Sciencemadness Discussion Board

How to remove the organic junk from store bought acid

symboom - 16-5-2018 at 11:25

Here are some acid that can be found
Phosphoric acid
Hydrochloric acid
Hydrofloric acid
Sulfuric acid

All have organic junk in them that gets in the way of some reactions

So how can they be purified by various methods
Hydrochloric acid
https://m.youtube.com/watch?v=jv1Ms6Subg4
https://m.youtube.com/watch?v=KJNdOe8veWY
https://m.youtube.com/watch?v=7u_oDyVTKJs

Sulfuric acid
https://m.youtube.com/watch?v=4DUGRWjdNLI
https://m.youtube.com/watch?v=8mSH-yFofA8

Nitric acid
https://m.youtube.com/watch?v=S6GpMQ98u8I

Phosphoric acid
https://m.youtube.com/watch?v=aZITxRTtWGY

Hydrofluoric acid
Concentrating by adding a desicant
Reminder for my self is saving those videos on mediafire
No one likes dead links

[Edited on 16-5-2018 by symboom]

WangleSpong5000 - 16-5-2018 at 20:30

Define 'organic junk' ...

dig around for MSDS sheets and learn about the different grades of chemicals that exist and the industry practices governing excatly what has to be declared in chemicals... you'd be surprised how lacking an MSDS sheet can be where Technical grade chemicals are involved.

VSEPR_VOID - 17-5-2018 at 02:02

You can also distill azotropic nitric acid under a strong vacuum to produce white fuming nitric acid of a concentration greater than the original azotrope but less than 100%.

https://www.youtube.com/watch?v=Z364tCW_aJc

Does anyone think plumbers tape will work for this application? I can not afford a 30 dollar bottle of vacuum grease.

CobaltChloride - 17-5-2018 at 02:09

I don't see why it wouldn't work. You could also use concentrated sulfuric acid to seal the joints as nilered did on multiple occasion, like when he made chromyl chloride.

XeonTheMGPony - 17-5-2018 at 04:07

Distill, distill and distill! Or simply heat long enough.

symboom - 17-5-2018 at 09:22

I know the normal way i like to see diferent ways then the typical because i bet theere are those here who cant distill and havnt bought the glassware not including me
[Edited on 17-5-2018 by symboom]

[Edited on 17-5-2018 by symboom]

Reboot - 17-5-2018 at 15:10

If the cost of a tube of 'lab' silicone grease is a bit much to take, I've seen small packets of silicone grease at the hardware store (in plumbing supplies) for $4-$5.

coppercone - 17-5-2018 at 17:54

Quote: Originally posted by VSEPR_VOID  
You can also distill azotropic nitric acid under a strong vacuum to produce white fuming nitric acid of a concentration greater than the original azotrope but less than 100%.

https://www.youtube.com/watch?v=Z364tCW_aJc

Does anyone think plumbers tape will work for this application? I can not afford a 30 dollar bottle of vacuum grease.



I don't know if I did something wrong but I found that distilling nitric acid, kech clips got destroyed even when I used dow corning vacuum grease. I would not trust teflon. I would use bend stainless wire to hold the glass together.

This was a vacuum distillation.

Also, im a bit ignorant here but what is the result of the reaction between the dye and the other contaminants of the sulfuric acid when it reacted with hydrogen peroxide? Do all the residues leave as a gas? (I don't imagine so)

I vacuum distilled my sulfuric acid, to keep the temperatures reasonable. I was unsure if organic compounds could have migrated with it. I found a very thin frosty residue in the flask when it was boiled dry. I thought that the purity would be higher then leaving whatever reactants get burned by the impromptu piranah fluid. I did react it with H2O2 first because I figured if there is anything that can migrate, its vapor pressure would be vastly increased after it was basically burned.

[Edited on 18-5-2018 by coppercone]

XeonTheMGPony - 18-5-2018 at 03:52

Quote: Originally posted by symboom  
I know the normal way i like to see diferent ways then the typical because i bet theere are those here who cant distill and havnt bought the glassware not including me
[Edited on 17-5-2018 by symboom]

[Edited on 17-5-2018 by symboom]


There simply are certain things you should NOT mess with till you have some basic glass wear!