In ordinary inorganic chemistry, zinc chloride can be prepared by reacting hydrochloric acid and zinc particles: Zn+2HCl==ZnCl2+H2↑, while the prepared zinc chloride usually contains water and the main hydrolysate: zinc oxychloride (Zinc oxychloride). Purification is generally carried out by the following steps: adding 100 g of zinc chloride to 800 mL of dioxane and heating for fractional distillation. Filter it while it is hot to remove the zinc powder. After cooling, the zinc chloride turns into a white precipitate. Anhydrous zinc chloride can first be heated and sublimated in a stream of hydrogen chloride, and then heated to 400°C in a stream of dry nitrogen. The sample can also be treated with thionyl chloride. To prepare anhydrous zinc chloride, hydrogen chloride gas can react with zinc. Zinc chloride can also be obtained by burning zinc in chlorine gas.