568results about "Borates" patented technology

The present invention relates to a negative active material for a rechargeable lithium battery, which includes a silicon-based composite having a silicon oxide of the form SiOX where x≦1.5 and at least one element selected from the group consisting of B, P, Li, Ge, Al, and V, and a carbonaceous material. The negative active material of the present invention can improve the cycle-life and high-rate charge / discharge characteristics of a rechargeable lithium battery.

The COIL gain generator system includes a reactor for producing singlet delta oxygen and a mechanism for mixing high momentum diluent with the singlet delta oxygen and with iodine for producing a high momentum, low static temperature mixture of the singlet delta oxygen, diluent and iodine. The singlet delta oxygen and the iodine react to produce excited iodine atoms which can lase efficiently due to the low static temperature and can, after lasing, recover to high pressure in a diffuser due to the high momentum of the mixture. This provides the capability of using a chemical pump which allows a completely sealed system with no outside exhaust.

The invention relates to a clean production process of plateau sulfate type boron-lithium salt lake brine. The process comprises the following steps of: (1) arranging a pre-airing pond, a mirabilite pond, a NaCl pond, a carnallite pond, an epsom salt pond I, a magnesium removing pond, an epsom salt pond II, a boron pond, a lithium pond and an old brine pond; (2) controlling the sodium ion concentration in plateau sulfate type boron-lithium salt lake brine, precipitating mirabilite out in winter to obtain brine A, naturally evaporating the brine A, and salting out to obtain brine B; (3) naturally evaporating the brine B, and precipitating sylvine and carnallite out in sequence to obtain brine C; (4) naturally evaporating the brine C, precipitating an epsom salt out, and performing solid-liquid separation to obtain brine D and a solid A; (5) blending the brine D with mirabilite, removing magnesium to obtain brine E, and naturally evaporating brine E to obtain brine F and a solid B; (6) performing a hydration reaction on brine F, naturally evaporating, and precipitating reservoir water / inderite and brine G out; and (7) evaporating brine G or refrigerating for precipitating lithium sulfate, and processing the lithium sulfate into a corresponding product. The process has the advantages of comprehensive utilization of natural energy, saving in energy and environment friendliness.

The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculent and / or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.

A compact solid source of hydrogen gas, where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a catalyst, such as cobalt or ruthenium. The micro-disperse particles can have a substantially uniform diameter of 1-10 microns, and preferably about 3-5 microns. Ruthenium or cobalt catalytic nanoparticles can be incorporated in the micro-disperse particles of sodium borohydride, which allows a rapid and complete reaction to occur without the problems associated with caking and scaling of the surface by the reactant product sodium metaborate. A closed loop water management system can be used to recycle wastewater from a PEM fuel cell to supply water for reacting with the micro-disperse particles of sodium borohydride in a compact hydrogen gas generator. Capillary forces can wick water from a water reservoir into a packed bed of micro-disperse fuel particles, eliminating the need for using an active pump.

The gaseous effluent to be treated is contacted in column C1 with an absorbent solution selected for its property of forming two separable phases when it is heated. The regenerated absorbent solution is separated into two phases in drum B1; a fraction rich in water and a fraction rich in reactive compounds.Separation allows to optimize the operations performed on the regenerated absorbent solution. On the one hand, separation allows to carry out vaporization, through reboiler R1, of a fraction of the absorbent solution, preferably containing a limited reactive compound concentration in relation to the absorbent solution, thus limiting their degradation. On the other hand, separation of the phases allows to reduce the amount of solution to be treated in order to remove the non-regeneratable salts and thus to reduce the costs linked with their elimination. Finally, separation allows to eliminate the degradation products by carrying out a specific and suitable purification for each phase.The method can be applied to combustion fumes decarbonation and to natural gas or synthesis gas deacidizing.

