The fumes of Gold Refining through HCL and H2SO4?

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xuanphuocmap

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Jul 18, 2013
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Hey guys can you guys tell me what does the fumes of gold Refining through HCL and H2SO4 contain? (No HNO3)
Thank you guys a lot and sorry for my English :D
 
You can also get hydrogen gas depending on the metal the acids are dissolving.
Sulfur dioxide is also possible with H2SO4 and metals, some metals can be so reactive they can also be carried off in the mist evolved.
If other chemicals like chemicals involved in electronic components, you can also have other toxic substances evolved as gas from the reaction.
If these acids are mixed with other chemicals as we do when we recover or refine metals, they can form several other gases depending on chemical or oxidizer used, all of which can either be toxic, corrosive, and as in the case of hydrogen even flammable, and non of which would be good to breath.

Poisonous gases can be created when sulfuric acid is mixed with either sodium hypochlorite (bleach) or sodium bisulfite. Mixing sulfuric acid and sodium hypochlorite together can produce hydrogen chloride gas. Hydrogen chloride gas is a strong oxidizer that is corrosive to all living tissue and can be fatal if inhaled. Combining sulfuric acid with sodium bisulfite can create sulfur dioxide gas. Sulfur dioxide gas is colorless and has an irritating, suffocating sulfurous odor. A third type of dangerous reaction produces hydrogen cyanide from the mixing of sodium cyanide and sulfuric acid. Hydrogen cyanide is highly toxic and can result in immediate death due to brief exposure. Hydrochloric acid, or sulfuric acid in contact with common metals (higher than hydrogen in the reactivity series of metals, reacts to produce flammable and potentially explosive hydrogen gas.

A resultant of hydrochloric acid and sulfuric acid mixing is chlorine gas. This is due to the fact that sulfuric acid has an affinity for water.

Bleach or sodium hypochlorite and hydrochloric acid mixing forms chlorine gas like they used in first world war(a poisonous gas). If sodium bisulfite and hydrochloric acid are mixed, sulfur dioxide (a poisonous gas) is produced.

It would be hard to say without a more detailed description of how you are using these acids what all the gases which could form, but I can easily say you do not want to be breathing them.

Mixing acids with ore you can have a wide variety of poisonous gases arsenic, Hydrogen sulfide...


http://www.cdc.gov/niosh/docs/81-123/pdfs/0577.pdf
http://www.chemicalbook.com/ChemicalProductProperty_EN_CB7421538.htm
 
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