Process for producing butene polymer
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United States of America Patent
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-
Oct 9, 2001
Grant Date -
N/A
app pub date -
Apr 15, 2000
filing date -
Aug 25, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
It is possible to produce butene polymer at high yield, which polymer contains 80 mol % or more of polymer molecules having terminal vinylidene structure and being low in the content of residual organic fluorine by a process comprising Step (I) to polymerize in liquid phase by adding complex catalyst composed of boron trifluoride, ether and alcohol and/or water in specified ratios to C.sub.4 fractions and Step (II) to reduce the content of trimer and lighter components contained in the obtained polymer to 0.2% by weight or less by distillation.
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