Since the products are continuously exiting, the system never reaches equilibrium. The continuous formation of products causes the reaction to achieve completion. In most reactions carried out by catalytic distillation, the reactants are often more volatile than the products. Because of this, an internal recycling system, known as the reflux, is implemented right after the condenser (an area within the column where escaped gases are cooled down to liquids). The reflux transfers the concentrated vapor back to the catalyst area. The reflux also returns a portion of the condensed liquids to the column to ensure only the products with the lowest boiling points are captured. As the reflux returns impure mixtures, the catalysts are washed for a prolonged usage. Reactions within catalytic distillation columns include:   In two column distillation, the obtaining the desired product calls for a column for catalysis and then a column for distillation. This means that the distillation company would have to fund the construction of two large columns as well as a method for transporting the contents of one column to another. With catalytic distillation, the company only needs to fund one column which eliminates both the cost for a second column and the cost to move chemicals from one column to another. This optimization cuts overhead costs to nearly half the original cost. In addition to cutting costs, catalytic distillation is a milestone in efficiency and efficacy. Less time is spent because it is not necessary to move the contents from column to another. Also, the percent yielded from reactants to products increased in some reactions from 96-97% to 99.9%.