"Morgans" wrote in message
...

"Cubdriver" wrote

Well, the alky presumably was shipped in full tanks / barrels /
whatever, so we can hope it's undiluted.

But, it is _very_ difficult (it takes some expensive chemistry tricks) to
get all of the water distilled out of alcohol, in other words, stronger
than
around 98% alcohol. Is that all the alky producers go for, or do they use
the expensive tricks to get the last two percentage points of water out of
the alky?
--
Jim in NC


I don't know whether they do any initial distillation, to get to
approximately the 60% (or 120 proof) level, but the rest is apparently now
done by filtration through molecular sieves. The process is far less
expensive than distillation and achieves about 99% purity.

Various sources are offering a variety of grades of pure ethanol, up to
99.9%--although that does get expensive. Here is just one of the many links
that I found with Google:
http://www.alibaba.com/catalog/11549..._Grade_Bio_Eth
anol.html

Peter