If you follow his method, you'll find a white slime immediately precipitates. This isn't the oxime and that's obvious as it's a water-soluble slime. If you add the small amount of water as directed and put it in the freezer (1hr if your ketone is quite pure, longer) it should crystallize. If the oxime doesn't crystallize overnight, it ain't gunna... all you're going to get is a viscous oil of an oxime. I've tried hitting it with dilute HCl, etc, but it just doesn't seem to form crystals. (I never did try a recrystallization, the idea of recrystallizing an oil trying to get a crystal seems odd to me... could this work?) Anyways, so if it doesn't crystallize right there, add the rest of the water (ie the amount directed that you can use for washing). Then extract the oxime with DCM and rotovap off the DCM for the uncrystallized oxime oil.
To clarify in non-ambiguous terms, reflux for 45min - 90min:
1.25 eq hydroxylamine salt
1.35 eq base
1 eq ketone
750ml alcohol
150ml water
... if you're using bicarbonate as the base, go slow as the rxn produces a lot of CO2. Then add 400ml water, move to freezer. If it doesn't crystallize, add 2L of water, separate off most of the oxime and extract with DCM (wash with dilute acid and rotovap). If it does crystallize, filter at the pump and wash the oxime with up to 2L water.
The tmp2p was made by the buffered peracetic in dcm followed by 15% H2SO4 in MeOH rearrangement. The yields were crummy (but the product yummy!) as the tmp2p wasn't distilled. I posted the info (and then tripped out, posting on the board) the info of my first success with this route.
Although I do really like the clean up in your procedure, in the end you deal with harder to obtain/make/handle reagents and there's no clear advantage.