SELECTIVE CYCLODIMERIZATION OF 1,3-BUTADIENE CONTAINED IN A COMMERCIAL C-4 HYDROCARBON STREAM

摘要

There is disclosed a method of recovering the 1,3-butadiene values from a commercial crude C-4 hydrocarbon stream comprising selectively dimerizing the butadiene values of 1,5-cyclooctadiene, flash distilling to separate the C-4 hydrocarbons from the 1,5-cyclooctadiene. The catalyst employed in the cyclodimerization step comprises (1) iron salts or iron complexes, (2) an organometallic reducing agent and (3) certain ligands containing nitrogen.