Over the past decade, several alternative approaches have been explored to overcome the high-energy consumption of dehydration and the unfavourable continuous operation of the autoclave process to produce calcium sulfate hemihydrate at lower temperatures with reduced waste heat. Many of these methods are based on "wet" dehydration of gypsum or direct precipitation from mixed solutions containing calcium and sulfate, combined with a mixture of salt/acid , alcohol/water , or additives . Other approaches include solvent-assisted grinding of gypsum and a solvothermal route using amorphous Ca-ethoxide as a precursor . While some of these methods show promise in reducing energy consumption and waste heat, they often rely on expensive additives, the use of large quantities of organic solvents or the need for extensive milling times. These factors limit their widespread application in industrial settings. Therefore, further research is warranted to find alternative approaches that strike a balance between efficiency, cost-effectiveness, and environmental sustainability in the production of calcium sulfate hemihydrate on a larger scale.