I have mixture (60% water) of CaO, Ca(OH)2 and CaCl2(its a waste for which I need to find proper use) I need to extract all of the components separately. How can I do this?
Calcium chloride is very soluble and can be washed out of the waste. However, be careful because the calcium oxide will react with water to become calcium hydroxide, giving out considerable heat. The end products will be a solution of calcium chloride with calcium hydroxide.as a solid, that can be filtered out. Then the water in the residual solution can be evaporated to obtain the calcium chloride. The latter is deliquescent and absorbs water from the air, so storage as a solid may be a problem. The solution is used to melt ice on roads in winter. The calcium hydroxide is the slaked lime that can be applied to reduce acidity in soils.
CaO reacts with the water, so no - you do not have CaO in your mixture. CaCl2 and Ca(OH)2 have very different solubilities, so your mixture is most likely CaCl2 dissolved in the water and then solid Ca(OH)2 in suspension. Just filtering it should do the trick.
Dear Mr. Kwiatkowski.
Did you achieve in separating the material?
Can you tell me the name of the company you were dealing with?
thank you in advance for answering to
t.mueller[Q]chemie.uni-siegen.de
About predicting the pH of Ca(OH)2 or CaCl2 aq. solutions (also for mixed solutions and for saturated Ca(OH)2 solutions, even if carbonated) ― cf. my posts at: https://www.researchgate.net/post/How-to-increase-pH-for-a-solution-without-making-a-chemical-reaction-with-CaCl2
- Badges
- Science topic
- Similar topics
- Analytical Chemistry
- Extraction