Wacker Ketone Wash BIG Problem - Help Please!

[Bubbleplate]

Ran MMan Wacker as usual, fine. Post reaction: 2 washes with sat. Sodium Bicarb - fine. Two washes sat NaCl - fine. (Oil on BOTTOM layer all washes.)

First wash with 5% NaOH ran well: Got 2 very distinct layers - one on BOTTOM was pinkish red cloudy, which I assume was the NaOH/H2O with garbage from  Wacker;  TOP layer was deep blackish Oil. However, when second NaOH wash was done whole sep funnel turned into one pinkish-black solution, with NO separation between layers, and no layers visible - not even the "normal hard to see one". Let sit awhile, still no separation. Added some Sodium Bicarb, and still nothing!
Finally added dH2O, got 2,500 ml total mess in funnel; got some "oil" to go to bottom, but still couldn't see layer separation; sep funneled by Methylene Cl. smell. However, "oil" doesn't look right, and the amount is more than should be, and looks like alot water/salts in there... Finally poured everything back together in 5 gallon can.

1) How can I salvage this?  Was thinking could pour everything back together in big beaker and add more Methylene Chloride and Sep??? Or??
2) WHY did this happen? The first NaOH wash layers were so damn sharp and distinct (I was tempted to stop washing after the 1st NaOH wash cause oil looked so good) So why did second turn into that Pink-Black homogenous mess??
3) How long do I have before Ketone deteriorates in this state?
Any help appreciated!
If they drive God from the earth, we shall shelter Him underground - Dostoevsky

[Diggity]

First wash with 5% NaOH ran well: Got 2 very distinct layers - one on BOTTOM was pinkish red cloudy, which I assume was the NaOH/H2O with garbage from  Wacker

NO!! The bottom layer is your oil.
& I'm, somethin of a phenom, 1 puff of da cron, I'm un-stopable.   
 

[Rhodium]

The density of methylene chloride is higher than water, so if you have one layer of each, the water will always be on top as long as there aren't any other low-density non-polar solvents in the mix.

[GOD]

Swim doesnt know shit about wackers (except for romantic evenings with self), but he does know about emulsions.  Sounds like swiy has himself a big emulsion.
For dealing w/emulsions try:
-run mixture through a buchner funnel (no filterpaper)
-gently poking it with a stick (mess with it with a glass rod- not a very effective technique btw)
-adding NaCl (the kosher kind) to make the polar layer more polar
-warming up the solution (however, this may not bee a good idear as ketone is present)
-gentle rocking of solution
-giving it time (it should separate, however as you have stated, ketone doesnt store so well specially if theres a bunch of impurities)

Hope that helps some.
The best 'cure' for emulsions is not forming them in the first place, that means GENTLE addition of immiscible solutions (when adding, try to make it so the liquid doesnt 'drop' into container, make it have contact with the side of the container and run down.  Also, when washing or extracting, if there are a series of washes to bee done, ALWAYS start gentle, even just lightly swirling (remember to vent) and stop every once and a while to see whats happening, if an emulsion starts to form, dont continue to shake the shit out of it hoping to clear it up, thats the worst thing you can do.  Swim'll usually go real gentle for the first wash, then slightly more agressive on the second etc...

[Diggity]

Im going to start preaching about the wacker dcm additions..

I think they should really be done separatley and distilled separately. Swim has scene the 3 layers before and wasn't too sure what to do about it. Almost appeared to be emulsion. DCM/naoh seems prone to emulsion.
& I'm, somethin of a phenom, 1 puff of da cron, I'm un-stopable.   
 

[Bubbleplate]

I thought it was kinda strange that the oil layer, which was always on the bottom in previous washes, should appear on top. Now I know that the "pinkish" layer on the bottom WAS the oil. (Damn! Never do sep when very tired.....)
Well, back to my original question:

1) I have last 2 washes and Oil combined -can I salvage by adding excess of Methylene Chloride and re-separate??

2)If I wait day or two to extract, will ketone be ok?
If they drive God from the earth, we shall shelter Him underground - Dostoevsky

[Bubbleplate]

I learned many years ago NEVER to throw anything out before final product in hand. And YES - now that I think about it, that's EXACTLY what the bottom and top layers looked liked after the 1st NaOH wash!!! ( I feel, how they say, STUPID)
Soooo... That being the case, I have a gallon jug with the oil and previous washes in it; Best way to re-cover Ketone?
If they drive God from the earth, we shall shelter Him underground - Dostoevsky

[Diggity]

Good thing you saved it. Just re separate, OIL ON THE BOTTOM!  
& I'm, somethin of a phenom, 1 puff of da cron, I'm un-stopable.   
 

