Patent ID: 11952333
Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of producing 1,3 butadiene, the method comprising:
extractive distilling of a C4 hydrocarbon feed to form a crude butadiene stream comprising 1,3 butadiene and one or more C4 acetylenes;
distilling, by one or more distillation columns, the crude butadiene stream to recover butadiene, acetylene and raffinate;
withdrawing, from the one or more distillation columns, a side stream comprising primarily the one or more C4 acetylenes; and
hydrogenating at least some of the C4 acetylene of the side stream to produce 1,3 butadiene in a product stream;
wherein the C4 hydrocarbon feed comprises C5+ hydrocarbons and one or more butanes, 1,2-butadiene, 1,3-butadiene, vinyl acetylene and ethyl acetylene; and
wherein the hydrogenating is conducted at a pressure of from 9 to 25 bar.