Abstract: Processing facilities, systems, devices, equipment, and associated methods of processing for recycling thermosetting polymers are described herein. In one example, a process includes reacting, under atmospheric pressure, a thermosetting polymer with a catalytic solution containing a solvent having sulfolane and/or a derivative thereof. The reaction converts the thermosetting polymer to polymer fragments dissolvable in the sulfolane and/or the derivative thereof of the catalytic solution. The process then includes causing the polymer fragments to precipitate as solid polymer fragments from the catalytic solution and separating the precipitated polymer fragments from the catalytic solution. As such, the thermosetting polymer can be recycled as the solid polymer fragments.