Rheinische Braunkohlenwerke Ag

Friedrich F Behr

Rudolf Schulten

The invention comprises a recirculatory process for producing hydrocarbons and oxygen in which sulphur dioxide is reacted with iodine and water to form a hydrogen polyiode or a hydrate thereof and sulphuric acid, the sulphuric acid is separated and thermally decomposed to form water sulphur dioxide and oxygen, the polyiodide or its hydrate is decomposed to form iodine and gaseous hydrogen iodide which is concurrently or separately reacted with a carbon oxide or mixture of carbon oxides to form hydrocarbons especially methane and water, the hydrocarbons and water being removed from the system and the remaining reaction products recirculated.

Thermochemical process for producing methane and oxygen from carbon

The invention comprises a recirculatory process for producing methane and oxygen in which iodine and an oxide in a lower valency stage are reacted with methanol, dimethylether or a mixture thereof at an elevated temperature to form the corresponding oxide having a higher valency stage and methyl iodide, the methyl iodide is reacted with water to form hydrogen iodide and reform the methanol and/or dimethylether, the hydrogen iodide is reacted with carbon dioxide to form methane and water and the oxide in the higher valency state is decomposed to release oxygen and reform the oxide having a lower valency stage, the methane and released oxygen are removed and the remaining components are recirculated.

Thermochemical process for producing methane and oxygen

In a process for the electrolytic production of sulfuric acid by oxidation of sulfur dioxide in the presence of water in an anode compartment of an electrolysis cell and of hydrogen in the cathode compartment of the cell, the cathode compartment containing aqueous sulfuric acid as catholyte and being separated from the anode compartment by a hydrogen-ion transfer permitting membrane, the improvement which comprises introducing sulfur dioxide, water and hydrogen iodide or iodine, removing a mixture of aqueous sulfuric acid and hydrogen iodide from the anode compartment, separating the sulfuric acid from the mixture, and removing from the cathode compartment the hydrogen set free therein. The process gives a substantially lower overvoltage than prior art processes.

Process for the preparation of sulfuric acid from sulphur dioxide

In a thermochemical circulation process, hydrogen and oxygen are obtained from water wherein sulfuric acid and the paraffin hydrocarbon corresponding to the olefin used are formed from water, sulfur dioxide and a low-molecular weight olefin, particularly ethylene; the sulfuric acid is decomposed into water, sulfur dioxide and oxygen; the paraffin hydrocarbon is decomposed into the corresponding olefin and hydrogen; and after the removal of the hydrogen and oxygen, the remaining separation products are recycled into the first reaction.

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Gross-Denkte, Germany

Friedrich F Behr