How do you get rid of extra triangles and/or select edge loops despite triangles?

I have an obj file I’m working with that has a ton of extra triangles instead of quads connecting between two vertices within almost every quad which for whatever reason inhibits selecting an edge loop. How can I remove all the triangles or select an edge loop that ignores triangles?

X / dissolve
Tris to Quads = Alt+J

Thank you very much, that did the trick for the most part.