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Philippe Renault, Andre Deschamps, Claude Dezael: Process for manufacturing sulfur from a solution of sodium sulfite. Institut Francaise du Petrole des Carburants et Lubrifiants, Millen Raptes & White, June 29, 1976: US03966891 (3 worldwide citation)

A solution of sodium sulfite or sulfide is reacted with ammonium sulfate, so as to produce a gas containing SO.sub.2 or H.sub.2 S, NH.sub.3 and H.sub.2 O, which is thereafter treated for sulfur production and NH.sub.3 recovery, and a liquid outflow containing sodium sulfate which is reacted with CO. ...


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Philippe Renault, Andre Deschamps, Claude Dezael: Process for purifying industrial gases containing hydrogen sulfide with sulfur production. Institut Francais du Petrole des Carburants et Lubrifiants, Millen Raptes & White, June 8, 1976: US03962410 (3 worldwide citation)

Process for purifying industrial gases containing hydrogen sulfide and for simultaneously producing elemental sulfur, comprising contacting said gases with an aqueous solution of sodium hydroxide and/or sodium carbonate, thereby forming a sodium sulfide solution, contacting said solution with an aqu ...


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Henri Gruhier, Andre Deschamps, Philippe Renault: Catalytic conversion of an ammonium sulfate to sulfur dioxide and ammonia. Institut Francais du Petrole, Millen & White, March 28, 1978: US04081515 (3 worldwide citation)

Molten ammonium sulfate is converted to ammonia and sulfur dioxide by heating in the presence of at least one molybdenum and/or tungsten compound, preferably at a temperature in the range of 350.degree. to 500.degree. C.


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Andre Deschamps, Sigismond Franckowiak: Process for converting a carbonaceous material to lower paraffinic hydrocarbons and monocyclic aromatic hydrocarbons. Institut Francais du Petrole, Millen & White, May 28, 1985: US04519895 (2 worldwide citation)

A carbonaceous material is subjected, in admixture with a hydrogenated recycle oil, to hydrogenation in two successive steps at respective temperature ranges of 350.degree.-470.degree. C. and 600.degree.-1000.degree. C., under a pressure of at least 20 bars, the resulting product being separated int ...


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Claude Dezael, Andre Deschamps, Sigismond Franckowiak: Process for regenerating brines containing sodium sulfites and sulfates. Institut Francais du Petrole, Millen & White, August 14, 1979: US04164543 (2 worldwide citation)

Process for regenerating brines containing simultaneously sodium sulfites and sulfates so as to produce sulfur dioxide and an alkaline solution usable for absorbing sulfur dioxide, comprising contacting the brine with ammonium bisulfate, sodium bisulfate and ammonium sulfite to produce sulfur dioxid ...


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Claude Dezael, Philippe Renault, Andre Deschamps: Process for reducing molten ammonium sulfates containing metallic impurities to ammonia and sulfur dioxide. Institut Francais du Petrole des Carburants et Lubricants et Enterprise de Recherches et d Activities Petroliers Elf, Millen & White, June 14, 1977: US04029745 (2 worldwide citation)

Molten ammonium sulfates containing iron sulfate as an impurity may be reduced with sulfur or a sulfur compound over long periods provided a fraction of these impure ammonium sulfates is withdrawn, treated for iron removal and fed back to the reduction zone.


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Andre Sugier, Philippe Courty, Andre Deschamps, Henri Gruhier: Catalyst for oxidizing sulfur or sulfur compounds. Institut Francais du Petrole, Millen & White, April 10, 1979: US04148760 (2 worldwide citation)

Sulfur and oxidizable sulfur compound are oxidized in gas phase in the presence of a catalyst comprising vanadium oxide, iron oxide and aluminous cement. Silver and titanium oxide may also be present.


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Andre Deschamps, Claude Dezael, Henri Gruhier, Philippe Renault: Process for purifying a sulfur dioxide containing gas with production of elemental sulfur. Institut Francais du Petrole, Millen & White, November 13, 1979: US04174383 (1 worldwide citation)

Process for purifying SO.sub.2 -containing gas comprising a first step of contacting said gas with an aqueous solution of an ammonium sulfite or an ammonium thiosulfate also containing ammonium sulfate, a second step of contacting the resulting solution with a H.sub.2 S-containing gas at 20.degree.- ...


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Andre Deschamps, Sigismond Franckowiak, Serge Leporq: Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulfur. Institut Francais du Petrole, Millen & White, November 1, 1988: US04781903 (1 worldwide citation)

The invention relates to a process for removing sulfur oxides, particularly sulfur dioxide, contained in gases such as industrial fumes, characterized in that the gas is contacted with a solid absorbent containing magnesium oxide, in such conditions that sulfur oxides are fixed mainly as magnesium s ...