EP 3676246 A1 20200708 - SULFONIC ACID PREPARATION METHOD
Title (en)
SULFONIC ACID PREPARATION METHOD
Title (de)
VERFAHREN ZUR HERSTELLUNG VON SULFONSÄURE
Title (fr)
PROCEDE DE PREPARATION D'ACIDE SULFONIQUE
Publication
Application
Priority
- FR 1758099 A 20170901
- FR 2018052127 W 20180830
Abstract (en)
[origin: WO2019043339A1] The present invention relates to a method for preparing a sulfonic acid that is slightly corrosive, or even non-corrosive, with respect to stainless steels, said method comprising at least the steps of adding at least one nitrite to a sulfonic acid, curing under agitation with sparging of the mixture and recuperation of the low-corrosion sulfonic acid obtained. The invention also concerns the low-corrosion sulfonic acid obtained according to the method of the invention, as well as the use thereof as low-corrosion sulfonic acid.
IPC 8 full level
C07C 303/42 (2006.01); C07C 309/04 (2006.01); C23F 11/16 (2006.01)
CPC (source: EP KR US)
C07C 303/42 (2013.01 - EP KR US); C07C 309/04 (2013.01 - KR); C23F 11/04 (2013.01 - EP KR); C23F 11/181 (2013.01 - EP KR)
Citation (search report)
See references of WO 2019043339A1
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 2019043339 A1 20190307; BR 112020003347 A2 20200818; BR 112020003347 B1 20230117; CN 111051279 A 20200421; CN 111051279 B 20230512; EP 3676246 A1 20200708; FR 3070687 A1 20190308; FR 3070687 B1 20191122; KR 102373915 B1 20220311; KR 20200032195 A 20200325; MY 196844 A 20230504; PH 12020500326 A1 20201005; TW 201920088 A 20190601; TW I772505 B 20220801; US 11447450 B2 20220920; US 2020347014 A1 20201105
DOCDB simple family (application)
FR 2018052127 W 20180830; BR 112020003347 A 20180830; CN 201880056284 A 20180830; EP 18773238 A 20180830; FR 1758099 A 20170901; KR 20207005799 A 20180830; MY PI2020000992 A 20180830; PH 12020500326 A 20200213; TW 107130587 A 20180831; US 201816643083 A 20180830