Water → Phenol

HRID 1636189Notes

Reaction equation

HRID 1636189 reaction equation
O.[CH3:2][C:3](C1C=CC(O)=CC=1)([C:5]1[CH:6]=[CH:7][C:8]([OH:11])=[CH:9][CH:10]=1)[CH3:4].[C:19]1([OH:25])[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>CC(C)=O>[C:8]1([OH:11])[CH:9]=[CH:10][CH:5]=[CH:6][CH:7]=1.[C:3]([C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][C:19]=1[OH:25])([CH3:4])=[CH2:2]

Participants

6

Reactant 3

HCID 962Water2×HCID 996PhenolHCID 6623Bisphenol A

Product 2

HCID 996PhenolHCID 112979922-Hydroxy-alpha-methylstyrene

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent2×

Procedure

The mother liquor from the primary system contains water, acetone, impurities and residual BPA. This mother liquor is passed through preheaters into a flash chamber where the water, acetone and a portion of the phenol is flashed to a vapor. This vapor is fed to a distillation column for separating the water and acetone from the lower vapor pressure phenol. The bottoms stream from the flash chamber includes a concentration of impurities and residual BPA in a phenol carrier. From this stream, a small purge is taken to a catalytic decomposition zone where the phenol is distilled overhead and the BPA and impurities are cleaved at high temperature to form phenol and isopropenyl phenol. Phenol is recovered as raw material and recycled to the reaction zone. Uncleavable "heavies" and polymers are purged from the system as "tars." The balance of the flash pot bottoms stream is recycled to the reaction zone.

Workup

  1. distillationThis vapor is fed to a distillation column
  2. customfor separating the water and acetone from the lower vapor pressure phenol
  3. customFrom this stream, a small purge
  4. distillationis distilled overhead

Sources & evidence

ORD record
ord-ec89ecfc02f648eab3f2c969fc4a232c
Source dataset
uspto-grants-2000_03
Patent number
US06033635

Reaction notes

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