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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.
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公开(公告)号：US20200181054A1
公开(公告)日：2020-06-11
申请号：US16316644
申请日：2017-07-12
Applicant: SABIC Global Technologies B.V.
Inventor： Syed Azhar Hashmi , Salkod Parameshwar Mallika , Flaiyh Al-Anazi
Abstract: A method for purifying acetone includes contacting an initial solution with a basic ion-exchange resin at a temperature of 15° C. to 30° C., wherein the initial solution comprises acetone and acetone impurities; and removing the acetone impurities from the initial solution with the basic ion-exchange resin to produce a purified solution.
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公开(公告)号：US10315978B2
公开(公告)日：2019-06-11
申请号：US15775874
申请日：2016-11-14
Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
Inventor： Nedumbamana Sankaran , Syed Azhar Hashmi , Vinodkumar Vasudevan
IPC: C07C51/487 , C07C1/12
Abstract: A method of reducing the formation of an impurity in a terephthalic acid (TPA) production process includes: combining in a reactor, a catalyst, a mixture comprising the impurity and the TPA, and a compound comprising an active carbon atom; reacting the impurity with the compound in the presence of the catalyst by a condensation-dehydration reaction process comprising a nucleophilic addition of the active carbon atom of the compound to a carbonyl group of the impurity to form an intermediate followed by a dehydration reaction of the intermediate to form a product mixture comprising a water, the TPA, and an alkene; and recovering the product mixture from the reactor.
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公开(公告)号：US20180305287A1
公开(公告)日：2018-10-25
申请号：US15770227
申请日：2016-10-17
Applicant: SABIC Global Technologies B.V.
Inventor： Syed Azhar Hashmi , Labeeb A. Chaudhary , Nedumbamana Sankaran
IPC: C07C51/265 , B01J31/04 , B01J23/50 , B01J27/08
CPC classification number: C07C51/265 , B01J23/50 , B01J27/08 , B01J31/04 , C07C2601/16 , C07C63/26
Abstract: A process for producing terephthalic acid, comprising: passing a feed stream through a catalytic reactor wherein the feed stream comprises p-xylene; contacting the feed stream with a catalyst within the catalytic reactor to produce an oxidation reaction wherein the catalyst comprises, less than or equal to 10% of a metal component wherein the metal component comprises cobalt ions, manganese ions, or a combination comprising at least one of the foregoing, less than or equal to 15% bromide ions, and less than or equal to 2% silver ions; and producing a product stream comprising terephthalic acid, wherein the product stream exits the catalytic reactor.
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公开(公告)号：US20180118653A1
公开(公告)日：2018-05-03
申请号：US15562234
申请日：2016-03-18
Applicant: SABIC Global Technologies B.V.
Inventor： Vinodkumar Vasudevan , Guillermo Leal , Nedumbamana Sankaran , Syed Azhar Hashmi
IPC: C07C51/487 , C07C51/43 , C07C51/265
CPC classification number: C07C51/487 , C07C51/265 , C07C51/43 , C07C63/26
Abstract: A method of removing an aromatic carboxy-aldehyde from an aromatic acid or the corresponding anhydride includes reacting a hydroxylamine-containing compound with the aromatic carboxy-aldehyde to form a reaction mixture including the corresponding nitrone. A phthalic acid or corresponding anhydride prepared according to the method is also described herein. A method for the manufacture of a phenyl dicarboxylic acid includes oxidizing a xylene to provide a stream including the phenyl dicarboxylic acid and the corresponding carboxybenzaldehyde and toluic acid contaminants, reacting a hydroxylamine-containing compound with the carboxybenzaldehyde in the stream to form a reaction mixture including the corresponding nitrone, wherein the nitrone is water soluble, and crystallizing the phenyl dicarboxylic acid or the corresponding anhydride from water to provide the purified phenyl dicarboxylic acid or the corresponding anhydride. A phenyl dicarboxylic acid prepared according to the above method represents another embodiment.
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Patent Agency Ranking
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.
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公开(公告)号：US10737994B2
公开(公告)日：2020-08-11
申请号：US16316644
申请日：2017-07-12
Applicant: SABIC Global Technologies B.V.
Inventor： Syed Azhar Hashmi , Salkod Parameshwar Mallika , Flaiyh Al-Anazi
Abstract: A method for purifying acetone includes contacting an initial solution with a basic ion-exchange resin at a temperature of 15° C. to 30° C., wherein the initial solution comprises acetone and acetone impurities; and removing the acetone impurities from the initial solution with the basic ion-exchange resin to produce a purified solution.
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公开(公告)号：US11180439B2
公开(公告)日：2021-11-23
申请号：US16633935
申请日：2018-08-09
Applicant: SABIC Global Technologies, B.V.
IPC: C07C51/48 , B01J38/64 , C07C51/487 , C07C51/64 , C07C63/26
Abstract: A method of reducing impurities in a catalyst for the production of purified terephthalic acid includes forming purified terephthalic acid by hydrogenating crude terephthalic acid with a catalyst in a reactor; separating the purified terephthalic acid from the catalyst and reactivating the catalyst by washing with a caustic solution; and flushing the catalyst contaminated with impurities with a non-caustic liquid at a flushing temperature of greater than or equal to 50° C.
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公开(公告)号：US20210087132A1
公开(公告)日：2021-03-25
申请号：US16633935
申请日：2018-08-09
Applicant: SABIC Global Technologies, B.V.
IPC: C07C51/48 , C07C51/487 , B01J38/64
Abstract: A method of reducing impurities in a catalyst for the production of purified terephthalic acid includes forming purified terephthalic acid by hydrogenating crude terephthalic acid with a catalyst in a reactor; separating the purified terephthalic acid from the catalyst and reactivating the catalyst by washing with a caustic solution; and flushing the catalyst contaminated with impurities with a non-caustic liquid at a flushing temperature of greater than or equal to 50° C.
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公开(公告)号：US10676420B2
公开(公告)日：2020-06-09
申请号：US15770227
申请日：2016-10-17
Applicant: SABIC Global Technologies B.V.
Inventor： Syed Azhar Hashmi , Labeeb A. Chaudhary , Nedumbamana Sankaran
IPC: C07C51/265 , B01J23/50 , B01J27/08 , B01J31/04
Abstract: A process for producing terephthalic acid, comprising: passing a feed stream through a catalytic reactor wherein the feed stream comprises p-xylene; contacting the feed stream with a catalyst within the catalytic reactor to produce an oxidation reaction wherein the catalyst comprises, less than or equal to 10% of a metal component wherein the metal component comprises cobalt ions, manganese ions, or a combination comprising at least one of the foregoing, less than or equal to 15% bromide ions, and less than or equal to 2% silver ions; and producing a product stream comprising terephthalic acid, wherein the product stream exits the catalytic reactor.
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