Doug's Lab - 2015-12-24
In this video I prepare a copper chromite catalyst from ammonium dichromate, ammonia, and copper sulfate. I will use this catalyst in part 2 to make pyridine from niacin. Patreon Info: https://www.patreon.com/DougsLab
3:07 this is how you make portal gel.
hmmmmmm
Thanks, nice explanation throughout the video, keep doing what you're doing.
Beautiful lab setup you have! Pretty amazed by the ingenuity of the ghetto drying of the paste!
Great video! Keep up the good work!!
Excellent ! I've been trying to find a good video on this catalyst for a while
Nice, you had me thinking the wifi was out or something...
Hi Doug. And thank you for the great help you give us all.Could you please comment on the significance/importance of cleaning/removing the Copper Oxide from the Copper Chromite,before proceeding to use it in the Niacin to Pyridine process?
Thank you.
Love the quality of your videos and how well you cover lab work along side with the science of chemistry. Just came a $5 patreon so keep up the great work.
Thank you so much
Tree Fiddy?
Thanks for taking the time to film and talk through that water bath and pie plate technique. Simple, "boring," but incredibly useful things like that have a way of getting skipped over sometimes.
The quality to views ratio of this video offends me.
the views to likes ratio also not so good
Who cares?
@memberwhen We care because his channel deserves more viewers and likes, which would give Doug an incentive to make more videos.
6:34 use rather coffee filters
how can i make cu+tio2 catalyst
1:39 Does anyone know if those two (NH4) come from the ammonia hydroxide or from the ammonium dichromate? (Trying to see if you can do this same reaction with potassium dichromate or sodium dichromate as well)
Holy shit dude I'd never even thought of buying an IR thermometer.
Use chromic acid and cuco3.cu(oh)2
tbh you have some cool videos
i got 1 question, what is the function of the process where u burn the catalyst inside a crucible ceramic at 400 dgree?
Great chemistry! How about a video on K4Fe(CN)6 +3H2SO4 = 6HCN +FeSO4 + 2K2SO4 then distil HCN into ice cold ethanol with NaOH to give 6NaCN and 6H2O. You will get nearly 90% NaCN in crop 1 and evaporate ethanol to get 10%NaCN crop 2..how about it,Doug?!
As simple as that
Please write quantities of materials accurately
I made some. How do you clean the frit of the copper chromite? HCL worked on the precipitate real well but what to use on the copper chromite from the last filter step?
Thumbs up for science words!
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To stir twice as fast, use two stirbars
Charles Stephano If you want 10 times the speed,use 10 stir bars abd buy 10 beakers.
good
It seems impossible to get ammonium dichromate or chromium trioxide in EU due to REACH regulation :((
orange and blue were my Cholla high school colors
You mentioned that you used ammonium dichromate, but can this be carried out with potassium dichromate as an alternative?
i know this is a older video but i have a question: could potassium dichromate be used instead of sodium dichromate?
he used ammonium dichromate, you have to use that
Does anyone know the name of the piece of glassware in vacuum filtration that you put the liquid mixture in?
Glass fritted filter
Buchner funnel
Ammonium chromate looks a lot like urine. Probably smells like it because of the ammonia. Think I can cheat a pee test with it?
Copper (II) oxide or basic copper carbonate are nearly as effective as decarboxylation catalysts for niacin but then you wouldn't have the fun of making copper chromite I suppose.
Oxidation is not a significant issue in this case.
Did you ever get around to comparing the yields between copper carbonate and copper chromite John Black Super Chemist?
yields are 40/54 with carbonate, 80/90 with chromate
What is the liters size of the vacuum flask that you use for the vacuum filtration?
Looks like 1 Liter.
The colors are so pretty at 2:58
Pretty and deadly as hell.
Couldn't you 'just' slit the ring so the thermal expansion difference won't crack the crucible?
Anyone noticing that the starting materials are like the blue and orange portals in the game Portal?
At 13:11 was that dust some of the catalyst? If so how come it was doing that? Was the stirring causing a slight 'gust' upwards to evacuate some of the fine powder?
+Samdroxpie Possibly the pouring of the powder will have displaced air in the beaker causing a small updraft
Ah right, makes sense - Thanks
Are the equations at 0:05 right? Maybe it's a class of compounds unknown to me, but shouldn't the copper ammonium chromate be written as Cu(NH4)2(CrO4)2? Cuz you wrote it Cu(NH2)(CrO4)2. Isn't the NH2 group an amide group? Amides have a negative charge. If I'm wrong please explain me. Also I'm quite sure that ammonium chromate is (NH4)2(CrO4), not (NH4)(CrO4).
Pietro Tettamanti He is that hated type of person who doesnt reply to comments, it seems
damn that's an old Bunsen Burner, you must have found that at some sort of yard sale or something lol
Anthony Kernich He said it was homemade
that's awesome! Probably cost 1/10 of the price too.
@Anthony Kernich Yep, it's really easy and cheap to make burners like that. Just buy some steel pipe fittings and screw them together in the right ways and all different kinds of burners can be made. It's quite fun, you should try it!
One issue with ammonium dichromate is its toxicity and it is next to impossible to obtain as an individual in EU. Are there any alternative catalists that are better-yielding than basic copper carbonate?
"next to impossible" you say? 50 grams of chromium trioxide are dissolved in small amount of water. The obtained solution is treated with 33 ml of the concentrated (d=0.9 g/ml) solution of ammonium hydroxide. Then the solution is concentrated by evaporation and obtained crystals of ammonium dichromate are filtered and dried in a desiccator over concentrated sulfuric acid. The yield of ammonium dichromate is 70%.
But yes if you live in Germany or Austria (and a few others iirc) they won't ship chromates to you, many other EU countries are fine as long as you remain under a stated treshold in amount. I suspect CrO3 will fall under the same regulation. But don't be so quick to give up, if dichromates are unavailable for you, make them yourself. The beauty of hobby chemistry. There's always a way around, sure it takes extra work, but as a hobby chemist this should be a welcome challenge. Especially since we're talking inorganic chemistry here.
Coppersalts down the sink!? WTF?
It wasn't even diluted...
Copper salts are used constantly in solution in agriculture and home gardening where they are sprayed directly into the environment..... Doug did nothing wrong here. You're overreacting like halogen meeting an alkali metal for the first time.
At least in the US, copper sulphate is sold specifically to be flushed down drains in ~1 lb quantities. Used to kill tree roots which clog sewer lines.
oh boo hoo. so is poop.
Copper acetate is quite benign reall6
Hey Doug, im 13 years old and currently have my own lab that i use often and have been wanting to make videos documenting my experience. do you have any tips?
+Bunsen Burns wow thanks for the fast reply, I don't have a hot plate but I do have a wickless heater. Would that work?
I would recommend heating on the stove then. In that case you don't even need a beaker and in fact I would recommend using a pan. This is just straight kitchen chemistry, after all. You can store the sodium carbonate for later use.
Just be careful not to heat to melting. You could also place it in the oven but that defeats the purpose of seeing the CO2 bubble out of the solid.
he should also add some benzoylmethylecgonine if he's going to be doing this on the stove
+Albert Escamilla you are a jackass, sir...
Copper 'AMMONIUM' chromate? You just butchered all chemical nomenclature right there
Blackdown - 2015-12-24
Awesome new video, Doug! Keep it up :-)