Ok I did more research and found a few answers.
To Op- a historical name for sulfuric (or sulphuric- alternitave names) is Oil of Vitriol, so maybe someone confused that with some thing mineral based.
- to the whole freezing batteries situation- I didn't see how the acid would be removed, leaving water- actually what happens is the opposite acording to my reaserch.
#1 automotive sulfuric acid is about 35% acid
#2 100% sulfuric acid becomes a solid at 50°f, and boils at 639°f and will break down at that point.
#3 when sulfuric acid is diluted with water it will drop the temperature that the acid becomes a solid. The % of the mixture will vary the temp that it becomes solid- pretty much works the opposite of a water / antifreeze mixture.
#4 when water evaporates from the acid/water mixture (which can happen at room temps- but much more effecient when at a higher temp) it the acid gains a higher concentration.
#5 that is why you add water to a battery- not acid- acid will kill it
#6 that is why hot and cold is hard on car batteries- the heat under the hood in summer evaporates the water out of the acid, and left unchecked come winter the more concentrated acid turns to a solid at a warmer temp than normal.
#7 when heat is added to a sulfuric acid in a solid form it liquifys extremely quickly- so that is why you don't jump start a "frozen" battery
#8 most people, including my self untill now don't know this and this is why they say the battery can "freeze" - which according to what I have seen in my research is the acid is just turning to a solid. I guess its a freeze of sorts but more apropriatly called "a solid"
#9 the battery acid/water mixture can freeze- but like turbs said it is a extremely low temp like in the -70°s range- which most of us will never see.
#10 a slow warm up of a battery in a solid state- not like in #9 can bring the acid back to a liquid and more usable state.
I'm done now- all this makes more scence now. Btw the oppinion based answers on the web are of no help, but the scientific info on the web brings clarity to it- just look at acid info, all the battery info seems to be opinions.
Millertime over and out for good on this topic.