Re: ORGLIST: How to estimate peroxide content in colored THF

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From: A De (ocad$##$mahendra.iacs.res.in)
Date: Thu Mar 30 2000 - 23:35:23 EST

Calcutta, March 31, 2000
Keep it over good quality KOH. You may have to repeat a couple of times.
When the colour is gone do the KI/HCl test and finally carry out the
standard benzophenone ketyl procedure.
Cheers
Asish
Professor Asish De
Dept. of Organic Chemistry
Indian Association for the Cultivation of SCience
Calcutta - 700 032
INDIA

On Thu, 30 Mar 2000, Dr. D.Basavaiah-(RS) wrote:

>
> Dear Colleagues:
> I have large quantitiy of colored THF that has to be recovered. Before
> distillation I want to make sure that the peroxide content is within 40ppm
> limit. In the standard test, KI/HCl, we do not get quantitative
> information.
> Also, I wonder how to get rid of the peroxide, if the peroxide limit is
> beyond the limit. We cannot use alumina since it leads to enormous loss of
> solvent.
> I thank you in advance for the information
> Krish M. Chary
>
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