[potisgood]

NEVER WASH KETONE WITH BASE!!!!  Strong base and acid polymerize ketone!  Any extreme pH will destroy ketone.

[Diggity]

Really???

Well, either way, bubbles naoh addition should still be 5%
& I'm, somethin of a phenom, 1 puff of da cron, I'm un-stopable.   
 

[Rhodium]

potisgood: Now you are exaggerating. You need to wash out the aqueous base-soluble impurities at that point in the synthesis. If you feel bad about having a sodium hydroxide solution in contact with your organic ketone phase (none of the NaOH will migrate to the DCM anyway), then use 10% sodium carbonate for the washes instead.

But never let MDP2P stay in contact with a strong base for extended periods of time, only for so long it takes to perform the washes.

[Bubbleplate]

75% or so of the oil. Added some new Methylene Chloride to saved stuff, sep funeled everything, and gave a few washes. Thanks for everyone's help!
BTW, I've found that #4 Molecular Sieves are super for drying Oil. A few grams really sucks up the H2O, and you can see the oil getting nice and black around them. Great stuff even if pricey.
I've posted a big sign in the lab for future reference:
OIL=BOTTOM
WATER=TOP
ALWAYS!


If they drive God from the earth, we shall shelter Him underground - Dostoevsky

[Osmium]

> OIL=BOTTOM
> WATER=TOP
> ALWAYS!

It's stupid generalisations like this that make people pour the wrong layer down the drain.

Use some common sense, your nose, and a small vial filled with water to figure out which layer is the non polar when in doubt.

I'm not fat just horizontally disproportionate.

[goiterjoe]

That generalization will cause him a lot of heartache with other NP solvents.
All paths are the same: they lead nowhere

[Bubbleplate]

I was just kidding around about the sign. And I meant it only for the NaOH wash of the Wacker, not in general. You have to admit that the appearance change of the Ketone from dark black oil to that pinkish-tan stuff in the first NaOH wash, and then back could be confusing for someone doing it for the first time. It was to me anyway.
Whatever. Not likely a mistake I'll ever make again. Now I've got the Wacker down pat. You live and learn.
If they drive God from the earth, we shall shelter Him underground - Dostoevsky

[scram]

I hope the damage with NaOH is minimal. Maybe this is the results for swims maximum 50% molar yields on O2 wacker. I read somewhere here that acidic solutions destroy the ketone over time. BTW, swim just used activated charcoal from fish store to take up the pdcl2/cucl2. WORKED AWESOME! Emulsions are no longer a problem. Took the the post wacker straight to 40g of charcoal and stirred prechilled solution for 30 minutes. The decanted off charcoal, acidified the black solution. Washed once, basified, charcoal immediately formed its own layer and toluene was light yellow. It reduced amount of washes by almost 66%. Does anyone know if charcoal holds some of the ketone. It was rinsed with MeOH and then Toluene. Rhodium, when swim washed with EDTA, he saw no color change in the EDTA solution or the Toluene/ketone layer. Should he wash the ketone without it being in a solvent. Meaning EDTA+water/Ketone oil.

[Rhodium]

There should not necessarily be any color change of the EDTA solution after the wash - do you know for a fact that Cu or Pd EDTA complexes are colored? Rather look at your ketone solution, do you still have the same problems with it as before, whatever the Cu/Pd caused?

[scram]

I dont know. Process of elimination is being done to determine if the low yields are 1) wacker related (just low yields), 2) residual cucl2/pdcl2 possibly reducing al/hg yields (attaching to al or something during amination?) 3) undistilled ketone (wacker side reactions) are affecting al/hg yields. In the third scenario swim has no choice but to distill.

[goiterjoe]

Why are you bitching about yields if you aren't even distilling your ketone?  You should feel lucky that you're getting anything at all.  If you want to improve your yeilds, then you will have to distill. 
All paths are the same: they lead nowhere

[Rhodium]

I think your problem is with 90% certainity due to your non-distillation of the ketone. Not doing that is plain stupid. All the contaminant will criss-cross react with the ketone, the imine and the final freebase, not even touching on the subject of what it may do with the reducing efficiency of the Al/Hg reducing system...