Everyone seems to be taking this the wrong way. I mean a squirt of butane
or propane from the can on to a stained item can help to dissolved and clean
the stain off.
Why the hell does everyone take things in the purely scientific scheme in
here. Things don't have to be broken down to the science of their workings
all the time, and it is mostly sufficient to make a statement that will work
without having to go into the pure science of how the stain is actually
created in the fibres of the item all the time.
Advice on things that work, as long as it's safe advice, is what this group
is all about. Why are all you scientist not doing some research work during
the day or night anyway? I think it's because you're all "know it alls" and
no one will work alongside you all.
A little squirt of from a can of butane on to a stain can help in removing
it. I know this works because I've used it on many occasions. I've never
had to take the item in to a pressure chamber so I can make the butane or
propane stay as a liquid, I've never had to because a simple little squirt
from a can has always been enough.
Now please, get a real life all of you. :-)
If in here, you mean :
uk.d-i-y,uk.rec.cars.maintenance,uk.rec.cars.misc then I dunno.
But over on sci.chem, that's what the newsgroup is all about. Read the
charter for the group in question before you crosspost. You can edit
out groups even as you reply.
Where do you find these 'cans' from which "a squirt of butane or
propane from the can" may be produced? All the propane and butane
that I've seen comes in pressurised containers.
Or am I being silly - can you get little cans of propane/butane for
filling lighters (which is where we came in).
Yes, cans of lighter gas are butane, and you can squirt liquid butane
from them. But this is of little use as a degreasing solvent - yes the
butane will dissolve the grease, but it will evaporate very shortly
afterwards, leaving the grease behind. A degreasing solvent needs to
carry away the grease it has dissolved in order for it to be useful.
However, I must say that when i tried this I found that the butane
gas evaporated so quickly that I barely get the chance to use it.
Maybe if I could use it then I would be able to wipe any dissolved
residue away with a cloth but unfortunately it is all eveoprated in a
few seconds and I can't do much with pressurized butane at all.
How do you get over the small matter of the boiling point of n-butane being
just below 0C ? (Iso-butane boils about 10C lower.)
A puddle of it might sit for some time at STP, but ultimately it will end up
as a gas.
Say something cutting and back it up with big people.
Ah. Difficult to distinguish from what you wrote!
As to the original point, were one in temperatures below freezing, I imagine
(though I have never tried it) butane would make a good solvent. Not
immensely practical though!
Perhaps one could keep a jamjar of liquid butane in the freezer (how to get
it in there??) and dunk things in it (after freezing them first, of course)
to degrease them. DONT TRY THIS AT HOME
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