Author Topic: Short Questions Thread (Read 10825 times)

2bfrank · « **Reply #800 on:** April 13, 2011, 08:54:42 AM »

Dissolving metal reductions using n-propylamine/ethylamine , any one know of any success with this. Thanks in advance. I have a paper that reports Methylamine with crown ethers. VERY interesting.

Evilblaze · « **Reply #801 on:** April 13, 2011, 07:20:11 PM »

Is there any known just N substitued methylenedioxyamphetamine analog what is highly active, similar to MDMA, except the followings:
MDMA (methylenedioxy-N-methamphetamine)
MDA (methylenedioxyamphetamine)
MDEA (methyenedioxy-N-ethylamphetamine)
N-hydroxy MDA (methylenedioxy-N-hydroxyamphetamine).

From the molecule just the amine could be substitued, non of the carbons, or hydrogens.

My first idea was a prodrug like fenethylline, just in this case the methylenedioxy analog or a pyrrolidin analog or something like that.

Any ideas would help a lot!

2bfrank · « **Reply #802 on:** April 13, 2011, 10:01:48 PM »

That paper I mentioned, I may as well post it here re

Methylamine w Crown ethers, for disolving metal reductions.

ps, I only skimmed this. oops, hope its okay

2bfrank · « **Reply #803 on:** April 14, 2011, 02:33:43 AM »

Hey all, whats the best way to store Bromine. I want to do the DBDMH reaction, and haven't had that much experience with collecting BROMINE itself. I got plans for it, but will need to store it. YES YES, I should UTFSE, but lots of info, and thought best to just ask here. thanks for any help with this.

lugh · « **Reply #804 on:** April 14, 2011, 02:45:25 AM »

You should have looked here:

https://www.sciencemadness.org/talk/viewthread.php?tid=5572#pid63223

akcom · « **Reply #805 on:** April 14, 2011, 02:47:01 AM »

Anyone know the density of MDP2P? ref from the hive would be appreciated. Also, the boiling point. Wikipedia says ~250, but extrapolating from Shulgins notes you get 275-281C which is more in line with what I'm getting on my vacuum

Shake · « **Reply #806 on:** April 14, 2011, 03:44:42 AM »

hey can i ask what vac pump you are using? is it diaphram or rotary vane?

akcom · « **Reply #807 on:** April 14, 2011, 03:48:08 AM »

rotary vane, I've never seen a diaphragm get that low.

Shake · « **Reply #808 on:** April 14, 2011, 04:06:48 AM »

hey i been meaning to find something out, i have been through 1 rotary vain vac pump so far obviously from distilling solvents which ended up in the pump and wrecked it.. my new one i have only used a couple times but if i want to distill solvents i will have to use no vaccum i guess, but then again solvents and high temps are sometimes not a good mix either..

my question is, are you using any type of filter on the vac line so it only pulls in clean air rather than solvent vapours? what did you use?
also how often do you change your vac oil

from memory ketone boils at around 250

RoidRage · « **Reply #809 on:** April 14, 2011, 04:11:46 AM »

Quote from: akcom on April 14, 2011, 02:47:01 AM

Anyone know the density of MDP2P? ref from the hive would be appreciated. Also, the boiling point. Wikipedia says ~250, but extrapolating from Shulgins notes you get 275-281C which is more in line with what I'm getting on my vacuum

Chemspider, which is considered a realiable source AFAIK, states than the density 1.211g/ml and that the boiling point is 275.9C @ 760mm

Hope it helps

Vesp · « **Reply #810 on:** April 14, 2011, 04:40:56 AM »

Quote from: Shake on April 14, 2011, 04:06:48 AM

hey i been meaning to find something out, i have been through 1 rotary vain vac pump so far obviously from distilling solvents which ended up in the pump and wrecked it.. my new one i have only used a couple times but if i want to distill solvents i will have to use no vaccum i guess, but then again solvents and high temps are sometimes not a good mix either..

my question is, are you using any type of filter on the vac line so it only pulls in clean air rather than solvent vapours? what did you use?
also how often do you change your vac oil

from memory ketone boils at around 250

For distilling harsh solvents consider an water jet vacuum pump/aspirator -- they can boil water at room temperature if the water that runs through them is a bit colder. Pretty good and clearly resistant to almost any chemical you might suck up into them.

2bfrank · « **Reply #811 on:** April 14, 2011, 11:08:36 AM »

Quote from: Tungsten. on April 04, 2011, 09:12:07 PM

Anybody know the solubility of lysergic acid in ethanol?

No, but if you send me some, i will promise to send you a detailed report. hahahaha.

akcom · « **Reply #812 on:** April 14, 2011, 01:52:07 PM »

Quote from: Shake on April 14, 2011, 04:06:48 AM

hey i been meaning to find something out, i have been through 1 rotary vain vac pump so far obviously from distilling solvents which ended up in the pump and wrecked it.. my new one i have only used a couple times but if i want to distill solvents i will have to use no vaccum i guess, but then again solvents and high temps are sometimes not a good mix either..

my question is, are you using any type of filter on the vac line so it only pulls in clean air rather than solvent vapours? what did you use?
also how often do you change your vac oil

from memory ketone boils at around 250

For taking off solvents, running columns, and making methylamine I use a gast diaphragm pump. Before I had that pump, I would change the oil on my rotary vane every time it turned black (usually every time I ran DCM through it). Worked like a charm and I'm still using the same pump today.

I looked into a water aspirator before getting my gast, but after getting the aspirator + the pump to push water through it the price was almost the same. The gast is perhaps a bit stinkier since a little bit of the DCM just flies right out the output, but I just run the output hose somewhere innocuous. Plus the compressed air on the gast is useful for drying flasks quickly after rinsing them with acetone

letters · « **Reply #813 on:** April 23, 2011, 05:20:59 PM »

Quote from: Shake on April 14, 2011, 04:06:48 AM

hey i been meaning to find something out, i have been through 1 rotary vain vac pump so far obviously from distilling solvents which ended up in the pump and wrecked it.. my new one i have only used a couple times but if i want to distill solvents i will have to use no vaccum i guess, but then again solvents and high temps are sometimes not a good mix either..

my question is, are you using any type of filter on the vac line so it only pulls in clean air rather than solvent vapours? what did you use?
also how often do you change your vac oil

from memory ketone boils at around 250

ptfe diaphragm pumps are whats used when evaporating solvents. KNF pumps as well as Vacuubrand are excellent and even their non PTFE types will handle most vapors. I use an all ptfe KNF membrane pump that pumps down to roughly 5mmHg and is very sturdy. i imagine it will last as long as i will. they can be a bit pricey in the U.S. but well worth the investment!
another common method used to protect oil pumps is to use a cold trap. mine is made by Savant. ive tweaked it a bit (changed the compressor and gas) and it now produces a temp of (-60)-(-80)degC depending on which solvent i use as a heat transfer medium. you can get those for a couple hundred bucks off of ebay. also dry ice/acetone bath works excellent to protect oil pumps from solvent vapors.

Methyl Man · « **Reply #814 on:** April 23, 2011, 05:44:39 PM »

I just searched through many many pages of Google results and found not a single source. All search results I found are for research papers where they used it, or synths like the limonene --> THC one that I'm interested in. But not a hint of any place selling it. Thanx
MM

lugh · « **Reply #815 on:** April 23, 2011, 06:09:37 PM »

Quote

I just searched through many many pages of Google results and found not a single source.

Please read the site rules:

http://127.0.0.1/talk/index.php/topic,369.msg3325.html#msg3325

Shake · « **Reply #816 on:** April 23, 2011, 06:23:34 PM »

for the vapours i was going to empty the charcoal filters from a gas mask fill up a car petrol filter type cannister with it, then connect it on the vac line..

that charcoal/carbon whatever it is can absorb an unbelievable amount of solvent. even pouring pure MEK into the dust mask it would not come out the other side until there was at least 200mills poured directly into the filter,

this will leave my rotor vane oil as pure as the tone it pulls

pyramid · « **Reply #817 on:** April 23, 2011, 06:32:35 PM »

That will not work for vacuum distillation, you need a cold trap. Using a cold trap is the only way to avoid sucking in solvent and water vapors when using a mechanical pump.
You should buy or make a water aspirator, they are handy for evaporating lower boiling solvents, and if running water is an issue you can build a recirculating aspirator.

Shake · « **Reply #818 on:** April 23, 2011, 07:00:41 PM »

on the vac line? a carbon/charcoal fillet unit, designed to filter gasses out for human lungs... those filters are pretty efficient... i can make an aspirater easy peezy but if the gass mask filter wont stop solvents getting in the pump then why do they work on our lungs?

pyramid · « **Reply #819 on:** April 23, 2011, 07:08:12 PM »

Yes, on the vacuum line
The vacuum pump pulls a much stronger vacuum than the lungs, if the carbon worked I think a lot more people would be using that (I haven't actually heard of anyone using it) as it would be way easier than a cold trap. But under the vacuum it just does not work, it still gets pulled throughh.
I would say it is best to just build the aspirator, it will be handy for many other things you want to do aswell.

Author Topic: Short Questions Thread (Read 10825 times)

2bfrank

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