Thanks, David. Yes, after further investigation it seems that link is a little confusing. I'm sending them an email describing the problem.
I don't know much about nothing... just trying to understand what's going on here.
CaO seems to be "lime or unslaked lime" like you've stated...
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oxide:
1 and 2) A white, caustic, lumpy powder used in analytical and manufacturing procedures, in glassmaking, in waste treatment, in insecticides, and as an industrial alkali. Also called lime.
3) A white crystalline oxide used in the production of calcium hydroxide.
Calcium hydroxide is defined as:
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Ca(OH)2 = "slaked lime, lime"
2) a caustic substance (Ca(OH)2) produced by heating limestone [syn: lime, slaked lime, hydrated lime, calcium hydrate, caustic lime, lime hydrate]
Compare to: CaO = "lime, unslaked lime, quicklime"
Lime is defined as:
- See calcium oxide.
- Any of various mineral and industrial forms of calcium oxide differing chiefly in water content and percentage of constituents such as silica, alumina, and iron. Also called quicklime.
I think what were seeing is that there may not be a standard for the words hotlime. Maybe in certain industries it's used in one mannerism and maybe in other industries it is used in another manner. I don't know. But the lack of a formal definition could easily result in different people using it to mean different things.
The words hotlime, hot-lime and "hot lime" were not found in the dictionary at dictionary.com. The word "burnt lime" is used to refer to lime/limestone (CaO), which is used to make "calcium hydroxide" as you have indicated.
And one other confusing issue is there is no formal definition for hydrated calcium hydroxide. Because I don't see a formal definition for that, and there is reference to hydrated lime which would be hydrated calcium oxide. After all, hydrated Ca(OH)2 means hydrated (combined with water) ? Maybe that is a misnomer ? I see it at various other websites but it's definitely confusing, because prefixing it with hydrated means you are hydrating slaked lime, which in turn was hydrated calcium oxide.
Those are the two very confusing issues I'm reading.