公开(公告)号：US20180142362A1

公开(公告)日：2018-05-24

申请号：US15575783

申请日：2016-05-20

Applicant: Avantium Knowledge Centre B.V. ,  Synvina C.V.

Inventor： Klaas Jan Pieter Schouten ,  Jan Cornelis Van Der Waal ,  Maria Varini ,  Gerardus Johannes Maria Gruter

IPC: C25B3/02 ,  C25B11/12 ,  C25B11/04

Abstract: An aromatic dicarboxylic acid of chemical formula HOOC—Ar1—COOH is prepared in a process wherein a feedstock comprising at least an aromatic aldehyde compound of chemical formula (1): OHC—Ar1—COOH, wherein Ar1 represents an arylene or heteroarylene moiety, and an aqueous electrolyte are provided; the feedstock and the aqueous electrolyte are introduced into an electrolytic cell comprising electrodes, wherein at least one of the electrodes comprises a non-noble metal and/or an oxide and/or a hydroxide thereof and/or carbon; and the aromatic aldehyde compound of formula (1) is oxidized electrochemically to yield the aromatic dicarboxylic acid.

公开(公告)号：US10787748B2

公开(公告)日：2020-09-29

申请号：US15575783

申请日：2016-05-20

Applicant: Avantium Knowledge Centre B.V. ,  Synvina C.V.

Inventor： Klaas Jan Pieter Schouten ,  Jan Cornelis Van Der Waal ,  Maria Varini ,  Gerardus Johannes Maria Gruter

IPC: C25B3/02 ,  C07D307/68 ,  C07C51/43 ,  C25B11/04 ,  C25B11/12

Abstract: An aromatic dicarboxylic acid of chemical formula HOOC—Ar1—COOH is prepared in a process wherein a feedstock comprising at least an aromatic aldehyde compound of chemical formula (1): OHC—Ar1—COOH, wherein Ar1 represents an arylene or heteroarylene moiety, and an aqueous electrolyte are provided; the feedstock and the aqueous electrolyte are introduced into an electrolytic cell comprising electrodes, wherein at least one of the electrodes comprises a non-noble metal and/or an oxide and/or a hydroxide thereof and/or carbon; and the aromatic aldehyde compound of formula (1) is oxidized electrochemically to yield the aromatic dicarboxylic acid.

公开(公告)号：US10435799B2

公开(公告)日：2019-10-08

申请号：US15575789

申请日：2016-05-20

Applicant: Avantium Knowledge Centre B.V.

Inventor： Klaas Jan Pieter Schouten ,  Jan Cornelis Van Der Waal ,  Maria Varini ,  Gerardus Johannes Maria Gruter

IPC: C25B3/00 ,  C25B3/02 ,  C07B63/02 ,  C07D307/68 ,  C07C51/487 ,  C25B11/12

Abstract: A carboxylic acid-containing composition, which composition contains an aldehyde, is purified in a process, which process comprises introducing the carboxylic acid-containing composition and an aqueous electrolyte into an electrolytic cell comprising electrodes; electrochemically oxidizing the aldehyde in the electrolytic cell to obtain an electrochemically oxidized product composition comprising a carboxylic acid derived from the aldehyde; and, optionally, separating carboxylic acid from the electrochemically oxidized product composition.