公开(公告)号：US20230094935A1

公开(公告)日：2023-03-30

申请号：US17802865

申请日：2021-02-24

Applicant: SABIC Global Technologies B.V.

Inventor： Syed Azhar Hashmi ,  Prasanna Kumar Pathath ,  Suman Kumar Jana ,  Vadlamani Chaitanya ,  Naveen Sathu ,  Lee Sangjoo ,  Debasish Das ,  Selvakumar Subramanian

IPC: C07C51/265 ,  B01J27/128 ,  B01J35/12

Abstract: Disclosed is a process for producing terephthalic acid. The process includes contacting p-xylene with a gaseous stream containing oxygen (O2) in presence of a homogeneous catalyst solution, at a reaction temperature of 180° C. to 195° C. to oxidize at least a portion of the p-xylene and form a product stream containing terephthalic acid, said homogeneous catalyst solution contains 350 ppm to 450 ppm cobalt (Co), 170 ppm to 270 ppm manganese (Mn), and 410 ppm to 510 ppm bromine (Br), wherein a Br/(Co+Mn) wt. % ratio is 0.5:1 to 1:1, and a Co to Mn wt. % ratio is 1.5:1 to 2:1.