The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2025
Filed:
Oct. 23, 2024
Tianjin University, Tianjin, CN;
Minhua Zhang, Tianjin, CN;
Yingzhe Yu, Tianjin, CN;
Hao Gong, Tianjin, CN;
He Dong, Tianjin, CN;
Feng Shi, Tianjin, CN;
Haoxi Jiang, Tianjin, CN;
TIANJIN UNIVERSITY, Tianjin, CN;
Abstract
The present disclosure relates to a bisphenol A preparation process and device thereof. Each stage of reaction system includes a cooler and reactors, each with four sections, the reactors are filled with bisphenol A synthetic resin catalysts before startup operation, and filling proportions of the catalysts are as follows: ⅓ of the catalysts for the first-section reactor, ⅔ for the second-section reactor, the full amount for the third-section reactor and the full amount for the fourth-section reactor. The three reactors operate in series connection through valves, the reactor with the deactivated catalyst is cut out and the reactor to be used is cut in to maintain the three reactors operating in series every time the system operates ⅓ of the service life of the catalyst, and the process can provide a larger air speed, which is beneficial to eliminating the influence of external diffusion, thereby obtaining higher product benefits.