Back to results
US 7,923,586 B2Granted
Method for stabilizing a cation exchange resin prior to use as an acid catalyst and use of said stabilized cation exchange resin in a chemical process
AssigneeDow Global Technologies LLC
InventorsJames Richard Stahlbush, Harlan Robert Goltz, Thomas Caldwell Young, Edward Alan Fraini
Life of this patent
Estimating the term…
Abstract
A method for preventing the degradation of a catalyst during storage of the catalyst and prior to using the catalyst in a chemical process comprising treating the catalyst with an antioxidant and storing the treated catalyst until further use. The stabilized treated catalyst may be used in a process for producing organic chemicals such as in a process for producing bisphenol A.
Claims16
A process for producing bisphenol A using a cation-exchange resin catalyst comprising:
- (a) providing a cation-exchange resin catalyst for catalyzing the condensation of phenol with acetone;
- (b) treating the cation-exchange resin catalyst with an antioxidant for preventing the degradation of the treated cation-exchange resin catalyst during storage, handling, processing and/or drying of the treated cation-exchange resin catalyst prior to using the treated cation-exchange resin catalyst in the process;
- and
- (c) condensing phenol and acetone in a reaction zone at a temperature range of from 20° C. to 200° C., in the presence of the treated cation-exchange resin catalyst.
1 more element
Dependencies are inferred from the claim text.