Non-Chemical How to refine kt gold ( for dummies )

[Palladium]

I think noxx is talking about the micron size of the filter paper for the silver.

 

[Palladium]

Coffee filter should work. won't it ?

 

[goldsilverpro]

I don't think the micron size of the paper makes much difference, within reason, of course. In my experience, if you you run the same solution, over and over, through the filter, the filter will eventually clog, and the solution will run clear.

 

[Harold_V]

I don't think the micron size of the paper makes much difference, within reason, of course. In my experience, if you you run the same solution, over and over, through the filter, the filter will eventually clog, and the solution will run clear.

That was true in my experience.

I never used coffee filters----preferred to use Whatman #2 unless I was re-refining my gold, at which time I used a Whatman #5. They cost more, but they do one hell of a job. I rarely had to wait for a filter to load so it wouldn't pass any of the miniscule particles, and if people would learn the art of incineration and using an HCl wash prior to dissolution, all of the problems that plague filtration would be eliminated, anyway.

You won't read about the HCl wash in any book I've ever read-----it is something I developed when I had difficulties filtering solutions.

The closest I got to using a coffee filter was when I'd filter solutions from very dirty material, such as polishing wastes, at which time I'd use S&S Sharkskin. The solution from this material was then evaporated, and filtered with a #2 prior to precipitation. Again, you pay more, but they do the job, and it takes only one. Best part is they fit the funnels properly.

Harold

 

[CarlClassen]

Thank you for answering that GSP. I was trying to figure out that one for a quite a few days...

 

[goldsilverpro]

My all-time favorite paper was S&S 596. It was cheap, fast, strong, fairly retentive, and stood up well to acids. They stopped making it for awhile, but I think they're making it again.

 

[aflacglobal]

 

[gold4mike]

bump :idea: