Method for recycling expired zinc gluconate
A technology of zinc gluconate and zinc gluconate oral liquid, which is applied in the preparation/purification of carbon, zinc oxide/zinc hydroxide, negative electrodes, etc., and can solve problems affecting plant growth, soil deactivation, human and animal hazards, etc. , to achieve the effect of simple process and environmental friendliness
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Embodiment 1
[0021] A method for recycling expired zinc gluconate, which uses hydrothermal carbonization and high-temperature carbonization to recycle expired zinc gluconate to obtain a black ZnO / C composite material. Specifically, firstly, the expired zinc gluconate oral liquid is prepared by adding water Zinc gluconate solution with a concentration of 0.003g / mL was transferred to a hydrothermal reaction kettle with a polytetrafluoroethylene liner and subjected to a hydrothermal reaction at 200°C for 5h to obtain black particles, and then the black particles were heated at 800°C in a nitrogen atmosphere. Decarbonize for 1 hour, cool to room temperature, wash with water, and vacuum for 70 o After drying C for 5 h, black ZnO / C composites were obtained.
[0022] The microscopic morphology of the black ZnO / C composite obtained by SEM testing, such as figure 1 shown. Depend on figure 1 It can be seen that the black ZnO / C material is microspherical microscopically, with a particle size of ab...
Embodiment 2
[0024] A method for recycling expired zinc gluconate, which uses hydrothermal carbonization and high-temperature carbonization to recycle expired zinc gluconate to obtain a black ZnO / C composite material. Specifically, firstly, the expired zinc gluconate powder is mixed with water to prepare 0.06g / mL zinc gluconate solution, then transfer the zinc gluconate solution to a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and conduct a hydrothermal reaction at 180°C for 6h to obtain black particles, and then the black particles are heated in a nitrogen atmosphere Pyrolysis and carbonization at 750°C for 1 hour, after cooling to room temperature, wash with water and vacuum for 70 o C dried for 5.5 h to obtain a black ZnO / C composite.
[0025] The black ZnO / C composite material element composition that adopts EDX technology test present embodiment to obtain, as figure 2 shown. Depend on figure 2 It can be seen that the ZnO / C composite material mainly contains...
Embodiment 3
[0027] A method for recycling expired zinc gluconate, which uses hydrothermal carbonization and high-temperature carbonization to recycle expired zinc gluconate to obtain a black ZnO / C composite material. Specifically, firstly, the expired zinc gluconate particles are dissolved in water , prepared into a 0.06g / mL zinc gluconate solution, and transferred to a polytetrafluoroethylene-lined hydrothermal reaction kettle at 200°C for 7 hours to obtain black particles, and then the black particles were heated at 850°C in a nitrogen atmosphere Decarburization for 1 hour, cooling to room temperature, washing with water, and drying in a blast dryer at 50°C for 6 hours to obtain a black ZnO / C composite material.
[0028] The black ZnO / C composite material crystal phase that adopts XRD test present embodiment to obtain, as image 3 shown. Depend on image 3 It can be seen that the diffraction peak of zinc oxide is strong and sharp, corresponding to the standard XRD spectrum of zinc oxi...
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