Method for producing laurolactam, device for synthesizing same, laurolactam composition produced thereby, and method for producing polylaurolactam using same
AssigneeHanwha Solutions Corporation
InventorsJinho Park, Jiyeon Kim, Hyun Seo, Namjin Jang
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Abstract
Provided are a method of preparing laurolactam including: a) synthesizing laurolactam by Bechmann rearrangement of cyclododecanone oxime under a catalyst system, b) mixing the laurolactam synthesized in a) with a good solvent and removing the catalyst system, and c) mixing the laurolactam from which the catalyst system has been removed in b) with a poor solvent and performing recrystallization, a synthesis device thereof, a laurolactam composition prepared therefrom, and a method of preparing polylaurolactam using the laurolactam composition.
Claims7
A method of preparing laurolactam, the method comprising:
- a) synthesizing laurolactam by Beckmann rearrangement of cyclododecanone oxime under a catalyst system,
- b) mixing the laurolactam synthesized in a) with a good solvent and removing the catalyst system, and
- c) mixing the laurolactam from which the catalyst system has been removed in b) with a poor solvent and performing recrystallization,
- wherein in c), the laurolactam is recrystallized using a difference in solubility of laurolactam in the good solvent and the poor solvent,
- wherein the good solvent is a c1 to c4 hydrocarbon organic solvent containing one or two or more functional groups selected from the group consisting of a hydroxyl group, an amine group, and a mercapto group, and
- wherein the poor solvent is distilled water or deionized water.
Dependencies are inferred from the claim text.