06-17-03 18:44
No 440633
hmm, SWIM started distilling of DCM a lot of vapour was coming out of the system so in order not to stink up the lab SWIM put a hose on the end of the vacuum adaptor and put the other end into water and went for a cig, came back to the entire system backlogged with salted h2O, hmmm formed an interesting percepitate that SWIM filtered off, and procedded to distill, after this and another fuckup where the vacuum pump lost vacuum and oil; got sucked back into the recieving flask SWIM was able to recover 88g already had 26g from previous distillation, so overall decent yields considering the fuckup
Now for the interesting part, when SWIM started to clean up he noticed that the heating flask had a metallic finish to the inside bottom ( uh oh) so SWIM is assuming it's a sodium base, now how in hell does SWIM get this off!(dcm,Acetone, xylene, kerosene all didnt work0 maybe sulfuric acid of hydrochloric acid?
(Stranger)
06-17-03 19:29
No 440640
sulfuric and Hydrochloric dont seem to work, no other acids on hand, any ideas?
(Stranger)
06-17-03 20:54
No 440656
any idea how to get this out of a flask, it seems nothing works just a thin metallic film around the bottom, 98% sulfuric didnt even touch it
(Hive Bee)
06-17-03 21:43
No 440666
HNO3 would probably do the trick. Mabe you should try pirhana fluid. its conc H2SO4 and H202.
(Hive Addict)
06-17-03 21:44
No 440667
Mabe you should try pirhana fluid.
Maybe not
For those about to synth,we salute you
(Hive Addict)
06-17-03 22:06
No 440673
If it is indeed a metalllic film, then aqua regia will get it. But it might be that you etched a thin film off of your flask, which means that it won't come off with anything.
It is seductive, way too seductive. -Eleusis
(Stranger)
06-17-03 22:39
No 440680
a 10% solution of NaOH in H2O worked well got 99% of it off, as far as pirana solution SWIM doesnt have H2O2 around nor the other acid needed for aqua regia
07-20-03 15:48
(Rated as: insignificant)
(Hive Addict)
07-21-03 01:22
No 448777
Raf has never had any problems getting ketone flask clean.-He really sees no good in letting the post ketone polymer goop cool down so you most throw that flask away.When all ketone is out,let flask cool to 130C or so and add some xylene and you polymer goop comes out with xylene and your flask is as clean as it was before distilling.Then a little rinse with sulfuric acid and your flask is like new.Don't get excited and throw that flask with goop somewhere and then find someday that goop has become solid.
For those about to synth,we salute you