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    METHOD FOR SYNTHESIZING PRE-HYDROLYZED ALKYL POLYSILICATE
    53.
    发明申请
    METHOD FOR SYNTHESIZING PRE-HYDROLYZED ALKYL POLYSILICATE 审中-公开

    公开(公告)号：US20190330423A1

    公开(公告)日：2019-10-31

    申请号：US16065720

    申请日：2017-10-30

    Applicant: LG CHEM, LTD.

    Inventor： Kyu Reon LEE ,  Kyoung Shil OH ,  Je Kyun LEE

    IPC: C08G77/02

    Abstract: The present invention relates to a two-step synthesis method of a pre-hydrolyzed alkyl polysilicate. In the method, a silica precursor hydrated to 90 to 100% is added to maximize a condensation reaction rate, and a silica precursor hydrated to 25 to 70% is additionally added to terminate a condensation reaction, so that a condensation reaction time may be remarkably shortened relative to a conventional one-step synthesis method and may be shortened even without the use of a condensation catalyst, so that the catalyst purchase cost and the catalyst separation step in the process may not be required, thus having a simple process and reducing the production cost. Also, the amount and time point of the silica precursor additionally added may be controlled, thereby easily controlling the gelation reaction time and the weight average molecular weight, and synthesizing the pre-hydrolyzed alkyl polysilicate excellent in storage stability and processabilty.

    METHOD FOR PRODUCING SYNTHETIC HECTORITE AT LOW TEMPERATURE AND ATMOSPHERIC PRESSURE
    56.
    发明申请
    METHOD FOR PRODUCING SYNTHETIC HECTORITE AT LOW TEMPERATURE AND ATMOSPHERIC PRESSURE 审中-公开

    公开(公告)号：US20190135645A1

    公开(公告)日：2019-05-09

    申请号：US16074411

    申请日：2017-09-29

    Applicant: LG CHEM, LTD.

    Inventor： Jong Hun KIM ,  Je Kyun LEE

    IPC: C01B33/40

    Abstract: The present invention relates to a low-temperature/atmospheric-pressure method for producing synthetic hectorite and synthetic hectorite produced using the same, and more particularly, provides a method for producing synthetic hectorite at a low temperature and atmospheric pressure and synthetic hectorite produced using the same such that: a crystallization reaction may be carried out under a low-temperature/atmospheric-pressure condition by introducing a step of forming a precipitate and using a weak basic catalyst when the Li—Mg precipitates are formed; a reaction time may be reduced; synthetic hectorite with excellent major application properties may be prepared; and the properties may be easily controlled by controlling a composition ratio of a reactant.

    SYSTEM FOR PREPARING SILICA AEROGEL
    57.
    发明申请
    SYSTEM FOR PREPARING SILICA AEROGEL 审中-公开

    公开(公告)号：US20180370809A1

    公开(公告)日：2018-12-27

    申请号：US15742865

    申请日：2017-03-07

    Applicant: LG CHEM, LTD.

    Inventor： Dong Kwon LEE ,  Ye Hon KIM ,  Jong Ku LEE ,  Je Kyun LEE

    IPC: C01B33/158 ,  B01D3/14 ,  B01D5/00

    CPC classification number: C01B33/1585 ,  B01D3/14 ,  B01D5/0045 ,  B01D5/006 ,  C02F1/52

    Abstract: The system for preparing silica aerogel comprises a raw material supply part transferring at least one raw material of de-ionized water, water glass, a surface modifier, an inorganic acid, and an organic solvent to a mixing part, the mixing part mixing the raw materials transferred from the raw material supply part to produce silica wet gel, a separating part separating at least one raw material of the raw materials from the mixture containing the silica wet gel transferred from the mixing part, a drying part drying the silica wet gel transferred from the separating part to produce the silica aerogel, a recovery part recovering a portion of the vaporized raw material of the raw materials used in at least one of the mixing part and the drying part, and a heat transfer part transferring heat to at least one of the mixing part and the drying part.

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