Pretreatment process of resin catalyst for synthesizing bisphenol A

A pretreatment process of a resin catalyst for synthesizing bisphenol A, comprising the following steps:

• (a) removing residual liquid in the resin catalyst, specifically, purging the resin catalyst by using purge gas to remove the residual liquid in the resin catalyst and obtain a vented catalyst;
• (b) allowing the vented resin catalyst to be in contact with a replacement washing solution for static replacement, and removing the replacement washing solution;
• (c) allowing the obtained resin catalyst to be in contact with a replacement washing solution for static replacement;
• and
• (d) allowing a leachate to be in contact with the resin catalyst in a leaching manner, and removing the leachate, to obtain a pretreated resin catalyst;
• wherein
• the replacement washing solutions in step (c) and step (b) are both phenol aqueous solutions, and the phenol concentration of phenol aqueous solution in step (c) is higher than that of the phenol aqueous solution in the step (b).