Preparation of catalyst for bisphenols production

摘要

An improved method of preparing an ion exchange resin catalyst by partial neutralization of the ion exchange resin catalyst with a promoter. The promoter and a fluid are introduced into a vessel or a reactor which is partially filled with the ion exchange resin catalyst forming an ion exchange resin catalyst bed in the vessel or reactor. The fluid and the promoter are recirculated in an upflow direction at a velocity sufficient to partially fluidize the ion exchange resin catalyst bed and to achieve a rapid uniform distribution of the promoter throughout the catalyst bed.

主权项

1. A method of preparing an ion exchange resin catalyst comprising:
(a) partially filling a vessel, from 50 volume percent to 95 volume percent of said vessel, with an ion exchange resin catalyst to form an ion exchange resin catalyst bed in the vessel; (b) introducing a liquid into the vessel; (c) recirculating the liquid through the catalyst bed in an upflow direction; (d) introducing a promoter into the recirculating liquid; and (e) maintaining the recirculating liquid at a velocity in a range of from 0.5 meters (m)/hour (hr) to 100 m/hr sufficient to achieve at least 5 percent catalyst bed expansion and mobilize the ion exchange resin catalyst to evenly and rapidly distribute the promoter throughout the catalyst bed.