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:
Feb. 04, 2025
Filed:
Jul. 01, 2022
Lg Chem, Ltd., Seoul, KR;
Suk Yung Oh, Daejeon, KR;
Yong Heon Cho, Daejeon, KR;
Jung Su Han, Daejeon, KR;
Jun Seok Ko, Daejeon, KR;
Nam Young Yoon, Daejeon, KR;
Sung Hwan Kim, Deajeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Provided is a wastewater purification method, the method including: supplying a first mixed stream, in which an acid component and wastewater including water, a nitrile-based monomer, and ammonia are mixed, to a first column; recovering the nitrile-based monomer from an upper discharge stream from the first column; supplying a second mixed stream, in which a lower discharge stream from the first column and a base component are mixed, to a second column; and recovering the ammonia from an upper discharge stream from the second column and separating purified wastewater.