PROCESS FOR PREPARING A PRODUCT FROM SULFUR-CONTAINING CEMENT

摘要

The invention provides a process for preparing a product from sulfur-containing cement comprising the following steps: (a) selective oxidising hydrogen sulphide to elemental sulphur by contacting, in a reaction zone, a hydrogen sulphide containing gas raw material and a molecular-oxygen containing gas with a particulate oxidation catalyst under selective oxidation conditions; (b) discharging a stream comprising liquid and/or solid elemental sulphur and the particulate oxidation catalyst from the reaction zone; (c) admixing the stream comprising elemental sulphur and the particulate oxidation catalyst with at least one of the following materials: elemental sulphur, a sulfur-containing cement filler, a sulfur-containing cement modifier, or an aggregate at a temperature at which sulphur is molten; (d) solidifying the mixture obtained in the step (c) by cooling it to a temperature below the melting temperature of sulphur to obtain the product from sulfur-containing cement. The invention further provides the use of the stream obtained in the selective oxidation step (a) of such process, comprising elemental sulphur and the particulate oxidation catalyst for preparing the product from sulfur-containing cement.