P-Xylene → Methyl 4-methylbenzoate

HRID 845859Notes

Reaction equation

HRID 845859 reaction equation
[C:1](OC)(=O)[C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][CH:3]=1.CC1C=CC(C)=CC=1>CO>[C:2]1([CH3:1])[CH:3]=[CH:4][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:10][CH:11]=1

Participants

4

Reactant 2

HCID 7809P-XyleneHCID 8441Dimethyl terephthalate

Product 1

HCID 7455Methyl 4-methylbenzoate

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

U.S. Pat. No. 4,126,755 and the corresponding German Offenlegungsschrift P2244662.4 disclose a method of producing dimethyl terephthalate from high-boiling tarry residues resulting from the combined oxidation of p-xylene and methyl p-toluate with air, esterification of the resulting acids with methanol and after-treatment of the esterification reaction product, which comprises treating the high-boiling residues with methanol at a temperature above 250° C., and thereafter separating the resulting dimethyl terephthalate in accordance with conventional separation techniques.

Sources & evidence

ORD record
ord-0a3df983f4594768af71cce976aa25d1
Source dataset
uspto-grants-1988_07
Patent number
US04760165

Reaction notes

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