Is your kitchen on the first floor? If so, you aren't going to be able to laminate enough 2x's together to span 10 feet. Four 2x12's together can only span a maximum of 8'4" if the house is two stories and the room width (perpendicular to the wall) is less than 20 feet. Sounds like you will need an engineered beam for your ten foot span.
There is a span table posted in this thread:
Load Bearing Wall / Additional Support Needed???
Besides, you will also have to worry about load paths to the foundation and possible new point loads.