EP 2831040 A1 20150204 - PROCESS FOR RECOVERING AND RECYCLING AN ACID CATALYST
Title (en)
PROCESS FOR RECOVERING AND RECYCLING AN ACID CATALYST
Title (de)
VERFAHREN FÜR RÜCKGEWINNUNG UND RECYCLING EINES SÄUREKATALYSATORS
Title (fr)
PROCESSUS DE RÉCUPÉRATION ET DE RECYCLAGE D'UN CATALYSEUR ACIDE
Publication
Application
Priority
- US 201213431335 A 20120327
- US 2013033458 W 20130322
Abstract (en)
[origin: WO2013148497A1] Disclosed is a process for the extractive recovery of an acid catalyst from an aqueous mixture of glycolic acid with an extraction solvent comprising a tertiary amine or an onium carboxylate compound, a modifier, and a diluent. The acid catalyst, which can comprise strong acids such as sulfuric acid, alkyl sulfonic acids, and fluoroalkyl sulfonic acids, can be recovered by back extraction with aqueous formaldehyde and recycled to a process for the preparation of glycolic acid by the acid-catalyzed carbonylation of formaldehyde. Also disclosed is a process for the preparation of glycolic acid by the acid-catalyzed hydrocarboxylation of formaldehyde.
IPC 8 full level
C07C 303/44 (2006.01); C07C 51/48 (2006.01); C07C 315/06 (2006.01)
CPC (source: EP)
C07C 51/12 (2013.01); C07C 51/48 (2013.01); C07C 303/44 (2013.01); C07C 315/06 (2013.01); Y02P 20/584 (2015.11)
Citation (search report)
See references of WO 2013148497A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2013148497 A1 20131003; CN 104428284 A 20150318; EP 2831040 A1 20150204; JP 2015517992 A 20150625
DOCDB simple family (application)
US 2013033458 W 20130322; CN 201380016931 A 20130322; EP 13715533 A 20130322; JP 2015503413 A 20130322