公开(公告)号：US10968237B2

公开(公告)日：2021-04-06

申请号：US16861300

申请日：2020-04-29

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Bok Ryul Yoo ,  Daejin Kim

IPC: C07F7/02 ,  B01J31/12

Abstract: A method for producing tetraalkoxysilane includes reacting a compound represented by Chemical Formula 1 below with an alkali metal at a molar ratio ranging from 1.0:1.0 to 1.0:1.1 and in the absence of a solvent to produce a basic catalyst represented by Chemical Formula 2 below; and mixing the basic catalyst represented by Chemical Formula 2, silicon metal, and an alcohol represented by Chemical Formula 3 below to produce tetraalkoxysilane:
Chemical Formula 1 R1O(CHR2CH2O)n—H, Chemical Formula 2 R1O(CHR2CH2O)n-M, and Chemical Formula 3 R3OH, where M is alkali metal, R1 represents a C1-C5 linear hydrocarbon group or a C3-C5 branched hydrocarbon group, R2 represents H or a C1-C3 linear hydrocarbon group, R3 represents a C1-C2 alkyl group, and n is an integer of 2-3. Thus, it is possible to increase the proportion of the catalyst in the process, and to minimize production of impurities caused by solvent decomposition.

公开(公告)号：US20200339609A1

公开(公告)日：2020-10-29

申请号：US16861300

申请日：2020-04-29

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Bok Ryul Yoo ,  Daejin Kim

IPC: C07F7/02 ,  B01J31/12

Abstract: The present disclosure relates to a method for producing tetraalkoxysilane continuously through direction of silicon metal with alcohol. In the method, a basic catalyst prepared in the absence of a solvent is used. Thus, it is possible to increase the proportion of the catalyst in the process, and to minimize production of impurities caused by solvent decomposition. In addition, it is possible to improve reaction efficiency and to simplify the purification process as compared to the method based on direct reaction according to the related art, and thus to produce tetraalkoxysilane with significantly higher cost efficiency as compared to the related art.