| US 7,547,799 B1 | ||
| Method for producing phenolic compound | ||
| Hatem Abdallah Belfadhel, Roosendaal (Netherlands); Hans-Peter Brack, Herrliberg (Switzerland); Martin Walde, Mettmenstetten (Switzerland); and Dennis James Patrick Maria Willemse, Standdaarbuiten (Netherlands) | ||
| Assigned to Sabic Innovative Plastics IP B.V., Bergen op Zoom (Netherlands) | ||
| Filed on Jun. 20, 2008, as Appl. No. 12/143,379. | ||
| Int. Cl. C07C 69/88 (2006.01) | ||
| U.S. Cl. 560—71 | 16 Claims |
| 1. A method for producing an ester-substituted phenol product stream from an ester-substituted diaryl carbonate manufacturing
waste stream, the method comprising the steps of:
(1) obtaining a waste stream from an ester-substituted diaryl carbonate manufacturing facility, the waste stream comprising
an ester-substituted diaryl carbonate,
(2) creating a reaction mixture by combining the waste stream with a solvent selected from the group consisting of methanol,
ethanol, n-propanol, iso-propanol, and water, and with a transesterification catalyst,
(3) maintaining the reaction mixture at a reaction pressure at or below atmospheric pressure and at a reaction temperature
for a period of time sufficient to produce ester-substituted phenol by solvolysis of the ester-substituted diaryl carbonate,
and
(4) removing the ester-substituted phenol in an ester-substituted phenol stream, wherein the solvent, the reaction temperature, and the reaction time are selected in combination such that less than 1,000
ppm of acid-substituted phenol is present in the ester-substituted phenol stream.
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