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1. (WO2018158672) ENERGY AND ENVIRONMENTALLY INTEGRATED METHOD FOR PRODUCTION OF AROMATIC DICARBOXYLIC ACIDS BY OXIDATION

Pub. No.:    WO/2018/158672    International Application No.:    PCT/IB2018/051195
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Tue Feb 27 00:59:59 CET 2018
IPC: C07C 51/265
Applicants: GRUPO PETROTEMEX, S.A. DE C.V.
Inventors: QUINTERO BARAJAS, José Gabriel
RAMÍREZ SOSA, Pamela Shantal
ESCOBAR LÓPEZ, Alfredo
MEDINA VALENCIA, Verona
BULBARELA CRODA, Arturo
MORÁN DELGADO, Bertha
Title: ENERGY AND ENVIRONMENTALLY INTEGRATED METHOD FOR PRODUCTION OF AROMATIC DICARBOXYLIC ACIDS BY OXIDATION
Abstract:
A continuous process for oxidizing a di-alkyl substituted aromatic compound with compressed air in a primary bubble column reactor; including removing a portion of the three phase reaction medium to a post–oxidation bubble column unit supplied with compressed air; separating the post oxidation reaction medium to an overhead gas and an underflow slurry; collecting overhead gases from the oxidation reactors and the de-gassing unit and conducting the combined overhead gases to a water removal column (WRC); transferring the underflow slurry from the de-gassing unit to a digestion unit to effect further oxidation without addition of air to the digestion unit; removing overhead gases to the water removal column; crystallizing the final oxidation slurry; and filtering the slurry on a rotary pressure filter; wherein a portion of the energy of the off gas from the WRC is employed to drive an air compressor to supply the compressed air for oxidation.