Method for recovering palladium from barium sulfate carrier invalid palladium catalyst
A palladium catalyst and barium sulfate technology, which is applied in the field of comprehensive recycling of precious metal secondary resources, can solve the problems of short process flow and achieve the effects of short process flow, low production cost and simple operation
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Embodiment 1
[0028] Such as figure 1 Shown, the method for recovering palladium from barium sulfate carrier invalidation palladium catalyst, carries out successively according to the following steps:
[0029] A. Oxidation roasting: Put 200 g of the barium sulfate carrier invalid palladium catalyst into a 500 ml porcelain bowl and roast at a high temperature in a muffle furnace, the roasting temperature is 800° C., and the roasting time is 2 hours;
[0030] B. Ball mill mixing: the barium sulfate carrier invalid palladium catalyst after roasting is ground into particles with a particle size of 200 mesh with a ball mill, and the particles after grinding are mixed evenly with sodium carbonate and anti-dispersing agent according to the mass ratio of 20:60:1;
[0031] C. High-temperature calcination: put the mixed material into a 1500ml porcelain bowl and use a muffle furnace for high-temperature calcination. The high-temperature calcination temperature is 900°C, and the calcination time is 2 h...
Embodiment 2
[0038] The method for recovering palladium from barium sulfate carrier invalidation palladium catalyst, carries out successively according to the following steps:
[0039] A. Oxidation roasting: Put 500 g of barium sulfate carrier invalid palladium catalyst into a 500 ml porcelain bowl and roast at a high temperature in a muffle furnace, the roasting temperature is 700° C., and the roasting time is 4 hours;
[0040] B. Ball milling mixture: the barium sulfate carrier invalid palladium catalyst after roasting is ground into particles with a particle size of 120 mesh with a ball mill, and the particles after grinding are mixed evenly with sodium carbonate and anti-dispersing agent according to the mass ratio of 40:160:3;
[0041] C. High-temperature calcination: put the mixed material into a 1500ml porcelain bowl and use a muffle furnace for high-temperature calcination. The high-temperature calcination temperature is 800° C., and the calcination time is 3 hours;
[0042] D. Wat...
Embodiment 3
[0048] The method for recovering palladium from barium sulfate carrier invalidation palladium catalyst, carries out successively according to the following steps:
[0049] A. Oxidation roasting: Put 500 g of barium sulfate carrier invalid palladium catalyst into a 500 ml porcelain bowl and roast at a high temperature in a muffle furnace, the roasting temperature is 600° C., and the roasting time is 6 hours;
[0050] B. Ball mill mixing: the barium sulfate carrier invalid palladium catalyst after roasting is ground into particles with a particle size of 40 meshes with a ball mill, and the particles after grinding are mixed evenly with sodium carbonate and anti-dispersing agent according to the mass ratio of 10:50:1;
[0051] C. High-temperature calcination: put the mixed material into a 1500ml porcelain bowl and use a muffle furnace for high-temperature calcination. The high-temperature calcination temperature is 900°C, and the calcination time is 2 hours;
[0052] D. Water sol...
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