I was inspired to do a bit of research:

The liqueur Curação is named after the island Curação, which is part of the Netherland Antilles. The natives of Curação speak a Creole language called Papiamentu whose vocabulary derives mostly from Portuguese, Spanish, and Dutch.

"Coração" is the Portuguese word for "heart," the equivalent of the Spanish "corazón." So I assume "Curação" is simply the Papiamentu spelling, or perhaps an obsolete Portuguese spelling.

As near as I can figure, the syllable "ção" is pronounced exactly like the French pronunciation of the word "cent" (hundred).