41 results about "Cerium(III) oxide" patented technology

Relating to a catalyst, the invention provides a preparation method of a catalyst for styrene preparation by ethylbenzene dehydrogenation. The catalyst has high crushing strength, large aperture and small specific surface area, and also has high catalytic activity in ethylbenzene dehydrogenation reaction under a low water ratio condition. The catalyst for styrene preparation by ethylbenzene dehydrogenation is a composite oxide of iron, potassium, magnesium, cerium and molybdenum. The method includes:1) preparation of nano-Ce2O3; and 2) preparation of the catalyst. According to a technical scheme, self-made nano-dicerium trioxide is adopted, and cerium nitrate and nano-dicerium trioxide in a proper ratio are introduced into the catalyst as the cerium source. The prepared catalyst has large aperture, small specific surface area and high crushing strength, and can maintain high catalytic activity under a low water-oil ratio condition.

The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO 2 : ZrO 2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.

The invention provides a raw material for producing a disc insulator with good insulation performance and a preparation method, and relates to the technical field of electric power equipment. The production raw material and preparation method of the disk-shaped insulator with good insulation performance, the main raw material of the disk-shaped insulator includes the following raw materials in parts by mass: 15-25 parts of aluminum oxide, 10-15 parts of high potassium feldspar, clay 40-60 parts, 0.1-1 part of lanthanum oxide, 0.1-1 part of cerium oxide, 0.1-0.88 part of praseodymium oxide, 15-18 parts of pearl clay, 15-18 parts of garnet; the glazed surface of the main body of the disc-shaped insulator The raw materials include the following raw materials in parts by mass: 15-20 parts of quartz, 2-5 parts of talc, 18-27 parts of kaolin, 1-3 parts of copper oxide, 1-3 parts of ferric oxide, and 0.1-1 part of rare earth oxide . The processed insulator can have good mechanical strength, and at the same time, the processed insulator has good insulation performance and can ensure the long-term use of the insulator, which is worthy of vigorous promotion.

The invention discloses an alloy co-infiltration dacromet and sealing layer comprehensive anti-corrosion coating, including alloy co-infiltration agent, dacromet coating liquid and sealing liquid: alloy co-infiltration agent includes zinc powder, aluminum powder, aluminum oxide powder, Nickel powder, cerium oxide powder, ammonium chloride; Dacromet anti-corrosion coating liquid includes A component and B component, A component includes zinc flake and aluminum flake, deionized water, fatty alcohol polyoxyethylene ether, B The components include amorphous compound molybdate compound, barium salt, hydrogen peroxide, polyethylene glycol; component A and component B are mixed according to the mass ratio of 1: (15-25); the blocking solution includes pre-preparation Pre-preparation components include, room temperature curing agent, ethanol solution with a volume concentration of 50% to 80%, a mixture of glycerol, zinc flakes and aluminum flakes; the curing reaction components are Epoxy resin aqueous emulsion, the pre-preparation component and the curing reaction component are mixed according to the mass ratio of 2: (2-3).