| 摘要 |
The invention provides an iron sulfide characterized in that it comprises FeS2, Fe1-XS, Fe3O4 and FeSO4, and that the secondary particles thereof, have a 50% volume-cumulative particle diameter of from 20 to 300 mum. The invention also provides a process for producing an iron sulfide comprising the steps of introducing (a) ferrous sulfate monohydrate having a d50 of from 20 to 300 mum and (b) not less than stoichiometric amount of at least one sulfur compound selected from elemental sulfur and hydrogen sulfide into the fluidized bed of a furnace and then fluidizing, burning, and reacting the ingredients at a temperature of from 350 to less than 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. The present invention is useful, for example, in a process of coal liquefaction or heavy-oil hydrocracking. |
