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Groups > comp.sys.acorn.misc > #3231

Re: RiscPC problem

From Russell Hafter News <see.sig@walkingingermany.invalid>
Newsgroups comp.sys.acorn.misc
Subject Re: RiscPC problem
Date 2012-01-05 11:21 +0000
Organization Russell Hafter Holidays
Message-ID <524cc26ad7see.sig@walkingingermany.invalid> (permalink)
References (5 earlier) <5247e06e5cdave@davenoise.co.uk> <70c3db4852.news@user.minijem.plus.com> <524a402cddRichard@Torrens.org.uk> <524c65299esee.sig@walkingingermany.invalid> <66a5ba4c52.Philip@borehamh.demon.co.uk>

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In article <66a5ba4c52.Philip@borehamh.demon.co.uk>, Philip
Draper <Philip@borehamh.demon.co.uk> wrote:

> In message <524c65299esee.sig@walkingingermany.invalid>
>           Russell Hafter News
> <see.sig@walkingingermany.invalid> wrote:

> > I hate to think what the HSE would have thought of our
> > standard practice of a 5l beaker being filled with 2.5l
> > of sulphuric acid, pptassium dichromate being added and
> > the beaker just parked at the back of the bench so that
> > the cruddy flasks could be dropped in.

> People who used 'chromic acid' always ended up with
> beautiful lacy lab coats.

Nobody I knew or worked with, either at Oxford, Stirling or
the University of Vermont wore lab coats. But yes, my jeans
did quickly gain a *few* holes. But usually not a major
problem if you were careful.

> But that oxidation state of chromium an established
> carcinogen (apart from being very corrosive) and is not
> encouraged - to say the least.

That is the case now, but certainly not then. Ammonium
dichromate volcanos were a regular part of childhood
Christmases (bought from toy shops), as well as part of my
teacher training in 1972 and pretty much part of the
curriculum in the early 1980s.

Then more or less overnight it was decreed carcinogenic.

> Re your other message: while you can indeed oxidise IPA
> to acetone, recovering the product would not be
> straightforward would it? Not the sort of thing you can
> do in the bath, which is (if I remember correctly) where
> the people who blew up the Tube made their explosive.

That is what we were told, but I am not at all sure that
what we were told was the full story, by any means. A lot of
the discussions about the hydrogen peroxide used did not
make sense to me, and some of the syntheses found by a quick
google are pretty vague on that point.

-- 
Russell
http://www.russell-hafter-holidays.co.uk
Russell Hafter Holidays         E-mail to enquiries at our domain
Need a hotel? <http://www.hrs.com/?client=en__blue&customerId=416873103>

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RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-22 15:46 +0000
  Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-22 16:28 +0000
    Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 00:30 +0000
      Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-23 10:02 +0000
        Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2011-12-25 19:51 +0000
          Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-26 02:02 +0100
            Re: RiscPC problem Dev <spam-addy@no.spam.invalid> - 2011-12-26 09:31 +0000
              Re: RiscPC problem Dave Symes <dave@triffid.co.uk> - 2011-12-26 18:38 +0000
                Re: RiscPC problem Chris Shepheard <chris.shepheard@chrispics.co.uk> - 2011-12-26 18:54 +0000
                Re: RiscPC problem Dave Symes <dave@triffid.co.uk> - 2011-12-26 21:16 +0000
                Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-03 21:05 +0000
                Re: RiscPC problem Chris Shepheard <chris.shepheard@chrispics.co.uk> - 2012-01-03 21:36 +0000
                Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-03 23:50 +0000
                Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2012-01-04 09:06 +0000
                Re: RiscPC problem cferris@freeRemoveuk.com.invalid - 2012-01-04 09:41 +0000
                Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2012-01-04 09:52 +0000
                Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-04 18:14 +0000
                Re: RiscPC problem Brian Carroll <bric-nospam@argonet.co.uk> - 2012-01-04 14:21 +0000
            Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2011-12-26 17:07 +0000
              Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2011-12-26 18:41 +0000
            Re: RiscPC problem Alan Dawes <alan.dawes@argonet.co.uk> - 2011-12-26 21:07 +0000
          Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-26 23:56 +0000
            Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2011-12-27 12:18 +0000
              Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-01 16:11 +0000
            Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-27 12:26 +0000
          Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-26 23:48 +0000
            Re: RiscPC problem Richard Porter <dontusethis@address.uk.invalid> - 2011-12-28 21:33 +0000
              Re: RiscPC problem Chris Evans <chris@cjemicros.co.uk> - 2011-12-30 10:55 +0000
                Re: RiscPC problem charles <charles@charleshope.demon.co.uk> - 2011-12-30 12:20 +0000
                Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-30 13:25 +0000
              Re: RiscPC problem Richard Torrens <Richard@Torrens.org.uk> - 2011-12-31 14:26 +0000
                Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-01 16:09 +0000
                Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-03 21:16 +0000
                Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-04 18:22 +0000
                Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2012-01-04 20:34 +0000
                Re: RiscPC problem Chris Johnson <chrisjohnson+news@spamcop.net> - 2012-01-04 20:38 +0000
                Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-04 22:52 +0000
                Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2012-01-05 09:56 +0000
                Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-05 11:21 +0000
  Re: RiscPC problem druck <news@druck.org.uk> - 2011-12-22 17:40 +0000
    Re: RiscPC problem druck <news@druck.org.uk> - 2011-12-22 17:41 +0000
    Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 00:28 +0000
      Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-23 07:49 +0100
    Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-23 07:44 +0100
      Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 11:36 +0000
      Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 12:01 +0000
  Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-22 20:07 +0000
    Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-23 08:08 +0100

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