Phenol is one of the most important starting materials for various chemical products. The major process to produce phenol is the CHP route because of high CHP conversion and phenol yield and its mild reaction conditions. Acetone, an important chemical, is coproduced with phenol in this process in nearly same yield. A problem is: the future demand for acetone will decrease, while the demand of phenol will enormously increase. Unfortunately this means the phenol production is in part dependent on the demand for acetone, which is rising at a lower rate than phenol, and so in the future acetone...