Determination of Butadiene Dimer (4-Vinyl-1-cyclohexene) in 1,3-Butadiene

Apparatus for Quantitative Separation of Butadiene from Its Dimer

“…The investigations in this laboratory centered around chemical methods for determining dimer in 1,3-butadiene in order to avoid repeated weighings and to decrease the over-all time required by physical methods. The requirements for such a method included 1 Present address, Development Laboratory, Sun Oil Company, Marcus Hook, Pa. a means for the removal of the butadiene without loss of dimer, and a quantitative chemical determination not affected by the presence of p-tert butylcatechol (an antioxidant) and other nonvolatile residues usually present in polymerization grade butadiene. Subsequent to the work described herein several chemical methods for determining dimer or pure 4-vinyl-1-cyclohexene in products other than butadiene were described.…”