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. 06, 2026
Filed:
Jan. 20, 2022
Hanwha Solutions Corporation, Seoul, KR;
HANWHA SOLUTIONS CORPORATION, Seoul, KR;
Abstract
The present invention relates to a purification method for laurolactam, and more particularly, to a purification method capable of obtaining high-purity laurolactam substantially free of impurities. The present invention provides a purification method for laurolactam from a reaction product of a laurolactam synthesis process, the production method including: (S1) obtaining a first mixed solid by separating and removing low-boiling point materials through distillation of the reaction product; (S2) removing impurities suspended in a first mixed solution obtained by dissolving the first mixed solid in a good solvent; (S3) obtaining a second mixed solid precipitated by adding a poor solvent to the first mixed solution from which the impurities are removed; and (S4) evaporating a melt obtained by heating and melting the second mixed solid to obtain laurolactam in a gas phase and performing crystallization.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile