What is Bisphenol a bpa Hydrochloric Acid Method?
Bisphenol a bpa Hydrochloric Acid Method
Methods using hydrochloric acid or hydrogen chloride gas as catalysts are collectively referred to as the hydrochloric acid method. For example, a mixture of phenol and acetone is reacted with dry hydrogen chloride catalyst at atmospheric pressure and 50–60°C for 8–9 hours. When the volume fraction of gaseous hydrogen chloride remains above 96%, the main product is bisphenol A bpa, with by-products including its isomers, trihydroxy, or monohydroxy derivatives.
The bisphenol A bpa obtained by this method can be used as a raw material for epoxy resin production. Further purification is required if it is to be used for polycarbonate. The Hooker process, for instance, refines bisphenol A using vacuum distillation and extractive crystallization. The consumption rates per ton of bisphenol A bpa are approximately 0.855 tons of phenol, 0.269 tons of acetone, 0.216 tons of hydrogen chloride, and 0.011 tons of benzene solvent.
This method is well-established and can be operated in either batch or continuous production modes.