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:
Aug. 09, 2022
Filed:
Aug. 17, 2018
Lg Chem, Ltd., Seoul, KR;
Min Suk Kang, Seoul, KR;
Sang Beom Lee, Seoul, KR;
Sung Ho Lee, Seoul, KR;
Joon Ho Shin, Seoul, KR;
Chul Han Park, Seoul, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
In a process of decomposing byproducts of a phenol production process using a reactive distillation column in which a reactor and a distillation column are integrated, since acetophenone is mixed with tar recovered to a lower part of the reactive distillation column and transferred, viscosity of the tar may be lowered so that the tar may be transferred at room temperature, and since the reactive distillation column may be operated at 0.5 to 3 bar, an operating temperature of the reactive distillation column is low as compared with a method of separating acetophenone by pressurization with high pressure, significantly reducing an operation cost of a heater required for a reaction. Also, since acetophenone is separately recovered at a position of 25 to 90% of a total number of stages in the reactive distillation column, recovery of an active ingredient may be enhanced.