Process of recovering elementary sulfur from gases which have a high carbon dioxide content and contain sulfur compounds and impurities
Номер патента: CA1037225A
Опубликовано: 29-08-1978
Автор(ы): Karl Bratzler, Karl-Heinz Eisenlohr
Принадлежит: Metallgesellschaft AG
Опубликовано: 29-08-1978
Автор(ы): Karl Bratzler, Karl-Heinz Eisenlohr
Принадлежит: Metallgesellschaft AG
Реферат: ABSTRACT OF THE DISCLOSURE: A process of recovering elementary sulfur from gases which have a high carbon dioxide content and contain inorganic and/or organic sulfur compounds, unsaturated hydrocarbons, hydrogen cyanide and other impurities, characterized in that a combustion-promoting gas is added to the gases, the resulting mixture is burnt with a slight excess of air, the resulting gas is caused to flow in contact with coke at temperatures of 300-450° to remove residual oxygen, sulfur trioxide, and nitrogen oxides, the prepurified gas is cooled to a temperature of 20-80°C and is then subjected in one or two stages to counterflow scrubbing with an aqueous absorbent solution to remove sulfur dioxide, the laden absorbent solution is heated and stripped with gases or water vapor to strip off the sulfur dioxide, the stripped-off sulfur dioxide is cooled, excess hydrogen is added thereto, and the mixture is hydrogenated at temperatures of 200-450°C on a catalyst to form sulfur and/or hydrogen sulfide, resulting elementary sulfur is removed by cooling, sulfur dioxide in a stoichiometric proportion is added, if required, to hydrogen sulfide which has been formed, the mixture is reacted at tempera-tures of 200-300°C in contact with a catalyst consisting of alumina or activated carbon to form elementary sulfur, which is recovered by cooling, and all or part of the resulting exhaust gas is recycled to the process.
Method of isolating sulfur from hydrogen sulfide-containing gas
Номер патента: RU2070086C1. Автор: Штетцер Клаус,Рольке Дитрих,Корнел Петер,Лелл Райнер,Нойрот Габриэле. Владелец: Металлгезелльшафт АГ. Дата публикации: 1996-12-10.