EP 2542522 A1 20130109 - PROCESS FOR THE PREPARATION 4,4'-DICHLORODIPHENYLSULPHONE
Title (en)
PROCESS FOR THE PREPARATION 4,4'-DICHLORODIPHENYLSULPHONE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON 4,4'-DICHLORDIPHENYLSULFON
Title (fr)
PROCÉDÉ POUR LA PRÉPARATION DE 4,4'-DICHLORODIPHENYLSULFONE
Publication
Application
Priority
- EP 10155591 A 20100305
- EP 2011053010 W 20110301
- EP 11708016 A 20110301
Abstract (en)
[origin: WO2011107465A1] The invention relates to a method for producing 4-chlorobenzene sulphonic acid from 2-chlorobenzene sulphonic acid and/or 3-chlorobenzene sulphonic acid, comprising the reaction of 2-chlorobenzene sulphonic acid and/or 3-chlorobenzene sulphonic acid to form 4-chlorobenzene sulphonic acid in the presence of sulphuric acid at a temperature of 100 to 300°C. The invention further relates to a method for producing 4,4'-dichlorodiphenylsulphone, comprising said method for producing 4-chlorobenzene sulphonic acid.
IPC 8 full level
C07C 303/02 (2006.01); C07C 303/22 (2006.01); C07C 315/00 (2006.01)
CPC (source: EP KR)
C07C 303/02 (2013.01 - EP KR); C07C 303/22 (2013.01 - EP KR); C07C 309/39 (2013.01 - KR); C07C 315/00 (2013.01 - EP KR); C07C 317/14 (2013.01 - KR)
Citation (search report)
See references of WO 2011107465A1
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
DOCDB simple family (publication)
WO 2011107465 A1 20110909; BR 112012021587 A2 20160913; CN 102791679 A 20121121; EP 2542522 A1 20130109; JP 2013521248 A 20130610; KR 20130043620 A 20130430
DOCDB simple family (application)
EP 2011053010 W 20110301; BR 112012021587 A 20110301; CN 201180012491 A 20110301; EP 11708016 A 20110301; JP 2012555397 A 20110301; KR 20127025928 A 20110301