发明名称 |
Porous silica microspheres having silanol-enriched and silanized surfaces. |
摘要 |
<p>A chromatographic material having improved crush resistance and a high level of surface silanol groups comprises porous silica microspheres having an average diameter of about 0.5 to about 35 mu m, substantially all of said microspheres having a diameter ranging from about 0.5 to about 1.5 times said average diameter; said microspheres comprising a plurality of substantially uniform-size colloidal particles, having a silica surface, arranged in an interconnected three-dimensional lattice; said colloidal particles occupying less than about 50 volume percent of said microspheres with the remaining volume being occupied by interconnected pores having substantially uniform pore size distribution; said microspheres having a total concentration of silanol groups from about 6 to about 16 mu mol/m<2>. The material may be reacted with a silanizing agent to generate a completely silanized surface.</p> |
申请公布号 |
EP0221780(A2) |
申请公布日期 |
1987.05.13 |
申请号 |
EP19860308493 |
申请日期 |
1986.10.31 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
KIRKLAND, JOSEPH JACK;KOHLER, JURGEN |
分类号 |
B01J20/281;B01J20/10;B01J20/283;C01B33/12;G01N30/88;(IPC1-7):G01N30/48 |
主分类号 |
B01J20/281 |
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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