residual sand and the ionic liquid are subjected to water cleaning by a small amount of water after oil-sand separation, the residual sand product is cleanly discharged; and the ionic liquid and the water can be recycled through fractionation by distillation. The residual sand and the ionic liquid are cleaned by the small amount of water after the oil-sand separation, thus, water is saved, and further, the loss of ionic liquid reagents is little; and in addition, the assisting separation method has high efficiency for the recovery of the asphalt which can reach 95%, and the residual organic matters in the oil sand is little.

Carbon electrodes for a capacitor having conditioned carbon elements in combination with a high concentration of an electrolyte tetrafluoroborate salt and a non-aqueous aprotic solvent to provide an operational voltage up to 4.5V and capacitors used with the carbon electrodes.

The invention relates to drilling fluid containing 0.02-0.08% by weight of ionic liquid 1-alkyl-3-methylimidazol tetrafluoroborate, 0.1-0.5% by weight of polymers, 1-6% by weight of bentonite and the balance of aqueous solution, wherein the polymers are selected from one or more of partially hydrolyzed polyacrylamide, high-viscosity sodium carboxymethyl cellulose and xanthan gum, and the carbon atom number of alkyl is 4-8. The drilling fluid has an obviously-improved system high-temperature rheological property.

Double-layer capacitors capable of operating at extremely low temperatures (e.g., as low as −80° C.) are disclosed. Electrolyte solutions combining a base solvent (e.g., acetonitrile) and a cosolvent are employed to lower the melting point of the base electrolyte. Example cosolvents include methyl formate, ethyl acetate, methyl acetate, propionitrile, butyronitrile, and 1,3-dioxolane. A quaternary ammonium salt including at least one of triethylmethylammonium tetrafluoroborate (TEMATFB) and spiro-(1,1′)-bipyrrolidium tetrafluoroborate (SBPBF₄), is used in an optimized concentration (e.g., 0.10 M to 0.75 M), dissolved into the electrolyte solution. Conventional device form factors and structural elements (e.g., porous carbon electrodes and a polyethylene separator) may be employed.

The present invention relates to new synthetic methods for preparing 2-methoxyisobutylisonitrile and metal isonitrile complexes, such as tetrakis(2-methoxyisobutylisonitrile)copper(I) tetrafluroroborate, which are used in the preparation of technetium (^99mTc) Sestamibi, and novel intermediate compounds useful in such methods.