I don't think Henrik Hank has ever been a member of the Coptic church to begin with.
You are asking about what the relationship between the Catholics and the Coptic church is, right Henrik Hank? If so, Geomike is right: You won't really have any relationship with the Coptic church if you're a Catholic. The two aren't in communion, and have many differences in faith and practice. There is no real relationship between the two, beyond maybe some nice feelings between individual laypeople or others (none of which amount to any shared faith or communion).