You should have 2 solder-irons. Put much solder to that IC, move your hand with both 2 iron quickly.
It is easy if that IC is not so big. (Except for BGA )
By far, the cheapest is to use a hot air gun (paint striper), and a long tweeser.
Heat the chip, then pull it off the board.
This, assuming that you are interested in getting the chips, and not worrying about the board afterwards.
I use this method to remove 3-4 chips at a time
You take the chip out the same way you put it in. There are professional sodering and desoldering machine. How do you know the chip still good. You need to sort the accordingly. It's cheaper to buy surplus chip.