aqua regia processing in SNF...

Mahnaz Mansourpour mahnaz at stanford.edu
Sun Mar 11 09:14:07 PDT 2012


Hi all,

Jim thanks for information.
Just to be sure, specmat, have not okay the process yet.
Robert , please attend the next CCB meeting, Thursday at 2:30.
i hope I have the time correct?

mahnaz
On 3/10/2012 12:30 PM, Jim McVittie wrote:
> Robert,
>
> Be very careful in using aqua regia. It can suddenly "spitted" acid out of a beaker. Mixing HCl and NHO3 forms a new stronger acid.  As a gradate student, I use to mix a gal of it up at a time for doing super cleaning of quartz ware. Over the years better methods were found for cleaning quartz. It was also used for cleaning Si before the advent of the RCA clean.   Jim
>
> ----- Original Message -----
> From: "Mahnaz Mansourpour"<mahnaz at stanford.edu>
> To: "Robert Huang"<roberth at quswami.com>, "Mahnaz"<mahnaz at stanford.edu>, Specmat at snf.stanford.edu, "maurice stevens"<maurice at stanford.edu>, "Uli Thumser"<uli at snf.stanford.edu>
> Sent: Friday, March 9, 2012 2:08:04 PM
> Subject: Re: aqua regia processing in SNF...
>
>
> Hi Robert,
>
> Mixing HCL and NHO3 is ok but why mix it with water?
> I am not sure how will react?
> Please give me more information.
>
> mahnaz
> On 3/9/2012 11:16 AM, Robert Huang wrote:
>
>
>
>
> Hi Mahnaz,
>
>
>
> So of course HCl and HNO3 are already approved chemicals in SNF. I assume it is then OK to mix them up in an aqua regia solution (3 parts HCL, 1 part nitric, and 2 parts water) for use at wbgeneral (our intent is at room temperature) as long as we follow the usual guidelines including proper labeling, correct?
>
>
>
> Regards,
>
>
>
>
> Robert Huang
>
> Director, Process and Device Technology
>
> QuSwami, Inc.
>
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>
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>
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>
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>
>
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>
> From: Robert Huang
> Sent: Thursday, March 08, 2012 1:05 PM
> To: 'Mahnaz Mansourpour'
> Subject: aqua regia processing in SNF...
>
>
>
> Hi Mahnaz,
>
>
>
> Is aqua regia (combination of HCl and HNO3) already an approved chemical in SNF? If so, what are the procedures including where it can be used?
>
>
>
> Regards,
>
>
>
> Robert Huang
>
> Director, Process and Device Technology
>
> QuSwami, Inc.
>
> 455 Mission Bay Blvd. South
>
> Building 3, Suite 125
>
> San Francisco, CA 94158
>
> W: (415) 834-9910
>
> M: (408) 854-0450
>
> F: (415) 834-9975
>
> Email: roberth at quswami.com
>
>
>
> **********************Privacy and Confidentiality Notice**********************
>
> The information contained in this communication is proprietary, confidential, copyright, trade secret of QuSwami, Inc. It is intended solely for the use of the individual or entity to whom it is addressed and others authorized to receive it. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or taking any action in reliance to the contents of this information is strictly prohibited.
>
> ******************************************************************************
>



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