32results about How to "Reduce oxidation activity" patented technology

A method of producing prebaking semi-graphite anodes comprises: cracking-screening-blending-pugging-molding-baking. It is characterized in, after the middle forging, the prebaking anode thickener contains( by weight), 20úÑ-50úÑ petrolatum coke, 0úÑ-50úÑ semi-graphite petrolatum coke or graphite petrolatum coke, 0úÑ-40úÑ man-made graphite, 14úÑ-20úÑ coal pitch, 0úÑ-20úÑ stub, ash below 1%; puggingis at 140degree C-180degree C, molding is at 130degree C-150degree C, baking is at 1050degree C-1250degree C. The prebaking semi-graphite anode has a low resistance and a low oxidization activity, excellent performance of resisting heat and shock.

The invention relates to a 'catalyst used for ammonia selective catalytic reduction of nitrogen oxides to nitrogen gas and a preparation method thereof', and belongs to the catalyst technical filed. The catalyst consists of V2O5-WO3/TiO2/BaO/gamma-Al2O3. The catalyst takes gamma-Al2O3 as a carrier, which increases specific surface area of the catalyst and lowers the catalyst carrier cost; BaO is added to protect the carrier against sulfation, reduce oxidization activity on sulfur dioxide and prolong service life of the catalyst; and titanium dioxide is highly dispersed on surface of the carrier, thus improving utilization rate of the titanium dioxide. The catalyst is characterized by low cost, high catalytic activity and very low activity to oxidize sulfur dioxide to sulfur trioxide.

The invention provides a high-voltage lithium secondary battery. The high-voltage lithium secondary battery comprises a negative electrode, a positive electrode, a separator and a non-aqueous electrolyte, wherein the separator and the non-aqueous electrolyte are arranged between the negative electrode and the positive electrode, an active substance of the negative electrode is a lithium transition metal oxide, an active substance of the positive electrode is a mixture containing elemental silicon or silicon oxide, the separator is a polyethylene (PE), polypropylene (PP) or ceramic separator, the non-aqueous electrolyte comprises a non-aqueous organic solvent, a lithium salt and an additive, and the additive comprises fluoroethylene carbonate (FEC), 1,3,5-triallyl isocyanurate and a dinitrile compound. Compared with the prior art, the high-voltage lithium secondary battery has the advantages that by a synergistic effect generated by combined application of the three additives, the physical and chemical structural stability of an electrode surface is improved, so that the high-voltage lithium battery with a silicon-based negative electrode has relatively good high-temperature storage performance and cycle performance.

The invention provides ternary high-nickel electrolyte and a high-nickel anode lithium ion battery containing the electrolyte. The ternary high-nickel electrolyte is characterized by comprising, by weight, 13-15% of lithium salt, 80-85% of a non-aqueous organic solvent and 0.1-5% of an additive; wherein the additive comprises vinylene sulfate, vinylene carbonate, succinonitrile, tris (trimethyl silicon-based) phosphorus, lithium bifluroflavin imide and lithium dioxalate borate; the lithium salt is lithium hexafluorophosphate; the non-aqueous organic solvent comprises a cyclic carbonate compound, dimethyl carbonate and ethoxy pentafluoro tripolyphosphate; the high-nickel anode lithium ion battery containing the ternary high-nickel electrolyte adopts anode slurry prepared from high-nickel ternary anode powder, a conductive agent, a functional composite binder, a solvent N-methyl pyrrolidone to prepare the anode membrane, the high-nickel anode lithium ion battery has excellent normal-temperature cycle performance, high-temperature cycle performance and high-temperature storage service life, and can obviously reduce the gas yield in the high-temperature storage process.

[Problem] Provided is a method for regenerating a catalyst, the method decreasing the SO₂ oxidation rate, which has been increased by Fe and V compounds, of a spent denitration catalyst to an extremely low level, and improves the oxidation activity of the catalyst for metal mercury by the regeneration treatment.

