Method and catalyst for making bisphenol
AssigneeGeneral Electric Company
InventorGary R. Faler
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Abstract
A sulfonated aromatic organic polymer, such as sulfonated polystyrene ion-exchange resin, is provided having N-alkylaminoorgano mercaptan groups attached to backbone sulfonyl radicals by covalent nitrogen-sulfur linkages. The ion-exchange resin can be used to effect phenol-ketone condensation in the synthesis of bisphenols.
Claims8
An ion-exchange resin comprising a sulfonated aromatic organic polymer having chemically combined sulfonated aromatic organic units with N-alkylaminoorganomercaptan groups attached to the sulfonyl radicals by covalent nitrogen-sulfur linkages.
An ion-exchange resin comprising a blend of sulfonated aromatic organic polymer having chemically combined sulfonated aromatic organic units with N-alkylaminoorganomercaptan group attached to sulfonyl radicals by covalent nitrogen-sulfur linkages, and sulfonated aromatic organic polymer free of sulfonyl radicals having N-alkylaminoorganomercaptan groups attached thereto.
A method for making bisphenol which comprises reacting a ketone and a phenol in the presence of an effective amount of a cation-exchange resin having from about 5-40 mole percent of chemically combined aromatic sulfonyl units with an N-alkyl aminoorganomercapto radical of the formula, ##STR12## covalently bonded to sulfur by nitrogen-sulfur linkages, where R is a divalent C.sub.(1-13) organo radical, R.sup.1 is a C.sub.(1-8) monovalent alkyl radical and Y is a member selected from hydrogen, carboxy and nitrile.
Dependencies are inferred from the claim text.