Phenol → BPA phenol

HRID 32926Notes

Reaction equation

HRID 32926 reaction equation
[CH3:1][C:2]([C:11]1[CH:12]=[CH:13][C:14]([OH:17])=[CH:15][CH:16]=1)([C:4]1[CH:5]=[CH:6][C:7]([OH:10])=[CH:8][CH:9]=1)[CH3:3].[C:18]1([OH:24])[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>O>[OH:10][C:7]1[CH:6]=[CH:5][C:4]([C:2]([C:11]2[CH:16]=[CH:15][C:14]([OH:17])=[CH:13][CH:12]=2)([CH3:3])[CH3:1])=[CH:9][CH:8]=1.[C:18]1([OH:24])[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

4

Reactant 2

HCID 996PhenolHCID 6623Bisphenol A2×

Product 1

HCID 14618994BPA phenol

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

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. customseparating the adduct obtained in step (b)
  2. customby solid-liquid separation
  3. customto obtain a solid phase
  4. washa liquid phase d) washing of the solid phase with a solution
  5. additioncontaining phenol
  6. customto obtain
  7. washwashed solid phase
  8. distillationa second liquid phase, e) distilling the liquid phase
  9. customto obtain
  10. additionintroducing of at least 90% by weight of the dewatered solution into step (a)
  11. customto obtain a homogeneous material system that

Sources & evidence

ORD record
ord-3dbe239ce42d485b840f345a6a496bc1
Source dataset
uspto-grants-2008_09
Patent number
US07427694B2

Reaction notes

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