3results about How to "High defluorination efficiency" patented technology

This invention discloses a supported boron-doped palladium oxide cluster catalyst, its preparation method, and its application. The preparation method includes optimizing the geometry and electronic structure of the Pd clusters through Pd precursor regulation and B atom doping. The B-doped Pd oxide cluster material substrate is carbon nitride, the Pd cluster loading is 0.5-2%, and B atoms are distributed in the Pd clusters. The molar ratio of B to Pd atoms is 0.01-0.2:1, and the average valence of Pd atoms is Pd₂. 1+ -Pd 4+ This catalyst can efficiently mineralize perfluorooctanoic acid and other carboxylic acid perfluorinated compounds in water through a chain reaction of decarboxylation coupled with hydroxylation and defluorination under normal temperature and pressure. The defluorination rate exceeds 95%, and its activity is not affected by environmental factors such as ions, dissolved organic matter, and pH in the water. The catalyst is suitable for the removal of perfluorocarboxylic acids from surface water, groundwater, or industrial wastewater, and has the advantages of simple operation, high efficiency, and good stability.

The utility model relates to a device for continuously removing hydrogen fluoride from industrial hydrogen chloride tail gas and belongs to the field of chemical equipment. The device comprises a static mixer, one end of the static mixer is sequentially connected with a gas-liquid separation device, a condenser and a hydrogen chloride gas outlet, and the other end of the static mixer is connected with a Venturi nozzle; the gas-liquid separation device is connected with a liquid circulation loop and a gas circulation loop, the gas circulation loop is provided with a hydrogen chloride gas inlet and is connected with the Venturi nozzle, and the liquid circulation loop is connected with the Venturi nozzle through a circulation pump. The hydrogen fluoride content in the hydrogen chloride tail gas can be reduced to below 5ppm, and the device has the advantages of simplicity in operation and environment friendliness.

The utility model discloses a kind of adsorbent multilayer multi-point uniform feeding device for electrolytic flue gas purification, it is related to electrolytic flue gas defluorination purification field, to solve the problem of high economic cost in prior art defluorination equipment, the technical scheme used is, multilayer air slide is set outside dust collector, and multiple feeding points are set on the air duct of each dust collector.The flue gas in air duct is contacted with the alumina powder of lower layer feeding after defluorination, and then contacted with the alumina powder of upper layer feeding, so that the defluorination efficiency is higher, and excellent defluorination effect can be achieved with less flue gas purification equipment.