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:
Mar. 30, 1993
Filed:
Nov. 22, 1991
Maciej Kiedik, Kedzierzyn-Kozle, PL;
Jozef Kolt, Zabrze, PL;
Jerzy Marszycki, Kedzierzyn-Kozle, PL;
Eugeniusz Zajac, Kedzierzyn-Kozle, PL;
Teodor Bek, Kedzierzyn-Kozle, PL;
Zbigniew Swiderski, Kedzierzyn-Kozle, PL;
Anna Rzodeczko, Kedzierzyn-Kozle, PL;
Jerzy Mroz, Kedzierzyn-Kozle, PL;
Janina Olkowska, Kedzierzyn-Kozle, PL;
Instytut Ciezkiej Syntezy Organicznej 'Blachownia', Kedzierzyn-Kozle, PL;
Zaklady Chemiczne 'Blachownia', Kedzierzyn-Kozle, PL;
ABB Lummus Crest Inc., Bloomfield, NJ (US);
Abstract
The invention relates to a process for obtaining a high purity bisphenol from a post-reaction mixture resulting from the step of synthesis of phenol and acetone in the presence of a strong acid cation exhanger catalyst, by the way of crystallation and separation by distillation followed by recovery of bisphenol-A from the step of thermal catalytic decomposition of by product of the principal process technology in a multistage process.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile