Process for oxidizing impurities in crude terephthalic acid
Патенты
| Язык: |
Английский |
| Тип: |
Заявка на патент |
| Номер (11) |
WO 2014058943 A1 |
| Номер заявки (21): |
PCT/US2013/063972 |
| Дата подачи заявки (22): |
9 окт. 2013 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
|
| Дата публикации заявки (43): |
17 апр. 2014 г. |
| Авторы |
Bhattacharyya A.
,
Kuznetsova N.I.
,
Balʹzhinimaev B.S.
|
| Организации |
| 1 |
Honeywell UOP (formely UOP LLC)
|
|
A process for oxidizing solid crude terephthalic acid is described. The process includes contacting solid crude terephthalic acid with a solvent comprising a carboxylic acid and one or more of an ionic liquid or ammonium acetate; a bromine source; a catalyst; and an oxidizing agent to produce solid purified terephthalic acid at a temperature of 100 to 210°C, and a pressure of 2 to 4.5 MPa, for a time of 5 to 60 min, and recovering the solid purified terephthalic acid.