[Solving Means] A method for regenerating a catalyst, including steps of immersing a spent denitration catalyst composed mainly of titanium oxide in (a) a mixed aqueous solution containing phosphate ions and oxo-acid ions of one or more elements selected from vanadium (V), molybdenum (Mo), and tungsten (W), (b) a heteropoly acid compound aqueous solution containing phosphorus and one or more elements selected from V, M, and W, or (c) a mixed aqueous solution containing a phosphate compound and a vanadyl compound, and then drying the catalyst.

The invention provides a preparation method of a catalytic cracking flue gas desulfurization agent. The preparation method provided by the invention comprises the following steps: dipping cerium ion active components on a granular carrier under a certain condition, adding alumina sol and/or silica sol, drying, and roasting to obtain a semi-finished product, wherein the active components can be better dispersed on the carrier; simultaneously, more acid centres can be formed in the carrier; and the reaction activity is increased; and then, dipping magnesium ion active components on the semi-finished product, drying, and roasting to obtain the desulfurization agent. According to the invention, the cerium ion active components are dipped at first; the magnesium ion active components are dipped after alumina sol and/or silica sol are/is added; therefore, the cerium active components are sufficiently dispersed in an aluminium oxide porous channel; the magnesium active components form a clad layer outside the cerium active components; in the event of desulfurizing, desulfurization reaction is carried out in different levels; the desulfurization activity is higher; the transfer rate of SOx in flue gas is high; and the desulfurization agent is long in service life.

The invention relates to a preparation method of a fire preventing and extinguishing material for a coal mine and belongs to the technical field of flame-retardant materials. The prepared fire preventing and extinguishing material for the coal mine is water absorption gel, a large amount of condensed water and a small amount of immobile water exist in the water absorption gel, and 2-3 water molecular layers with the thickness of 0.5-0.6 nm are formed on the surfaces of molecules through hydrophilic hydration; the first layer is hydrated water formed by polar ion groups and water molecules through coordination bonds or hydrogen bonds; the second layer is a combined water layer formed by water molecules and hydrated water through hydrogen bonds; the gel absorbs water mainly through the interaction between internal three-dimensional space networks, a large amount of free water is absorbed and stored in grids, and the larger the pore diameter of the gel three-dimensional space networks is,the higher the water absorption rate is; the water absorption gel covering the surface of the coal body reduces the probability of contact between a coal body and oxygen, blocks an air leakage channel, reduces the oxygen concentration, absorbs heat for cooling and reduces the oxidation activity of the coal, so that the prepared fire preventing and extinguishing material for the coal mine is highin fire extinguishing efficiency and high in speed.

The invention provides a fish meal additive, belongs to the field of additives, and solves the problems that fat is easy to rancidify and protein is easy to corrupt and mildew in fish meal of feeds in the prior art. The fish meal additive comprises the following components in parts by weight: 0.2-0.6 part of butylated hydroxytoluene, 0.2-0.6 part of tert-butyl hydroquinone, 2-4 parts of malic acid, 1-2 parts of citric acid, 1-2 parts of silica bauxite, 2-5 parts of zeolite and 0.05-0.1 part of yeast. According to the fish meal additive, by selecting varieties and contents of materials, the possibilities of rancidity of the fat and corruption and mildewing of the protein are reduced, so that the preservation time of the fish meal is prolonged, and the application security of the fish meal in the feeds is improved.

The invention discloses a non-aqueous electrolyte. The non-aqueous electrolyte comprises a non-aqueous organic solvent, a lithium salt and an additive, and the additive comprises lithium tetrafluoroborate and at least one of unsaturated bond-containing dinitrile compounds of formula I and formula II. In the formula I and the formula II, R1, R2, A1 and A2 are independently selected from one or more of C0-C5 aliphatic alkyl groups; and R3, R4, A3 and A4 are independently selected from one or more of the hydrogen atom, the fluorine atom , the chlorine atom, an alkyl group and a phenyl group. Additionally, the invention also discloses a lithium ion battery containing the non-aqueous electrolyte.

The invention discloses a treatment method of a smelted neodymium-iron-boron alloy sheet. The method comprises the steps that a smelted neodymium-iron-boron alloy sheet is placed in hydrogen-argon mixed gas; the temperature of the smelted neodymium-iron-boron alloy sheet is 400 to 550 DEG C; and in the hydrogen-argon mixed gas, the volume ratio of hydrogen is 5% to 80%. According to the treatmentmethod for the smelted neodymium-iron-boron alloy sheet, the discharging efficiency of the alloy sheet can be effectively improved, and the hydrogen decrepitation process time is shortened; and the alloy sheet is not easy to oxidize in air.

