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Synthesis of Hexane from Cellulose/Glucose
I worked in biofuels for a short time. This (conversion of cellulose to anything useful) type of w ...
22-5-2018 at 17:59
by: Dr.Bob
3-acetylindole
Might be better to protect the indole NH with a alkylprotecting group, like benzyl. But even with a ...
15-5-2018 at 03:37
by: Dr.Bob
Is this kit any good?
For the price, it is hard to go wrong, as I sell used 24/40 kits for more than that. The Chinese go ...
14-5-2018 at 11:22
by: Dr.Bob
Oxalyl Chloride Challenge
Did you simply chlorinate the solvent TCE to add Cl across the double bond? Not sure how easy that ...
14-5-2018 at 11:14
by: Dr.Bob
What's the most expensive substance you've bought?
Had to use a gold catalyst (AuCl3) once, back in grad school, when gold was a bit cheaper, but still ...
8-5-2018 at 12:58
by: Dr.Bob
How should I choose glass joint size?
small, cond is 34/45
med, cond is 45/50
large, cond is 55/50
7-5-2018 at 16:24
by: Dr.Bob
How should I choose glass joint size?
[rquote=516964&tid=81955&author=fusso]So I think I also need a soxhlet extractor for extract ...
7-5-2018 at 10:37
by: Dr.Bob
Buchner funnel: glass or ceramic?
[rquote=517029&tid=82545&author=Sulaiman]I use 90mm filter papers and a porcelain Buchner fu ...
7-5-2018 at 10:26
by: Dr.Bob
Do this kind of pumps exist?
There are simple syringe pumps that can push and pull, with the right valves, you can move small vol ...
3-5-2018 at 17:47
by: Dr.Bob
possible free ethanol sample
[rquote=516551&tid=82350&author=Hegi][rquote=516381&tid=82350&author=VSEPR_VOID]They ...
3-5-2018 at 11:47
by: Dr.Bob
The Sciencemadness TLC Apparatus Challenge
I am remembering when we used to make our own TLC spotters in the undergraduate research lab by heat ...
2-5-2018 at 09:10
by: Dr.Bob
ozonolysis alkene->aldehyde, used in industry?
I used to run ozonolysis reactions in industry all of the time. They liked them because the reagen ...
30-4-2018 at 17:17
by: Dr.Bob
possible free ethanol sample
They sell a mixture of ethanol and n-heptane (as the denaturing agent). They likely distill off tog ...
30-4-2018 at 12:59
by: Dr.Bob
Well time to start making SO3 and Bromine! (Ampoules)
Having tried to seal ampules before, I can say that sealing small ones is hard, 5-10 ml is harder, a ...
29-4-2018 at 17:56
by: Dr.Bob
Science equipment looking for a home
[rquote=516031&tid=15667&author=XeonTheMGPony]Can I get a list of available prescored ampule ...
29-4-2018 at 17:44
by: Dr.Bob
The Sciencemadness TLC Apparatus Challenge
I had programmed a liquid handler robot to spot TLCs years ago, and it worked pretty well until that ...
27-4-2018 at 07:56
by: Dr.Bob
Fatty amine from Soap?
Seems plausable, not necessarily easy. But the concept is all good. Making amide from urea may ...
25-4-2018 at 06:08
by: Dr.Bob
Making borosilice fritted glass for distillation
I have some various 24/40 m/f jointed tubes with a frit in the middle. Not perfect, but might work ...
23-4-2018 at 18:25
by: Dr.Bob
Grignard vs. organolithium
Organo lithiums do best when cooled for the deprotonation step, to avoid further reactions, like hom ...
23-4-2018 at 09:04
by: Dr.Bob
Anyone ever worked with concentrated 11M n-butyllithium solution? Is a cloudy suspension normal?
I have not used it that concentrated, but I have used higher than 1M and even it becomes cloudy over ...
18-4-2018 at 17:30
by: Dr.Bob
How should I choose glass joint size?
That makes sense. If you are looking for 24/40 parts, there are many people selling them on Amazon, ...
16-4-2018 at 09:23
by: Dr.Bob
How should I choose glass joint size?
US sizes are typically 14/20, 19/22, 24/40, and 29/42, which are ideal for scales of 10-250 ml, 50-5 ...
15-4-2018 at 19:13
by: Dr.Bob
Science equipment looking for a home
Also, I have recently found both a box of sep funnels (from 60 ml to 4 L size, many intact, some wit ...
11-4-2018 at 18:13
by: Dr.Bob
Science equipment looking for a home
Here is an udated list of my current hot/stir plates. The Corning ones below (PC models) all have a ...
10-4-2018 at 16:20
by: Dr.Bob
Mystery Glassware Identification Thread
[rquote=513392&tid=31602&author=RogueRose]
Maybe some kind of glass mortar & pestle. It ...
9-4-2018 at 07:40
by: Dr.Bob
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