公开(公告)号：US20180002181A1

公开(公告)日：2018-01-04

申请号：US15537205

申请日：2016-11-04

Applicant: LG CHEM, LTD.

Inventor： Young Hun KIM ,  Sung Min YU ,  Je Kyun LEE

IPC: C01B33/154 ,  C08K3/36 ,  C01B33/158

CPC classification number: C01B33/154 ,  C01B33/158 ,  C08K3/36

Abstract: The present invention relates to a method of preparing a high hydrophobic silica aerogel having a high specific surface area and a low tap density, and a hydrophobic silica aerogel prepared thereby. The method of preparing a hydrophobic silica aerogel according to the present invention may have good productivity and economic efficiency, because preparation time is reduced by simultaneously performing surface modification, gelation, and solvent substitution in a single step, and may control a degree of hydrophobicity of the prepared silica aerogel by controlling a surface modification reaction by including a step of adding ammonium hydroxide. Thus, the preparation method according to the present invention and the hydrophobic silica aerogel are suitable for industries that need the method and the hydrophobic silica aerogel, particularly, industries that need a silica aerogel having high hydrophobicity or industries that need a silica aerogel having various degrees of hydrophobicity.

公开(公告)号：US20220144652A1

公开(公告)日：2022-05-12

申请号：US17584625

申请日：2022-01-26

Applicant: LG CHEM, LTD.

Inventor： Jong Hun KIM ,  Je Kyun LEE

IPC: C01B33/24 ,  B01J13/00

Abstract: Provided is a method of preparing a metal oxide-silica composite aerogel and a metal oxide-silica composite aerogel having an excellent weight reduction property prepared by the method. The method comprises adding an acid catalyst to a first water glass solution to prepare an acidic water glass solution (step 1); adding a metal ion solution to the acidic water glass solution to prepare a precursor solution (step 2); and adding a second water glass solution to the precursor solution and performing a gelation reaction (step 3).

公开(公告)号：US20210016239A1

公开(公告)日：2021-01-21

申请号：US16492912

申请日：2018-09-07

Applicant: LG CHEM, LTD.

Inventor： Jong Hun KIM ,  Je Kyun LEE

IPC: B01J13/00 ,  C01B33/158

Abstract: Provided are a method of preparing a metal oxide-silica composite aerogel, and a metal oxide-silica composite aerogel having an excellent weight reduction property prepared by the method. The method includes a step of adding an acid catalyst to a first water glass solution to prepare an acidic water glass solution (step 1); a step of adding a metal ion solution to the acidic water glass solution to prepare a precursor solution (step 2); and a step of adding a second water glass solution to the precursor solution and performing a gelation reaction (step 3) to yield a metal oxide-silica composite wet gel, wherein, in steps 2 and 3, bubbling of an inert gas is performed during the adding of the metal ion solution or the second water glass solution, respectively.

公开(公告)号：US20200179894A1

公开(公告)日：2020-06-11

申请号：US16315572

申请日：2017-10-10

Applicant: LG CHEM, LTD.

Inventor： Tae Gyeong KANG ,  Je Kyun LEE ,  Jong Hun KIM

IPC: B01J13/00 ,  C01B33/158 ,  C01B33/159

Abstract: A method for producing a plate type metal-silica composite aerogel and a plate type metal-silica composite aerogel produced thereby in which the metal salt concentration and the basic catalyst concentration are adjusted to form a plate type intermediate first, and then an appropriate amount of a water glass solution is added, thereby enabling the plate type metal-silica composite aerogel to be produced in a short time under conditions of low temperature and atmospheric pressure, so that the process is simpler than the conventional production method, and the cost is reduced, which is excellent in economy. Also provided is a plate type metal-silica composite aerogel, which is produced by the claimed method and has excellent dispersibility that requires no additional surface modifier.

公开(公告)号：US20190256360A1

公开(公告)日：2019-08-22

申请号：US16333523

申请日：2017-10-24

Applicant: LG CHEM, LTD. ,  INHA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Young Hun KIM ,  Je Kyun LEE ,  Hae Jin HWANG ,  Kyoung Jin LEE

IPC: C01B32/97 ,  C01B33/154 ,  C01B33/158

Abstract: The present invention relates to a method of preparing ultra-pure silicon carbide in which a super-porous spherical silica aerogel is used as a silica raw material. By preparing the silica aerogel particles using low-cost water glass, a reaction area with respect to a carbon raw material is increased to enable low-temperature synthesis of silicon carbide, the size and shape of silicon carbide powder may be uniformly controlled to prepare ultra-pure silicon carbide, and economic efficiency and productivity of the silicon carbide synthesis may be improved. Thus, it is expected that the silicon carbide powder prepared by the preparation method of the present invention may be provided as an optimized raw material for the preparation of silicon carbide sintered body and single crystal (ingot).

公开(公告)号：US20190194027A1

公开(公告)日：2019-06-27

申请号：US16069677

申请日：2017-09-12

Applicant: LG Chem, Ltd.

