Phenol → BPA phenol

HRID 32925Notes

Reaction equation

HRID 32925 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.[C:18]1([OH:24])[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.[S]>CC(C)=O>[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.[C:18]1([OH:24])[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

5

Reactant 3

HCID 996Phenol2×HCID 6623Bisphenol A2×HCID 5362487Sulfur

Product 1

HCID 14618994BPA phenol

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A process for the preparation of high purity bisphenol A is disclosed. The multi-step process entails a) reacting phenol with acetone in the presence of an acidic ion exchanger and a sulfur-containing co-catalyst to give a product mixture that includes bisphenol A and phenol; b) continuously obtaining from the product mixture crystals of bisphenol A-phenol adduct by suspension crystallization, c) separating the adduct obtained in step (b) by solid-liquid separation to obtain a solid phase and a liquid phase d) washing of the solid phase with a solution containing phenol to obtain washed solid phase and a second liquid phase, e) distilling the liquid phase and said second liquid phase to obtain dewatered solution containing 5 to 15% p,p-BPA, 3 to 12% isomers of BPA and less than 0.3% water, f) introducing of at least 90% by weight of the dewatered solution into step (a), g) adding phenol to the washed solid phase obtained in step d) to obtain a homogeneous material system that contains p,p′-BPA, isomers of BPA and water h) continuously obtaining from the homogeneous material system crystals of bisphenol A-phenol adduct by suspension crystallization; i) separating the crystals obtained in step (h) by solid-liquid separation to obtain a second solid phase, j) washing the second solid phase with a solution that contains phenol to obtain a washed adduct; and k) heating the washed adduct to remove phenol.

Workup

  1. customto give a product mixture that

Sources & evidence

ORD record
ord-81f3d998cc034ba4850d0eb7c1044a5c
Source dataset
uspto-grants-2008_09
Patent number
US07427694B2

Reaction notes

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