Pretreatment process of resin catalyst for synthesizing bisphenol a
A continuous pretreatment process for resin catalysts in bisphenol A synthesis uses purging, venting, and washing with gradient phenol concentrations to quickly reduce moisture content, enhancing catalytic efficiency and stability.
JP2025165363AActive Publication Date: 2025-11-04TIANJIN UNIV
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Patent Information
- Application Number
- JP2024214582
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-04-22
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2044-12-09
AI Technical Summary
Technical Problem
Current methods for pretreating resin catalysts for bisphenol A synthesis are lengthy, require large amounts of phenol, and struggle to effectively control moisture content below 1.0% by weight, affecting catalytic performance and stability.
Method used
A continuous pretreatment method involving purging, venting, static replacement, and washing with phenol solutions of varying concentrations to sequentially remove bound and unbound water from the resin catalyst.
Benefits of technology
The method rapidly reduces resin catalyst moisture content to less than 1.0% by weight, shortens pretreatment time, and reduces phenol consumption, ensuring efficient catalytic performance.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a pretreatment process for a resin catalyst for synthesizing bisphenol A.SOLUTION: The pretreatment process comprises the following steps: first, purging the resin catalyst with gas to empty residual liquid in the resin catalyst; next, allowing the vented resin catalyst to be in contact with a replacement washing solution for static replacement, and emptying the replacement washing solution; then, allowing the obtained resin catalyst to be in contact with the replacement washing solution for static replacement; and finally, allowing a leachate to be in contact with the resin catalyst and emptying the leachate, to obtain a pretreated resin catalyst. This effectively removes water in a resin catalyst for bisphenol A synthesis, the water content in the resin catalyst being less than 1.0 wt.%, reduces the amount of phenol used as the washing solution, reduces material consumption and energy consumption, and also reduces the cost of the pretreatment process.SELECTED DRAWING: Figure 1
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