Global Patent Index - EP 1045824 A1

EP 1045824 A1 2000-10-25 - METHOD TO PRODUCE AROMATIC CARBOXYLIC ACIDS

Title (en)

METHOD TO PRODUCE AROMATIC CARBOXYLIC ACIDS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON AROMATISCHEN CARBONSÄUREN

Title (fr)

PROCEDE DE PRODUCTION D'ACIDES CARBOXYLIQUES AROMATIQUES

Publication

EP 1045824 A1 (EN)

Application

EP 98965822 A

Priority

  • EP 9808134 W
  • US 6944197 P

Abstract (en)

[origin: WO9931038A1] A process to produce for example terephthalic acid is provided, the process including the steps of: providing a feed stream comprising a dialkyl substituted aromatic and an organic acid solvent: contacting the feed stream with a vapour stream, the vapour stream containing at least 50 % by volume oxygen and at an oxygen partial pressure of at least 1 psi, at a temperature between about 80 DEG C and about 130 DEG C, in the presence of a catalyst system comprising zirconium and cobalt, wherein the contacting is done in a stirred tank reactor; removing from the stirred tank reactor a vapour stream comprising the organic acid and water: condensing at least a portion of the organic acid and water from the vapour stream; separating at least a portion of the water from the organic acid separated from the vapour stream; returning at least a portion of the condensed organic acid back to the stirred tank reactor; continuously recovering from the stirred tank reactor a reactor product comprising a diacid substituted aromatic; isolating solid crystals of diacid substituted aromatic from the reactor product; and recovering from the solid crystals of diacid substituted aromatic a diacid substituted aromatic having a purity of at least 97 % by weight.

IPC 1-7 (main, further and additional classification)

C07C 51/265; C07C 63/26

IPC 8 full level (invention and additional information)

C07B 61/00 (2006.01); C07C 51/265 (2006.01); C07C 63/26 (2006.01)

CPC (invention and additional information)

C07C 51/265 (2013.01); Y02P 20/582 (2015.11)

Combination set (CPC)

  1. C07C 51/265 + C07C 63/24
  2. C07C 51/265 + C07C 63/26

Citation (search report)

See references of WO 9931038A1

Designated contracting state (EPC)

BE CH DE ES FR GB IT LI NL

EPO simple patent family

WO 9931038 A1 19990624; AU 2161099 A 19990705; AU 732522 B2 20010426; BR 9813606 A 20001010; CA 2315151 A1 19990624; CN 1282314 A 20010131; EP 1045824 A1 20001025; HU 0100656 A2 20010628; HU 0100656 A3 20020328; JP 2002508343 A 20020319; TR 200001718 T2 20010122

INPADOC legal status


2002-11-06 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020424

2002-01-30 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20011213

2000-10-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000518

2000-10-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE CH DE ES FR GB IT LI NL