公开(公告)号：US06932953B2

公开(公告)日：2005-08-23

申请号：US10000340

申请日：2001-12-04

申请人： Masanobu Nishimine ,  Susumu Ueno ,  Yoichi Tanifuji ,  Tomoyoshi Koike ,  Tomio Iwase ,  Michiaki Sezai

发明人： Masanobu Nishimine ,  Susumu Ueno ,  Yoichi Tanifuji ,  Tomoyoshi Koike ,  Tomio Iwase ,  Michiaki Sezai

IPC分类号： C01B33/18

CPC分类号： C01B33/183 ,  C01P2002/84 ,  C01P2004/03 ,  C01P2006/12

摘要： Particulate silica is prepared by feeding a gas mixture of an organohalosilane gas, a flammable gas capable of generating water vapor when burned, and a free oxygen-containing gas to a reaction chamber through a multiple-tube burner, whereby the organohalosilane is subjected to flame hydrolysis and oxidation reaction. The amount of the flammable gas fed is 0.5-9 mol per mol of the organohalosilane and such that the amount of water vapor resulting from combustion of the flammable gas is 1-6 times the stoichiometric amount, and the gas mixture is fed to the center tube of the burner such that it may have a linear velocity at the outlet of 50-120 m/sec, calculated in the standard state. The resulting silica has a surface area of 100-400 m2/g and a narrow particle size distribution of primary particles and ensures the transparency of silicone rubber filled therewith.

摘要翻译： 通过将有机卤硅烷气体，能够在燃烧时产生水蒸汽的可燃气体和游离含氧气体的气体混合物通过多管燃烧器送入反应室来制备颗粒状二氧化硅，由此使有机卤代硅烷受到火焰 水解和氧化反应。 可燃气体的供给量为每摩尔有机卤代硅烷为0.5-9摩尔，使得由可燃性气体燃烧产生的水蒸气的量为化学计量的1-6倍，并将气体混合物供给到中心 燃烧器管，使得其可以在50-120m / sec的出口处具有以标准状态计算的线速度。 得到的二氧化硅的表面积为100-400m 2 / g，一次颗粒的粒度分布窄，确保了填充硅橡胶的透明度。