Process for preparing cyclohexane with starting materials originating from a steamcracking process

US10081580B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Steffen Tschirschwitz · Mannheim, DE
• Kathrin Wissel-Stoll · Ludwigshafen, DE
• Jochen Bürkle · Mannheim, DE
• Albena Kostova · Mannheim, DE
• Markus Schmitt · Nuremberg, DE
• Veronika Wloka · Mannheim, DE
• Stephan Deuerlein · Ludwigshafen, DE
• Marco Bosch · Mannheim, DE
• Steffen Oehlenschläger · Ludwigshafen, DE
• Michael Schreiber · Mannheim, DE
• Gauthier Luc Maurice Averlant · Frankfurt, DE
• Joni Joni · Pocking, DE
• Roman Prochazka · Mannheim, DE
• Martin Bock · Ludwigshafen, DE
• Alois Kindler · Haßloch, DE
• Daniela Malkowsky · Speyer, DE
• Katharina Spuhl · Forest, BE
• Stefan Bitterlich · Dirmstein, DE
• Daniel Pfeiffer · San Francisco, US

Key dates

• Filing date: Oct 15, 2013
• Grant date: Sep 25, 2018
• Expiry date: Jan 22, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation. High-purity (on-spec) cyclohexane is preferably isolated from the hydrocarbon mixture (HM2) obtained in the isomerization, the specifications being, for example, those applicable to the use of the cyclohexane for the preparation, known to those ski…