wow another person that also seemed to over look part of the book they or Maybe the two of you should look at these parts of the books.
66 REFINING PRECIOUS METAL WASTES
suitable when green gold is soldered to, or mixed with, platinum,
as in the case of platinum topped jewelry with a green-gold base.
You are already familiar with the idea of inquartation, or adding
enough silver, copper, or brass, to reduce the gold content to 25%
or less. This is the usual plan when green gold is refined.
The other alternative, of melting it up with some metal that will
make it soluble in aqua regia, is not so popular, but the student
should understand it. A button that contains more than 12% silver
is very slow to dissolve in aqua regia. With silver as low as 8%,
aqua regia works readily enough, especially if hot. (We are as
suming that the other constituents are metals that are themselves
soluble in aqua regia, such as gold, copper, zinc, or nickel.) We
can easily imagine a situation wherein a jeweler might have on
hand a little green gold, and considerable yellow gold, red gold, or
fine gold. By melting all these together he would obtain a button
of less than 12% silver, that would dissolve in aqua regia, and that
could be refined by familiar methods. This part used inquarting and AR.
A third plan, suitable to the average shop, is to use cheap scrap
as the added material in the inquartation of high grade scrap, as
described in Chapter VI. This gives the worker a button similar
to that described in Chapter VI except that it probably contains
tin and lead.In a shop that handles gold and silver only no platinum-group
metals this is an excellent scheme so long as the worker understands
the effects of the tin and lead, and knows how to get rid of them.
We urge the student to become familiar with this plan, as he will
have many opportunities to use it.In which geo said it my be lead. So for the only real help out this thread.
For your first refining of cheap scrap rolled gold, filled gold,
electroplated goods, or goods that have been repaired with soft
solder we suggest that you employ this modified acid method,
which will now be described fully, in order to learn to recognize
the effects of tin and lead, and to get rid of them. Having learned
these important things, you can then use the method of inquarta
tion when desired, as it employs the same general principles.
In a shop that handles gold and silver only no platinum-group
metals this is an excellent scheme so long as the worker understands
the effects of the tin and lead, and knows how to get rid of them.
We urge the student to become familiar with this plan, as he will
have many opportunities to use it.
For your first refining of cheap scrap rolled gold, filled gold,
electroplated goods, or goods that have been repaired with soft
solder we suggest that you employ this modified acid method,
which will now be described fully, in order to learn to recognize
the effects of tin and lead, and to get rid of them. Having learned
these important things, you can then use the method of inquarta
tion when desired, as it employs the same general principles.
I'm not leaving this updated for the Two that have decided to give there rather poor responses.
But rather for the people that are trying to learn and have realized that most people here are not really here to help.
But are more likely waiting for someone to come up with another method or explain another reaction.
But tell you to try these experiments. Unlike the response you will get here of go read the book. or understand the book first. I think Hokes would have laughed and that response. Either way It may be tin and lead in which I will try sulphuric acid or 50/50 hydrogen peroxide and hydrochloric acid.
I have nothing to loss by trying different methods. And there better forum were people seem to under the other methods. I see why new people seem to take issue with geo. And remember never say never.
I hope this helps some new people.