Method for separating 1-butene from C4-containing hydrocarbon streams by hydroformylation

US8404902B2 · kind B2 · utility

Assignee

• Evonik Oxeno GmbH · DE

Inventors

• Burkard Kreidler · Recklinghausen, DE
• Klaus-Diether Wiese · Haltern am See, DE
• Dieter Hess · Marl, DE
• Detlef Selent · Berlin, DE
• Armin Boerner · Rostock, DE

Key dates

• Filing date: Apr 28, 2009
• Grant date: Mar 26, 2013
• Expiry date: Oct 5, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/50
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for separating 1-butene from C4-containing hydrocarbon mixtures, comprising isobutene and 1-butene, by hydroformylation, wherein the catalytic system used is made of one of the transition metals of the group 8 to 10, preferably rhodium, and a bisphosphite ligand of the formula (I), where X is a divalent substituted or unsubstituted bisalkylene or bisarylene group having one or more heteroatom(s), Y is a divalent substituted or unsubstituted bisarylene or bisalkylene group having one or more heteroatom(s), Z is oxygen or NR9, and R1, R2, R3, R4 are identical or different, substituted or unsubstituted, linked, unlinked or condensed aryl or heteroaryl groups, and R9 is hydrogen or a substituted or unsubstituted alkyl or aryl group having one or more heteroatom(s), wherein the bisphosphite ligand of the formula (I) is used in an excess of a molar ratio of 100:1 to 1:1 to the transition metal, and that with a 1-butene conversion of more than 95% less than 5% of the present isobutene is reacted method for separating 1-butene from c4-containing hydrocarbon streams by hydroformylation.