Grain fusel oils

PROP Colorless to pale-yeUow liquid odorless. D 0.807-0.813, reft index 1.405-1.410. Composition of grain fusel oil is methanol, ethanol, acetaldehyde, and other alcohols (ARGEAR 33,49,69). 

Feints. Feints are the third fraction of the distiUation cycle derived from the distiUation of low wines in a pot stiU. This scotch term is also used to describe the undesirable constituents of the wash that are removed during the distiUation of grain whiskey in a continuous patent stiU (Coffey). These are mostiy aldehydes and fusel oils. 

Kora-fuselol, n. fusel oil from grain, -gefuge,... 

In the case of neutral spirits, the intention is to optimally purify the distillate and therefore separate aromatic components, such as fermentation by-products (fusel oils), as much as possible and to ideally obtain absolutely neutral ethyl alcohol. Today s most common raw materials for the production of beverage alcohol are potatoes, grain and molasses. For the fermentation, so-called distillers yeasts, in particular top-fermenting yeast types are used. Since the measures are not sterile and increased temperatures accelerate the fermentation process, the yeast strains must provide good fermentation capabilities such as high resistency against alcohol, acidity and increased temperatures. 

The presence ol water nmy be detected by its Hpccilic gravity. Fusel oil may bo detected by adding a little of a mtlutiou of nitrate of silver to the alcohol. Dissolve 10 grains nitrate of silver in 1 ounce of pare dis-liliod water. Then take half a tumblorful of... 

The isoprene obtained in this way polymerizes to rubber when heated with catalytic agents such as acids, alkalies, or metallic sodium. The fact that fusel oil is obtained only in small quantities as a by-product in the manufacture of grain alcohol by fermentation, makes this method of preparing rubber of no technical interest. 

Whiskey is prepared from fermented grain. The malt which is used, is dried over an open fire, and, consequently, acquires a characteristic flavor, which is transmitted to the whisky. After fermentation, the product is distilled from a still of copper, and the distillate condensed in a worm. Redistillation yields a spirit which is diluted with enough water to make a solution which contains 50 to 58 per cent alcohol. The quantity of alcohol is usually stated in the United States in the per cent alcohol by volume as taxes are levied on that basis. The percentages given here refer to the volume standard. The crude whisky is stored in barrels of wood and allowed to age until the flavor of the fusel oil disappears. 

Fusel oil (8013-75-0) is a mixture of the eight possible isomers of amyl alcohol and smaller amounts of other alcohols resulting from the fermentation of certain carbohydrates including grains and potatoes, hence fermentation amyl alcohol (123-51-3) which is principally 3-methyl-l-butanol. Fusel oil is a widely used solvent. 

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