Preparation of oligomers of alkenes having from 4 to 8...

Details Preparation of oligomers of alkenes having from 4 to 8... Preparation of oligomers of alkenes having from 4 to 8...

2007-01-09

2007-01-09

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By addition of entire unsaturated molecules, e.g.,...

C585S517000, C585S503000

Reexamination Certificate

active

10775064

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 Tinwhen 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.

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