Avalokita (Stranger)
05-26-04 18:10
No 509826
       Any OTC and renewable ethanol drying chemicals?     

Absolute Ethanol?

If my memory of a chemical catalogue I once read serves me, I read that Calcium Oxide and Molecular sieve 4A can be used for drying ethanol, but I was wondering if anyone knew of an OTC chemical that can be reused by drying it in an oven?

I read about Epsom Salts being used to dry isopropyl alcohol, and Dririte is available, so I am wondering if Epsom Salts or Dririte would work to dry ethanol? 		 
 
 
 
    methyl_ethyl
(Guardian)
05-26-04 19:54
No 509850
       Molecular Sieves     

Molecular sieves can be dried in the oven at 175 - 260C for the 3 angstrom bead.  Which would be ideal for drying ethanol.  They are OTC also, or at least the procurement of the sieves is not suspicious.

regards,

m_e
     Unipolar Mania, It's good for life... laugh 		 
 
 
 
    imp
(Hive Bee)
05-26-04 22:32
No 509872
       CuSO4     

UTSE better...

Post 412388 (Chimimanie: "(...) With this procedure the ordinary 95°...", Chemistry Discourse) 		 
 
 
 
    Shane_Warne
(Stranger)
05-26-04 22:53
No 509877
       Barium oxide maybe?     

BaO. The carbonate is common.

I don't know how completly it dries alcohol, but it is marketed for drying alcohol.

Maybee you could use something like BaO or CaO and then follow with something more visual like the CuSO4, that imp suggested. 		 
 
 
 
    gsus
(Hive Bee)
05-27-04 11:59
No 509958
       BaO     

BaO was the last step in the old days, after drying with CaO, and still is in some labs. BaO will get kinda hot with say 95%, CaO might also, though is fine after CuSO4. BaO will give quite anhydrous alcohol though, and storage over some is a good idea.
http://www.mindstates.org 		 
 
 
 
    wyndowlicker
(tourbee)
05-28-04 15:19
No 510108
       Drying ethanol     

HEy now,


 Here is a good place to take a look for the answers:

           Drying ethanol with molecular seives Post 508292 (wyndowlicker: "Drying ethanol with molecular seives", Newbee Forum)
tongue
The bus came by,and I got on.Thats when it all began. -GD 		 
 
 
 
    Osmium
(Stoni's sexual toy)
05-29-04 04:21
No 510162
       > "Any OTC and renewable ethanol ...     

> "Any OTC and renewable ethanol drying chemicals?"

The cheapest, most renewable and most OTC alcohol drying agent is CORN MEAL/GRITS.

http://www.journeytoforever.org/biofuel_library/ethanol_grits.html

Ground corn selectively adsorbs water to give anhydrous product from ethanol vapors containing between 1.6 and 50.9% water. An adiabatic corn adsorber system is characterized by formation of a combined wave front (the temperature and concentration waves elute from the column at the same time). Corn is stable under cyclic use when regeneration is carried out with air or N2 at 80 to 120 deg C. The energy required to regenerate the adsorbent is less than 1500 Btu/gal (528 kJ/kg) of anhydrous product obtained from ethanol vapor containing 7.4% water. Anhydrous product also results when water-containing vapors of n-propyl, isopropyl, or tert-butyl alcohol are passed over corn. Corn and other polysaccharide materials have potential as low-cost adsorbents for energy efficient water removal from alcohols.
BUSH/CHENEY 2004! After all, it ain't my country!
www.american-buddha.com/addict.war.1.htm 		 
 
 
 
    former_chemist
(Hive Bee)
05-31-04 14:20
No 510594
       Re: Any OTC and renewable ethanol ...     

I see a lot of bonuses to the cornmeal approach to drying ethanol.

One: a new cornbread recipe.
Two: the cornmeal can be used to make more ethanol.
Three: very environmentally friendly.
Four: very OTC.

One downside though: contamination.