Solid terephthalic acid composition
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
US 8835678 B2 |
| Request number: |
13/155,568 |
| Request date: |
Jun 8, 2011 |
| patent.field.start_date: |
|
| Registration date: |
Sep 16, 2014 |
| patent.field.request_publication_date: |
|
| Authors |
Bhattacharyya A.
,
Kocal J.A.
,
Walenga J.T.
,
Adonin N.Y.
,
Kuznetsova N.I.
,
Balʹzhinimaev B.S.
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
Honeywell UOP (formely UOP LLC)
|
|
A solid terephthalic acid composition and a process for producing terephthalic acid from para-xylene. The process comprises forming a mixture comprising the para-xylene, a solvent, a bromine source, and a catalyst; and oxidizing the para-xylene by contacting the mixture with an oxidizing agent at oxidizing conditions to produce a solid oxidation product comprising terephthalic acid, para-toluic acid, 4-carboxybenzaldehyde. The solvent comprises a carboxylic acid having from 1 to 7 carbon atoms and an dialkyl imidazolium ionic liquid; and the catalyst comprises at least one of cobalt, titanium, manganese, chromium, copper, nickel, vanadium, iron, molybdenum, tin, cerium, and zirconium. The solid terephthalic acid composition comprises, less than about 4,000 ppm-wt 4-carboxybenzaldehyde content, and more than about 2,000 ppm-wt a para-toluic acid.