Search results for query: hood

...process and result in higher purity. The funnel draws up into a fume scrubber and effectively exhausts the NOx. This setup was done without a hood because when the reaction stopped they let it cool and never handled hot acid. You will be decanting and rinsing and it will leak fumes. It...

...poly and which won't and what I can use as a degergent or other wetting agent. Planing to use the counterflow design, especially for a small hood. To reduce the air flow into the hood I was thinking about a segmented plastic window in strips magnetically secured to the front of the hood...

...of hydrochloric acid (muriatic acid) and a couple of drops of house hold bleach. Give it 5 minutes and then test with stannous chloride, if there's gold you'll know pretty quick. Do it outside or in a fume hood...hydrochloric acid fumes are pretty pervasive and will rust anything with in 50...

Hello Everyone, Hope everyone is doing well. I’ve been lurking in silence for a while. I wanted to do some quick samples at the mill site. Did some research and came across this post from a while back. I want to try this but I’m slightly confused. When someone says iodine or potassium iodine I...

CaO will not go anywhere, it is one of the most refractory oxides used to day, CdO on the other hand may go into the Cupel.

Sulfamic acid needs to be used hot at around 80 Centigrade. Nice powder.

i used to think that all legit gold had stamps, but apparently older stuff did not have any markings or stamps... I do have HCL, and 3% peroxide... do you think that would work? And if so are there any dangers mixing the two? i have no fume hood yet...

Can you use a direct flow to outside with filters on a fume hood. The design you showed me did not have filters. At my home I would need to filter the gases.

I found it! This is a test that can give you an indication of purity but it is not quantitative. In the fume hood, dissolve a 1 gram sample of the silver shot in distilled water and reagent Nitric acid. (2:1) on a hot plate. There should be no color to this solution, if there is, it is...

There are cheap ways to build a fume hood - there is lots of info here on the forum about building fume hoods Kurt

What size are you talking about? Gas or electric heating?

Thank you very much! It's starting to become clearer. I don't know if I've read a lot, but I'll look into it.

Welcome to us. Interesting approach, but besides your concern I also think the longevity (or lack there of) and price will make it impractical. Better to use a bottle train and vacuum suction for these small volumes. Something like this:

...If you read the thread properly I think there are scrubbers in there. Example 1 https://goldrefiningforum.com/threads/building-a-chemical-fume-hood-with-a-plain-steel-blower.23107/post-242558 Example 2...

Ok thank you for the information. I buy cases of mason jars so they’re brand new and I have never had any break yet and I keep a Pyrex dish under just in case it does break

...to drop any Lead. By now you will see that you have quite an investment in time, chemicals, lab ware, torches, molds, Etc. Not to mention a fume hood. I understand the interest in what you are doing, but unless you want to continue this, you should invest in the proper stuff. As Kurtak said...

...with a "closed system" scrubber. Note, that doesn't mean a sealed system that builds up pressure, but a "reactor" like an erlenmeyer or boiling flask attached to a series of scrubber bottles that will scrub most of the fumes before the hood evacuates the much smaller amount that escapes. Dave

...(certainly economical) then, once the gold has all been electrowinned to the steel wool, the well rinsed cathode can be either (in an exhaust hood) treated with Hydrochloric Acid to leach away a good amount of the iron leaving just electrowinned gold and possibly silver as well. Then the...

...or Pd is in there, but it looks ready for AR to me. But if this is your first attempt; How much do you know about safety and working in a fume hood to keep the gases away from you? The AP went well as I can see. So you have shown you have some skills. Try a couple of grams of the powder...

...be dissolved in a bath of liquid and later neutralized? or passed through a cooler to condense them? or anything? I will be building a fume hood before I start any of the Acid stuff, and will be doing it outside next spring, but if there is a way to stop those gasses from going into the...

...suggest to you before you should proceed. So put things on hold for now and let us review please. Can you tell us about your workspace? fume hood, lab glass, PPE, etc. You will receive links to mandatory literature ;) @Yggdrasil Did you go after visible gold from e-waste parts only or...

Bringing silver chloride (AgCl not AgCl3 or AgCl2, bty) to constant weight by drying in a dessicator oven for analysis of chloride was the first experiment I did in my sophmore class of Analytical Chemistry that was required of BS chemistry majors. The XRF does not measure below the surface for...

I'm a bit confused to what your proposition is and why it is made. There is nothing to gain by adding bleach to HCl/H2O2 other than pushing up the pH. Better add pool chlorine tablets, if you need more CL- in the solution. Peroxide is strong enough by itself, much stronger oxidizer than...

I do have a fume hood ! , but still , you have to open the door to add and remove stuff ! We learn !

The client who has this does not have a lot of hood space so a lot happens out of the hood. This funnel has about an 1 1/2” spout and where it comes out of the funnel he has glued on a PVC tee which connects to a good exhaust. I am not sure if his mixer has any blades that would direct the...

...the risks to an acceptable level as effective as you can. Don't overdo it. And if you want to introduce a new safety measure, like a splash hood with a fresh air supply line, take in account which new risks it causes and if these are bigger that the danger you're trying to avoid. To be...

I believe it was this one:

Hi folks, newbie here from Scotland, I work in a science park so was lucky enough to get a small fume hood for free, it has prefilters and two heavy main filters which slide in to the fume hood, it also has two spare filters which I believe to be hepa filters, the other two are activated carbon...

...which the metal duct I consider to be a consumable I get a year or 2 out of it. Unfortunately I had to come out of the back of the fume hood but resolved the issue by using the cabinet shelf on a angle For the lighting I used 12v LED ribbon lights placed inside clear PVC tubing and sealed...