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Anonymous
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Holy useless thread revival Batman,Photobacterium said:
This has got to be a record ,for reviving a thread for no reason.Almost 2 years to the day.
DANGER Do NOT Mix Sulfuric acid & Glycerin 4 gold Recov
- Thread starter Andrew W
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This has got to be a record ,for reviving a thread for no reason.Almost 2 years to the day.
Glycerin added to an sulphuric cell is not needed.
The basic idea when you add it is to "suck" water from your acid(this way lowering the chances that will dissolve cooper)....and not from environment....
If you work with 95% H2SO4 and have a lot of material to strip...(meanning a couple of hours of job before the cell is saturated)....YOU DON'T NEED GLYCERIN.
Hope this helps.
The basic idea when you add it is to "suck" water from your acid(this way lowering the chances that will dissolve cooper)....and not from environment....
If you work with 95% H2SO4 and have a lot of material to strip...(meanning a couple of hours of job before the cell is saturated)....YOU DON'T NEED GLYCERIN.
Hope this helps.
Photobacterium
Well-known member
- Joined
- Jul 7, 2011
- Messages
- 113
johnny309 said:
Thanks for the explananation.
C3H8O3 - glycerin
H2O
H2SO4
is there a chemical formula for the process/ reaction ?
Ideally......it isn't
The stating chemichals for your reaction is not "pure".....or to say laboratory procentace
IN THIS"SOUP" you will add matterial of unknowing composition,your cathode(lead) is full of oxides....and so on.......
In chemestry the key factors also include the enviroment(temperature,humidity,surrounding metals,etc)......
It"s a hobby for most of us.....just keep it SAFE.......read ,read and read.......and do a "search" when you have questions...
The stating chemichals for your reaction is not "pure".....or to say laboratory procentace
IN THIS"SOUP" you will add matterial of unknowing composition,your cathode(lead) is full of oxides....and so on.......
In chemestry the key factors also include the enviroment(temperature,humidity,surrounding metals,etc)......
It"s a hobby for most of us.....just keep it SAFE.......read ,read and read.......and do a "search" when you have questions...
So, I looked through this entire topic and I am still slightly confused. I would like to have one question answered(sorry if someone did and I missed it)
What happens if, by random chance, mistake, employee error, or whatever else Nitric acid is mixed with Sulfuric and Glycerin?
I know you shouldnt mix them and always cap your chemicals, but this is a WHAT IF
I look forward to reading about this. Thanks guys
Comrade
What happens if, by random chance, mistake, employee error, or whatever else Nitric acid is mixed with Sulfuric and Glycerin?
I know you shouldnt mix them and always cap your chemicals, but this is a WHAT IF
I look forward to reading about this. Thanks guys
Comrade
Geo
Well-known member
you just listed the ingredients of nitroglycerin. unless this is your intention, keep glycerin out of your refining.
Geo
Well-known member
from wiki,
The industrial manufacturing process often uses a nearly 1:1 mixture of concentrated sulfuric acid and concentrated nitric acid. This can be produced by mixing white fuming nitric acid—a quite expensive pure nitric acid in which the oxides of nitrogen have been removed, as opposed to red fuming nitric acid, which contains nitrogen oxides—and concentrated sulfuric acid. More often, this mixture is attained by the cheaper method of mixing fuming sulfuric acid, also known as oleum—sulfuric acid containing excess sulfur trioxide—and azeotropic nitric acid (consisting of about 70 percent nitric acid, with the rest being water).
The sulfuric acid produces protonated nitric acid species, which are attacked by glycerin's nucleophilic oxygen atoms. The nitro group is thus added as an ester C-O-NO2 and water is produced. This is different from an aromatic nitration reaction in which nitronium ions are the active species in an electrophilic attack on the molecule's ring system.
The addition of glycerin results in an exothermic reaction (i.e., heat is produced), as usual for mixed-acid nitrations. However, if the mixture becomes too hot, it results in "runaway", a state of accelerated nitration accompanied by the destructive oxidizing of organic materials of nitric acid and the release of very poisonous brown nitrogen dioxide gas at high risk of an explosion. Thus, the glycerin mixture is added slowly to the reaction vessel containing the mixed acid (not acid to glycerin). The nitrator is cooled with cold water or some other coolant mixture and maintained throughout the glycerin addition at about 22 °C (72 °F), much below which the esterification occurs too slowly to be useful. The nitrator vessel, often constructed of iron or lead and generally stirred with compressed air, has an emergency trap door at its base, which hangs over a large pool of very cold water and into which the whole reaction mixture (called the charge) can be dumped to prevent an explosion, a process referred to as drowning. If the temperature of the charge exceeds about 30 °C (86 °F) (actual value varying by country) or brown fumes are seen in the nitrator's vent, then it is immediately drowned.
i understand that you can hear alot of things from alot of people but you never know the answer unless you ask the question.
The industrial manufacturing process often uses a nearly 1:1 mixture of concentrated sulfuric acid and concentrated nitric acid. This can be produced by mixing white fuming nitric acid—a quite expensive pure nitric acid in which the oxides of nitrogen have been removed, as opposed to red fuming nitric acid, which contains nitrogen oxides—and concentrated sulfuric acid. More often, this mixture is attained by the cheaper method of mixing fuming sulfuric acid, also known as oleum—sulfuric acid containing excess sulfur trioxide—and azeotropic nitric acid (consisting of about 70 percent nitric acid, with the rest being water).
The sulfuric acid produces protonated nitric acid species, which are attacked by glycerin's nucleophilic oxygen atoms. The nitro group is thus added as an ester C-O-NO2 and water is produced. This is different from an aromatic nitration reaction in which nitronium ions are the active species in an electrophilic attack on the molecule's ring system.
The addition of glycerin results in an exothermic reaction (i.e., heat is produced), as usual for mixed-acid nitrations. However, if the mixture becomes too hot, it results in "runaway", a state of accelerated nitration accompanied by the destructive oxidizing of organic materials of nitric acid and the release of very poisonous brown nitrogen dioxide gas at high risk of an explosion. Thus, the glycerin mixture is added slowly to the reaction vessel containing the mixed acid (not acid to glycerin). The nitrator is cooled with cold water or some other coolant mixture and maintained throughout the glycerin addition at about 22 °C (72 °F), much below which the esterification occurs too slowly to be useful. The nitrator vessel, often constructed of iron or lead and generally stirred with compressed air, has an emergency trap door at its base, which hangs over a large pool of very cold water and into which the whole reaction mixture (called the charge) can be dumped to prevent an explosion, a process referred to as drowning. If the temperature of the charge exceeds about 30 °C (86 °F) (actual value varying by country) or brown fumes are seen in the nitrator's vent, then it is immediately drowned.
i understand that you can hear alot of things from alot of people but you never know the answer unless you ask the question.
