A revival method of spent FCC catalysts with controlled leaching, metal passivation and active component compensation
A technology of active ingredients and spent catalysts, applied in catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc. Low metal nickel content, stable acidity, and improved catalytic performance
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Embodiment 1
[0029] Embodiment 1: by sieving particle size greater than 30 μm waste catalyst (below the same), react with impurity-removing active agent, (in this embodiment waste FCC catalyst is recorded as former agent, and its test sample analysis data is as follows figure 1 As shown, the phase analysis is as follows figure 2 As shown, the following examples are the same), select 1% impurity removal activator and spent catalyst to control the impurity removal reaction, the liquid-solid ratio is 6:1, the reaction time is 3 hours, the process pH is controlled at ≮1, and the filter residue is deionized and washed for 2 After rinsing twice, the filter residue was impregnated in 0.03% boric acid and lanthanum nitrate (the amount of lanthanum nitrate added is based on the mass fraction of lanthanum oxide to control the loss of impurities, the same below), the immersion temperature was 45 ° C, the immersion time was 6 hours, and the Vacuum filtration, drying and dehydration at 120°C, calcinat...
Embodiment 2
[0030] Example 2: Select 2% impurity removal agent and spent catalyst to carry out controlled impurity removal reaction, the liquid-solid ratio is 6:1, the reaction time is 4 hours, the process pH is controlled at ≮1, the filter residue is deionized, washed twice, and rinsed 2 times a kilogram, the filter residue was immersed in 0.04% boric acid and lanthanum nitrate solution, the immersion temperature was 45°C, the immersion time was 7 hours, vacuum filtered, dried and dehydrated at 120°C, roasted at 750°C for 3.5 hours, and the revived catalyst sample was obtained. Denoted as sample 2. The chemical element analysis, specific surface area and pore volume of the obtained revived catalyst were determined. See Figure 4 , Figure 5 .
Embodiment 3
[0031] Example 3: Select 3% impurity removal activator and spent catalyst to carry out controlled impurity removal reaction, the liquid-solid ratio is 6:1, the reaction time is 5 hours, the process pH is controlled at ≮1, the filter residue is deionized, pulp washed twice, and rinsed After 2 times, the filter residue was immersed in 0.05% boric acid and lanthanum nitrate solution, the immersion temperature was 45°C, the immersion time was 8 hours, vacuum filtered, dried and dehydrated at 120°C, and roasted at 760°C for 4 hours, the revived catalyst sample was obtained. Denoted as sample 3. The chemical element analysis, specific surface area and pore volume of the obtained revived catalyst were determined. See Figure 4 , Figure 5 .
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Application Information
- IPC
- B01J38/48; B01J38/60; B01J38/02; B01J38/00
- CPC
- B01J38/00; B01J38/02; B01J38/485; B01J38/60
- Inventors
- 卢国俭; 朱英杰