A distilled beverage is a beverage containing ethanol that has been purified by distillation. The concentrated acid can be purified by distillation. The extracted oil can then be purified and, if required, refined or chemically altered. Following extraction, the product can be purified by flash chromatography. This material can be purified by recrystallization from diethyl ether. It is also useful for determining the tertiary structure and quaternary structure of purified proteins. Once prepared, a solution of CuCl may be purified by crystallization. The crude iron pentacarbonyl is purified by distillation. For low boiling azeotropes, the volatile component cannot be fully purified by distillation. The process also produces water and oxygenated hydrocarbons which are then purified and marketed. Once formed, the compound can be purified by sublimation or distillation. The crude ethylbenzene/styrene product is then purified by distillation. It was purified from bovine lung in 1964. It is then purified by crystallization. The anhydrous compound can be purified by sublimation in vacuum.