A kind of method for preparing ammonium perrhenate
A technology of ammonium perrhenate and perrhenic acid, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry and other directions, can solve the problems of difficulty in separation of molybdenum and rhenium, waste of resources, environmental pollution, etc., and achieve good economic value and environmental benefits , the effect of protecting the environment
Active Publication Date: 2016-03-16
XIAMEN STARMEM TECH
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Problems solved by technology
As a result, rhenium is diluted, and at the same time, due to the very similar properties of rhenium and molybdenum, it is difficult to separate molybdenum and rhenium. Therefore, many domestic molybdenum production enterprises discard the molybdenum roasting flue gas absorption liquid as waste liquid, which not only pollutes the environment but also caused a waste of resources
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[0025] The method for preparing ammonium perrhenate described in the present invention is as figure 1 As shown, the molybdenite is roasted to produce flue gas. After the flue gas is dedusted, it is leached, and the water produced by leaching contains H 2 SO 4 、H 2 SO 3 , SO 2 、H 2 MoO 4 、H 2 ReO 4 , where H 2 ReO 4 The content is 40-50mg / L, take the washing water and enter the nanofiltration membrane to concentrate, the nanofiltration concentration results are as follows:
[0026]
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The invention discloses a method for preparing ammonium perrhenate, which comprises the following steps: step 1: the flue gas produced after molybdenite roasting is washed and cooled by washing tower, and the perrhenic acid contained in the flue gas is dissolved in water, The aqueous solution dissolved with perrhenic acid is circulated to rinse the roasting flue gas to enrich the concentration of perrhenic acid; step 2: collect the aqueous perrhenic acid solution, and filter the filtrate through nanofiltration membrane equipment to filter the aqueous solution Concentrate to obtain perrhenic acid nanofiltration concentrated solution; Step 3: The perrhenic acid nanofiltration concentrated solution is passed through continuous ion exchange equipment, rhenium is eluted with a resolving agent, and the collected eluent is heated and concentrated at 100°C, After cooling and crystallization, ammonium perrhenate is obtained. The invention uses the flue gas produced after molybdenite roasting as raw material, and uses nanofiltration membrane equipment and continuous ion exchange equipment to recover ammonium perrhenate, thereby achieving the purpose of resource recycling and environmental protection, and has good economic value and environmental protection. benefit.
Description
technical field [0001] The present invention relates to the use of nanofiltration membrane concentration equipment and continuous ion exchange equipment to recover H from the flue gas after molybdenite roasting 2 ReO 4 Methods. Background technique [0002] Rhenium is a kind of scattered metal. There is no elemental rhenium in nature. Rhenium is often used as a coating material because of its excellent ductility, wear resistance and high temperature resistance. The application of rhenium is becoming more and more extensive, and the supply in the market is in short supply. It is mainly used in petroleum smelting catalysts, thermoelectric superalloys, electron tube structural materials, aerospace special alloys, environmental protection and other fields. [0003] Rhenium itself has no independent deposits, and is often dispersed in other non-ferrous metal ore bodies. It mainly coexists with molybdenite, mostly associated with molybdenum, copper, lead, zinc, platinum and othe...
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IPC IPC(8): C01G47/00
Inventor 陈洪景黄燎原彭火生孙洪贵虞美辉
Owner XIAMEN STARMEM TECH