From: Denise Beautreau <deb313**At_Symbol_Here**LEHIGH.EDU>
Subject: Re: [DCHAS-L] neutralizing ammonium sulfide
Date: Sun, 2 Aug 2020 12:39:04 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: CAG948wG4TCX+5XvJwr2nFgV4RkG3cs11k_jwcGrAdqpcatvRJg**At_Symbol_Here**mail.gmail.com
In-Reply-To <1946609633.326427.1596363536077**At_Symbol_Here**mail.yahoo.com>


Monona is correct. If the the "neutralization" is not part of the process/reaction doing so after the fact is waste treatment and cannot be done without being licensed to do so. For example, students would do a Hess's Law experiment mixing HCl and sodium bicarbonate. At the end of the lab, I can "neutralize " the collected waste as that occurs secondarily as part of the experiment.


Denise

On Sunday, August 2, 2020, Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**lists.princeton.edu> wrote:
I think this is called waste treatment and not allowed without a license. Monona


-----Original Message-----
From: JOHN L STRAUGHN <0000120dde6ec15c-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Sent: Sun, Aug 2, 2020 05:34 AM
Subject: Re: [DCHAS-L] neutralizing ammonium sulfide


I'd try this: small scale, look for sulfur precipitation (may clear with further addition of peroxide), nitrogen gas bubbling and further NOx generation (red-brown fumes, ie. in a hood) possible. Get a recipie that works and share it in glory!

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> on behalf of 00000eca7dd1d088-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU <00000eca7dd1d088-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Sent: Friday, July 31, 2020 12:06 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Subject: Re: [DCHAS-L] neutralizing ammonium sulfide
You might look into adding hydrogen peroxide, perborate or some persulfate derivative.

Dan



-----Original Message-----
From: Nickie Norton <nnorton**At_Symbol_Here**SHEPCHEM.COM>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Fri, Jul 31, 2020 10:35 am
Subject: [DCHAS-L] neutralizing ammonium sulfide

Hi All,
We are using ammonium sulfide in excess in a reaction in water. What is the proper way to dispose of the aqueous ammonium sulfide? We are concerned that if we add bleach we will make chloramine. Does anyone have a way to convert the ammonium sulfide to ammonium sulfate?
Thank you,
Nickie Norton
Research Chemist
The Shepherd Chemical Company
513-842-9332
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