发明名称 |
Methylaluminoxane compositions, enriched solutions of such compositions, and the preparation thereof |
摘要 |
The methylaluminoxane composition (MAOC) is a solid at 25 C. that has a total aluminum content of about 39 to 47 wt %. The MAOC is either free of aluminum as trimethylaluminum (TMA) or if TMA is present, not more than about 30 mole % of the total aluminum in the MAOC is TMA. In the solid state the MAOC contains no more than about 2000 ppm (wt/wt) of aromatic hydrocarbon. The cryoscopic number average molecular weight of MAOC as determined in benzene is at least about 1000 amu, and the MAO has sufficient solubility in n-heptane at 25 C. to provide a solution containing 4 to as high as 7.5 wt % or more of dissolved aluminum. By vacuum distilling a solution of ordinary MAO in aromatic hydrocarbon long enough under proper conditions, MOAC is formed
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申请公布号 |
US6518445(B1) |
申请公布日期 |
2003.02.11 |
申请号 |
US20000739052 |
申请日期 |
2000.12.15 |
申请人 |
ALBEMARLE CORPORATION |
发明人 |
BRANTLEY NOEL H.;BEARD WILLIAM R. |
分类号 |
C07F5/06;C08F4/02;C08F4/44;C08F4/54;C08F4/60;C08F4/602;C08F10/00;C08F210/16;(IPC1-7):C07F5/06 |
主分类号 |
C07F5/06 |
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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