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Replacing ice blocks with brine bottles?
Thanks, Sulaiman. I forgot that melting ice takes up so much heat.

Yes some kind of reusable clos ...
1-1-2019 at 11:00
by: nimgoldman
Replacing ice blocks with brine bottles?
I usually fill about a dozen tupperware boxes with water and let them freeze to provide a coolant fo ...
29-12-2018 at 04:40
by: nimgoldman
Silver nitrate giving off HCl ??
I've made silver nitrate the common way (dissolving silver metal in conc. nitric acid).

Once most ...
10-12-2018 at 10:20
by: nimgoldman
Recovering Silver from Silver Bromide
Okay after several test tube experiments, I found that AgBr dissolves in nitric acid!

I thought i ...
7-12-2018 at 03:24
by: nimgoldman
Ammonia Generation
To improve gas absorbtion, you want the inlet tube to go to the bottom of the solution. Note that am ...
4-12-2018 at 17:28
by: nimgoldman
Using reflux condenser in a distillation column?
I am researching alcohol stills so that I can translate any of the design features into a glassware ...
2-12-2018 at 08:07
by: nimgoldman
Storing HNO3 (corrosion)
[rquote=553531&tid=103896&author=Sulaiman]I think that threads should not be wrapped in ptfe ...
20-11-2018 at 14:17
by: nimgoldman
My 2 neck flask is broken :(
I feel for you.

I have melted one 3-neck flask when drying molecular sieves under vacuum using a ...
18-11-2018 at 11:55
by: nimgoldman
Very low yield of nitroethane
[rquote=553734&tid=104971&author=morganbw]Why do you feel that ethyl nitrite would not be pr ...
18-11-2018 at 11:52
by: nimgoldman
Very low yield of nitroethane
[rquote=553580&tid=104971&author=S.C. Wack]IMHO the ideal solvent would be ethyl iodide. The ...
16-11-2018 at 18:33
by: nimgoldman
Very low yield of nitroethane
I found my ethanol is only 98%, it still should have drying capability but I am not sure if the litt ...
16-11-2018 at 15:56
by: nimgoldman
Very low yield of nitroethane
[rquote=553506&tid=104971&author=Tsjerk]Start by running it for a couple of days. I don't se ...
16-11-2018 at 12:14
by: nimgoldman
Storing HNO3 (corrosion)
I am now curious how worse the anhydrous stuff would be.

I produce the nitric acid from 98% sulfu ...
16-11-2018 at 12:10
by: nimgoldman
Very low yield of nitroethane
I have recently ran the Victor Meyer reaction with bromoethane and silver nitrite in ether.

I hav ...
16-11-2018 at 10:55
by: nimgoldman
Storing HNO3 (corrosion)
Just my two cents... This shows leakage of NO[sub]2[/sub] over one day - this is 68% (conc.) nitric ...
16-11-2018 at 08:28
by: nimgoldman
Production of Ammonia (Solution)
I tried the Cody's method, first mixing reagents into a slurry, then distilling it.

The distillat ...
15-11-2018 at 11:22
by: nimgoldman
Recovering Silver from Silver Bromide
[rquote=552698&tid=102555&author=phlogiston]So, you now rediscovered yourself what I posted ...
14-11-2018 at 07:21
by: nimgoldman
Recovering Silver from Silver Bromide
After little more research over some precious metal recovery groups, there seems to be an easy way t ...
13-11-2018 at 20:24
by: nimgoldman
Recovering Silver from Silver Bromide
Now I tried the "metal" route.

Sample of silver bromide added to the beaker:

[img]https://i.im ...
13-11-2018 at 18:45
by: nimgoldman
In praise of Deschem
Yeah I always feel like rescuing flyes from spider cocoons when unpacking the items.

The packagin ...
13-11-2018 at 11:14
by: nimgoldman
Recovering Silver from Silver Bromide
Experiment is king. So here is a residue of AgBr on filter - it already darkened from exposure:

[ ...
12-11-2018 at 17:52
by: nimgoldman
Recovering Silver from Silver Bromide
I found a brief description of the [url=https://www.slideshare.net/guest8e6599/silver-extraction-fro ...
12-11-2018 at 17:22
by: nimgoldman
Production of Ammonia (Solution)
I see. As for the wash bottle, I inverted it shortly after taking the photo, realizing it does not p ...
12-11-2018 at 15:30
by: nimgoldman
Storing HNO3 (corrosion)
Ideally, nitric acid should be stored separately or at least with other mineral acids, since it is s ...
12-11-2018 at 15:10
by: nimgoldman
Production of Ammonia (Solution)
It seems the easiest way to obtain pure ammonia solution is to produce ammonia gas and dissolve it i ...
12-11-2018 at 11:55
by: nimgoldman
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