PROCESS FOR PRODUCTION OF BISPHENOL-A

摘要

Disclosed is a process for production of Bisphenol-A comprising a reaction step of supplying a phenol raw material and an acetone raw material into a reactor filled with an ion exchange resin catalyst to yield a reaction solution containing Bisphenol-A. The process includes a manipulation of temporarily suspending the reaction and subsequently resuming the reaction. For the suspension of the reaction, any one of the following manipulations (a) and (b) is included: (a) reducing the supply of the acetone raw material into the reactor and subsequently suspending the supply of both the acetone raw material and the phenol raw material simultaneously; and (b) suspending the supply of the acetone raw material and subsequently suspending the supply of the phenol raw material. In the process, the liquid part in the reactor after suspending the supply of the phenol raw material has a water content of 0.5 to 2% by weight. The process enables to prevent the deterioration of the ion exchange resin catalyst in the reactor when the reaction is suspended by reason of periodic inspection or the like and also prevent the decrease in activity of the ion exchange resin catalyst after resuming the operation, whereby Bisphenol-A can be produced for a long period in a stable manner.