Difference controllable potassium nitrate crystal synthesis method based on cold shock mode
A technology of potassium nitrate and crystal, which is applied in the field of potassium nitrate crystallization, can solve the problems of poor crystal dispersibility, and achieve the effects of low cost, saving exploration cost, and easy large-scale production
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[0049] A kind of potassium nitrate crystallization method based on temperature gradient, comprising:
[0050] First add 8.5g NaNO to a 500mL beaker 3 And 7.5gKCl, then add 60mL distilled water. Put the beaker on the asbestos net, heat and stir with low heat to dissolve it, and then continue to heat and evaporate to 2 / 3 of the original volume. At this time, more crystals begin to precipitate in the beaker. Filtrate under reduced pressure while hot, and crystals appear in the filtrate soon. Take another 32mL of hot distilled water and add it to the suction filter bottle to redissolve the crystals, transfer the solution to a beaker and heat it slowly until it evaporates to 3 / 4 of the original volume, then add 20ml of absolute ethanol to divide the solution into 4 servings, crystals obtained with 4 cooling methods:
[0051] 1. Potassium nitrate crystals were prepared in an ice-water bath at 0°C, figure 1 . There are many crystal seeds, and the crystal size is small and irreg...
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