Title:
METHOD FOR PREPARING SILICA MONOLITH POWDER BY USING FRACTIONAL PRECIPITATION METHOD, AND SILICA POWDER PREPARED THEREBY
Document Type and Number:
WIPO Patent Application WO/2019/031700
Kind Code:
A1
Abstract:
The present invention relates to: a method for preparing a silica monolith powder by using a fractional precipitation method; and a silica monolith powder prepared thereby and, more specifically, provides a method for preparing a silica monolith powder, the method: dispersing, in a suitable solvent, a silica monolith powder prepared by a known method; forcefully stirring the same and then leaving the same alone so as to use a property in which the settling velocity of particles differs according to size, thereby dividing a settling tank into several sections; and performing collection and filtering in each of the sections, thereby preparing the silica monolith powder in a state of being separated into several groups by particle size or in a state in which the size distribution width of each group is reduced. Compared with a conventional method for preparing a silica monolith powder, the present invention has a reduced size distribution width and, particularly, ultra-micro particles having a size of 1 μm or less are removed from the powder, of the main section of the lowest floor of a settling tank, having a recovery rate of 50% or more, thereby improving the chromatography separation efficiency of a stationary phase prepared by the derivatization thereof, and has an effect of improving overall preparation reproducibility since lumps, which have been incompletely treated during mechanical pulverization so as to become physically entangled, are disentangled by forceful stirring to be introduced during fractional precipitation.
More Like This:
Inventors:
CHEONG WON JO (KR)
Application Number:
PCT/KR2018/006751
Publication Date:
February 14, 2019
Filing Date:
June 15, 2018
Export Citation:
Assignee:
UNIV INHA RES & BUSINESS FOUND (KR)
International Classes:
C01B33/18; B01J20/281; B01J20/283; G01N30/00; G01N30/02
Foreign References:
| KR20160038983A | 2016-04-08 | |||
| KR20120036636A | 2012-04-18 | |||
| KR20070112940A | 2007-11-28 | |||
| JP2006076841A | 2006-03-23 |
Other References:
AIL, ASHRAF: "Preparation of C18 bound silica monolith particles as HPLC stationary phase of improved separation efficiency: Effect of sedimentation on separation efficiency", 118TH KOREAN CHEMICAL SOCIETY CONFERENCE AND GENRAL MEETING, 22 August 2016 (2016-08-22)
AIL, ASHRAF: "Sedimentation assisted preparation of ground particles of silica monolith and their C18 modification resulting in a chromatographic phase of improved separation efficiency", JOURNAL OF CHROMATOGRAPHY A, vol. 1525, 24 November 2017 (2017-11-24), pages 79 - 86, XP085274442
AIL, ASHRAF: "Sedimentation assisted preparation of ground particles of silica monolith and their C18 modification resulting in a chromatographic phase of improved separation efficiency", JOURNAL OF CHROMATOGRAPHY A, vol. 1525, 24 November 2017 (2017-11-24), pages 79 - 86, XP085274442
Attorney, Agent or Firm:
LEE, Won Hee (KR)
Download PDF:
Previous Patent: DEVICE FOR DRIVING SEMICONDUCTOR SWITCH
Next Patent: MULTIPLE LIDAR SYSTEM AND DRIVING METHOD THEREOF
Next Patent: MULTIPLE LIDAR SYSTEM AND DRIVING METHOD THEREOF