Lurgi Ag

Lurgi Gmbh

Air Liquide Global E&c Solutions Germany Gmbh

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Hermann Bach

Gerhard Birke

Martin Rothaemel

Bernd Ahlers

Harald Koempel

Waldemar Liebner

Walter Boll

Harald Kömpel

Veronika Gronemann

Thomas Renner

Gunter Quass

Lothar Brehm

Martin Gorny

Theis Ohlhaver

Peter Trabold

Holger Dropsch

Stéphane Haag

Katja Bartels

Sandra Jensen

Michael Wilken

Jurgen Bohle

Gunther Heinz

Heinrich Dörr

Frank Höper

Jürgen Bohle

Martin ROTHÄMEL

Martin Rothämel

Walter Boii

Günther Heinz

A process for producing olefins from oxygenates comprises the following steps: Furthermore, the invention also comprises a plant for carrying out this process.

Process and plant for producing olefins from oxygenates

In the production of low-molecular olefins, in particular of ethylene and propylene, an educt stream (O) containing at least one oxygenate and an educt stream (C) containing at least one Colefin are simultaneously converted in at least one identical reactor on an identical catalyst to obtain a product mixture (P) comprising low-molecular olefins and gasoline hydrocarbons. The ratio (V) of oxygenates in the educt stream (O) to Colefins in the educt stream (C) here is 0.05 to 0.5 and is calculated according to the following formula: with:

Process and plant for the production of lower-molecular olefins

A process and a plant for producing an olefin stream from a hydrocarbon mixture feed stream, wherein the olefin stream is depleted as regards its content of oxygen-containing organic compounds (oxygenates) as compared to the feed stream. The hydrocarbon mixture feed stream is charged to a separation column operated by a thermal separation process, for example to a distillation column, wherein a material stream enriched in oxygenates is withdrawn via a side outlet and removed from the process. The process according to the invention is particularly useful for processing the product streams obtained in the olefin synthesis by an OTO process.

Method and system for producing low-oxygenate OLEFIN flows

A process produces dimethyl ether (DME) from methanol (MeOH). The process includes charging a feed mixture consisting of raw MeOH and a process-internally obtained return flow substantially consisting of unconverted MeOH and reaction water to an MeOH column. The feed mixture is evaporated in the MeOH column to form a first distillate substantially consisting of vaporous MeOH. The first distillate is supplied to a reactor and the MeOH is converted to DME by splitting off water in the reactor so as to form a reaction mixture. The reaction mixture is withdrawn from the reactor, charged to a mixture column and separated into a bottom product substantially consisting of water and a second distillate substantially consisting of DME and MeOH. The second distillate is separated in a DME column into a third distillate substantially consisting of DME, a bottom product consisting essentially of water-poor MeOH, and uncondensable gases discharged overhead. The bottom product is either supplied to a top of the MeOH column or mixed with another bottom product withdrawn from a forerun column.

Method and device for producing dimethyl ether from methanol

In a process for the preparation of C- to C-olefins, a feed stream comprising oxygenates and steam is passed through at least one fixed-bed zone comprising zeolite catalyst, where the oxygenates are converted catalytically into olefins with high selectivity for lower olefins, and the reaction mixture leaving the fixed-bed zone is separated into a first product stream comprising C- to C-olefins and inert gas components, at least one second product stream comprising C-olefins, and a third product stream consisting of aqueous phase. In order to improve the yield of lower olefins, the aim is to regulate the temperature of the catalytic reaction in accordance with a target temperature value in the range from 440 to 520&#xb0; C. specified for the reaction mixture exiting the fixed-bed zone by means of a supplementary stream consisting of olefins and inert gas components fed into the feed stream.

[object Object]

A reactor is described for the production of Cto Colefins from gaseous oxygenate and HO and one or more material flows containing CC, C, C, C, Colefin and paraffin at 400&#xb0; to 470&#xb0; C., wherein several reaction stages which the material flow can pass through from the top to the bottom, each consisting of a support base with a catalyst layer situated on it, are arranged in a closed, upright container. In order to be able in each case to lower the temperature of the reaction mixture leaving the reaction stages before it enters into the next reaction stage, it is provided that each support base consists of cells which are placed closely next to each other with no gaps and which are securely attached to each other and filled with catalyst, and in the space formed by two neighboring reaction stages, respectively, an assembly of nozzle tubes is installed for spraying a liquid phase containing HO and DME and/or MEOH, using a water-saturated gas phase containing mainly DME and/or MEOH, in the direction of the following reaction stage downstream.

Method and device for manufacturing at least one low olefin from an oxygenate-containing first reaction mixture () through conversion by a catalyst () to an olefin and paraffin-containing second reaction mixture () where the second reaction mixture () is flowed through a separation system (), in which one at least one low olefin-containing first product stream () and at least one paraffin-enriched fraction () is extracted and where the remaining product stream () is at least partially recirculated to the catalyst ().

Method and device for producing lower olefins from oxygenates

In a method for the production of propylene, a charge stream containing Cto Colefins is evaporated, superheated, mixed with hot water vapor, the olefins vapor mixture converted on a zeolite catalyst, the reaction mixture formed thereby cooled, and then partially condensed. In order to increase the yield of propylene, the gaseous phase containing ethylene, propylene, Cto Colefins, and additional hydrocarbons that is accumulated during the partial condensation is compressed, the gaseous and liquid phase containing propylene, ethylene, and other light hydrocarbons that exit from the compression step is separated into a gaseous phase containing propylene, ethylene, and other light hydrocarbons and a liquid phase containing C+ olefins, and the liquid phase is separated into a fraction containing Cto Colefins and a fraction containing C+ olefins.

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Heiligenroth, Germany

Hermann Bach