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Slow high torque electric motors for stirrer?
I finally have the large OrientalMotor stepper motor running using the Toshiba 60 driver. In the at ...
1-10-2018 at 17:47
by: Magpie
Avast HTML file conversion
I am trying these file converters but having no luck. There's always some hangup along the way in t ...
29-9-2018 at 18:25
by: Magpie
Avast HTML file conversion
I have an Avast HTML video file that I need to convert so that it can be posted in this forum. Can ...
29-9-2018 at 11:31
by: Magpie
Preparation of ethyl sulfate
My 18" TC arrived so I ran this synthesis again. The equipment set-up was perfect and I ran it exac ...
28-9-2018 at 14:41
by: Magpie
Preparation of Nitric Acid
You shouldn't have to heat it so much. The azeotrope comes over at 120°C. Did you add the require ...
26-9-2018 at 17:25
by: Magpie
How to deal with oil mist on vacuum pumps?
If there are no gases going through your pump you will have no oil mist. I don't get any mist excep ...
21-9-2018 at 09:12
by: Magpie
Vac Distillation of Water keeps stalling? Too high vacuum?
[rquote=537020&tid=93298&author=beerwiz]
Could the vacuum pump be pulling too strong of a v ...
20-9-2018 at 18:27
by: Magpie
How to deal with oil mist on vacuum pumps?
Seal your system so no gases (includes air) are moving through the pump. Or at least minimize the g ...
20-9-2018 at 18:20
by: Magpie
Demethylation of Vanillin and Eugenol
[rquote=536834&tid=92847&author=clearly_not_atara]
For vanillin, HBr is known to work. [/rq ...
20-9-2018 at 09:10
by: Magpie
Demethylation of Vanillin and Eugenol
Might the OrgSyn preparation of catechol from guaiacol be useful here?

https://www.sciencemadness ...
19-9-2018 at 13:02
by: Magpie
Any ideas to passivate stainless steel against chlorine?
I once worked in a paper mill with stainless steel headbox and fourdrinier. Passivating was done wi ...
16-9-2018 at 09:37
by: Magpie
Building a peristaltic pump for small volumes/rates.
A week ago I had three peristaltic pumps that didn't work. Two of them were brand new. Today all 3 ...
15-9-2018 at 17:34
by: Magpie
Solubility of natural resin
This might work:

https://www.de-solv-it.com/
13-9-2018 at 08:23
by: Magpie
Preparation of Dimethyl Sulfate Discussion
I have seen 85% phosphoric acid sold at brewing supply stores. It is also available through Amazon, ...
11-9-2018 at 17:14
by: Magpie
Preparation of Dimethyl Sulfate Discussion
85% phosphoric acid is available through Duda Diesel.
11-9-2018 at 15:28
by: Magpie
Preparation of Diethyl Sulfate
My notes say "less than or equal to" 45mmHg. I think my inability to control the salt temperature u ...
9-9-2018 at 02:07
by: Magpie
Preparation of Diethyl Sulfate
Yes, if the use of the peristaltic pump proves out it could be quite useful. I paid $150 for a glass ...
8-9-2018 at 18:10
by: Magpie
Preparation of Diethyl Sulfate
Incorporating the changes just discussed the run today was made with a revised apparatus. A perista ...
8-9-2018 at 14:06
by: Magpie
Preparation of Diethyl Sulfate
Thank you Pumulki. After 16 years of collecting I do have all the gadgets I want. Give me a sketch ...
8-9-2018 at 08:14
by: Magpie
Preparation of Diethyl Sulfate
continuation of last post. Toggle picture to turn.

[file]70422[/file] [file]70424[/file]
7-9-2018 at 07:04
by: Magpie
Preparation of Diethyl Sulfate
[b]Preparation of Diethyl Sulfate (DS)[/b] 9/6/18

As before this prep followed the method of L ...
7-9-2018 at 06:56
by: Magpie
Solubility of natural resin
I suggest:

1. dissolve the resin in a terpene (limonene or turpentine).
2. extract the resin ...
5-9-2018 at 19:49
by: Magpie
Solubility of natural resin
Try limonene, which can be obtained from lemon, orange, grapefruit, and lime rinds (squeeze them to ...
5-9-2018 at 07:25
by: Magpie
Solubility of natural resin
I would suggest turpentine. If you can't find this try some other terpene.
4-9-2018 at 13:36
by: Magpie
Lab gadgets
This is true. I also bought one for small files, etc. They sold for $15 ea.
2-9-2018 at 19:29
by: Magpie
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