公开(公告)号：US20240076450A1

公开(公告)日：2024-03-07

申请号：US18262214

申请日：2022-01-20

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Jeongseok PARK ,  Jinho PARK ,  Namjin JANG

IPC: C08G69/18 ,  C07D201/16 ,  C07D225/02

CPC classification number: C08G69/18 ,  C07D201/16 ,  C07D225/02

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.

公开(公告)号：US20240092712A1

公开(公告)日：2024-03-21

申请号：US18262586

申请日：2022-01-25

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Namjin JANG ,  Ji Hye CHOI ,  Jinho PARK

IPC: C07C25/02

CPC classification number: C07C25/02

Abstract: The present invention relates to a method for chlorinating an aromatic compound and, more specifically, to a method for chlorinating an aromatic compound to prevent the phenomenon of decreased responsiveness due to foam generation, and to prevent counterflow of a fluid.
By means of the method for chlorinating an aromatic compound according to the present invention, a plurality of column-type reactors are connected in series so that reaction products produced in a former reactor are inserted to a latter reactor, and chlorine gas is inserted in equal measure at the bottom of each reactor. Accordingly, a chlorination reaction occurs in each of the reactors, and hydrogen chloride gas generated in each of the reactors is exhausted from each of the reactors.

公开(公告)号：US20240033721A1

公开(公告)日：2024-02-01

申请号：US18256648

申请日：2021-12-10

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Youngjin KIM ,  Jinho PARK ,  Namjin JANG

IPC: B01J38/00

CPC classification number: B01J38/00

Abstract: The present invention relates to a method for recovering and reusing a selective homogeneous hydrogenation catalyst. The present invention relates to a method for recovering a selective homogeneous hydrogenation catalyst from a second reaction resolution in which a synthesis of cyclododecene is completed after synthesizing the cyclododecene by selective hydrogenation of a first reaction solution containing cyclododecatriene, triphenylphosphine, formaldehyde, and ruthenium chloride, and the method includes: preparing the selective homogeneous hydrogenation catalyst from the triphenylphosphine, the formaldehyde, and the ruthenium chloride during the selective hydrogenation of the first reaction solution, and synthesizing the cyclododecene; mixing a solvent containing cyclododecanone with the first reaction solution; and recovering the selective homogeneous hydrogenation catalyst through evaporation separation from the second reaction solution in which the synthesis of the cyclododecene is completed.

公开(公告)号：US20220064094A1

公开(公告)日：2022-03-03

申请号：US17298921

申请日：2019-09-16

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Jiyeon KIM ,  Jeongseok PARK ,  Jinho PARK ,  Kyuho SONG

IPC: C07C45/28

Abstract: The present invention relates to a method of preparing cyclododecanone. According to the present invention, a method of preparing cyclododecanone which allows implementation of a high conversion rate and minimization of production of unreacted materials and reaction by-products may be provided. In addition, the present invention implements a high conversion rate and a high selectivity even by a simplified process configuration, and thus may be usefully utilized in an economical method of preparing laurolactam, allowing commercially easy mass production.

公开(公告)号：US20230399273A1

公开(公告)日：2023-12-14

申请号：US18034140

申请日：2021-10-27

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Seonghoon HYEONG ,  Jinho PARK ,  Namjin JANG

IPC: C07C2/46 ,  C07C13/277

CPC classification number: C07C2/46 ,  C07C13/277

Abstract: The present invention provides a continuous preparation method of cyclododecatriene including: preparing a reaction composition by mixing butadiene, a main catalyst, and a co-catalyst with a toluene solvent; and allowing the reaction composition to react at a reaction pressure higher than a vapor pressure of the butadiene, and a cyclododecatriene composition prepared by the continuous preparation method.

公开(公告)号：US20240033654A1

公开(公告)日：2024-02-01

申请号：US18256940

申请日：2021-12-14

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Jinho PARK ,  Namjin Jang ,  Ji Hye CHOI

IPC: B01D3/38

CPC classification number: B01D3/38 ,  B01D2257/2045

Abstract: The present invention relates to a method for removing HCl in a chlorination reaction, and more particularly, to a method capable of efficiently removing HCl produced during a chlorination reaction of an aromatic compound. The present invention includes, in a chlorination reaction in which a final product with a chlorine-substituted terminal is produced in column reactors connected to each other in series, heating hydrogen chloride produced in the chlorination reaction in a stripping column connected to the reactor positioned at the rearmost end, to remove hydrogen chloride.

公开(公告)号：US20240124328A1

公开(公告)日：2024-04-18

申请号：US18264088

申请日：2022-01-26

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Ji Hye CHOI ,  Namjin JANG ,  Jinho PARK

IPC: C02F1/12 ,  C02F1/26

CPC classification number: C02F1/12 ,  C02F1/26 ,  C02F2101/30

Abstract: The present invention relates to a method for removing a low-boiling point organic compound and, more specifically, to a method for removing a low-boiling point organic compound, capable of suppressing a formation of a salt when the low-boiling point organic compound is removed from a brine solution produced in a process of preparing an aromatic compound.
Since the method for removing a low-boiling point organic compound according to the present invention suppresses salt precipitation when a low-boiling point organic compound in brine is removed, it is easy to maintain process facilities and the low-boiling point organic compound may be easily removed.

公开(公告)号：US20230020512A1

公开(公告)日：2023-01-19

申请号：US17782244

申请日：2020-10-27

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Jinho PARK ,  Jiyeon KIM ,  Hyun SEO ,  Namjin JANG

IPC: C07D201/04 ,  C07D225/02

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.

公开(公告)号：US20220024868A1

公开(公告)日：2022-01-27

申请号：US17311353

申请日：2019-12-18

Applicant: HANWHA SOLUTIONS CORPORATION

Inventor： Jiyeon KIM ,  Youngjin KIM ,  Jeongseok PARK ,  Jinho PARK ,  Hyun SEO ,  Seonghoon HYEONG ,  Kyuho SONG

IPC: C07D201/04

Abstract: The present invention relates to a laurolactam preparation method and synthesis apparatus, and epoxidation and a rearrangement reaction are performed in the conversion of cyclododecene into cyclododecanone so that the preparation method can synthesize laurolactam having a higher purity with a higher selectivity and in a higher yield than a conventional preparation method.