The present invention provides a solid electrolyte with high ion-conductivity which is cheap and exhibits high conductivity in an alkaline form, and stably keeps high conductivity because of a small amount of the leak of a compound bearing conductivity even in a wet state. The invention is useful in an electrochemical system using the solid electrolyte, such as a fuel cell.The solid electrolyte with high ion-conductivity comprises a hybrid compound which contains at least polyvinyl alcohol and a zirconic acid compound, and also a nitrogen-containing organic compound having a structure of amine, quaternary ammonium compound and / or imine, obtained by hydrolyzing a zirconium salt or an oxyzirconium salt in a solution including water, polyvinyl alcohol, a zirconium salt or an oxyzirconium salt and a nitrogen-containing organic compound having a structure of amine, quaternary ammonium compound and / or imine coexist, removing a solvent and contacting with alkali.

An object of the present invention is to provide a cathode active material which contains small-particle sized and low-crystalline lithium transition metal silicate and which undergoes charge-discharge reaction at room temperature.The cathode active material for a non-aqueous electrolyte secondary battery is characterized by containing a lithium transition metal silicate and exhibits diffraction peaks having half widths of 0.175 to 0.6°, the peaks observed through powder X-ray diffractometry within a 2θ range of 5 to 50°.

A borate single crystal which can stably perform light wavelength conversion with high efficiency down to the ultraviolet region is represented by the chemical formula (A2O).(B2O3)x, and is an orthorhombic crystal belonging to the P212121 space group, wherein A includes two elements selected from the group consisting of Li, Na, K, Rb, and Cs, and 1.5<x<2.5.

The present invention relates to lithium composite compound particles having a composition represented by the formula: Li1+xNi1-y-zCoyMzO2 (M=B or Al), wherein the lithium composite compound particles have an ionic strength ratio A (LiO− / NiO2−) of not more than 0.3 and an ionic strength ratio B (Li3CO3+ / Ni+) of not more than 20 as measured on a surface of the respective lithium composite compound particles using a time-of-flight secondary ion mass spectrometer. The lithium composite compound particles of the present invention can be used as a positive electrode active substance of a secondary battery which has good cycle characteristics and an excellent high-temperature storage property.

The invention provides a compound cesium fluoborate, a nonlinear optical crystal with the cesium fluoborate, methods for preparing the compound cesium fluoborate and the nonlinear optical crystal and application of the compound cesium fluoborate and the nonlinear optical crystal. A chemical formula of the compound is CsB<4>O<6>F, the molecular weight of the compound is 291.15, and the compound is of a crystal structure and is prepared by the aid of solid-phase synthesis processes or vacuum packaging processes. A chemical formula of the nonlinear optical crystal is CsB<4>O<6>F, the molecular weight of the nonlinear optical crystal is 291.15, the nonlinear optical crystal belongs to orthorhombic crystal systems, space groups of the nonlinear optical crystal are Pna2<1>, crystal cell parameters of the nonlinear optical crystal include that an a is equal to 7.9241 , a b is equal to 11.3996 , a c is equal to 6.6638 and an alpha, a beta and a gamma are equal to 90 degrees, and the unit cell volumes of the nonlinear optical crystal are 601.95 <3>. Frequency doubling effects of the nonlinear optical crystal is approximately two times frequency doubling effects of KH<2>PO<4> [KDP (potassium dihydrogen phosphate)], and ultrasonic absorption edges of the nonlinear optical crystal are shorter than 190 nm. The nonlinear optical crystal is grown from the CsB<4>O<6>F by the aid of melt processes, high-temperature solution processes, vacuum packaging processes, hydrothermal processes or room-temperature solution processes. The compound cesium fluoborate, the nonlinear optical crystal, the methods and the application have the advantages that the nonlinear optical crystal is free of deliquescence in air, is good in chemical stability and can be applied to all-solid-state laser devices as an ultraviolet nonlinear optical crystal or deep ultraviolet nonlinear optical crystal.

The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and / or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.

The present invention relates to a negative active material for a rechargeable lithium battery, which includes a silicon-based composite having a silicon oxide of the form SiOX where x≦1.5 and at least one element selected from the group consisting of B, P, Li, Ge, Al, and V, and a carbonaceous material. The negative active material of the present invention can improve the cycle-life and high-rate charge / discharge characteristics of a rechargeable lithium battery.

