公开(公告)号：US20220233992A1

公开(公告)日：2022-07-28

申请号：US17616523

申请日：2020-06-22

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Hyo Soo LEE ,  Hai Joong LEE ,  Hyung Won SHIN ,  Hye Jin LEE

IPC: B01D49/00 ,  C02F1/36

Abstract: According to an embodiment of the present invention, in order to perform fine particle agglomeration by outputting a low frequency sound wave and then remove fine particles, there is provided a method for fine particle agglomeration, the method including: an initial fine particle measuring step of generating fine particle measurement data including a pollution level of fine particles in a purification region and outputting the data to a sound source converting unit, by a fine particle measuring unit; a low frequency and sound pressure data extracting step of extracting a low frequency and sound pressure of a low frequency sound source stored in a storage to be used for agglomeration of fine particles, based on the fine particle measurement data, by the sound source converting unit; a sound source converting step of converting an output sound source into the low frequency sound source such that the low frequency sound source has the extracted low frequency and sound pressure data, by the sound source converting unit; and a fine particle agglomeration performing step of causing fine particles to agglomerate by receiving the low frequency sound source and outputting the low frequency sound source as a low frequency sound wave for agglomeration of fine particles, by a low frequency sound wave generating unit.

公开(公告)号：US20240002328A1

公开(公告)日：2024-01-04

申请号：US18255829

申请日：2021-07-08

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Yong Jin KIM ,  Jayeon BAEK ,  Hye Jin LEE

IPC: C07C67/40 ,  B01J31/02 ,  B01J27/057

CPC classification number: C07C67/40 ,  B01J31/0244 ,  B01J27/0573

Abstract: The present invention relates to a catalyst system for preparing a carbonate derivative, comprising selenium (Se) and a pyridine amine compound represented by structural formula 1. The catalyst system for preparing a carbonate derivative, and a method for preparing a carbonate derivative by using same, of the present invention, allow an alcohol to undergo oxidative carbonylation by using a selenium-based catalyst system, and thus are more economical than a conventional carbonylation process and can obtain a dialkyl carbonate in feasible yields.