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Distillation is a method of separating mixtures based on differences in their volatilities in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction. Commercially, distillation has a number of uses. It is used to separate crude oil into more fractions for specific uses such as transport, power generation, and heating. Water is distilled to remove impurities, such as salt from seawater. Air is distilled to separate its components—notably oxygen, nitrogen, and argon—for industrial use. Distillation of fermented solutions has been used since ancient times to produce distilled beverages with a higher alcohol content. The premises where distillation is carried out, especially distillation of alcohol, are known as a distillery. Early types of distillation were known to the Babylonians in Mesopotamia (in what is now Iraq) from at least the 2nd millennium BC.[1] Archaeological excavations in northwest Pakistan have yielded evidence that the distillation of alcohol was known in Pakistan since 500 BC,[2] but only became common between 150 BC - 350 AD.[2] Distillation was later known to Greek alchemists from the 1st century AD,[3][4][5] and the later development of large-scale distillation apparatus occurred in response to demands for spirits.[3] According to K. B. Hoffmann the earliest mention of "destillatio per descensum" occurs in the writings of Aetius, a Greek physician from the 5th century.[6] Hypatia of Alexandria is credited with having invented an early distillation apparatus,[7] and the first clear description of early apparatus for distillation is given by Zosimos of Panopolis in the fourth century.[5] Primitive tribes of India used a method of distillation for producing Mahuda liquor. This crude and ancient method is not very effective.[8] The invention of highly effective "pure distillation" is credited to Arabic and Persian chemists in the Middle East from the 8th century. They produced distillation processes to isolate and purify chemical substances for industrial purposes such as isolating natural esters (perfumes) and producing pure alcohol.[9] The first among them was Jabir ibn Hayyan (Geber), in the 8th century, who is credited with the invention of numerous chemical apparatus and processes that are still in use today. In particular, his alembic was the first still with retorts which could fully purify chemicals, a precursor to the pot still, and its design has served as inspiration for modern micro-scale distillation apparatus such as the Hickman stillhead.[10] The isolation of ethanol (alcohol) as a pure compound through distillation was first achieved by the Arab chemist Al-Kindi (Alkindus).[11] Petroleum was first distilled by the Persian alchemist Muhammad ibn Zakariya Razi (Rhazes) in the 9th century, for producing kerosene,[12] while steam distillation was invented by Avicenna in the early 11th century, for producing essential oils.[13]
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Distillation Subcategories
Distillation Articles
Origins of Rum
by David Richards
Sep 02, 2006
The precursors to rum date back to antiquity. Development of fermented drinks produced from sugarcane juice is believed to have first occurred either in ancient India or China, and spread from there. An example of such an early drink is brum. P...
Tea Tree Oil
by Ric Wiley
Feb 14, 2006
Tea Tree Oil is one of the most useful products in nature. It has been used by some Aboriginal People in Australia for many centuries as one of their most useful medicines. Tea Tree oil is derived from Melaleuca Alternifloria which is a narrow-...
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