How effective is butyl diglyme for extracting gold out of aqua regia?
Does it react badly (explosively) with nitric acid?
I've used diethyl ether on aqua regia before, and it appears semi-dangerous and somehow effective.
I let the aqua regia extract magnetite for a day, then add an equal amount of ether, mix, and decant the ether. Three times.
The aqua regia/ether mix warms up on the first addition and mixing of the ether, slightly warm to the touch. I don't think letting it sit like that would be wise or adding the ether fast and mixing vigorously would be wise either. But done slowly and carefully it doesn't seem to be too dangerous. I've done it several times and it always works to extract goldchloride.
(The aqua regia needs to be concentrated though. It doesn't appear to work when dilluted with water.)
The ether appears to extract gold (and maybe pgm's too, I don't know which kinds all dissolve in ether for those that dissolve in AR) but also iron (though a lot less than what remains dissolved in the aqua regia).
I would try butyl diglyme instead of diethyl ether and see what base metals it dissolves.
Does it seperate easily from aqua regia or goldchloride?
What about reactivity with hydrogen peroxide btw?