Allure Demon Concubine: Doting the Crown Six Palaces

Chapter 734 Explosion
(3) Pour the nitrate water into a large evaporating dish, heat and evaporate (this step is called boiling nitrate), and keep stirring while heating to prevent sticking to the bottom and splashing. 
(4) Stop heating when 2/3 to 3/4 volume of water is evaporated.At this time, the solution is relatively viscous, and a small amount of solid has precipitated at the bottom of the evaporating dish.Use a glass rod to take a drop of the solution and drop it on the paper. If the solution immediately condenses into a ball, it means that the requirement has been met, and it should be filtered while it is hot.At this time, the temperature is very high, and potassium nitrate will not precipitate due to its high solubility, while sodium chloride, potassium chloride, etc. will precipitate due to their low solubility.

(5) Allow the filtrate to cool naturally to 30°C. At this time, the solubility of potassium nitrate is most affected by temperature, and the solubility drops sharply and a large amount of precipitation occurs.The solubility of salts such as sodium chloride has little change, and basically no precipitation.Suction filtration again to obtain potassium nitrate crystals.For further purification, it can be recrystallized again. 
[The above are all the information I found on the Internet, these are the process of making potassium nitrate, but Leng Han has never tried it, haha, dear friends, don’t argue with me on this issue, anyway, I want Xiaoxia to make it Fireworks are just fine, huh, huh. 】

After half a day of tossing, I was so tired that I was sweating profusely, but in the end it seemed that the potassium nitrate was really extracted by me.So now we just need to get gunpowder and potassium nitrate together? 
The process of making my gunpowder made me more careless, and I don't know what happened anyway. When I put these two things together, I forgot that the potassium nitrate was still heating in the evaporating vessel.
There was a sound of 'jumping', and I felt that I understood that my mouth was smoking. 
Xue Lian seemed to have heard the voice, and immediately broke into the door. "Xiaoxia, are you okay?" 
Is there anything wrong?I don't know either, but I still smiled and said to Xuelian: "It's okay, it's okay."

(End of this chapter)