Preparation method for spectrograde calcium oxide
A calcium oxide, spectrally pure technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problem that it can only be used in pesticides, papermaking, food, petrochemical, and cannot meet the needs of the rapid development of the electronics industry. problems such as low purity of calcium oxide, to achieve the effect of improving market competitiveness, low cost and low impurity content
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Embodiment 1
[0017] A preparation method of spectrally pure calcium oxide, the steps of which are:
[0018] 1. Prepare ammonium carbonate solution:
[0019] 10kg of distilled water is put into a plastic barrel, and ammonia gas is fed to obtain ammonia water, and the relative density is controlled at 18 ° Be, and then carbon dioxide is fed, and the pH value is controlled at 8.5 to obtain an ammonium carbonate solution for subsequent use;
[0020] 2. Purification of calcium nitrate:
[0021] Put 2kg of calcium nitrate into 2000mL of distilled water, heat to dissolve at 50°C, adjust the pH value to 10 with calcium hydroxide, filter to obtain the purified calcium nitrate solution, and set aside;
[0022] 3. Synthetic calcium carbonate:
[0023] Heat the calcium nitrate solution purified in step 2 to 50°C, add the ammonium carbonate solution used in step 1 while stirring, control the pH value at 5, filter, add ammonium carbonate solution to the filtrate until the precipitation is complete, an...
Embodiment 2
[0027] A preparation method of spectrally pure calcium oxide, the steps of which are:
[0028] 1. Prepare ammonium carbonate solution:
[0029] 10kg of distilled water is put into a plastic barrel, and ammonia gas is fed to obtain ammonia water, and the relative density is controlled at 22 ° Be, and then carbon dioxide is fed, and the pH value is controlled at 9 to obtain an ammonium carbonate solution for subsequent use;
[0030] 2. Purification of calcium nitrate:
[0031] Put 1 kg of calcium nitrate into 1000 mL of distilled water, heat to dissolve at 60°C, adjust the pH value to 11 with calcium hydroxide, filter to obtain the purified calcium nitrate solution, and set aside;
[0032] 3. Synthetic calcium carbonate:
[0033] Heat the calcium nitrate solution purified in step 2 to 60°C, add the ammonium carbonate solution used in step 1 while stirring, control the pH value at 6, filter, add ammonium carbonate solution to the filtrate until the precipitation is complete, an...
Embodiment 3
[0037] A preparation method of spectrally pure calcium oxide, the steps of which are:
[0038] 1. Prepare ammonium carbonate solution:
[0039] 10kg of distilled water is put into a plastic bucket, feed ammonia gas to obtain ammonia water, control the relative density at 20 ° Be, then feed carbon dioxide, and control the pH value at 8.5 to obtain ammonium carbonate solution for subsequent use;
[0040] 2. Purification of calcium nitrate:
[0041] Put 1.5kg of calcium nitrate into 1500mL of distilled water, heat to dissolve at 55°C, adjust the pH value to 10 with calcium hydroxide, filter to obtain the purified calcium nitrate solution, and set aside;
[0042] 3. Synthetic calcium carbonate:
[0043] Heat the calcium nitrate solution purified in step 2 to 55°C, add the ammonium carbonate solution used in step 1 while stirring, control the pH value at 5.5, filter, add ammonium carbonate solution to the filtrate until the precipitation is complete, and wash the precipitate with...
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