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

Lurgi Ag

Air Liquide Global E&c Solutions Germany Gmbh

Lurgi Gmbh

Bernd Ahlers

Eckhard Seidel

Veronika Gronemann

Frank Castillo-Welter

Hermann Bach

Waldemar Liebner

Martin Rothaemel

Walter Boll

Harald Koempel

Gerhard Birke

Bryce Williams

Harald Kömpel

Peter Mitschke

Martin Gorny

Peter Trabold

Matthias Wagner

Lutz Janko

Stéphane Haag

Martin Rothämel

Harold Koempel

Juergen Hofmockel

Christopher Drosdzol

Manuela Gil De Tober

Frank Höper

Joerg Herzog

Jörg Herzog

Walter Boii

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

A cooled reactor for the production of dimethyl ether by catalytic dehydration of methanol in the gas phase, the reactor having an adiabatic catalyst bed as starting zone, a moderator zone cooled by direct or indirect heat exchange, and optionally an adiabatic catalyst bed as conditioning zone. The conversion of methanol to dimethyl ether is increased and the formation of undesired by-products is decreased.

Cooled reactor for the production of dimethyl ether from methanol

A method for starting up a DME synthesis reactor in which methanol is converted by dehydration to dimethyl ether on a solid catalyst, wherein the catalyst is heated up with condensing methanol vapor, possibly in several steps. In a final treatment step with superheated methanol vapor, the catalyst is dried and its temperature is raised to the starting temperature of the methanol dehydration.

Method for starting up a DME synthesis reactor

In the production of purified methanol and/or dimethyl ether from crude methanol, the crude methanol is processed in at least one prepurification stage, a first partial stream of the prepurified methanol is supplied to a final methanol purification and a second partial stream of the prepurified methanol is supplied to a reactor and at least partly converted to dimethyl ether. The dimethyl ether recovered is purified in at least one purification stage, wherein non-reacted methanol is withdrawn from the dimethyl ether purification stage and at least partly supplied to the final methanol purification. In this way, both purified methanol and dimethyl ether can be produced in parallel, wherein the quantities of both products obtained are flexibly adjustable.

Method and system for producing methanol and dimethyl ether

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

A method is disclosed for producing a synthetic fuel, especially diesel fuel and in addition gasoline, liquefied petroleum gas and heating gas from a gas mixture comprising an oxygenate wherein the oxygenate is methanol and/or dimethyl ether and/or another oxygenate, through a series of steps, including olefin-formation, oligomerization of the olefins, and several separation steps and recycling steps, in particular the recycling of a stream of saturated hydrocarbons following the oligomerization of olefins back to the olefin-forming stage, to obtain the diesel fuel and the other synthetic fuels in high yield.

Method for the production of synthetic fuels 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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Dietzenbach, Germany

Bernd Ahlers