Systems and methods for isoprene purification
AssigneeSabic Global Technologies B.V.
InventorErnesto Uehara
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Abstract
Methods for the selective hydrogenation of acetylenic compounds in a product stream that includes isoprene. A method of selectively hydrogenating an acetylenic hydrocarbon in the presence of isoprene may include obtaining a hydrocarbon mixture comprising an acetylenic hydrocarbon, isoprene, and butadiene or cyclopentadiene, or both. If cyclopentadiene is present, the hydrocarbon mixture may comprise greater than 2 wt. % cyclopentadiene. The method may further include contacting the hydrocarbon mixture and hydrogen (H2) with a hydrogenation catalyst under reaction conditions that are more selective to the hydrogenation of the acetylenic hydrocarbon than the isoprene.
Claims15
A method of selectively hydrogenating an acetylenic hydrocarbon wherein isoprene is present, the method comprising the steps of:
- (a) obtaining a hydrocarbon mixture comprising (i) an acetylenic hydrocarbon, (ii) isoprene, and (iii) at least one member selected from the group consisting of butadiene and cyclopentadiene, wherein the hydrocarbon mixture comprises greater than 2 wt. % cyclopentadiene, if present;
- and
- (b) contacting in a reactor the hydrocarbon mixture and hydrogen (H2) with a hydrogenation catalyst comprising platinum under reaction conditions that are more selective to hydrogenation of the acetylenic hydrocarbon than the isoprene to produce an effluent comprising a hydrogenated compound;
- wherein the reaction conditions within the reactor for the selective hydrogenation of acetylenic hydrocarbons include a pressure in a range of from 1 to 10 bar(g) and a temperature in a range of from 55 to 80° C.
Dependencies are inferred from the claim text.