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:
Sep. 08, 2020
Filed:
Oct. 11, 2016
Lg Chem, Ltd., Seoul, KR;
Sung-Kyun Kim, Daejeon, KR;
Sung-Kyu Lee, Daejeon, KR;
Yeon-Uk Choo, Daejeon, KR;
Joon-Ho Shin, Daejeon, KR;
Ha-Na Lee, Daejeon, KR;
Tae-Woo Kim, Daejeon, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
Disclosed is a method for purifying phenol, by which the loss of a heat source is minimized, the amount used of steam is decreased, and efficiency of energy consumed in a process may be maximized. The method for purifying phenol includes a step of passing impurities including phenol, acetone and hydrocarbon, which are prepared using cumene as a raw material, via a plurality of distillation columns one by one, and performing azeotropic distillation, wherein the ratio of phenol and water at the uppermost end of the distillation column where the azeotropic distillation is performed, is from 60:40 to 65:35, for the optimized separation of the hydrocarbon.