grellobanans
(Stranger) 03-26-03 10:38 No 421479 |
Is This Vacuum Adapter OK to use? | Bookmark | ||||||
I found one of those vacuum adapters with long drip tip, but the drip tip broke off. I put a short hose over the broken part to act as a drip tip. My question is, is this adapter safe to use under vacuum? Will the broken drip tip mess with the strength of the glass? Implosions are not fun. |
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raffike (Hive Addict) 03-26-03 10:51 No 421482 |
but the drip tip broke off Wierd,drip tube/tip | Bookmark | ||||||
but the drip tip broke off Wierd,drip tube/tip is pretty inside of the adapter,how did you manage that?Anyways i think you can still use For those about to synth,we salute you |
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grellobanans (Stranger) 03-26-03 12:44 No 421506 |
drip tip | Bookmark | ||||||
the drip tip IS inside the adapter, but this particular one was designed so that the drip tip extends even further past the ends of the adapter a few cm so when connected to a flask, a few cm of the tip is actually inside the flask. I hope that clarifies things. |
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raffike (Hive Addict) 03-26-03 12:48 No 421507 |
Guess you have to just try,if stuff jumps into | Bookmark | ||||||
Guess you have to just try,if stuff jumps into your vacuum hose,it is not ok,but otherwise,yes. For those about to synth,we salute you |
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madprosr (Hive Bee) 03-27-03 20:53 No 421895 |
swim has a vac adaptor with no drip tip left... | Bookmark | ||||||
swim has a vac adaptor with no drip tip left at all, and a crack running vertically down to the chipped male-connector. ketone still drips from the middle though so it skips past the vacuum nozzle. swim threw some ptfe paste on the vac-adaptor and pulled some mdp2p at 85-89C. it forms hard chunky oxime crystals from nh2oh so purity is okay. vac adaptor held up fine. swim is just making do until he can have some new glass sent, like a vigreux for 20bux, and much much more... |
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DrBumpz (Newbee) 03-27-03 22:32 No 421922 |
madprosr, what... | Bookmark | ||||||
This has nothing to do with the original question.Madprosr, what damn vacuum source are you using? Pulling ketone at 85C! Most GOOD vacuums get it at about 100-140C, I thought. Do tell! Dr. Bumpz is 'da hottest chick on 'da Hive!! Hehehehe! |
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pickler (Greenhorn) 03-28-03 11:34 No 422062 |
85c is good, but not uinheard of.A common hvac | Bookmark | ||||||
85c is good, but not uinheard of.A common hvac pump will pull ketone over at this temp. I went into the business for the money, and the art grew out of it.-Charlie Chaplin |
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yinga (Hive Bee) 03-28-03 11:51 No 422069 |
SWIM distilled MDMA freebase at 79-80 C with a | Bookmark | ||||||
SWIM distilled MDMA freebase at 79-80 C with a ritchie yellow jacket 2 CFM model. Is this too strong for good seperation? |
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Noid (Hive Bee) 03-28-03 17:01 No 422128 |
pump debates | Bookmark | ||||||
Some bee's say it's too strong, but for the life of me, I don't see why.. if safrole comes over at 60c and ketone at 85, then how is the separation going to get any better at 100/125?! But anyway, the only downside to having a strong pump like that is the fact that you will need another pump thats not nearly as strong to distill water/solvents. If you are getting your ketone at 85c, then I bet your pump will boil water @ atmospheric pressure. 100% _______ |
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raffike (Hive Addict) 03-28-03 23:19 No 422197 |
My 10 mm pump boils water @ 10 degrees.Pump... | Bookmark | ||||||
My 10 mm pump boils water @ 10 degrees.Pump that pulls ketone over @ 80C should pull about 0,05 torr or close to that.Good pump ya got there mon. For those about to synth,we salute you |
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pHarmacist (Hive Addict) 03-28-03 23:22 No 422199 |
Ok.. | Bookmark | ||||||
My 10 mm pump boils water @ 10 degrees Have you actuallty verified this by experiment? Accept No Imitations, There Can Only Bee One; www.the-hive.ws |
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raffike (Hive Addict) 03-28-03 23:27 No 422200 |
Yes,a week ago.Filled volumetric flask half... | Bookmark | ||||||
Yes,a week ago.Filled volumetric flask half full with 10C water and attached to pump.Then at some point water started boiling violently.0 degree water and 5 degree water didn't start to boil even if i waited few minutes.Then grabbed monograph and looked for corresponding pressure.I reached the same conclusion when i pulled MDP-2-P over @ 150C.Nomograph gave me 10 mm which is not very good but enough for me at this point. For those about to synth,we salute you |
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madprosr (Hive Bee) 03-29-03 11:47 No 422320 |
just a Mastercool 250micron rotary vane pump. | Bookmark | ||||||
just a Mastercool 250micron rotary vane pump. my point was that swim pulled 100 microns on a cracked vac adaptor without it shattering. the pump used to pull mdp2p around 100C. then swim feed it some residual dcm and switched to a braided-hose, which somehow boosted it to like 100 microns. ketone purity is ok at 85-89C, if you remove the forerun repeatedly. swim got 14g mda.hcl from 21.25g ketone via the oxime, which is okay... swim will never use MeOH in the AcOH/al/hg again btw. post-rxn he added brine/base 3x vol of the MeOH and still got persistent emulsions when extracting with toluene... |
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raffike (Hive Addict) 03-29-03 11:58 No 422321 |
Is there heavy bumping when distilling ketone... | Bookmark | ||||||
Is there heavy bumping when distilling ketone @ so low temperature?Raf distills his ketone without stirring,there is some bumping but i can live with that. For those about to synth,we salute you |
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abolt (Hive Bee) 03-31-03 00:54 No 422666 |
Capillary | Bookmark | ||||||
With the good quality pump you mentioned, raf, you could get away with using a capillary, in order to avoid bumping. Do you think your Ketone seperation is going to be good at such a low temp? Swim would say that 130 C. would be a good temp to start collecting ketone at. If I am wrong, educate me If I am right, educate yourself |
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raffike (Hive Addict) 03-31-03 08:54 No 422782 |
150C and low temp?Raf pump is just little... | Bookmark | ||||||
150C and low temp?Raf pump is just little better than aspirator.I was referring to somebee who pulls his ketone over @ 80 C.Good pumps are expensive and cool,but raf thinks 150 C will do no harm to MDP-2-P so he doesn't plan buying new one. For those about to synth,we salute you |
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