Inventor： Young Hun KIM ,  Je Kyun LEE

IPC: C01B33/158 ,  C01B33/145 ,  C01B33/154

CPC classification number: C01B33/1585 ,  C01B33/145 ,  C01B33/154 ,  C01B33/155 ,  C01B33/157

Abstract: The present invention relates to a method for producing a silica aerogel and a silica aerogel produced thereby. The present invention provides a two-step process of a nucleation step of forming silica colloid particles by using a low-concentration silica precursor and a growth step of further adding a relatively high-concentration silica precursor to form a silica wet gel by using the silica colloid particles as a seed. Thus, the present invention provides a method for producing a silica aerogel of which mechanical stability is improved to enhance pore characteristics, and physical properties are readily controllable, and also provides a silica aerogel produced thereby.

公开(公告)号：US20190062169A1

公开(公告)日：2019-02-28

申请号：US15768999

申请日：2017-09-06

Applicant: LG CHEM, LTD.

Inventor： Young Hun KIM ,  Je Kyun LEE

IPC: C01B33/158

Abstract: The present invention relates to a method for producing a silica aerogel and a silica aerogel produced thereby. More specifically, a first water glass solution is used to form a first silica wet gel, and then a second water glass solution is additionally added to form a second silica wet gel organically bonded to the first silica wet gel which serves as a basic skeleton, so that a silica aerogel with enhanced physical properties is formed to increase the resistance to shrinkage in ambient drying, and the concentration of silicon dioxide in each of the first and second water glass solutions is controlled, thereby providing a method for producing a silica aerogel by which a silica aerogel having a specific tap density and controllable density can be produced, and also providing a silicon aerogel produced by the method.

公开(公告)号：US20180305215A1

公开(公告)日：2018-10-25

申请号：US15768995

申请日：2017-09-06

Applicant: LG CHEM, LTD.

Inventor： Young Hun KIM ,  Je Kyun LEE

IPC: C01B33/158 ,  C01B33/154 ,  C01B33/32 ,  B01J13/00

CPC classification number: C01B33/1585 ,  B01J13/0056 ,  B01J13/0082 ,  B01J13/0091 ,  C01B33/1546 ,  C01B33/157 ,  C01B33/158 ,  C01B33/16 ,  C01B33/325

Abstract: The present invention relates to a method for producing a silica aerogel and a silica aerogel produced thereby. More specifically, a first water glass solution is used to form a first silica wet gel, and then a second water glass solution is additionally added to form a second silica wet gel organically bonded to the first silica wet gel which serves as a basic skeleton, so that a silica aerogel with enhanced physical properties is formed to increase the resistance to shrinkage in ambient drying. Thus, a low-density silica aerogel may be formed, and the concentrations of the first and second water glass solutions may be adjusted to control the physical properties of the silica aerogel.

公开(公告)号：US20180148888A1

公开(公告)日：2018-05-31

申请号：US15576261

申请日：2017-02-07

Applicant: LG CHEM, LTD

Inventor： Ye Hon KIM ,  Je Kyun LEE

IPC: D06M11/79 ,  C01B33/158

CPC classification number: D06M11/79 ,  B01J31/02 ,  B01J37/0215 ,  B01J37/04 ,  B05C3/109 ,  B65G47/91 ,  B65G49/00 ,  C01B33/158 ,  C01B33/1585

Abstract: The present invention relates to an apparatus of manufacturing an aerogel sheet. The apparatus of manufacturing the aerogel sheet includes: a tray device in which a fiber sheet is accommodated; a rotation device including a rotation rod to which the tray device is fixed and a driving member rotating the rotation rod so that the tray device is disposed on an upper and lower portion of the rotation rod; an injection device injecting a silica precursor into the tray device disposed on the upper portion of the rotation rod to impregnate the silica precursor into the fiber sheet; and a surface modification device injecting a coating solution into the tray device disposed on the lower portion of the rotation rod to modify a surface of the fiber sheet in which the silica precursor is impregnated.

公开(公告)号：US20180010726A1

公开(公告)日：2018-01-11

申请号：US15548621

申请日：2016-02-04

Applicant: LG CHEM, LTD.

Inventor： Mi Ri KIM ,  Jin Hee OH ,  Kyoung Shil OH ,  Je Kyun LEE

IPC: F16L59/02 ,  C09D1/00 ,  C01B33/158 ,  C01B33/155 ,  C09D7/12 ,  B05D1/18

CPC classification number: F16L59/026 ,  B05D1/18 ,  C01B33/155 ,  C01B33/1585 ,  C09D1/00 ,  C09D7/63 ,  F16L59/02 ,  F16L59/028

Abstract: Provided are a preparation method of a silica aerogel-containing blanket which includes mixing a water glass solution, a polar organic solvent, and a silazane-based surface modifier to prepare a sol, preparing a silica gel-base material composite by immersion and gelation of a base material for a blanket in the sol, and drying the silica gel-base material composite, and a silica aerogel-containing blanket prepared by using the preparation method.A silica aerogel-containing blanket having a high degree of hydrophobicity as well as excellent physical properties, particularly, low tap density, high porosity, and excellent mechanical flexibility may be prepared by the minimal use of a surface modifier without a surface modification step by the above method.