Phenol → Diphenyl carbonate
Reaction equation
[C:1](=[O:11])([O:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)[O:2][CH3:3].[C:12]1(O)[CH:17]=[CH:16]C=[CH:14][CH:13]=1>>[C:1](=[O:11])([O:2][C:3]1[CH:16]=[CH:17][CH:12]=[CH:13][CH:14]=1)[O:4][C:5]1[CH:6]=[CH:7][CH:8]=[CH:9][CH:10]=1Participants
Procedure
In the column apparatus described in Example 15, under the conditions described there, was reacted a mixture of 50 g/h of methyl phenyl carbonate, 200 g/h of phenol and 3.25 g/h of octylstannonic acid. After establishment of constant conditions, at the head of the apparatus, 210 g/h of a mixture of 1.0% by weight of methanol, 5.4% by weight of dimethyl carbonate and 93.6% by weight of phenol were continuously withdrawal and, at the foot of the column, 48 g/h of a mixture of 9.4% by weight of phenol, 1.9% by weight of methyl phenyl carbonate and 88.7% by weight of diphenyl carbonate were continuously withdrawn. This represented a space-time yield for the formation of diphenyl carbonate of 0.048 g·ml-1· h-1, based on the reactor volume. 20.5% of the methyl phenyl carbonate used reacted with phenol, transesterifying to form diphenyl carbonate. The selectivity of the formation of diphenyl carbonate was >99.9%, that is no by-products could be detected.
Sources & evidence
- ORD record
- ord-d749d2c44d064148a31bb1fea244dc47
- Source dataset
- uspto-grants-1994_09
- Patent number
- US05344954
Reaction notes
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