公开(公告)号：US20220306563A1

公开(公告)日：2022-09-29

申请号：US17610761

申请日：2019-06-27

Applicant: RHODIA OPERATIONS

Inventor： Zhen YAN ,  Bright KUSEMA ,  Stéphane STREIFF

IPC: C07C51/235 ,  B01J23/644 ,  B01J23/42 ,  B01J21/18

Abstract: Provided is a method for preparing glycolic acid which comprises oxidizing glycolaldehyde with molecular oxygen in the presence of a solvent and a supported catalyst. Said supported catalyst comprises (i) a noble metal selected from the group consisting of Pt, Pd, Ru and Rh, (ii) Bi and (iii) a support. Advantageously, the supported metallic catalyst is more active than the catalysts used in prior art. Furthermore, the catalyst is more stable at oxygen rich conditions.

公开(公告)号：US20220213018A1

公开(公告)日：2022-07-07

申请号：US17612088

申请日：2019-06-04

Applicant: RHODIA OPERATIONS

Inventor： Zhen YAN ,  Bright KUSEMA ,  Sergio MASTROIANNI ,  Stéphane STREIFF ,  Philippe MARION

IPC: C07C51/27

Abstract: The present invention relates to a method of synthesizing at least one organic acid comprising oxidizing glycolaldehyde with nitric acid in the presence of a solvent. Advantageously, it is an industrially applicable process, which prepares organic acid, notably glycolic acid and/or glyoxylic acid in a high yield based on bio-based feedstocks.