• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. Process for the pyrogenic production of silica, characterized in that a mixture of silicon tetrachloride and/or methyl trichlorsilane and hexamethyldisiloxane is used as the raw material.
    公开号:SU1421256A3
    申请号:SU813252703
    申请日:1981-03-02
    公开日:1988-08-30
    发明作者:Шварц Рудольф；Кляйншмит Петер
    申请人:Дегусса Аг (Фирма)；
    IPC主号:
    专利说明:

    SU)
    4 S
    Iss sp

    s
    mixing it with 15.89 nm heated to air. At the same time 1.09 m of hydrogen (48.64 mol) is fed into the burner and homogeneously mixed. The molar ratio of hexamethyldisiloxane to hydrogen is 1: 7o. The starting components are fed at a speed of 57 M / s.
    Peripheral amount of hydrogen is 0.35.
    Obtain 0.82 kg / h of silicon silicon with a specific surface according to BET 318 and a thickening ability of 6985 mPa in unsaturated polyethers
    Example The method is carried out as in Example 1, using 0.28 kg / h of hexamethyldisiloxane (1.73 mol), burning 1.74 of hydrogen (77.85 mol. The molar ratio of hexamethyldis10
    This invention relates to methods for producing pyrogenic silicic acid with a high specific surface, which is used as a thickener in a paint and varnish formulation in the manufacture of toothpastes in the pharmaceutical industry.
    The aim of the invention is to increase the thickening ability of silica in non-saturated polyesters to 4000-8000 MPa.
    Example 1. 0.819 L (1.13 kg) of hexamethyldisiloxane is evaporated, mixed with 16.86 mm of air heated to 120 ° C and introduced into the burner. At the same time 1.46 m of hydrogen are introduced into the burner and mixed homogeneously with two other components.
    The molar ratio of hexamethyldisis-20 loxane to hydrogen is 1:45. For burning a loxane to hydrogen 1: 9.38. They serve 8.59 nm / h of heated air.
    thirty
    The star-shaped internal devices of the burner body exfoliate the gas mixture, which exits the burner aperture and burns after the fire. The burner outlet has a diameter of 10 mm. The three precursors enter at a speed of 65.4 M / s and burn out after ignition by their flame. The amount of hydrogen in the shell is 0.36 m / h.
    The hot reaction products of the flame zone are absorbed into the cooling chamber. The BET surface area of the obtained silicic acid is 333 m / g. The viscosity of unsaturated polyester test lacquer, condensed with this product, is 7 595 MPa, is unusually high.
    In the bulk of the toothpaste, a concentration of 4,300 MPa is achieved. Silicic acid is very well dispersed in the bulk. The homogeneity of the condensed bulk is also good. No solid sintered particles. During multi-day storage of the condensed base paste, even more thickening is obtained, which reaches more than 6000 MPa.
    Example 2c. Same as in 35
    40
    45
    of the spirit. The velocity of the mixture of components from the burner was 37.9 m / s. 0.21 kg / h of pyrogenic silicic acid with a BET specific surface area of 295 m / g and a thickening ability in unsaturated polyesters of 4850 MPa are obtained. Thus, the proposed method allows to increase the specific surface area of silicic acid from M Vg of the prototype to 250-350 m and the thickening ability from 2000 to 3000 MPa of the prototype to 4000 to 8000 MPa.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    t
    A method of producing pyrogenic silicic acid, which involves burning the organosilicon compound in the presence of hydrogen, characterized in that, in order to increase the thickening ability of silicic acid in nonweathed polyethers, the combustion is carried out by feeding a homogeneous mixture of hexamethyldisiloxane, hydrogen and air from the burner calculating 7-45 mol of hydrogen per 1 mol of hexamethyldisiloxane with the amount of air in the mixture, sufficiently 1, incineration of 1, 13 kg / h 50 nom for burning hexamethyldisiloxane-hexametyldisiloxane (6.95 mole).
    Sana and Hydrogen
    VNIIPI Order 4337/59 Circulation 446
    Production polygr, pr-tie, Uzhgorod, st. Project, 4
    212562
    mixing it with 15.89 nm heated to air. At the same time 1.09 m of hydrogen (48.64 mol) is fed into the burner and homogeneously mixed. The molar ratio of hexamethyldisiloxane to hydrogen is 1: 7o. The starting components are fed at a speed of 57 M / s.
    Peripheral amount of hydrogen is 0.35.
    0.82 kg / h of silicic acid with a BET 318 specific surface area and a thickening ability of 6985 mPa in unsaturated polyethers are obtained.
    Example The method is carried out as in Example 1, using 0.28 kg / h of hexamethyldisiloxane (1.73 mol), burning 1.74 hydrogen (77.85 mol). The molar ratio of hexamethyldis10
    ,
    15
    of the spirit. The speed of the mixture of components from the burner is 37.9 m / s. 0.21 kg / h of pyrogenic silicic acid with a BET specific surface area of 295 m / g and a thickening ability in unsaturated polyesters of 4850 MPa are obtained. Thus, the proposed method allows to increase the specific surface area of silicic acid from M Vg of the prototype to 250-350 and the thickening ability from 2000 to 3000 MPa of the prototype to 4000 to 8000 MPa.
