On Thu, 04 May 2006 16:01:37 +0200, Dave <
wa4qal@...> wrote:
> Ferric Hydroxide sinks. That's the brown, muddy
>
> stuff that forms when you etch boards with Ferric
>
> Chloride. The Copper shouldn't percipitate out
>
> and sink, unless something is seriously wrong, such
>
> as WAY too much of the wrong kind of Copper Chloride
>
> and not enough of the good kind.
I must have missed the reference to ferricc chloride, i was thinking we
talk about CuCl.
>
> You really don't want to bubble gaseous Chlorine
>
> through a solution in anything short of an industrial
>
> setting, with a medical and emergency response team
>
> on hand.
Yes, that's why i wrote "if you are keen on fatal accidents".
My point was, it is possible, so chlorine is basically what is doing the
regenerating.
>
> Ack! NO! Fishkeepers don't dissolve CO2 into the
>
> water. That would kill the fish! They bubble air
>
> through the bubbler to dissolve Oxygen into the
>
> water. Fish breathe Oxygen, and expel Carbon
>
> Dioxide.
Go and get your facts straight before you tell someone he is wrong.
Google for "CO2 reactor".
This is not about what fish breathe, it is about the method used by
fishkeepers to dissolve CO2 into water. I'm well aware fish do not breathe
CO2, plants do, but that is besides the point.
There is no point in having a downstream reactor for oxygen, air is cheap
and can just be bubbled upwards and left to escape.
That's probably what you have seen and assumed i mean.
>
>
> I think it's been proposed that a similar system
>
> could be used for etchants. However, rocks probably
>
> don't work so well, since they may tend to dissolve
>
> when confronted by the Copper Chlorides and even
>
> some free Chlorine in the water. Plastic spheres
>
> might work, though.
Marbles, like in glass marbles. Like i wrote, they use marbles.
Round, made from solid glass. I think now you get me.
>
> As for electroplating the Copper out, I tried that
>
> once with some spent Ferric Chloride solution. It
>
> mostly kind of worked, since I deposited Copper
>
> crystals (Yes, metallic crystals of Copper, probably
>
> because I was running the current density WAY too
>
> high for a smooth plating, but, then again, I wasn't
>
> really trying for a smooth plating.). In my case,
>
> rather than using a Carbon electode (and risk
>
> producing Chlorine gas), I used an Iron electrode
>
> with the idea of producing Ferric Chloride. I don't
>
> know that that happened (although I don't remember
>
> producing any Chlorine gas bubbles), so from that
>
> aspect, the experiment was mostly a failure. But, it
>
> did pull the Copper out of the solution, which I
>
> viewed as a plus, since that meant that I wasn't
>
> pouring Copper containing solutions down the drain
>
Well, you can't use an iron electrode with CuCl, which i thought is what
we are talking about..
ST