What in the world are you talking about? Your grammar doesn't even make any sense. I'm guessing this is what you're saying:
"Mix potassium nitrate and sodium nitrate and dissolve them in ethane. Add this to methanol and light. What would happen?"
Well, you'd wind up with a lot of potassium and sodium nitrate on the bottom of the container, and a nice methanol flame. The ethane would be completely gone. The potassium and sodium nitrates are barely soluble in methanol at all. At best, you'd have a weak, crappy orange sodium flame. You'd be better off burning wood.