I don't want to do anything right now. I'll read the book later, but I've already written this.
Does copper only knock out gold or does it also knock out silver?
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Martijn
Well-known member
Olom, great attitude!
When this book was written, the environment was not a big issue yet.
By now, most of humanity has learned not to poop in your own water well. Some parts of the world are still catching up.
Most sustances are only harmfull at certain concentrations, others can accumulate over time in your body or in nature and cause serious damage that way.
It usually comes down to emission limits. So much micro gram of a substance per cubic meter of expelled air. Or total amount per hour.
No economic way to measure that for the small guy.
Prevention is the biggest factor. No need to scrub fumes if they are not created
(in large quantities). So either slow reactions in semi closed vessels with low emissions or big and fast reactions which will require huge scrubbing systems.
So don't create a lot of fumes, and if you do, don't let them escape to open air without scrubbing them first. Have the fume hood there to get the traces of gasses and unintentional releases or accidents vented away from you.
But very good to hear you are aware of this and you want to limit the gases expelled.
When this book was written, the environment was not a big issue yet.
By now, most of humanity has learned not to poop in your own water well. Some parts of the world are still catching up.
Most sustances are only harmfull at certain concentrations, others can accumulate over time in your body or in nature and cause serious damage that way.
It usually comes down to emission limits. So much micro gram of a substance per cubic meter of expelled air. Or total amount per hour.
No economic way to measure that for the small guy.
Prevention is the biggest factor. No need to scrub fumes if they are not created
(in large quantities). So either slow reactions in semi closed vessels with low emissions or big and fast reactions which will require huge scrubbing systems.
So don't create a lot of fumes, and if you do, don't let them escape to open air without scrubbing them first. Have the fume hood there to get the traces of gasses and unintentional releases or accidents vented away from you.
But very good to hear you are aware of this and you want to limit the gases expelled.
Thanks for the answer!
We do not follow her advice regarding safety
I don't know what copy of her book you're reading, but when I cleaned up my versions, I also added several pages of warnings as an introduction to the book, where I point out some of the practices in the book that are no longer considered safe. You can find links to them in my signature line below.
Dave
Thanks! I downloaded the book from a Google search and translated it with deepl.
There are some errors in some of the versions on the internet. For example, in many cases, the original optical character recognition software interpreted iridium as indium because the "ri" was close together so it interpreted it as an "n". There are also missing parts of pages, and many places where it substituted some letters as asterisks and other special characters.
When I created my versions, I was able to compare everything to an original 1940 printing of the book, so it's a little more accurate.
Dave
When I created my versions, I was able to compare everything to an original 1940 printing of the book, so it's a little more accurate.
Dave
Thanks for sharing this with me!
Remember that the book was written in 1940 (actually it was written over a period of years and published in 1940). SMB was not used at that time, now was sulfamic acid to deNOX. Yes, a bit of sulfuric acid will drop any lead from solution. That is one of the advantages of using sulfamic acid. One of it's decomposition products is sulfuric acid, so it will deNOX a solution and also drop any lead.
C.M. Hoke was a lady. While she's often referred to as Ms. Hoke, she was actually married.
Dave
Thanks for the answer!
I think it was before the use of SMB was “invented”. She wrote about SO2 though which is the active ingredient in SMB.
It was written somewhere around 1940.
She was a brilliant “Teacher” in that she wrote it in a very accessible language and a way most people could relate to.
I’m too late again
You should pyrolize first, ie burn off the volatiles by high heat and no oxygen.
The gases can be burnt off by leading them back to the fire that crates the heat.
Then incinerate by high heat and plenty oxygen.
When done the will look whitish grey.
It is possible to grind them and gravity separate and then incinerate just the concentrates.
Thanks for the answer!
I burned these integrated circuits before, I burned them until they turned white-grey and then I ground the ashes into powder and washed them but there is a lot of carbon in them. If I got rid of the carbon, how should I process it afterwards, 25kg of metal and a lot of iron? I also want to recover the silver from it and use as little ar as possible to recover the gold.
After you have pyrolized them, most people grind them to a powder and remove Iron with a magnet.
Then they gravity separate them.
But search the forum and read it all.
There are days of reading and it is worth it.
Thanks!