The invention relates to a large-sized bismuth barium borate non-linear optic crystal, which belongs to the orthorhombic system with a space group equal to Pna21 and a molecular formula equal to BaBiBo4. The crystal is made from a mixed system of bismuth barium borate, fluxing agent Bi2O3 and BaB2O4, or BaO and Bi2O3; the nonlinear optical effect of the crystal is approximately five times of that of (KH2PO4) KDP; and the crystal is transparent within a wave band of between 200 and 3,000 nm, and has the large size with 1 to 100mmx1 to 100mmx1 to 100mm. The large-sized bismuth barium borate non-linear optic crystal has the advantages of quick making speed, simple operation, low cost, large-sized and transparent crystal made by the non-linear optic crystal, wide light-transmission wave band, ideal mechanical property, infrequent fragmentation, stable physicochemical properties, no deliquescence and easy processing and preservation; moreover, the non-linear optic crystal can be used to make non-linear optical devices such as a multiple frequency generator, an upper frequency converter or a lower frequency converter and an optical parametric oscillator.

The invention discloses a compound barium borofluoride, a barium borofluoride non-linear optical crystal, and a preparation method and a use of the barium borofluoride non-linear optical crystal. The compound barium borofluoride and the barium borofluoride non-linear optical crystal have the same chemical formula of Ba3B6O11F2. The barium borofluoride non-linear optical crystal belongs to a monoclinic system, has a space group P2(1), has cell parameters shown in the patent specification, wherein beta is equal to 101.351(4)deg., and has the molecular weight of 690.88. The powder frequency-doubling effect of the barium borofluoride non-linear optical crystal is 3 times that of KDP (KH2PO4). The compound barium borofluoride is synthesized by a solid-phase reaction method. The barium borofluoride non-linear optical crystal grows by a high-temperature melting method. The barium borofluoride non-linear optical crystal has large mechanical hardness, can be cut, polished and stored easily, and can be widely used in preparation of nonlinear optical devices such as a frequency multiplication generator, an upper frequency converter, a lower frequency converter and an optical parameter resonator.

The invention discloses a co-extraction method of boron and lithium in brine; and a mixing extraction system is adopted to synchronously extract boron and lithium in the brine to realize separation ofboron and lithium from a brine basal body. Lithium and boron in an organic phase are reversely extracted by adopting acid solution and alkali solution to realize separation of boron and lithium. Lithium-contained reverse extracting liquid is condensed for cooling crystallization to prepare lithium chloride or precipitation to prepare lithium carbonate, and is directly condensed for crystallization to prepare boron sand or is acidified for concentration crystallization to prepare boric acid. The method only relates to conventional separation and enrichment operations, is simple in process andclosed in circulation, and realizes efficient recovery of boron and lithium. In addition, as boron and lithium are synchronously extracted, on the basis of simplifying operations and process steps, the problems of low extraction rate, weak organic phase stability and the like caused by mutual interference between boron extraction and lithium extraction organic phases in step-by-step boron and lithium extraction are solved.

The invention provides a method for synchronously extracting boron and iron in paigeite. The method comprises the following steps: fully mixing a paigeite powder and an additive composed of sodium carbonate, sodium sulfate, natrium humate, sodium fulvate and sodium oxalate by mixing, agglomerating, performing reduction roasting on dried paigeite agglomerates which take coal as a reducing agent, cooling the roasting agglomerates and placing in a bowl mill, synchronously grinding ore and leaching by water, performing solid-liquid separation on a pulp to obtain a filtrate containing sodium metaborate and filter residues containing metallic iron powder, evaporating and crystallizing a filtrate to obtain the sodium metaborate crystals; employ a wet type weak magnetic separation on the filter residue to obtain the directly reduced metallic iron powder with iron grade greater than 90%, wherein the metallic iron powder is a high-quality furnace material used for making steel of an electric furnace; and treating the magnetic separation nonmagnetic products to recover the valuable components such as magnesium and silicon. The method has the advantages of strong raw material adaptability, simple process flow, high production efficiency, less energy consumption, low cost, good comprehensive recovery effect of ferroboron and high product added value. The method provided by the invention can provide technical support for efficiently using the paigeite with abundant reserve volume for our country, and has wide popularization and application prospects.

A cathode composition is provided to coexist high output and cycle properties in a non-aqueous electrolytic secondary battery and to enhance operability and yield in battery manufacturing by suppressing viscosity increase of cathode slurry. A cathode composition for non-aqueous electrolytic secondary batteries comprises lithium-transition metal composite oxide represented by LiaNi(1-x-y)CoxM1yWzM2wO2 and boron compound which includes boron element and oxygen element. In the chemical formula, 1.0<=a<=1.5, 0<=x<=0.5, 0<=y<=0.5, 0.002<=z<=0.03, 0<=w<=0.02, 0<=x+y<=0.7, M^1 is one or more selected from a group comprises of Mn and Al, and M2 is one or more selected from a group including Zr, Ti, Mg, Ta, Nb and Mo.

The gaseous effluent to be treated is contacted in column C1 with an absorbent solution selected for its property of forming two separable phases when it is heated. The regenerated absorbent solution is separated into two phases in drum B1; a fraction rich in water and a fraction rich in reactive compounds.Separation allows to optimize the operations performed on the regenerated absorbent solution. On the one hand, separation allows to carry out vaporization, through reboiler R1, of a fraction of the absorbent solution, preferably containing a limited reactive compound concentration in relation to the absorbent solution, thus limiting their degradation. On the other hand, separation of the phases allows to reduce the amount of solution to be treated in order to remove the non-regeneratable salts and thus to reduce the costs linked with their elimination. Finally, separation allows to eliminate the degradation products by carrying out a specific and suitable purification for each phase.The method can be applied to combustion fumes decarbonation and to natural gas or synthesis gas deacidizing.

The invention provides a preparation method of high-purity lithium tetrafluoroborate; and the method comprises the following steps that high-purity lithium fluoride and a boron trifluoride coordination compound react in chain carbonate organic solvent, and lithium tetrafluoroborate is obtained after filtration, concentration, extractive crystallization, washing and drying. In the preparation method of high-purity lithium tetrafluoroborate, the boron trifluoride coordination compound has wide sources of raw materials and is low in price, the linear carbonate organic solvent has low toxin and is environment-friendly, the synthetic reaction conditions are mild, the operation is simple, the equipment investment is low, the lithium tetrafluoroborate productivity is high, the yield is high, the energy consumption is low, the post-treatment is simple, and the method is applicable to large-scale production.

The invention relates to a process for synthesizing magnesium borate crystal whisker with high length-diameter ratio, which consists of reacting boric acid, magnesium chloride and caustic soda in water solution by right proportion to obtain boracic magnesium compound precipitate, filtering to obtain precursor for magnesium borate crystal whisker production, then mixing fluxing agent comprising NaCl or NaCl and KCl with the precursor, charging menthol, ethanol, water or their mixed solution, immersing, agitating and mixing, subjecting the mixture to high temperature reaction at 500-900 deg C for 5-10 hours, cooling down, washing with water, and finally drying.

A method and apparatus for refining silicon which can remove impurity elements such as phosphorus and antimony as well as impurity elements such as boron and carbon using an electron beam in the same vacuum chamber are provided. Silicon is irradiated and melted with an electron beam in a low vacuum inside a vacuum vessel, a compound-forming substance such as H2O which reacts with boron or the like in the molten silicon and forms a vaporizable oxide is introduced into the vacuum chamber, and impurity elements such as boron having a low vapor pressure in a vacuum are evaporated from the molten silicon as part of the vaporizable compound. Silicon in the vacuum vessel is then irradiated with an electron beam in a high vacuum in the vacuum vessel, and impurity elements contained in the silicon having a high vapor pressure in a vacuum such as phosphorus are removed.

The invention relates to a method for preparing aluminum borate nanowire which is Al4B2O9 or Al18B4O33 nanowire. The preparation method is implemented according to the following steps of: (1) adding the formula amount of aluminum salt into water for being dissolved sufficiently so that the concentration of aluminum salt solution is 0.01-2.0mol / L, called solution A; (2) adding the formula amount of boric acid and sugar into water for being dissolved sufficiently so that the concentration of boric acid solution is 0.01-2.0mol / L, called solution B; (3) slowly adding the solution B into the solution A for agitation for 2-72 hours, and then drying at 40-300 DEG C to obtain faint yellow xerogel; (4) calcining the xerogel obtained in the step (3) for 2-72 hours at 400-1500 DEG C in an atmosphere of air in order to generate white powder; (5) washing the white powder obtained in the step (4) with hydrochloric acid at first and then with hot water, and drying at 40-200 DEG C to obtain the aluminum borate nanowire. The method is simple in process, easy in operation, high in yield, complete in crystal formation of the product, relatively even in size distribution and high in purity.

