Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1996-10-15
1997-12-16
Krass, Frederick
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
521 33, 568196, 568718, 568721, 568722, 568723, 568727, 568728, C07C 3917
Patent
active
056986009
ABSTRACT:
The invention relates to the synthesis of bisphenols from monophenols and carbonyl compounds such as aldehydes and ketones with concentrated mineral acids such as hydrochloric acid and/or hydrogen chloride gas as acid catalysts and a mercaptan as cocatalyst, which is fixed by an ion-pair bond to a matrix insoluble in the reaction medium.
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Chemical Abstracts 58, 1403e.
Eitel Alfred
Fennhoff Gerhard
Wulff Claus
Bayer AG
Krass Frederick
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