516 results about "Sodium peroxide" patented technology

The invention provides a sodium ion doped high-nickel ternary lithium battery positive electrode material and a preparation method. The preparation method comprises the following steps: preparing an 811-type NCM (Nickel Cobalt Manganese) ternary positive electrode precursor through a co-precipitation method; after drying and grinding the precursor, mixing the ground precursor with powdery sodium peroxide and lithium oxide; pre-firing and sintering under an oxygen-rich environment to prepare the sodium ion doped high-nickel ternary lithium battery positive electrode material. According to the method provided by the invention, the defects that Ni<2+> is difficulty effectively controlled to be released from and embedded into a lamellar structure in a sintering process so that a structure is changed in a desorption process and the capacity of lithium ions is reduced are effectively overcome; sodium peroxide is changed into a molten state in a pre-firing process and permeates into the precursor, so that the Ni<2+> is oxidized into Ni<3+>; meanwhile, a lithium layer is occupied and an interlayer structure is expanded; the Ni<2+> is prevented from being migrated into the lithium layer ina sintering process; technical effects that nickel and lithium mixed arrangement of the high-nickel NCM positive electrode material is reduced, the migration rate of lithium ions is improved and the circulating performance of the battery is improved are realized.

The invention relates to a mineral water quality ecological modifying agent which is prepared by blending bentonite, alum, polyaluminium chloride and sodium dioxide in proportion; if the total amount is 1,000g, the weight proportion of each ingredient is as follows: 800-900g of bentonite, 40-80g of alum, 15-50g of polyaluminium chloride and 35-80g of sodium dioxide. The mineral water quality ecological modifying agent can be used for improving the aquaculture environment of fish ponds, balancing water ecological environment and enhancing unit fish yield per mu of fish ponds, and also can used for adsorbing blue algae, preventing the blue algae from doing harm to water, eliminating odor and protecting and improving water ecological environment; the water which derives from the treatment of chemical industry waste water, domestic sewage and the water of rivers, lakes, wells and pools can meet the national grade 1 and grade 2 water standards, and the precipitate from the water purification process can be recycled or used as feed or fertilizer, thus having low purifying treatment cost and high benefits.

A combined determination method for main components in high-carbon ferrochrome slag. The method is characterized by comprising the steps of: melting a high-carbon ferrochrome sample by a iron crucible; carrying out high-temperature melting decomposition by sodium peroxide; leaching in a 250ml plastic cup filled with water; acidifying and clarifying with sulfuric acid; placing at room temperature to obtain a high-carbon ferrochrome sample mother liquor; conducting constant volume analysis on the high-carbon ferrochrome mother liquor; decomposing the sample at one time; and respectively measuring the chemical composition of SiO2, Al2O3, MgO, CaO and Cr2O3 by 1) determination of Cr2O3 by potassium permanganate oxidation and ammonium ferrous sulfate titration method, 2) determination of SiO2 by a silicon molybdenum blue spectrophotometric method, and 3) determination of Al2O3, MgO and CaO by an EDTA volumetric method. The method greatly reduces the analysis time (determination of SiO2, Al2O3, MgO, CaO and Cr2O3 within four hours), while omits weighing and analysis of Al2O3 by a nickel crucible, and saves a lot of cost analysis.

A process for preparing high-purity stable ClO2 by desorption and stripping includes such steps as absorbing ClO2 gas by freezing water to obtain its aqueous solution, desorbing and stripping ClO2 from said aqueous solution, and reacting with sodium peroxide (or carbonate) solution. Its advantages are high quality and purity and no influence from impurities.

The invention is about the high clearing methanol compound petrol which is composed of the methanol, the petrol, the acetone, the isopropyl ether, the isopropanol, the isoamylol, the tert-butyl alcohol and the synthetic addition agent. The addition agent is modulated by the ZnO, the Na2O2, the ferrum naphthenate and the isopropyl nitrate. The compound petrol can solve the problem of the corrosivity to the red copper and the swelling to the rubber. It can be mixed with the normal petrol arbitrarily and not need to change the structure of the engine, also it can remove the carbon and the colloid of the engine. The cost of the technique is low and the operability is high.