NobleMetalsRecovery
Well-known member
"Wet ashing" seems to be the name given for dissolving with boiling concentrated sulfuric acid the epoxy cases on IC's, i.e., memory chips on ram memory sticks.
I tried this recently with some very promising results. So nice to see the gold wires still intact after dissolving the encapsulating epoxy. I would like to find a good way to deal with the fumes coming off of boiling concentrated sulfuric acid.
My first thought is to do this under an inverted large glass bowl of sorts. Have it resting in a container filled with sand, and have the sand saturated with a solution of sodium hydroxide. Then as the fumes build up pressure and escape through the sand and are forcing their way through the sodium hydroxide solution, the sulfuric acid should be neutralized.
Suggestions on how to deal with the terrible sulfuric acid fumes would be appreciated.
I am aware of the hazard and concerns of dealing with boiling concentrated sulfuric acid. My method has been to use a hot plate located out in a field, with me far away. This allows me to plug or unplug it into the power source while being a good distance away from the hazards. Everything can also be contained in a large dog cage or similar item for added protection.
I tried this recently with some very promising results. So nice to see the gold wires still intact after dissolving the encapsulating epoxy. I would like to find a good way to deal with the fumes coming off of boiling concentrated sulfuric acid.
My first thought is to do this under an inverted large glass bowl of sorts. Have it resting in a container filled with sand, and have the sand saturated with a solution of sodium hydroxide. Then as the fumes build up pressure and escape through the sand and are forcing their way through the sodium hydroxide solution, the sulfuric acid should be neutralized.
Suggestions on how to deal with the terrible sulfuric acid fumes would be appreciated.
I am aware of the hazard and concerns of dealing with boiling concentrated sulfuric acid. My method has been to use a hot plate located out in a field, with me far away. This allows me to plug or unplug it into the power source while being a good distance away from the hazards. Everything can also be contained in a large dog cage or similar item for added protection.