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Glas-col sizes?
Some of the 500 ml mantles are flat and flexible enough to be able to wrap around a 250 but also fla ... |
3-10-2018 at 17:16
by: Dr.Bob |
Science equipment looking for a home
Here is a newer spreadsheet, not too many changes, but a few.
Got a few 250 and 500 ml filter ... |
1-10-2018 at 18:14
by: Dr.Bob |
Fractionating colums and application...
I think the spiral is not actually attached to the column, thus just a simple column with a spiral t ... |
27-9-2018 at 12:33
by: Dr.Bob |
NMP - Purification - Ideas?
[rquote=538630&tid=13465&author=MrG]I want to remove NMP from GBL. Could I do this by freezi ... |
27-9-2018 at 12:22
by: Dr.Bob |
NMP - Purification - Ideas?
Its really hard to purify NMP and get it dry. If you can find any source of the pure material, it ... |
26-9-2018 at 07:08
by: Dr.Bob |
Science inspired travel
Can't go wrong in Florence, the smallest and worst museums and churches there have art that is still ... |
26-9-2018 at 07:03
by: Dr.Bob |
Hydrogen
Transfer hydrogenation used sodium formate quite often, which reacts with Pd/C to generate H2 and CO ... |
24-9-2018 at 07:27
by: Dr.Bob |
How to deal with oil mist on vacuum pumps?
They make mist catching filters that go on the exhaust. They slow down the roughing, but don't real ... |
20-9-2018 at 17:48
by: Dr.Bob |
Best locking mechanism for glass Flash Chromatography? Keck clips don't work.
I've rarely had a keck clip pop off, so I agree that you may be using too high a pressure. I always ... |
20-9-2018 at 17:45
by: Dr.Bob |
Expensive bottle cap's and their resistant liners
If anyone is looking for smaller bottles, I found two more cases of 60 ml Boston rounds from Qorpak, ... |
19-9-2018 at 17:06
by: Dr.Bob |
Flame heating (larger) RBFs?
And remember, the thicker the flask, the less evenly it will heat and expand, so thin glass is bette ... |
19-9-2018 at 06:18
by: Dr.Bob |
Ethyl bromide synthesis not working
Using truly anhydrous ethanol will improve the yield as well. If you have 3-4 equivalents of etha ... |
17-9-2018 at 15:44
by: Dr.Bob |
Expensive bottle cap's and their resistant liners
There are already PTFE cap liners for sale by some company, I have seen bags of them over time. Mi ... |
15-9-2018 at 11:05
by: Dr.Bob |
Preparation of magnesium silicate and/or activated alumina (and others) for chromatograpy
The cost comes down to what quality you want. Flash silica gel is made to tight (and very fine) pa ... |
14-9-2018 at 11:22
by: Dr.Bob |
Wondering where to buy such Breakseal ampule
I have some 1 ml weaton ampules for flame sealing. I can sell small numbers of them, they are che ... |
11-9-2018 at 09:36
by: Dr.Bob |
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
It is very hard to find cheap PTFE lined caps by themselves. Often, the cost from Qorpak for the c ... |
10-9-2018 at 08:45
by: Dr.Bob |
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
I have seen occasional low prices on Amazon and Ebay, often when they are changing products out, mov ... |
9-9-2018 at 16:50
by: Dr.Bob |
Please recommend some decent hotplates
Just found a box with a couple of working PC-320 Corning stirring hotplates while looking for some o ... |
9-9-2018 at 16:40
by: Dr.Bob |
Please recommend some decent hotplates
[rquote=534083&tid=90184&author=Keftedes89]I have seen may hotplates stirrers out there as I ... |
8-9-2018 at 17:09
by: Dr.Bob |
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
I do occasionally find used bottle worth cleaning and reusing, but getting harder, as most vendors n ... |
8-9-2018 at 05:51
by: Dr.Bob |
Reduction tube, vented boiling tube
If you want to heat it with a flame or to ridiculous temperatures, quartz is the way to go, the pres ... |
8-9-2018 at 05:35
by: Dr.Bob |
Reduction tube, vented boiling tube
I have many Ace and Chemglass heavy walled tubes for high pressure reactions, from 10 ml to 250 ml. ... |
7-9-2018 at 11:17
by: Dr.Bob |
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
I have lots of 60 and 120 ml bottles (in several types, caps, shapes, etc, for $1-3 each, most with ... |
7-9-2018 at 10:11
by: Dr.Bob |
Filter flasks and Buchner
I find 125 ml filter flasks to be ideal for small Buchners, like 55 mm and 70 mm.
The 250 ml filt ... |
3-9-2018 at 17:54
by: Dr.Bob |
Conversion of Acetone to a Gasoline Alternative
The challenge is that very few chemicals are cheaper per gallon than gasoline, due to the scale of i ... |
28-8-2018 at 18:33
by: Dr.Bob |
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