Bisphenol A → Phenol

HRID 5646

Reaction equation

HRID 5646 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([C:11]2[CH:16]=[CH:15][C:14]([OH:17])=[CH:13][CH:12]=2)([CH3:10])[CH3:9])=[CH:4][CH:3]=1>O>[C:2]1([OH:1])[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[OH:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([C:11]2[CH:12]=[CH:13][C:14]([OH:17])=[CH:15][CH:16]=2)([CH3:10])[CH3:9])=[CH:6][CH:7]=1

Participants

4

Reactant 1

HCID 6623Bisphenol A

Product 2

HCID 996PhenolHCID 6623Bisphenol A

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

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.

Workup

  1. customby crystallizing the adduct of bisphenol A with phenol (
  2. temperatureis cooled to a range of 35° to 70° C.
  3. customprecipitated crystals of bisphenol A-phenol adduct
  4. filtrationare filtered
  5. customto separate the crystals, and phenol
  6. customis evaporated from the crystals

Sources & evidence

ORD record
ord-38c85ad4634b442cbe5132fd78f0ba93
Source dataset
uspto-grants-1993_09
Patent number
US05245088

Linked notes

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