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Previous by Date: Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption Date: Thursday, May 9, 2019 at 8:40:18 AM Author: "Wilhelm, Monique" <mwilhelm**At_Symbol_Here**UMFLINT.EDU> |
Next by Date: Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption Date: Thu, 9 May 2019 14:07:00 +0000 Author: Yaritza Brinker |
All:
I am always impressed with research input on all problems discussed in this CHAS forum.
The perchloric acid fume hood is, relatively speaking,
rarely ordered from manufacturers who make fume hoods. This infrequency leads me to believe that other chemical procedures are generally available to do the chemistry since the perchloric hood option requires so much extra effort to install correctly,
use properly, and maintain professionally.
Please, PLEASE, review
research application carefully and validate that published research completely documents the steps used in a perchloric process. Most manufacturers will wish to discuss thoroughly such applications with customers before proceeding to process an order.
If there are other alternate ways to achieve favorable outcomes. These should be pursued first.
Dr. Bob Haugen
Director of Product and Technology Development
Flow Sciences, Inc.
910 332 4878
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From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU]
On Behalf Of Wilhelm, Monique
Sent: Thursday, May 9, 2019 8:40 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
I have an Analytical Chemist who also does fish oil research. He has never used perchloric acid. He has done some work with sulfuric acid hydrolysis, I believe.
If he will be heating this at all, a perchloric hood is a MUST.
Monique Wilhelm
Laboratory Manager
Department of Chemistry & Biochemistry
University of Michigan - Flint
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU]
On Behalf Of Mel -SmithCharlton
Sent: Wednesday, May 08, 2019 1:15 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Perchloric acid spill neutralization and absorption
Greetings everyone,
we have a researcher who will be using 70%-72% Perchloric acid, he is making a 1:1 mix with Glacial Acetic Acid for the hydrolysis of fish fats. In either case, we have some concerns with this because we do not have a perchloric acid hood
(separate issue). Now, once the mix is made, the Perchloric acid will be approximately 35% to 36%, however, my concern is with the possibility of a spill and the resulting waste from a spill. Neutralization first, yes, but then it is also recommended that
the spill NOT be absorbed with any combustible such as paper towels etc. I have thought perhaps diatomaceous earth, or a combination of neutralizer with diatomaceous earth, collect with standard non-metal dust pan then bag/tag the neutralized waste.
Does anybody have any experience with Perchloric Acid spills, neutralization and absorbents, and if so, what do you use?
thanks!
Melissa Charlton-Smith
MS-OSH/EM, NRCC-CHO
GOMEB & Associates
VP Lab Safety, Chemical Hygiene & Lab Management
Consultant
304-563-6678
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