How to de-solder Atmega 328P (Arduino chip)

How to de-solder a TQFP package.

If your chip has a lot of pins, it's recommended to:
either use a hot plate or replace the existing solder with a solder with a lower melting temperature.

ChipQuick has quite a few low temperature solder Alloys on their site to pick from(not an affiliate link):

Hot air station: 858D (set at 400°C)
Microscope: Mustool G1200
Fume extractor: FA-400 (clone)