I’ve looked into it. Spun some ethanol+extract at about 10,000 rcf in a lab scale fuge for over a half hour. No separation or even really a gradient across the fluid in the tube. A big enough continuous disc stack centrifuge could do it in theory, though the couple of fuge catalogs I’ve got on my desk only list rcf ratings up to about 11k.
I’ve got my eye on a smallish clarifying fuge that will do about 20k rcf in a continuous manner, might play with it one day when I have more free time/money.