This tool would be one way. You have to thoroughly heat all of the pins at the same time. There are variations of this tip but I could only find this pic.
Another way is with a heat gun with a narrow funnel about 1/2" at the outlet.
lastly you could try and cut all the connecting pins and unsolder them one by one.
If this is a multi layer board, chances of success are pretty low. If not chances are better.
Pete