Bayer Aktiengesellschaft

Bayer Intellectual Property Gmbh

Bayer Technology Services Gmbh

Chemetics Inc.

Martin Kürten

Martin Schweitzer

Kurt-Wilhelm Eichenhofer

Thomas Runowski

Bernd Erkes

Dieter Förtsch

Torsten Weber

Verena Haverkamp

Klaus-Peter Grabowski

Günter Dräger

Frank Risse

Arnold Newrzella

Tim Predel

The present invention relates to a process and a device for the combustion of sulphur and/or sulphur-containing compounds, via which a sufficient production of SO-containing gases having a high SOconcentration is made possible. The combustion preferably proceeds using a combustion gas which has an oxygen fraction at least as high as air, but preferably a higher fraction of oxygen. The process and the device should be suitable, in particular, for providing sulphur dioxide as a source for further production of sulphuric acid or highly concentrated SO-containing gases. In addition, the device and the process should be suitable for oxidizing hydrogen-sulphide-containing gases, such as occur, for example, in the refinery industry, in high concentrations to SO.

Device and method for the combustion of sulfur and sulfur-containing compounds

Process for the continuous catalytic complete or partial oxidation of a starting gas containing from 0.1 to 66% by volume of sulphur dioxide plus oxygen, in which the catalyst is kept active by means of pseudoisothermal process conditions with introduction or removal of energy; apparatus for the continuous catalytic complete or partial oxidation of a starting gas containing sulphur dioxide and oxygen having at least one tube contact apparatus in the form of an upright heat exchanger composed of at least one double-walled tube whose catalyst-filled inner tube forms a reaction tube, with heat being transferred in cocurrent around the reaction tube and an absorber for separating off SOdownstream of the tube contact apparatus; the reactivity of the catalyst being preset by mixing with inert material.

[object Object]

The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SOand/or sulphuric acid of a concentration of 94 to 100% by weight of HSOby combustion of sulphur with atmospheric oxygen according to the principle of superstoichiometric combustion, cooling the resultant sulphur-dioxide-containing gases to 350&#xb0; C. to 500&#xb0; C., catalytic conversion of these cooled gases to give sulphur-trioxide-containing gases in the presence of a vanadium-containing catalyst using single or double contact catalysis, absorption of the sulphur-trioxide-containing gases after cooling, if appropriate removal of liquids from the gases after absorption and energy recovery, with liquid sulphur being injected into the hot combustion gas stream perpendicular to the main direction of flow in the form of a fan using one or more bimodal fan-type nozzles.

Process for the combustion of sulphur for the preparation of oleum and sulphuric acid with reduced (NO)x content

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Bergisch Gladbach, Germany

Martin Kürten