The invention provides an electrolyte for a lithium ion battery and a lithium ion battery comprising the same. The electrolyte for the lithium ion battery comprises an organic solvent, a lithium salt,a first additive and a second additive, wherein the first additive and the second additive respectively have structural formulas as shown in formulas (I) and (II). The oxidation potential of the first additive is lower than that of the organic solvent, a compact solid electrolyte phase interface film can be preferentially formed on the surface of the positive electrode through oxidative polymerization, oxygenolysis gas production is reduced, and consumption of active substances is reduced. Nitrogen atoms of the second additive can be effectively complexed with transition metal atoms with highvalence, and the interface impedance of the positive electrode is reduced to facilitate migration of lithium ions on the positive electrode interface, effectively reduce the oxidation activity of a positive electrode material to the electrolyte, especially the oxidation of the electrolyte under a high-temperature condition, further inhibit reduction and dissolution of transition metals caused bythe change of the structure of the positive electrode material, and improve the high-temperature performance of the lithium ion battery.

The invention discloses a battery slurry solid content test device and test method. The device is specifically a concave type tray. The concave type tray comprises a tray bottom and an external rim. The concave type tray is made of a composite material. The specific raw materials for preparing the composite material comprise the following ingredients: C: 0.03-0.06%, Si: 0.6 -0.8%, Mn: 2-2.1%, Cr:19.0-22.0%, Ni: 9-11. 5%, N: 1.0-1.2%, and the balance being Fe. Compared with the prior art, the device has the following advantages: 1) the design of the concave type tray structure effectively ensures storage stability of the slurry to be tested in the taking and putting, testing and transporting process, and reduces splashing; 2) the test device prepared through the composite material is low in oxidation activity, is high in high-temperature tolerance and can maintain constant weight before or after baking, thereby reducing errors caused by the device itself of the test method; and 3) thetest method is simple, and the device is low in cost.

A noble metal is supported on an upstream-side catalytic portion 20 at least, and an SO_x storage material, such as Mg and K that lower the noble metal's activities, is supported on a downstream-side catalytic portion 21. The noble metal being supported on the upstream-side catalytic portion 20 oxidizes SO₂ efficiently to turn it into SO_x, because the lowering of oxidizing activities is suppressed. These SO_x are retained by means of storage in the SO_x storage material being loaded on the downstream-side catalytic portion 21. Therefore, the SO_x storing performance improves, and it is good in terms of durability as well.

The invention belongs to the technical field of lithium ion batteries. The multifunctional high-voltage lithium ion battery electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, the additive comprises a difluorophosphoryl boron-accommodating compound, three substituent groups of the difluorophosphoryl boron-accommodating compound are respectively difluorophosphoryl-PO2F2 or-F, and at least one of the substituent groups is difluorophosphoryl. Compared with the prior art, the electrolyte disclosed by the invention not only can improve the high-temperature performance of the lithium ion battery under high voltage, but also greatly improves the cycle performance and the low-temperature performance of the battery. Meanwhile, the special additive also has a certaineffect of removing water and acid. In addition, the invention also provides a high-voltage lithium ion battery using the electrolyte.

The invention provides an additive for improving pig feed safety, belongs to the field of pig feed additives, and aims to solve the problems that fat in fish meal in pig feed is easy to rancidify, proteins in the fish meal in the pig feed are easy to decay and mildew, and the like. The additive for improving pig feed safety comprises the following components in parts by weight: 2-4 parts of malic acid; 1-2 parts of succinic acid; 0.2-0.8 part of citric acid; 0.1-0.5 part of tartaric acid; 1-2 parts of bentonite; 2-5 parts of zeolite; 0.3-0.8 part of saccharomycetes and 0.3-0.8 part of lactic acid bacteria. The additive for improving pig feed safety is selective in the type and the content of the materials, and by reducing the possibility of fat rancidity and protein decay and mildewing of the fish meal, the feed safety of the pig feed is improved.