Linde Aktiengesellschaft

Plansee Se

Nicole Schodel

Florian Winkler

Roland Ritter

Marco Brandner

Karlheinz Scheiber

Eberhard Lassmann

Holger Schmigalle

Ernst Haidegger

Axel Behrens

Harald Schmaderer

Torsten Stoffregen

Klaus Klapper

Hans-Jorg Zander

Holger Hackner

Hans Jorg Zander

Wolfgang Haring

Matthias Ruttinger

Markus Kogl

The invention relates to a method for processing coke oven gas, said coke oven gas containing hydrogen, wherein the coke oven gas is at least partially integrated into a method for producing dimethyl ether in conjunction with a gas containing carbon monoxide and/or carbon dioxide, whereby a DME-containing product gas is formed. At the outset of the method for the formation of dimethyl ether, a ratio of hydrogen to carbon monoxide, weighted with the carbon dioxide concentration (formula (I)), of 0.9 to 1.1 is set, wherein the DME-containing product gas is integrated into a method for converting dimethyl ether to olefins, whereby an olefin-containing product gas is formed, and wherein olefins, in particular ethylene and/or propylene, is/are separated from the olefin-containing product gas by means of separating methods. 

Method for processing coke oven gas

A process for removing impurities, in particular oxides of sulphur (SO) and/or oxides of nitrogen (NO) from oxygen-containing gas streams by scrubbing with at least one washing agent is described. In order to achieve effective gas purification in an economical manner even in the case of so-called large 'oxyfuel' furnaces which operate with oxygen as fuel gas, it is proposed to convert the impurities at an elevated pressure of at least 2 bar with at least one basic constituent of the washing agent into salts and to wash out said impurities as dissolved salts.

Method for removing impurities from gas flows comprising oxygen

The invention relates to a process for the removal of NO and NOfrom an oxygen-containing gas stream, which comprises a scrubbing step in which the gas stream is brought into contact with an ammonia-containing scrubbing solution, NO is oxidized to form NOby means of the oxygen present at a pressure of at least 2 bar and temperatures of from 15&#xb0; C. to 60&#xb0; C. and at least part of the NOpresent in the gas stream is converted by means of the ammonia-containing scrubbing solution into ammonium nitrite and a downstream decomposition step in which the ammonium nitrite present in the scrubbing solution is thermally decomposed into elemental nitrogen and water, where the decomposition step is carried out at temperatures of from 121&#xb0; C. to 190&#xb0; C. and a pressure of from 2 to 40 bar. The invention likewise relates to a plant for operation of the process of the invention.

Process and plant for the removal of nitrogen oxides from oxygen-containing gas streams

The invention relates to a diaphragm pipe for permeative separation of hydrogen from gas mixtures containing hydrogen, a method for the production thereof as well as a reactor comprising a diaphragm pipe, wherein the diaphragm pipe comprises a porous pipe (S) made of a sintered metal and a diaphragm (M) containing palladium or made of palladium enclosing the outer surface of the sintered metal pipe (S). The sintered metal pipe (S) has at least on one end a fitting (F) made of gasproof material, which is firmly connected with the sintered metal pipe (S).

Membrane tube and reactor having a membrane tube

For recovering acetylene from hydrocarbons, the hydrocarbons are thermally cracked in the presence of CO.sub.2 as a diluent gas. Suitable for thermal cracking for acetylene generation is a ratio, by weight, of CO.sub.2 to hydrocarbon, of between 3:1 and 1:3, and preferably between 2:1 and 1:2. It is preferred for the CO.sub.2 to be mixed with the hydrocarbons before thermal cracking which is thereafter conducted at average reaction temperatures of between 800.degree. and 1200.degree. C., preferably between 900.degree. and 1100.degree. C. An average residence time of between 5 and 500 milliseconds (ms) of the hydrocarbons during thermal cracking has proven to be effective. As the hydrocarbon feedstock for the thermal cracking, basically C.sub.2+ alkanes, especially ethane, propane and/or butane, can be used advantageously. After the cracked gas is cooled, higher alkynes are removed from the cracked gas, then the acetylene is separated preferably by scrubbing with an absorption agent selective for acetylene. Recycle streams of hydrocarbons and/or CO.sub.2 for the thermal cracking can contribute to savings and more efficient use of the feedstock.

Process for recovering acetylene from hydrocarbons by thermal cracking

Growing community of inventors

Munich, Germany

Nicole Schodel