Breaking and making chemical bonds is something we do every day in all sorts of contexts. However, they're all very specific. If we want to turn X into Y, a lot of work goes into developing a process that is energy efficient, material efficient, etc.

We don't have any ability to drop a chicken bone into a slot and get back a neat pile of carbon, neat pile of oxygen, hydrogen, nitrogen and so on. Nor do we have the ability to start with those piles and make a chicken bone. This is just science fiction for now.

It would likely be fantastically energy intensive.