Assertion: pure butadiene | /r/HasProperty | removed through polymer
Facets:
value: overhead
type: LOCATION
Source sentences:
text: In the Ui'inal fractionation, butene-2 and vinylacetylene, if any, are charged to fractionator I4 through line I2; substantially pure butadiene is removed overhead through line I5 and the butene-2 and any vinylacetylene, plus any small amounts or furfural and polymer of butadiene or furfural that may have carriedfover from the stripper column I'Iare removed from the bottom of fractionator I4 through line I6.