5 results about "Bismuth hydroxide" patented technology

Methods for preparing catalysts for oxidative dehydrogenation (ODH) of alkanes such as ethane are provided An exemplary method includes providing a first mixture including metal oxides; a reducing agent; and one or more of a bismuth compound, an antimony compound, and a tellurium compound; and heating the first mixture to form the catalyst. The first mixture is essentially free of water. The metal oxides include an oxide of molybdenum and an oxide of vanadium. The bismuth compound includes bismuth oxide, bismuth hydroxide, or a bismuth carbonate. The antimony compound includes an oxide of antimony, antimony acetate, or antimony ethoxide. The tellurium compound includes tellurium dioxide.

The invention relates to positive electrode slurry, a preparation method, a positive electrode plate and a battery. The positive electrode slurry comprises an active substance, a conductive agent, a metal compound additive and a binder, and the metal compound additive comprises bismuth hydroxide and calcium nitrite. According to the positive electrode slurry, the performance of the zinc-nickel battery is remarkably optimized through the synergistic effect of bismuth hydroxide and calcium nitrite. Gas produced in the battery is greatly reduced, the problems of gas expansion and liquid spraying of the battery are solved, the conductivity is obviously improved, the anode current is uniformly distributed, active substances are efficiently utilized, and the cycle stability is improved.

This invention provides a flame-retardant rubber containing a bismuth-based flame retardant and its preparation method, belonging to the field of flame-retardant rubber technology. This invention uses natural rubber, nitrile rubber, styrene-butadiene rubber, and chloroprene rubber as the main base materials, while introducing at least one of bismuth oxide, bismuth oxychloride, bismuth hydroxide, and bismuth subcarbonate as an environmentally friendly flame retardant, ensuring the product's flame-retardant effect; it also reduces the use of complex solvents and potential by-product emissions, which is an important way to achieve an ideal green lifestyle. Carbon black, stearic acid, zinc oxide, decabromodiphenyl ethane, aluminum diethylphosphinate, diethyl phthalate, paraffin oil, coupling agents, insoluble sulfur, accelerators, antioxidants, and other substances are also added. Through multiple mixing and intensive kneading processes, the product's tensile properties are guaranteed while effectively improving its fire resistance, delaying ignition, reducing flame propagation speed, and enhancing the safety of product use.

The application discloses an epoxy resin emulsion for high-swimming power cathode electrophoretic paint and a preparation method thereof. The preparation method comprises a preparation step of modified epoxy resin and a preparation step of epoxy resin emulsion. The application improves the flexibility and molecular weight of the resin by simultaneously modifying the epoxy resin with polyester and polyether. The application reduces the solvent content in the emulsion system by increasing the molecular weight of the resin. The application introduces a drier, bismuth neodecanoate, into the resin system, which is low in cost and reduces the potential hydrolysis risk of bismuth hydroxide in the matching color paste. The resin emulsion formed by the application has small particle size, good stability, good curing performance, no abnormality after 40 times of MEK wiping, obviously increased flexibility, cupping and impact resistance of the paint film, and the swimming power of the four-box is more than 50%, the swimming power is obviously improved, and the performance is excellent, so that the application can be suitable for the coating of the body and parts system of a passenger car.

This method for producing a positive electrode active material for secondary batteries is characterized by including: an oxidation step of adding at least one hydroxide selected from the group consisting of aluminum hydroxide, strontium hydroxide, titanium hydroxide, bismuth hydroxide, zirconium hydroxide, and barium hydroxide to an Ni-containing compound, and performing oxidation treatment by heating the mixture; a firing step of mixing an oxide obtained in the oxidation step with an Li-containing compound, and firing the mixture; a water-washing step of mixing a fired product obtained in the firing step with water or an aqueous solution, and washing the mixture with water; and a drying step of drying the wet powder obtained in the water-washing step to obtain a lithium transition metal composite oxide, wherein the heating temperature in the oxidation step is 250°C-650°C inclusive.