called fusel oil by-product of fermentation.They are contained as an impurity in the crude alcohol and have very unpleasant characteristic smell.They represent an oily liquid, which can have a color from light yellow to reddish-brown.The main component of this substance are alcohols C3-C9, and aldehydes furfunol and fatty acids.Aldehydes and saturated alcohols appear in yeasts metabolize amino acids.The fusel oils present, for example, in beer and in moonshine, and in fairly large quantities.When
homemade drinks with a high alcohol content of these impurities problem is quite acute.Distillation brew is made using special equipment.Pre preparing Braga.Further, it is heated to a high temperature.As a result, begin to stand out alcohol fumes.When cooled last condensed and drains into a prepared vessel.
Distillation is very important to observe the heating mode.Light impurities contained in Braga, begin to boil at a temperature of about 68 degrees.Further, at a temperature of 78 ° C, an intensive evaporation of ethanol.In the subsequent heating to 85 ° C from the initial product actually become prominent undesirable fusel oil.
It is therefore considered that the faster the heating occurs in the moonshine, the effectiveness of its work.When distillation at temperatures up to 78 ° C it turns out the so-called Pervatsch, which contains a lot of harmful light impurities.Receive similar product inside, as well as use it for external use, for example, in lotions, colognes, or, in any case impossible.When reaching the initial product temperature of 78 ° C.necessary to reduce the intensity of the heat.Otherwise, it may be ejected Braga.Upon subsequent heating takes itself very basic process of distillation of moonshine.
At this stage you need to be very careful.First, care must be taken so that the temperature of the mash does not rise over 83 ° C.Otherwise, as mentioned above, it will be allocated from fusel oil.Secondly, at this stage, the evaporation of ethanol, whereby its content gradually decreases in Braga.
eventually in the initial product will be the minimum amount that can be removed only at a higher temperature.However, the quality of brew sharply decrease, because it will increase the content of such harmful substances as fusel oils.Consequently, after reaching a temperature of 85 ° C in the distillation should be stopped.Number ether alcohol vapor can be checked in a simple manner.For this purpose, received moonshine moistened paper and set on fire.If it burns with a blue flame shade, alcohol is still available in sufficient quantities.If the paper does not light up, it means that the amount is small.In this case, the process can be continued only for subsequent mixing with Braga and redistillation.
Subsequently, the resulting brew to remove fallen into his oils can be further purified.This may be used in a variety of methods.The simplest is considered cleansing brew potassium permanganate.For this purpose it is diluted in water beforehand.Per liter of vodka you need about 1-2 grams.The resulting solution was poured into a brew and allowed to stand for 10-12 hours.After clarification and precipitation, the liquid is filtered through cloth.
