Butylene as a noun is any of three isomeric aliphatic alkenes containing four carbon atoms and one double bond; their polymers are used as synthetic rubber. while Butene as a noun is any of several forms of butylene.
Part of speech: noun
Definition: Any of three isomeric aliphatic alkenes containing four carbon atoms and one double bond; their polymers are used as synthetic rubber.
Part of speech: noun
Definition: Any of several forms of butylene.
We hope you now know whether to use Butylene or Butene in your sentence.