Date: Thu, 9 Apr 2009 15:59:05 -0400
Reply-To: "Dr. Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Dr. Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Subject: Re: Mixtures of Oleum and Perchloric acid
Comments: To: Little Helga

Whether or not you mix 70% perchloric acid with Oleum in any proportions depends on your desire or reluctance to make (if you are a male) your wife a widow.
Very few males have such intentions.  I recommend that you follow their example.
Jay Young
PS: In case you have missed my point--DON'T MIX!
----- Original Message -----
From: Little Helga
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Sent: Wednesday, April 08, 2009 6:51 PM
Subject: [DCHAS-L] Mixtures of Oleum and Perchloric acid

Does anyone know of a potential hazard of mixing 70% perchloric acid with oleum (% SO3 to react with most of the water in the perchloric acid).
The research group is trying to make ~100% sulfuric acid and ~100% perchloric acid to oxidize small quanities of carbon (graphite) at temperatures ranging up to 70 C. The group understands the usual problems with handling oleum and they know that 100% perchloric acid by its self is a major safety problem.
Concentrations of the "100% perchloric acid" would be in the range of 10 to 30% in the oleum.
Bob Small
RS Associates
Tucson, AZ

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