EP 1045824 A1 20001025 - 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 20001025 (EN)

Application

EP 98965822 A 19981214

Priority

EP 9808134 W 19981214
US 6944197 P 19971215

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

C07C 51/265; C07C 63/26

IPC 8 full level

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

CPC (source: EP KR)

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

C-Set (source: EP)

Designated contracting state (EPC)

BE CH DE ES FR GB IT LI NL

DOCDB simple family (publication)

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 P0100656 A2 20010628; HU P0100656 A3 20020328; JP 2002508343 A 20020319; KR 20010033086 A 20010425; TR 200001718 T2 20010122

DOCDB simple family (application)

EP 9808134 W 19981214; AU 2161099 A 19981214; BR 9813606 A 19981214; CA 2315151 A 19981214; CN 98812192 A 19981214; EP 98965822 A 19981214; HU P0100656 A 19981214; JP 2000538970 A 19981214; KR 20007006448 A 20000613; TR 200001718 T 19981214