发明名称 |
Particulate silica and its preparation |
摘要 |
<p>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 m<2>/g and a narrow particle size distribution of primary particles and ensures the transparency of silicone rubber filled therewith.</p> |
申请公布号 |
EP1213263(A2) |
申请公布日期 |
2002.06.12 |
申请号 |
EP20010310170 |
申请日期 |
2001.12.05 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
NISHIMINE, MASANOBU;UENO, SUSUMU;TANIFUJI, YOICHI;KOIKE, TOMOYOSHI;IWASE, TOMIO;SEZAI, MICHIAKI |
分类号 |
C01B33/18;(IPC1-7):C01B33/18 |
主分类号 |
C01B33/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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