METALS RECOVERY FROM SPENT CATALYST

    公开(公告)号:US20220259696A1

    公开(公告)日:2022-08-18

    申请号:US17625444

    申请日:2020-07-08

    IPC分类号: C22B7/00 C22B34/22 C22B34/34

    摘要: An improved method for recovering metals from spent catalysts, particularly from spent slurry catalysts, is disclosed. The method and associated processes comprising the method are useful to recover catalyst metals used in the petroleum and chemical processing industries. The method generally involves a pyrometallurgical method and a hydrometallurgical method and includes forming a soda ash calcine of a caustic leach residue of the spent catalyst containing an insoluble Group VIII/Group VIB/Group VB metal compound combined with soda ash, and extracting and recovering soluble Group VIB metal and soluble Group VB metal compounds from the soda ash calcine.

    Process for recovering ammonia from vanadium preparation for ammonium preparation and recycling wastewater

    公开(公告)号:US10974968B2

    公开(公告)日:2021-04-13

    申请号:US16565828

    申请日:2019-09-10

    IPC分类号: C01C1/02 C22B34/22

    摘要: The present invention discloses a process for recovering ammonia from vanadium preparation for ammonium preparation and recycling wastewater. A conventional vanadium extraction process is complex, and the most difficult to control and treat are ammonia emissions and wastewater treatment. The present process can directly extract ammonium metavanadate and ammonium polyvanadate from the beginning of mining and smelting, and gather all emitted ammonia to prepare ammonium in the process of preparing high-purity vanadium pentoxide by using the ammonium metavanadate or the ammonium polyvanadate, thereby ensuring zero emission of the exhaust gas, and effectively treat all wastewater generated in the above process by using a polyacid ester flocculation technology, thereby ensuring that the wastewater is not discharged but recycled, and realizing that the purity of all products reaches 99.5-99.99%.

    PROCESS FOR RECOVERING AMMONIA FROM VANADIUM PREPARATION FOR AMMONIUM PREPARATION AND RECYCLING WASTEWATER

    公开(公告)号:US20200087152A1

    公开(公告)日:2020-03-19

    申请号:US16565828

    申请日:2019-09-10

    IPC分类号: C01C1/02 C22B34/22

    摘要: The present invention discloses a process for recovering ammonia from vanadium preparation for ammonium preparation and recycling wastewater. A conventional vanadium extraction process is complex, and the most difficult to control and treat are ammonia emissions and wastewater treatment. The present process can directly extract ammonium metavanadate and ammonium polyvanadate from the beginning of mining and smelting, and gather all emitted ammonia to prepare ammonium in the process of preparing high-purity vanadium pentoxide by using the ammonium metavanadate or the ammonium polyvanadate, thereby ensuring zero emission of the exhaust gas, and effectively treat all wastewater generated in the above process by using a polyacid ester folucculation technology, thereby ensuring that the wastewater is not discharged but recycled, and realizing that the purity of all products reaches 99.5-99.99%.