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Применить Всего найдено 2. Отображено 2.
08-08-2023 дата публикации

Process for recovering palladium powder from waste palladium-carbon catalyst

Номер: CN116555578A
Автор: WU SHIHAO, ZOU JIANPING, HUANG QING, WU FEIYAO, CHEN PENG
Принадлежит:

The invention discloses a process for recovering palladium powder from a waste palladium-carbon catalyst. The process comprises the following steps: roasting, dissolving with acid, precipitating ammonium chloropalladate, complexing with ammonia, precipitating palladium with hydrochloric acid and reducing with hydrazine hydrate. The roasting is to remove deposited carbon and activated carbon in the waste catalyst; chlorine is introduced in the acid dissolution process to dissolve and oxidize palladium; ammonium chloride is added to separate palladium in the form of precipitate; ammonium complexing is to remove trace base metal impurities which are not complexed by ammonia; the palladium precipitation with hydrochloric acid is characterized in that the palladium forms dichlorodiamino palladium precipitation again; and hydrazine hydrate reduction is to reduce the dichlorodiamino palladium precipitate into palladium particles. The method is short in technological process, little in environmental ...

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Номер записи: 1
14-07-2023 дата публикации

Energy-saving environment-friendly high-salinity wastewater treatment equipment and method

Номер: CN116425336A
Автор: WU FEIYAO, ZOU JIANPING, TIAN LEI, ZHOU ZHIGANG, WU SHIHAO, CHEN PENG, TENG HEBIN
Принадлежит:

The invention relates to the technical field of wastewater purification, in particular to energy-saving and environment-friendly high-salinity wastewater treatment equipment and method.The equipment comprises a mounting shell, two first push rods are rotationally connected into the mounting shell, a center block is rotationally connected to the other end of each first push rod, and a second push rod is rotationally connected to the other end of each center block; the other ends of the two second push rods are rotationally connected with extrusion plates, the extrusion plates are slidably connected into the standing barrel, the two center blocks are in threaded connection with bidirectional threaded rods, and a first motor is mounted at the rear end of the mounting shell. Meanwhile, the device can also be used in insufficient sunlight or at night, different products can be filtered out from the high-salinity wastewater, different treatment methods are adopted for different products, pollution ...

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Номер записи: 2