Title:
IMPROVED PURIFICATION OF PHENYL ESTER SALTS
Document Type and Number:
WIPO Patent Application WO2001092216
Kind Code:
A3
Abstract:
The invention relates to a process for purifying and decolorizing a phenyl ester salt. The process combines a phenyl ester salt with a solvent to form a mixture and then stirs the mixture to form a slurry. The phenyl ester salt is substantially insoluble in this solvent. The process then collects the phenyl ester salt from the slurry. The collected phenyl ester salt may then be optionally dried or recrystallized. The collected phenyl ester salt is dissolved in a solvent to form a solution. The solution is decolorized and then spray dried to form a powder of the phenyl ester salt. As a result of the process the phenyl ester salt powder has a higher purity and an improved color as compared to the starting phenyl ester salt.
Inventors:
ARUMUGAM BHASKAR K
BYMASTER DIMMICK L
EAGAN ROBERT L
ECKART EDWARD J
FELTY JARVEY E
FONTENOT KEVIN J
GREEN JEFFREY W
KIRK SHANE K
LUTZ GARY P
SANDER TONY L
WILLIAMS THOMAS H
ZIMA GEORGE C
DUPONT JEFFREY SCOTT
DYKSTRA ROBERT RICHARD
BURNS MICHAEL EUGENE
BYMASTER DIMMICK L
EAGAN ROBERT L
ECKART EDWARD J
FELTY JARVEY E
FONTENOT KEVIN J
GREEN JEFFREY W
KIRK SHANE K
LUTZ GARY P
SANDER TONY L
WILLIAMS THOMAS H
ZIMA GEORGE C
DUPONT JEFFREY SCOTT
DYKSTRA ROBERT RICHARD
BURNS MICHAEL EUGENE
Application Number:
PCT/US2001/018116
Publication Date:
May 23, 2002
Filing Date:
June 04, 2001
Export Citation:
Assignee:
EASTMAN CHEM CO (US)
PROCTER & GAMBLE (US)
PROCTER & GAMBLE (US)
International Classes:
C07C69/353; C07C303/44; C07C309/42; (IPC1-7): C07C303/44; C07C309/42
Domestic Patent References:
| WO1999009004A2 | 1999-02-25 | |||
| WO1994028106A1 | 1994-12-08 |
Foreign References:
| US5466840A | 1995-11-14 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26)
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