The invention provides a method for purifying lithium sulfate crude ore. The method comprises the following steps: step I, mixing the lithium sulfate crude ore S0 with excessive water to ensure that soluble ingredients in the lithium sulfate crude ore are just dissolved completely, and carrying out solid-liquid separation to obtain a solution L0; step II, freezing the solution L0 to separate out mirabilite, and carrying out solid-liquid separation to obtain a solution L1 and a solid S1; step III, evaporating the solution L1 to separate out a solid phase, and carrying out solid-liquid separation to obtain a solution L2 and a solid S2; step IV, allowing the solution L2 to stand still in a sealed condition for 7 to 50 days at 0 to 40 DEG C to separate out borate, and carrying out solid-liquid separation to obtain a solution L3; step V, mixing the solid S1 obtained in the freezing process in the step II with the solution L3, and evaporating the mixture at 0 to 40 DEG C to separate lithium sulfate concentrate.

The present invention relates to bridging agents for use in subterranean formations, to well drill-in and servicing fluids comprising such bridging agents, and to methods of using such bridging agents and well drill-in and servicing fluids in subterranean drilling operations. An example of a well drill-in and servicing fluid of the present invention comprises a viscosified fluid, a fluid loss control additive, and a bridging agent comprising a degradable material.

The invention provides a compound rubidium borofluoride and a rubidium borofluoride non-linear optical crystal and a preparation method and use of the rubidium borofluoride non-linear optical crystal. The compound rubidium borofluoride has a chemical formula of RbB4O6F, has molecular weight of 243.71 and is prepared through a solid phase synthesis method or a vacuum packaging method. The crystal has a chemical formula of RbB4O6F, has molecular weight of 243.71, belongs to the orthorhombic system, and has a space group of Pna 21 and cell parameters such as a=7.6742A, b=11.228A, c=6.6218A, alpha=beta=gamma=90 degrees, unit-cell volume of 570.57 A<3>, crystal frequency-doubled effect about 1.9 times that of KH2PO4 (KDP) and ultraviolet absorption edge shorter than 190nm. The crystal is formed through a melt method, a high temperature melt method, a vacuum encapsulation method, a hydrothermal method or a room-temperature solution method. The crystal has good chemical stability and can be used as an ultraviolet and deep-ultraviolet non-linear optical crystal in an all-solid-state laser.

The invention discloses a precursor with a double-layer structure for a lithium ion battery, a positive electrode material and a preparation method, which aim to prepare a product of which primary particles are closely stacked inside and loosely stacked outside by using different reaction conditions. The tap density of the particles is guaranteed through internal close packing, and the loose outer part can exert better specific capacity and rate capability, so that the specific capacity, the rate capability and the energy density of the material can be improved at the same time; different elements are doped inside and outside the material in a targeted manner, and meanwhile, the rate capability inside the material and the cycling stability outside the material are improved; a doping element is directly added in the coprecipitation reaction process, so that the doping element can be uniformly distributed in the surface layer of precursor particles at the atomic level, and the doping modification effect is fully exerted. By utilizing different structures inside and outside the particles and using different doping elements, the comprehensive performance of the layered ternary material can be effectively improved.

A method and apparatus for refining silicon which can remove impurity elements such as phosphorus and antimony as well as impurity elements such as boron and carbon using an electron beam in the same vacuum chamber are provided. Silicon is irradiated and melted with an electron beam in a low vacuum inside a vacuum vessel, a compound-forming substance such as H2O which reacts with boron or the like in the molten silicon and forms a vaporizable oxide is introduced into the vacuum chamber, and impurity elements such as boron having a low vapor pressure in a vacuum are evaporated from the molten silicon as part of the vaporizable compound. Silicon in the vacuum vessel is then irradiated with an electron beam in a high vacuum in the vacuum vessel, and impurity elements contained in the silicon having a high vapor pressure in a vacuum such as phosphorus are removed.