Preparation of bisphenols
AssigneeShell Oil Company
InventorsArien Kwantes, Arie Van Dongen, Hendrik A. C. Groeneveld
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Abstract
An improved continuous process for preparing bisphenols from phenols and carbonyl compounds in the presence of an acidic ion-exchange resin is described wherein the reaction zone comprises at least two reactors in series and a part the effluent from at least one reactor, with the exception of the last reactor, is recycled.
Claims8
A continuous process for the preparation of 2,2-bis(4-hydroxyphenyl)propane comprising reacting at a temperature from about 30.degree. C. to about 120.degree. C., at least two moles of phenol with acetone in the presence of an acidic ion-exchange resin having an exchange capacity of at least 2.0 meq H.sup.+ /g of dry resin, in a reaction zone comprising at least two reactors in series and recovering the 2,2-bis(4-hydroxyphenyl)propane from the effluent from the last reactor, wherein a part of the effluent from at least one reactor, with the exception of the last reactor, is recycled.
Dependencies are inferred from the claim text.