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:
Apr. 14, 1992
Filed:
Nov. 15, 1990
Joseph B Powell, Houston, TX (US);
Christopher W Uzelmeier, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
The present disclosure is directed to improving purity of a bisphenol product in a bisphenol by-product isomerization process wherein isomers of bisphenol are isomerized to the desired bisphenol product. During the isomerization, acidic resin fines elute from the acidic ion exchange resin catalyst into the reaction effluent. These resin fines can be filtered effectively and without contamination by a bed of solid particles such as alumina or carbon. The removal of resin fines improves the product quality and yield by eliminating resin particulates and reducing acid catalyzed cracking of bisphenols during purification and finishing steps.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile