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    SYNTHESIS OF SPHERICAL ALUMINOSILICATE FROM HIGH-CONCENTRATION SOLUTION
    14.
    发明专利
    SYNTHESIS OF SPHERICAL ALUMINOSILICATE FROM HIGH-CONCENTRATION SOLUTION 失效

    公开(公告)号：JPH1179731A

    公开(公告)日：1999-03-23

    申请号：JP28629597

    申请日：1997-09-04

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： SUZUKI MASAYA ,  WATAMURA SHINJI ,  MAEDA MASAKI ,  INUKAI KEIICHI ,  OHASHI FUMIHIKO ,  SHIBAZAKI YASUO

    IPC: A61L9/01 ,  B01J20/12 ,  B01J20/16 ,  C01B13/32 ,  C01B33/26 ,  C01B33/40

    Abstract: PROBLEM TO BE SOLVED: To synthesize aluminosilicate in a large amt. in a short time while suppressing energy consumption by mixing a silicon compd. soln. of high concn. and an aluminum compd. soln., dropping an alkali soln. into the mixture to neutralize, and separating and collecting a solid content produced at room temp. SOLUTION: A silicon compd. soln. of 10 to 500 mmol, and an aluminum compd. soln. of 10 to 100 mmol are mixed with 0.5 to 2.0 molar ratio of silicon/ aluminum, and then an alkali soln. is dropped into the mixture soln. by 0.5 to 2 mol/min rate to neutralize and to produce a solid content at room temp. The produced solid content is separated by filtering and with a centrifugal separating machine, then cleaned, and dried to obtain spherical aluminosilicate. The obtd. spherical aluminosilicate is a highly functional porous material having 1 to 10 nm particle diameter, >=70 m /g specific surface area by nitrogen adsorption, and 0.5 to 2.0 silicon/aluminum ratio, and can be synthesized in a large amt. at room temp.

    METHOD FOR SEPARATING NITROGEN AND CARBON DIOXIDE USING CERAMIC SEPARATING MATERIAL
    15.
    发明专利
    METHOD FOR SEPARATING NITROGEN AND CARBON DIOXIDE USING CERAMIC SEPARATING MATERIAL 失效

    公开(公告)号：JPH0819722A

    公开(公告)日：1996-01-23

    申请号：JP30593493

    申请日：1993-11-10

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： HORIO MASAKAZU ,  SUZUKI KENJI ,  MORI TOSHIAKI ,  INUKAI KEIICHI ,  WATAMURA SHINJI

    IPC: B01D53/34 ,  B01D53/02 ,  B01D53/62 ,  B01J20/12 ,  B01J20/281 ,  C01B33/22 ,  C04B35/16

    Abstract: PURPOSE:To obtain a thermally stable separating material which can separate high temperature nitrogen and carbon dioxide by using ceramics prepared by a method in which sepiolite, after being ion-exchanged with zinc ion, is heat- treated as a separating material. CONSTITUTION:Sepiolte, a clay mineral, is added into an aqueous solution of zinc nitrate etc., and the mixture is stirred adequately and allowed to stand at room temperature so that sepiolite is ion-exchanged with zinc ion. The sepiolite is dried and heat-treated at 800 deg.C or below. When the separating material thus obtained is contacted with high temperature exhaust gas from fixed sources such as factories, nitrogen or carbon dioxide, after being adsorbed on the ceramics for the respective lengths of retention time, are desorbed. In this way, nitrogen and carbon dioxide are separated to contribute to the global environmental preservation.

    METHOD FOR IMPROVING THERMAL STABILITY OF SEPIOLITE
    16.
    发明专利
    METHOD FOR IMPROVING THERMAL STABILITY OF SEPIOLITE 失效

    公开(公告)号：JPH08253311A

    公开(公告)日：1996-10-01

    申请号：JP7981095

    申请日：1995-03-10

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： SUZUKI KENJI ,  INUKAI KEIICHI ,  WATAMURA SHINJI

    IPC: B01J21/16 ,  B01J29/06 ,  C01B33/22 ,  C01B33/36

    Abstract: PURPOSE: To provide a method for stable holding a sepiolite crystal structure even at a high temperature. CONSTITUTION: Sepiolite is well dispersed in a mineral acid and the sepiolite is recovered with centrifugation, filtration, etc., after being well dispersed and still standing. Subsequently, the recovered sepiolite is again dispersed in a solution of a divalent cation to carry out an ion-exchanging treatment and then the objective sepiolite is recovered by centrifugation, filtration, etc.

    HIGH TEMPERATURE SEPARATION OF CARBON DIOXIDE WITH DOLOMITE
    17.
    发明专利
    HIGH TEMPERATURE SEPARATION OF CARBON DIOXIDE WITH DOLOMITE 失效

    公开(公告)号：JPH08196856A

    公开(公告)日：1996-08-06

    申请号：JP3010695

    申请日：1995-01-26

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： SUZUKI KENJI ,  INUKAI KEIICHI

    IPC: B01D53/34 ,  B01D53/04 ,  B01D53/54 ,  B01D53/62 ,  B01D53/81 ,  C01B21/04 ,  C01B32/50 ,  C01B31/20

    Abstract: PURPOSE: To efficiently separate and recover specific gaseous components at a low cost by allowing a temp.-controlled exhaust combustion gas to pass through a specific adsorbent to adsorb specific gaseous components of the exhaust combustion gas on the adsorbent and, thereafter, separating and recovering the specific gaseous components through utilizing the difference in adsorption and desorption time between every two of the components. CONSTITUTION: In this separation, a high temp. exhaust combustion gas, as it is or after setting its temp. at a prescribed temp., preferably at a temp. within the range of 300 to 900 deg.C, is allowed to pass through an adsorbent that contains an inorganic solid material having surface basicity, such as dolomite, etc., and thereby, respective specific gaseous components such as carbon dioxide, etc., of the exhaust combustion gas are once adsorbed on the solid material and then, pass through the solid material while repeating adsorption and desorption of the components on and from the solid material. At this time, by utilizing the difference in time required for passing through the solid material while repeating adsorption and desorption of the components between every two of the specific gaseous components, each of the gaseous components is separated. Thus, each of the high temp. specific gaseous components, as it is, can selectively be separated and recovered. The specific gaseous components which are adsorbed on and desorbed from dolomite used as the adsorbent are separated from each other by utilizing the difference in retention time between every two of the components, and further, simply separated from each other by setting appropriate conditions such as temp., flow rate, flow velocity, etc., with respect to each of the components.

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