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:
Oct. 18, 2022
Filed:
Oct. 25, 2017
Lg Chem, Ltd., Seoul, KR;
Hee Jun Eom, Daejeon, KR;
Dong Chul Lee, Daejeon, KR;
Yeon Yi Kim, Daejeon, KR;
Jung Ho Choi, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
The present invention relates to a method of purifying waste hydrochloric acid, and more particularly, to a method of purifying waste hydrochloric acid which includes preparing an extraction solution by dissolving an extractant in an organic solvent (S), extracting metallic components with the organic solvent by adding the extraction solution to the waste hydrochloric acid (S), separating a waste hydrochloric acid layer and the organic solvent containing the metallic components (S), and obtaining purified hydrochloric acid by recovering the separated (fractionated) waste hydrochloric acid layer (S), wherein the extractant is used in an amount of 40 moles or more based on 1 mole of iron (Fe) included in the waste hydrochloric acid, and the waste hydrochloric acid and the extraction solution are mixed in a volume ratio of 1:0.1 to 1:1.