    Invention Formula
    t
    A method of producing pyrogenic silicic acid, which involves burning the organosilicon compound in the presence of hydrogen, characterized in that, in order to increase the thickening ability of silicic acid in non-saturated (polyethers), the combustion is carried out by feeding a homogeneous mixture of hexamethyldisiloxane, hydrogen and air from the calculation 7-45 mol of hydrogen per 1 mol of hexamethyldisiloxane with an amount of air in the mixture sufficient to burn hexamethyldisiloxane.
    nome for incineration
    Sana and Hydrogen
    Subscription
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    同族专利:
    公开号 | 公开日
    BR8102491A|1982-01-05|
    EP0038900B1|1984-03-21|
    JPH0131456B2|1989-06-26|
    EP0092024A1|1983-10-26|
    JPS56164009A|1981-12-16|
    EP0038900A1|1981-11-04|
    DE3162719D1|1984-04-26|
    DE3016010C2|1985-01-10|
    JPS60127215A|1985-07-06|
    EP0092024B1|1985-07-31|
    JPS6116733B2|1986-05-01|
    DD158228A5|1983-01-05|
    DE3016010A1|1981-10-29|
    AT14562T|1985-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2399687A|1942-05-29|1946-05-07|Goodrich Co B F|Preparation of finely-divided silicon dioxide|
    DE900339C|1951-07-05|1953-12-21|Degussa|Process and device for the production of colloidal silica in airgel form|
    US3086851A|1957-10-10|1963-04-23|Degussa|Burner for production of finely divided oxides|
    DE1933291C3|1969-07-01|1978-12-14|Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt|White colloidal anhydrous silica|
    GB1348372A|1970-02-16|1974-03-13|Ici Ltd|Foam-compatible powder compositions|
    DE2123233C3|1971-05-11|1977-10-13|Degussa|FINE-PARTED LARGE-SURFACE SILICON DIOXIDE|
    US3772427A|1971-06-14|1973-11-13|Gen Electric|Combustion process for producing high surface area silica|
    BE790704A|1971-10-28|1973-02-15|Degussa|PROCESS FOR THE MANUFACTURE OF OXIDES FINE|
    DE2344388B2|1973-09-03|1978-06-22|Elektroschmelzwerk Kempten Gmbh, 8000 Muenchen|Process for making hydrophobic silica|
    DE2403783C2|1974-01-26|1982-10-21|Bayer Ag, 5090 Leverkusen|Process for the production of hydrophobic fumed silica|
    DE2620737C2|1976-05-11|1982-07-29|Wacker-Chemie GmbH, 8000 München|Process for the preparation of fumed silica|
    DE2904199A1|1979-02-05|1980-08-07|Degussa|METHOD FOR THE GUIDED PRODUCTION OF SILICON BY MEANS OF FLAME HYDROLYSIS|
    DE2909815C2|1979-03-13|1984-11-22|Wacker-Chemie GmbH, 8000 München|Process for the production of fumed silica|US4386117A|1981-11-20|1983-05-31|Gordon Roy G|Coating process using alkoxy substituted silicon-bearing reactant|
    GB8905966D0|1989-03-15|1989-04-26|Tsl Group Plc|Improved vitreous silica products|
    US5152819A|1990-08-16|1992-10-06|Corning Incorporated|Method of making fused silica|
    KR19990082608A|1996-12-16|1999-11-25|알프레드 엘. 미첼슨|Raw materials and manufacturing methods for manufacturing germanium doped silica|
    KR20000076000A|1997-03-07|2000-12-26|알프레드 엘. 미첼슨|Method of making titania-doped fused silica|
    DE19936478A1|1999-08-03|2001-02-15|Degussa|Sintered materials|
    EP1122212B1|1999-11-11|2003-07-09|Degussa AG|Composite carbon clack-fumed silica nanostructured particles|
    DE10302914B4|2003-01-24|2005-12-29|Heraeus Quarzglas Gmbh & Co. Kg|Process for the production of synthetic quartz glass|
    DE10326049A1|2003-06-10|2004-12-30|Degussa Ag|Flame hydrolytically produced silicon dioxide, process for its production and use|
    US7824644B2|2005-05-19|2010-11-02|Tokuyama Corporation|Particulate silica|
    DE102011121356A1|2011-12-19|2013-06-20|Heraeus Quarzglas Gmbh & Co. Kg|Process for the production of synthetic quartz glass|
    WO2015003873A1|2013-07-11|2015-01-15|Evonik Industries Ag|Method for producing silicic acid with variable thickening|
    EP3002262B1|2014-10-01|2018-06-27|Heraeus Quarzglas GmbH & Co. KG|Method for the manufacture of synthetic quartz glass with polymerizable polyalkylsiloxane|
    EP3034476A1|2014-12-16|2016-06-22|Heraeus Quarzglas GmbH & Co. KG|Method for the preparation of synthetic quartz glass with the use of a cleaning device|
    EP3059212A1|2015-02-18|2016-08-24|Heraeus Quarzglas GmbH & Co. KG|Method and apparatus for making silica glass from polymerisable polyalkylsiloxane with membrane filter as cleaning device|
    EP3428135A1|2017-07-14|2019-01-16|Evonik Degussa GmbH|Heat insulating materials based onhigh-density silicic acid|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3016010A|DE3016010C2|1980-04-25|1980-04-25|Process for the pyrogenic production of silica|
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