Bisphenol A → bisphenol-A methanol

HRID 1757692Notes

Reaction equation

HRID 1757692 reaction equation
BrC1[C:7]([OH:8])=C(Br)C(Br)=C(C(C2C=CC(O)=CC=2)(C)C)C=1Br.[OH:22][C:23]1[CH:28]=[CH:27][C:26]([C:29]([C:32]2[CH:37]=[CH:36][C:35]([OH:38])=[CH:34][CH:33]=2)([CH3:31])[CH3:30])=[CH:25][CH:24]=1>CO>[CH3:7][OH:8].[OH:22][C:23]1[CH:24]=[CH:25][C:26]([C:29]([C:32]2[CH:33]=[CH:34][C:35]([OH:38])=[CH:36][CH:37]=2)([CH3:31])[CH3:30])=[CH:27][CH:28]=1

Participants

4

Reactant 2

HCID 6623Bisphenol AHCID 542409822,3,5,6-Tetrabromo-4-[2-(4-hydroxyphenyl)propan-2-yl]phenol

Product 1

HCID 131719113bisphenol-A methanol

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

Briefly describing one aspect of the present invention, there is provided reduced methyl bromide methods for making high yield, high quality tetrabromobisphenol-A using methanol solvents including dissolving bisphenol-A in a methanol solvent to form a bisphenol-A methanol solution, adding bromine to the bisphenol-A methanol solution to brominate bisphenol-A and form tetrabromobisphenol-A and hydrogen bromide, exposing the bisphenol-A methanol solution to an amount of a hydrogen peroxide agent to reduce the amount of methyl bromide co-product resulting from the bromination of bisphenol-A in methanol by reducing the amount of hydrogen bromide co-product available to reach with the methanol, and collecting the resulting tetrabromobisphenol-A product thus formed after the bromination is substantially complete.

Sources & evidence

ORD record
ord-8198559d3ad543bcba51591e89fd8178
Source dataset
uspto-grants-1995_08
Patent number
US05446212

Reaction notes

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