Iron sulfide and process for producing the same

Details Iron sulfide and process for producing the same Iron sulfide and process for producing the same

C - Chemistry, Metallurgy

01

G

C01G 49/12 (2006.01) B01J 27/043 (2006.01) C10G 1/08 (2006.01)

Patent

CA 2221920

The invention relates to an iron sulfide characterized in that it comprises from 85 to 100 wt% FeS2, from 5 to 0 wt% Fe1-X S (X: 0 to 0. 2), from 5 to 0 wt% Fe3O4 and from 10 to 0 wt% FeSO4 as determined by X-ray diffractometry, and that the secondary particles thereof each made up of primary particles having a particle diameter of from 10 to 400 nm have a 50% volume-cumulative particle diameter of from 20 to 300 µm. The invention also relates to a process for producing an iron sulfide characterized by comprising the steps of introducing (a) an iron sulfate comprising, as a main component, ferrous sulfate monohydrate having a d50 of from 20 to 300 µm and (b) not less than stoichiometric amount of at least one sulfur compound selected from elemental sulfur in a powder, melt or vapor state and hydrogen sulfide into the fluidized bed of a fluidized burning furnace and then fluidizing, burning, and reacting the ingredients at a temperature of from 350 to 630°C, excluding 630°C, a superficial velocity of 0.1 m/sec or higher, and a pressure of 1 atm or higher using air as a fluidizing gas for utilizing sulfur combustion to supply heat necessary for maintaining the reaction temperature. The iron disulfide yielded has a high purity and is in a granular form having excellent handleability. It can be reduced into submicron particles by a simple disaggregating operation. The fine particles, when used, e.g., as a catalyst for coal liquefaction, exhibit high activity in hydrogenation reaction to enable high-yield oil production from coal. The acid gas generating in the production is recovered as sulfuric acid and elemental sulfur respectively through oxidation and reduction. The sulfuric acid can be used for producing iron sulfate together with scrap iron or the like. Thus, a non-polluting resource-saving production process is possible in which by-products are reused as starting materials.

L'invention concerne des sulfures de fer qui se composent de 85-100 % de FeS2, 5-0 % de Fe1-xS (x étant compris entre 0 et 0,2), 5-0 % de Fe3O4, et 10-0 % de FeSO4, en poids, selon la diffractométrie par rayons X. Dans ces sulfures, le diamètre moyen des particules secondaires formées à partir des particules primaires de 10-400 nm de diamètre, est compris entre 20 et 300 mu m dans la courbe de répartition cumulative volume-base. L'invention concerne aussi un procédé de production de sulfures de fer. Ce procédé consiste à amener des sulfates de fer (a) comprenant essentiellement du monohydrate de sulfate ferreux avec un diamètre moyen de 20-300 mu m et au moins un composé de soufre (b) sélectionné parmi des soufres et des sulfures d'hydrogènes élémentaires pulvérulents, fondus et vaporeux, au moins en une quantité de réaction équivalente, dans le lit fluidisé d'un fourneau de chauffage à lit fluidisé; et ensuite faire intervenir une réaction de chauffage du lit fluidisé à une température comprise entre 350 et 630 DEG C au plus, et une vitesse de surface de 0,1m/s, ou plus sous pression atmosphérique ou plus, ou à l'aide de l'air destiné à fournir la chaleur nécessaire pour maintenir la température de réaction par combustion du soufre comme gaz de fluidisation.

Affiliated with

Also associated with

Rating

Iron sulfide and process for producing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Iron sulfide and process for producing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron sulfide and process for producing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1410369