INTEGRATED PROCESS FOR PRODUCING CALCIUM SULFATE AND METHANOL

摘要

A process for producing calcium sulfate involves reacting sulfur or hydrogen sulfide with calcium carbonate under anhydrous conditions in the presence of a source of oxygen at a temperature of 200°C or greater. The process for producing calcium sulfate may be integrated into a process that also produces methanol involving desulfurizing a sulfur-contaminated hydrocarbon mixture to obtain hydrogen sulfide and a desulfurized hydrocarbon mixture, reacting the hydrogen sulfide or elemental sulfur obtained from the hydrogen sulfide with calcium carbonate under anhydrous conditions in the presence of an oxygen source at a temperature of 200°C or greater to obtain calcium sulfate and carbon dioxide, and converting the carbon dioxide to methanol. The integrated process permits desulfurization and enhancement of a fuel (e.g. jet fuel) using fewer external inputs by recycling reaction products produced at each step of the process.