Bp Koln Gmbh

Ineos Europe Limited

Alexander Gammersbach

Joachim Grub

Axel Gohrt

Stefan Kaminsky

Hans-Joachim Kramer

Hans-Jurgen Bister

Stefanie Konig

The invention relates to a process for preparing diisobutylene (DIB) from an i-butene-containing C raffinate I, in which the C stream is passed through a first hydroisomerization reactor (A) and a fractionation column (B) and is thus largely freed of 1-butene and 2-butene. It is subsequently dimerized over an acidic catalyst installed in a reactive column (E). The feed stream to this reactive column contains not only i-butene but also butanes which make the reaction temperature in the fixed bed controllable by removal of the heat of reaction. In the fractionation column (B), a side stream can be subjected to a further hydroisomerization in a reactor (C).

Process for the selective preparation of DIB from an i-butene-containing C4 stream

A process is provided which makes it possible to separate off cyclic acetals from wastewater streams to a substantial extent, by passing the wastewater stream over a heterogeneous acid catalyst.

Process for removing cyclic acetals from wastewater streams

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Neuss, Germany

Alexander Gammersbach