公开(公告)号：US20180346350A1

公开(公告)日：2018-12-06

申请号：US15774612

申请日：2016-11-08

Applicant: SABIC Global Technologies B.V.

Inventor： Roy Van Lier ,  Syed Azhar Hashmi ,  Vadlamani Prasad Rao Chaitanya ,  Sandeep P. Mohandas ,  Muhammad Mosleh Al-Subhi ,  Lee Sangjoo ,  Hasan Mohammed Rashad Haneef

IPC: C02F1/42 ,  C02F1/66 ,  B01J41/04 ,  B01J41/12 ,  B01J47/02 ,  B01J49/57 ,  C07C51/42

CPC classification number: C02F1/42 ,  B01J41/05 ,  B01J41/07 ,  B01J47/02 ,  B01J47/04 ,  B01J49/07 ,  B01J49/57 ,  C02F1/66 ,  C02F2001/422 ,  C02F2103/36 ,  C02F2103/38

Abstract: A method for recovering water from purified terephthalic acid production wastewater includes: producing purified terephthalic acid comprising purified terephthalic acid feedstock and wastewater comprising impurities; separating the purified terephthalic acid feedstock from the wastewater comprising impurities; transferring the wastewater to a tank; adjusting the p H of the wastewater with a basic solution; adjusting the temperature of the wastewater; passing the wastewater to a column; contacting the wastewater with an ion exchange resin to remove the impurities; and recovering the water depleted of impurities.

公开(公告)号：US10919787B2

公开(公告)日：2021-02-16

申请号：US15774612

申请日：2016-11-08

Applicant: SABIC Global Technologies B.V.

Inventor： Roy Van Lier ,  Syed Azhar Hashmi ,  Vadlamani Prasad Rao Chaitanya ,  Sandeep P. Mohandas ,  Muhammad Mosleh Al-Subhi ,  Lee Sangjoo ,  Hasan Mohammed Rashad Haneef

IPC: C02F1/42 ,  C02F1/66 ,  B01J47/02 ,  B01J49/57 ,  B01J49/07 ,  B01J41/05 ,  B01J47/04 ,  B01J41/04 ,  C07C51/42 ,  B01J41/07 ,  B01J41/12 ,  C02F103/36 ,  C02F103/38 ,  C02F101/32

Abstract: A method for recovering water from purified terephthalic acid production wastewater includes: producing purified terephthalic acid comprising purified terephthalic acid feedstock and wastewater comprising impurities; separating the purified terephthalic acid feedstock from the wastewater comprising impurities; transferring the wastewater to a tank; adjusting the p H of the wastewater with a basic solution; adjusting the temperature of the wastewater; passing the wastewater to a column; contacting the wastewater with an ion exchange resin to remove the impurities; and recovering the water depleted of impurities.

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.