A kind of moo2/caso4 composite material and its application
A composite material, a certain amount of technology, applied in other chemical processes, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of desulfurization gypsum ecological damage, large environment, pollution, etc., achieve high yield and simple operation , The effect of short production cycle
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Embodiment 1
[0038] First, 83.3mL of concentrated hydrochloric acid (37.5wt%) was prepared with 416.7mL of deionized water into a 2.0mol / L dilute hydrochloric acid solution, and desulfurization gypsum with an equivalent concentration of 10.0g / L was added under normal temperature stirring, and the mixture was heated at 120.0°C After acidifying for 4.0 hours, cool to room temperature and filter. The filtrate is recrystallized with ethanol and then filtered twice. The filter cake is washed with ethanol and dried at 70.0°C to obtain a pure calcium sulfate product. Next, add 20 mL of ethanol to a concentration of 40 mL. Add ammonium heptamolybdate with an equivalent concentration of 48.0g / L and purified calcium sulfate product with an equivalent concentration of 30.0g / L to the hydrochloric acid solution of 3.0mol / L, react hydrothermally at 130.0°C for 10.0 hours, cool to room temperature and filter , and then directly filter and rinse the obtained composite filter cake with ethanol at room tempe...
Embodiment 2
[0049] First, prepare 166.7mL of concentrated hydrochloric acid (37.5wt%) with 333.3mL of deionized water into a 4.0mol / L dilute hydrochloric acid solution, add desulfurized gypsum with an equivalent concentration of 25.0g / L under stirring at room temperature, and the mixture is heated at 150.0°C After acidifying for 6.0 hours, cool to room temperature, filter, and recrystallize the filtrate with ethanol for secondary filtration. After the filter cake is washed with ethanol, it is dried at 80.0°C to obtain a pure calcium sulfate product; secondly, add 10 mL of ethanol to a concentration of 20 mL. Add ammonium heptamolybdate with an equivalent concentration of 64.0g / L and a purified calcium sulfate product with an equivalent concentration of 40.0g / L to the hydrochloric acid solution of 4.0mol / L, react hydrothermally at 150.0°C for 13.0 hours, cool to room temperature and filter , and then directly filter and rinse the obtained composite filter cake with ethanol at room temperatu...
Embodiment 3
[0052]First, 208.3mL of concentrated hydrochloric acid (37.5wt%) was prepared with 291.7mL of deionized water into a 5.0mol / L dilute hydrochloric acid solution, and desulfurized gypsum with an equivalent concentration of 50.0g / L was added under stirring at room temperature, and the mixture was heated at 180.0°C After acidifying for 12.0 hours, cool to room temperature and filter. The filtrate is recrystallized with ethanol and then filtered twice. The filter cake is washed with ethanol and dried at 85.0°C to obtain a pure calcium sulfate product; secondly, add 25 mL of ethanol to a concentration of 50 mL. 5.0mol / L hydrochloric acid solution, then add ammonium heptamolybdate with an equivalent concentration of 80.0g / L and purified calcium sulfate product with an equivalent concentration of 50.0g / L, hydrothermally react at 180.0°C for 16.0 hours, cool to room temperature and filter , and then directly filter and rinse the obtained composite material filter cake with ethanol at ro...
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