Preparation of oligomers of alkenes having from 4 to 8 carbon atoms

US7161054B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Heidemann · Viernheim, DE
• Armin Ulonska · Niederkirchen, DE
• Bianca Stäck · Schifferstadt, DE

Key dates

• Filing date: Feb 11, 2004
• Grant date: Jan 9, 2007
• Expiry date: Nov 3, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2523/755
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for preparing oligomers of alkenes having from 4 to 8 carbon atoms from a feed stream comprising such alkenes or hydrocarbon streams in which such alkenes are present over a nickel-containing, heterogeneous catalyst in n successive adiabatically operated reactors, where n is 2 or an integer greater than 2, at from 30 to 280° C. and pressures of from 1 to 300 bar, where the feed stream has a temperature Tin when it enters the first reaction zone, experiences a temperature increase in each reaction zone and, if this temperature increase is more than Tin+20° C., is brought to a temperature in the range Tin±20° C. before it enters a subsequent reaction zone, wherein the feed stream is divided and the feed substreams obtained in this way are fed to the 2 reactors, or if more than 2 reactors are used to at least 2 of the reactors, with addition of fresh feed in such a way that the temperature in one of the reactors is at most 20° C. higher than that in each of the other reactors used.