Lurgi Ag

Metallgesellschaft Aktiengesellschaft

Lurgi Gmbh

Air Liquide Global E&c Solutions Germany Gmbh

Waldemar Liebner

Hermann Bach

Harald Koempel

Gerhard Birke

Martin Rothaemel

Walter Boll

Bernd Ahlers

Veronika Gronemann

Gunter Quass

Harald Kömpel

Lothar Brehm

Uwe Zwiefelhofer

Martin Rothämel

Walter Boii

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 The dimethyl ether recovered is purified in at least one purification stage, wherein non-reacted methanol is withdrawn from the dimethyl ether purification stage and at least partly supplied to the final methanol purification.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 The reaction mixture is withdrawn from the reactor, charged to a mixture column and separated into a bottom product substantially consisting of water and a second distillate substantially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 The bottom product is either supplied to a top of the MeOH column or mixed with another bottom product withdrawn from a forerun column.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

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]

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

The burner has at least two fuel-carrying tubes which are arranged in parallel, the distance between adjacent fuel-carrying tubes being 5 to 30 cm. Each fuel-carrying tube is surrounded by a steam-carrying tube, which at its orifice end has a supply line for oxygen-containing gas. The steam-carrying tubes are surrounded by a common first cooling chamber through which cooling liquid is passed, the first cooling chamber constituting an annular chamber and extending into the area of the orifice ends of the steam-carrying tubes. Coaxial to the first cooling chamber a common second cooling chamber preferably is provided, which is surrounded by the first cooling chamber.

Burner for the partial oxidation of liquid fuels which contain carbon

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Oberursel, Germany

Waldemar Liebner