Veg-gasinstituut N.v.

Willem J Van Der Wal

John Wilhelm Geus

Eugene G Kuijpers

Gerard Heijkoop

Rinko B Tjepkema

Process for the removal of sulphur dioxide from gases containing sulphur dioxide and oxygen, in which process these gases are brought into contact with a copper-containing acceptor which contains copper on a thermostable, inert support, the charged acceptor obtained is regenerated by terminating the contact with the gas containing sulphur dioxide and oxygen and thereafter bringing the charged acceptor into contact with a reducing gas, and the regenerated acceptor is again brought into contact with the gas containing sulphur dioxide and oxygen, the acceptor being charged with copper in such a quantity that the weight of copper amounts to more than 8% by weight, calculated as metallic copper and based on the total weight of the acceptor, and the copper is present in such a fine state of subdivision on the thermostable support that, present in its reduced form on the support, it has a specific surface area of more than 50 m.sup.2 per gram of the metallic copper on the support.

Process for the removal of sulfur dioxide from gases

The invention relates to a process for the removal of hydrogen sulfide from gases by passing the gases in the presence of oxygen and steam over a catalytic absorption mass which contains inert porous support materials as support and catalytically active metal sulfides and/or metal oxides for the selective oxidation of hydrogen sulfide to elemental sulfur, the sulfur formed being simultaneously deposited on the absorption mass, and regenerating the charged catalytic absorption mass.

Process for the removal of hydrogen sulfide from gases

Reaction mass containing mixed oxides of iron with one or more metals of groups IV to VII of the periodic table of the elements, wherein the mixed oxides are deposited in finely divided form on an inert refractory substrate with a high specific surface area. The invention also relates to methods for the manufacture of this reaction mass as well as the use thereof as a catalyst for the shift reaction of carbon monoxide with steam, forming carbon dioxide and hydrogen at an elevated temperature, and/or the removal of sulphur compounds from gases.

Reaction mass, method for the manufacture thereof and use thereof

Process for the reaction of carbon monoxide with steam, with formation of carbon dioxide and hydrogen at elevated temperature in the presence of iron-containing catalysts (shift reaction), in which a catalyst is used, which contains finely divided iron oxide on an inert, thermostable carrier having a high specific surface.

Process for the reaction of carbon monoxide with steam, with formation

Process for removal of sulfur compounds from gases by passing the gases over an absorption mass which, on an inert support having a specific surface area of more than 10 m.sup.2 per g, contains metal oxides which react with hydrogen sulfide to give metal-sulfur compounds and at least 20% by weight of which metal oxides are present in finely divided form with a particle size of less than 40 nm. The gases are passed at a temperature of 5.degree. to 800.degree. C. over the support loaded with metal oxide, and the resultant support loaded with metal-sulfur compounds is regenerated by passing gases containing oxidizing agents over it.

Process for removal of sulfur compounds from gases

Process for the preparation of an iron(III) oxide catalyst or absorbent, in which the iron is precipitated from an iron salt solution by means of hydroxyl ions in the presence of a carrier, the charged carrier is dried and optionally calcined and optionally reduced, a solution of an iron(III) salt being introduced with vigorous stirring below the surface of the suspension of the carrier, the pH of the suspension is maintained between 4 and 7 and the charged carrier is separated from the solution.

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Utrecht, Netherlands

Willem J Van Der Wal