Manufacture Of Ethyl Alcohol From Molasses

Manufacture of ethyl alcohol from molasses:

Let me explicate to y'all today manufacture of ethyl alcohol from molasses. In Republic of Republic of India of the ethyl alcohol is prepared from molasses. Molasses is the woman nurture liquor left later on the crystallization of cane saccharide from concentrated juice. It is night coloured thick syrupy mass. Molasses incorporate almost 60% fermentable sugars, by in addition to large sucrose, glucose, in addition to fructose. It forms a bright inexpensive source of industrial ethyl alcohol. Molasses is converted into ethyl alcohol yesteryear the next steps:

Dilution.

Molasses id induce down diluted amongst water. One book of molasses is blended amongst v volumes of water.

Addition of Ammonium Sulphate.

Molasses normally incorporate plenty nitrogenous affair to deed every bit nutrient for yeast during fermentation. If the nitrogen content of the molasses is poor, it may endure fortified amongst ammonium sulphate or ammonium phosphate.

Addition of Sulphuric Acid.

The solution is therefore made acidic amongst a picayune total of sulphuric acid. Acidity is favourable to the increment of yeast but unfavourable to most other bacteria. Care should endure taken to avoid an excess of acid every bit the yeast may endure killed.

Addition of Yeast (Fermentation).

The resulting solution is received inwards a large fermentation tank in addition to yeast is added to it. The mixture is maintained at almost 30ºC for ii or three days. During this menstruation the enzymes invertase in addition to zymase acquaint inwards yeast select almost the conversion of sugars into ethyl alcohol. During the process, the liquor froths owing to the development of carbon dioxide. The fermented liquid is known every bit WASH.

Fractional Distillation of wash.

The launder contains 15-18% ethyl alcohol. It is subjected to fractional distillation inwards a particular column (Fig. 1.1) The column is divided into the set out of compartments yesteryear agency of plates. These plates are provided amongst valves in addition to driblet tubes. Wash is admitted close the top. As it travels downwards the column, it meets the up-coming electrical current of steam. The steam converts ethyl alcohol into vapours. These vapours ascent upwards in addition to are fed into the condenser. The high boiling impurities move downwards the column. The fractional refining of the launder yields three fractions:

FRACTION 1.

The depression boiling fraction is drawn from the caput of the section. It consists of acetaldehyde.

FRACTION 2.

The top dog fraction is drawn close the upwards of the section. It consists of 95% ethyl alcohol. It is sold nether the advert R plain Spirit or Commercial Alcohol.

FRACTION 3.

High boiling fraction (125-140ºC) drawn close the base of operations of the column. It is called Fusel Oil. It consists mainly of amyl alcohol (C5H11OH).