Reaktion #5742

Reaktionsgleichung

bisphenol A

→

phenol

bisphenol A

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeby crystallizing the adduct of bisphenol A with phenol (
2. 2
   Temperaturis cooled to a range of 35° to 70° C.
3. 3
   Sonstigeprecipitated crystals of bisphenol A-phenol adduct
4. 4
   Filtrationare filtered
5. 5
   Sonstigeto separate the crystals, and phenol
6. 6
   Sonstigeis evaporated from the crystals

Vorschrift

The process of preparing high purity bisphenol A by crystallizing the adduct of bisphenol A with phenol (hereinafter referred to as bisphenol A-phenol adduct) has been disclosed, for example, in Japanese Patent Publication SHO 63-26735(1988). That is, a phenol solution of bisphenol A which was prepared in the presence of a hydrochloric acid catalyst is cooled to a range of 35° to 70° C. while feeding 2 to 20% by weight of water to the solution under reduced pressure, precipitated crystals of bisphenol A-phenol adduct are filtered to separate the crystals, and phenol is evaporated from the crystals to obtain high purity bisphenol A.

Quelle