Complex sentence: It is prepared from distillation of acetone with sulfuric acid or by the trimerization of propyne in sulfuric acid, which in both cases acts as a homogenous catalyst and dehydrating agent.
Split into simpler sentences: It is prepared from distillation of acetone with sulfuric acid or by the trimerization of propyne in sulfuric acid. It acts as a homogenous catalyst and dehydrating agent.