EP 0848693 A1 19980624 - ISOMERIZATION OF BISPHENOLS
Title (en)
ISOMERIZATION OF BISPHENOLS
Title (de)
ISOMERISIERUNG VON BISPHENOLEN
Title (fr)
SOMERISATION DE BISPHENOLS
Publication
Application
Priority
- US 9613683 W 19960823
- US 275695 P 19950824
Abstract (en)
[origin: WO9708122A1] A catalyst useful for the condensation of an aldehyde or ketone starting material with a phenol was an insoluble mercaptosulfonic acid compound. The heterogeneous catalysts comprise catalytically-active species represented by formula (II). L was an optional linking group and - was a bond, which catalytically-active species was attached by the bond - to an insoluble organic or inorganic support; or a catalytically-active species represented by formula (III), wherein L' was an optional linking group, - was a bond and theta ' and theta " were residues of theta , and a and b were independently selected from integers equal to or greater than 1. These catalysts isomerize o,p-bisphenols to p,p-bisphenols.
IPC 1-7
IPC 8 full level
C07C 37/20 (2006.01)
CPC (source: EP)
B01J 31/0217 (2013.01); B01J 31/0225 (2013.01); B01J 31/06 (2013.01); C07C 37/00 (2013.01); C07C 37/20 (2013.01); C07C 2603/18 (2017.04)
C-Set (source: EP)
Designated contracting state (EPC)
BE DE GB NL
DOCDB simple family (publication)
WO 9708122 A1 19970306; CA 2230272 A1 19970306; CN 1200105 A 19981125; CZ 55698 A3 19980812; EP 0848693 A1 19980624; EP 0848693 A4 19990317; ZA 967195 B 19980223
DOCDB simple family (application)
US 9613683 W 19960823; CA 2230272 A 19960823; CN 96197659 A 19960823; CZ 55698 A 19960823; EP 96930593 A 19960823; ZA 967195 A 19960823