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Effectiveness of hexane as a solvent for benzaldehyde.
I need to use a different solvent for extracting benzaldehyde from an inorganic oxidizer in H2SO4. ... |
21-1-2007 at 18:09
by: Hilski |
cheap vacuum pump that can get down to 17 torr
[quote]IMHO, for most applications in chemistry, the hydroaspirator is still the best vacuum source. ... |
20-1-2007 at 15:28
by: Hilski |
Method to "calibrate" a dimmer for heating mantles?
[quote] The dial can be calibrated in percent power using the voltage/RMS relationship and the low e ... |
19-1-2007 at 10:54
by: Hilski |
Question about cold traps
[quote]I think most pumps will do better than 28-29 in Hg, not putting your pump down. Maybe you sho ... |
19-1-2007 at 10:18
by: Hilski |
Method to "calibrate" a dimmer for heating mantles?
[quote]I'm having a little trouble seeing the need to "calibrate" any kind of a voltage regulator fo ... |
18-1-2007 at 20:50
by: Hilski |
Method to "calibrate" a dimmer for heating mantles?
I recently picked up a couple different sizes and brand names of heating mantles. They didn't come ... |
18-1-2007 at 09:10
by: Hilski |
Morgellons sindrome
I assure you this is a real disease (infection/fungus/allergy/autoimmune disorder) or whatever. O ... |
17-1-2007 at 18:14
by: Hilski |
Amalgamation with mercuric iodide
Has anyone ever used HgI2 for amalgamating aluminum? I'm trying to find out how well this compound ... |
10-1-2007 at 20:33
by: Hilski |
Question about cold traps
[quote]You might as well use a water aspirator which can go as low as 15-20 torr.[/quote]
If I had ... |
9-1-2007 at 14:19
by: Hilski |
Stuborn MnO2
[quote] I added slowly one ml of 30% hydrogen peroxide I and saw a bit of a yellow foam forming. Aft ... |
9-1-2007 at 08:58
by: Hilski |
Question about cold traps
[quote]Cold traps are used only for rotary oil pumps when you want to achieve a vacuum of 10e-2 torr ... |
9-1-2007 at 08:02
by: Hilski |
Question about cold traps
I have a Gast lab vacuum pump, which has carbon fiber vanes, and uses a separate siphon type oiler, ... |
8-1-2007 at 23:38
by: Hilski |
Hotplate/Stirrer
[quote]I recall Nicodem using some functional but dangerous looking string of power resistors as an ... |
6-1-2007 at 08:39
by: Hilski |
Hotplate/Stirrer
[quote]i already have a hotplate that works amazing, is there any way to fuck with it to make it int ... |
4-1-2007 at 18:24
by: Hilski |
Amino alcohol via Akabori, trial run
[quote]poured this into a excess of l-alanine in silica gel[/quote]
Just out of curiosity, why are ... |
3-1-2007 at 10:55
by: Hilski |
Amino alcohol via Akabori, trial run
The diastereoselectivity (is that even a word?) of this reaction is very appealing, as is the notion ... |
2-1-2007 at 17:36
by: Hilski |
Reductive amination of L-PAC
[quote]How to form stable imine in a suitable solution for zinc reduction? nh3 in alc. ?[/quote]
... |
29-12-2006 at 08:48
by: Hilski |
Reductive amination of L-PAC
[quote][i]Originally posted by Organikum[/i]
Acetone can be used but it requirers the use of much m ... |
22-12-2006 at 21:37
by: Hilski |
Scored a Gast vacuum pump today
I bought a Gast 0523 lab model vac pump off a co-worker today for a measly 50 bucks. The pump is vi ... |
22-12-2006 at 21:32
by: Hilski |
Acetone can be used as a hydrogen acceptor in liu of acetaldehyde
Acetone can be used as a hydrogen acceptor in lieu of acetaldehyde. Orgnikum spoke of this in anothe ... |
16-12-2006 at 08:32
by: Hilski |
Reductive amination of L-PAC
Assume one were to adapt procedure #1 from [url=http://designer-drugs.com/pte/12.162.180.114/dcd/che ... |
15-12-2006 at 17:46
by: Hilski |
Reductive amination of L-PAC
[quote][i]Originally posted by Organikum[/i]
If you add the methylamine slowly in portions before r ... |
11-12-2006 at 15:32
by: Hilski |
Yeast extract
I've been playing around with yeast some lately, just trying to see what I can learn. I've been gro ... |
10-12-2006 at 20:12
by: Hilski |
Capillary tube for vacuum distillations
[quote][i]Originally posted by garage chemist[/i]
Benzaldehyde can be distilled at atmospheric pres ... |
4-12-2006 at 19:06
by: Hilski |
Capillary tube for vacuum distillations
[quote]In my laboratory I've never seen anyone use inert gas for vacuum distillations (well, we use ... |
4-12-2006 at 08:27
by: Hilski |
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