Biomass knot residue composite tailing slag solid alkali catalyst, and preparation method and application thereof
A solid base catalyst, biomass technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of large catalyst consumption, long reaction time, high temperature and high pressure and other problems, to achieve the effect of strong alkaline site enhancement, uniform distribution, and enhanced thermal stability
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Embodiment 1
[0027] After crushing, sieving, and drying, wheat straw with a particle size of 40-60 meshes is slagged, and dried at 100°C for 2 hours in an air atmosphere;
[0028] Take 20g of tailings slag from Jinchuan copper-nickel mine, crush and grind, add 100ml of 1mol / L hydrochloric acid solution, and dissolve at room temperature for 12 hours under the stirring condition of 100-500rpm, the metal oxides or their compounds contained in the tailings slag are basically Dissolve, filter, and use 2mol / L NaOH solution as a precipitant to drop the filtrate dropwise into the filtrate. When the pH reaches 8, the titration end point is reached. Continue to stir for 1 h, let stand for 1 h, dry at 90°C for 6 h, wash with deionized water, dry, and grind to pulverize.
[0029] Mix wheat straw slagging and Jinchuan copper-nickel ore tailings slag in 50% ethanol aqueous solution at a mass ratio of 3:1, stir and age for 1 hour, dry at 90°C for 1 hour, and then dry at 10°C under nitrogen protection. C...
Embodiment 2
[0031] Take peanut shells with a particle size of 40-60 mesh after crushing, sieving, and drying, and dry them at 100°C for 2 hours in an air atmosphere;
[0032]Take 20g of tailings slag from Jinchuan copper-nickel mine, crush and grind it, add 100ml of 12mol / L nitric acid solution, and dissolve it at room temperature for 12 hours under the stirring condition of 100-500rpm, the metal oxides or their compounds contained in the tailings slag are basically Dissolve, filter, and use 12mol / L KOH solution as a precipitating agent to drop the filtrate dropwise into the filtrate. When the pH reaches 13, the titration end point is reached. Continue to stir for 1 hour, let stand for 1 hour, dry at 130°C for 6 hours, wash with deionized water, dry, and grind to pulverize.
[0033] Mix peanut shell slagging and Jinchuan copper-nickel ore tailings slag in 50% ethanol aqueous solution at a mass ratio of 5:1, stir and age for 1 hour, dry at 90°C for 1 hour, and then dry at 10°C under nitrog...
Embodiment 3
[0035] Take aspen slagging with a particle size of 40-60 mesh after crushing, sieving, and drying, and dry at 100°C for 2 hours in an air atmosphere;
[0036] Take 20g Jinchuan copper-nickel mine tailings, crush and grind, add 1000ml of 1mol / L sulfuric acid solution, under the stirring condition of 100-500rpm, dissolve at room temperature for 12 hours, the metal oxides or their compounds contained in the tailings slag are basically Dissolved, filtered, and the filtrate was dripped into the filtrate dropwise with 7mol / L sodium carbonate solution as a precipitating agent. When the pH reached 13, the titration endpoint was reached. Continue to stir for 1 hour, let stand for 1 hour, dry at 100°C for 6 hours, wash with deionized water, dry, and grind to pulverize.
[0037] Mix poplar slag and tailings slag in 50% ethanol aqueous solution at a mass ratio of 4:1, stir and age for 1 hour, dry at 90°C for 1 hour, and then heat up at a rate of 10°C / min under nitrogen protection Calcine...
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