Patent ID: 9266795
Filing Date: 2016-02-23
CPC Classification: C07C

Claim Text:
1. A process for the purification of 1,3-butadiene, comprising: passing a butadiene stream to a butene-2 column, thereby generating an overhead stream comprising butadiene, a side draw stream comprising n-butane and 2-butene, and a bottoms stream comprising vinyl acetylene, oxygenates, and heavier hydrocarbons; passing the overhead stream to a butadiene extraction unit, thereby generating a purified 1,3-butadiene product stream; passing the side draw stream to a dimerization unit to generate a process stream comprising octene and a raffinate stream; passing the raffinate stream to a dehydrogenation unit to generate a dehydrogenation process stream comprising butadiene; passing a portion of the bottoms stream to a selective hydrogenation process to generate a selective hydrogenation process stream comprising n-butane, 2-butene, and butadiene; passing the dehydrogenation process stream and the hydrogenation process stream to the butene-2 column.