Fulvene purification

Details Fulvene purification Fulvene purification

2007-05-16

2009-08-11

Nguyen, Tam M (Department: 1797)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

C585S833000, C585S836000, C585S837000, C585S838000, C585S863000

Reexamination Certificate

active

07572948

ABSTRACT:
The present invention provides a method of removing undesired isomers, including substituted cyclopentadiene regioisomers, from the desired fulvene in a crude fulvene composition by selectively reacting the undesired isomers with pyrrolidine and 4-(N,N-dimethylamino)benzaldehyde. This reaction converts the undesired substituted cyclopentadienes into fulvene-type compounds that is readily separated from the desired fulvene.

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