BR9811259A - "processo para fabricar sìlica gel hidrofóbica sob condições neutras" - Google Patents

"processo para fabricar sìlica gel hidrofóbica sob condições neutras"

Info

Publication number
BR9811259A
BR9811259A BR9811259-7A BR9811259A BR9811259A BR 9811259 A BR9811259 A BR 9811259A BR 9811259 A BR9811259 A BR 9811259A BR 9811259 A BR9811259 A BR 9811259A
Authority
BR
Brazil
Prior art keywords
under neutral
neutral conditions
silically
silica
hydrogel
Prior art date
Application number
BR9811259-7A
Other languages
English (en)
Inventor
Gary T Burns
Qin Deng
James R Hahn
Clifford C Reese
Original Assignee
Dow Corning
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Corning filed Critical Dow Corning
Publication of BR9811259A publication Critical patent/BR9811259A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/16—Preparation of silica xerogels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2962—Silane, silicone or siloxane in coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y10T428/2995—Silane, siloxane or silicone coating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

Patente de Invenção: <B>"PROCESSO PARA FABRICAR SìLICA GEL HIDROFóBICA SOB CONDIçõES NEUTRAS"<D>. A presente invenção refere-se aos sílica géiss hidrofóbica e a um processo para sua preparação sob condições neutras. O processo compreende duas etapas, em uma primeira etapa o pH de um hidrossol de sílica é ajustado com uma base para dentro de uma faixa de pH3 e pH7 para facilitar a formação de um hidrogel. Na segunda etapa, o hidrogel de sílica é contactado com um composto de organossilício na presença de uma quantidade catalítica de um ácido forte para efetuar a hidrofobia do hidrogel de sílica. Em um processo preferido, em uma terceira etapa, o sílica gel hidrofóbica é contactado com uma quantidade suficiente de um solvente orgânico imiscível em água para converter o hidrogel de sílica hidrofóbica em um organogel de sílica hidrofóbica.
BR9811259-7A 1997-02-24 1998-02-18 "processo para fabricar sìlica gel hidrofóbica sob condições neutras" BR9811259A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/805,398 US5708069A (en) 1997-02-24 1997-02-24 Method for making hydrophobic silica gels under neutral conditions
PCT/US1998/003154 WO1998037016A1 (en) 1997-02-24 1998-02-18 Method for making hydrophobic silica gels under neutral conditions

Publications (1)

Publication Number Publication Date
BR9811259A true BR9811259A (pt) 2000-09-19

Family

ID=25191466

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9811259-7A BR9811259A (pt) 1997-02-24 1998-02-18 "processo para fabricar sìlica gel hidrofóbica sob condições neutras"

Country Status (12)

Country Link
US (1) US5708069A (pt)
EP (1) EP0963346B1 (pt)
JP (1) JP4283895B2 (pt)
KR (1) KR100517443B1 (pt)
CN (1) CN1248224A (pt)
AU (1) AU6436098A (pt)
BR (1) BR9811259A (pt)
CA (1) CA2278505C (pt)
DE (1) DE69810902T2 (pt)
MY (1) MY133859A (pt)
TW (1) TW504496B (pt)
WO (1) WO1998037016A1 (pt)

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US5789495A (en) * 1997-02-24 1998-08-04 Dow Corning Corporation Method for making hydrophobic organosilicate-modified silica gels under neutral conditions
US5708069A (en) * 1997-02-24 1998-01-13 Dow Corning Corporation Method for making hydrophobic silica gels under neutral conditions
CA2280795A1 (en) * 1997-02-24 1998-08-27 James R. Hahn Hydrophobic silica gels with reduced surface area
US5942590A (en) * 1997-02-24 1999-08-24 Dow Corning Corporation Process for making hydrophobic silica with reduced surface area under neutral conditions
DE19718740A1 (de) 1997-05-02 1998-11-05 Hoechst Ag Verfahren zur Granulierung von Aerogelen
DE19718741A1 (de) 1997-05-02 1998-11-05 Hoechst Ag Verfahren zur Kompaktierung von Aerogelen
DE19756633A1 (de) 1997-12-19 1999-06-24 Hoechst Ag Verfahren zur unterkritischen Trocknung von Lyogelen zu Aerogelen
DE19801004A1 (de) * 1998-01-14 1999-07-15 Cabot Corp Verfahren zur Herstellung von im wesentlichen kugelförmigen Lyogelen in wasserunlöslichen Silylierungsmitteln
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JP2002502684A (ja) * 1998-02-09 2002-01-29 インダストリアル・サイエンス・アンド・テクノロジー・ネツトワーク・インコーポレーテツド 表面処理キセロゲルを用いたイオン分離
JP2002517585A (ja) * 1998-06-05 2002-06-18 カボット・コーポレーション ナノ多孔質相互浸透有機−無機網目構造
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CN102381714B (zh) * 2011-08-30 2013-06-12 中国石油化工股份有限公司 一种用于油气回收的疏水性硅胶的制备方法
CN102974322B (zh) * 2012-10-31 2014-12-03 浙江工业大学 一种疏水性的硅胶复合树脂基VOCs吸附剂
CN103911022B (zh) * 2014-04-10 2016-01-20 福建省馨和纳米硅业有限公司 一种粒径可控的纳米二氧化硅及其制备方法
CN106745000A (zh) * 2016-12-23 2017-05-31 伊科纳诺（北京）科技发展有限公司 一种水玻璃基二氧化硅气凝胶的制备方法
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Also Published As

Publication number Publication date
CA2278505A1 (en) 1998-08-27
DE69810902T2 (de) 2003-11-06
TW504496B (en) 2002-10-01
KR20000075497A (ko) 2000-12-15
KR100517443B1 (ko) 2005-09-29
WO1998037016A1 (en) 1998-08-27
AU6436098A (en) 1998-09-09
EP0963346B1 (en) 2003-01-22
DE69810902D1 (de) 2003-02-27
US5708069A (en) 1998-01-13
JP4283895B2 (ja) 2009-06-24
CA2278505C (en) 2007-06-05
MY133859A (en) 2007-11-30
JP2001516323A (ja) 2001-09-25
EP0963346A1 (en) 1999-12-15
CN1248224A (zh) 2000-03-22

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