Basf Se Corporation

Basell Polyolefine Gmbh

Linde Gmbh

Axel Sperber

Alexander Weck

Rainer Karer

Manfred Hecker

Paulus De Lange

Hendrik Reyneke

Klaus Berhalter

Cyrus Ahmadzade-Youssefi

Martin Kamann

Jörg Halpap

Eberhard Herrmann

Clemens Prunner

Gunter Garbe

Daniel Keck

Carl Schietekat

Peter Brehm

Benedikt Keller

A method for producing ethylene and/or other olefins by steam cracking includes charging one or more crackers with a paraffin-containing feed and withdrawing a crude gas from the one or more crackers. The crude gas is subjected at least in part to a treatment comprising a crude gas compression and a thermal separation using a C2 refrigerant and a C3 refrigerant. A crude gas compressor is used for the crude gas compression, wherein the ethylene refrigerant is compressed using a C2 refrigerant compressor. The propylene refrigerant is compressed using a C3 refrigerant compressor. The crude gas compressor comprises two serial compressor trains. The compressor trains, the C2 refrigerant compressor and the C3 refrigerant compressor are each operated at least in part using electrical drives, which have at least partially identical power features, are provided as variable-speed drives of the same construction, and are each fed via frequency converters.

Method and plant for producing ethylene and/or other olefins by steam cracking

An apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (), a recycle gas line () connected to the reactor for discharging and recirculating the recycle gas stream comprising the unpolymerized olefin and a cyclone () located in the recycle gas line for the reduction and precipitation of the solid particles entrained in the recycle gas from the reactor, with the cyclone comprising an upper section () which has an essentially vertical central axis, whose wall extends along a rotationally symmetric body and which is provided with a cyclone inlet () arranged eccentrically relative to the central axis, a middle section () which adjoins the upper section () and whose wall extends along a rotationally symmetric body which tapers in a downward direction, a lower section () for discharging the solid particles precipitated from the recycle gas which adjoins the middle section () and whose wall extends along a rotationally symmetric body and a tube () extending essentially axially symmetrically down into the upper section and, if appropriate, the middle section for discharging the recycle gas which has been freed of the particles. According to the invention the ratio Hof the distance hfrom the lower end of the tube () extending downward into the cyclone to the intersection () of an imaginary extension of the wall of the downward-extending tube () with the wall of the middle section () to the diameter dof the downward-extending tube () is from 3 to 8, in particular from 4 to 7.

Apparatus for the gas-phase polymerization of olefins, in particular ethylene

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Ludwigshafen, Germany

Axel Sperber