The way the pickup faction parent ethanol

 

(57) Abstract:

The invention relates to the alcohol industry. The method provides for the flow in the upper part of the upper head of the column fractions of ethyl alcohol, in the lower part of the heating steam, enter the water below the feed to the distillation head of fraction of ethyl alcohol, the selection of the concentrate of the lead fraction in distillate methyl alcohol in a mixture with esters and aldehydes. Conduct additional sampling concentrate head fraction from the zone immediately above the injection zone water. From the bottom of the column selected water-alcohol liquid in the form of the cubic product. The input of water is carried out in the lower area of the evaporating device, and the additional selection concentrate head of the faction lead from the liquid phase. The invention will improve the efficiency of purification from impurities head of fraction of ethyl alcohol. 1 Il.

The invention relates to the alcohol industry, more specifically to a method of processing the parent ethanol fraction.

A method of refining the head of fraction of ethyl alcohol, whereby the head fraction of ethanol in the presence of water dispersed concentrate on the head of a faction, which is selected in unasul processing in order to obtain rectified alcohol. When this water is pre-mixed with phlegm and served in the upper zone of acceleration (SU 309042 Installation for separation of ethanol from afuraldehyde faction, B. I., 1971, 22).

Also known is a method of processing the parent ethanol fraction, which in the presence of water dispersed in the concentrate fraction of the head taken in the form of distillate and aqueous-alcoholic liquid that is taken in the form of the cubic product and sent for further processing in order to obtain rectified alcohol. When this water is injected directly into the upper area of the evaporating device (SU 457724 continuous action to obtain rectified alcohol of afuraldehyde faction. B. I., 1975, 3).

The described method does not allow to derive a significant portion of the methanol present in the original parent ethanol fraction, because the height of the column is set to the concentration of ethanol is about 10 vol.%, in which the ratio of the distillation of methanol is significantly less than unity, and methanol almost completely in the CBM product.

Closest to the claimed method is the pickup head of fraction of ethyl alcohol, which provides for the filing in veranda following submission to justify the head of fraction of ethyl alcohol.

Make the selection of the concentrate of the lead fraction in distillate methyl alcohol in a mixture with esters and aldehydes. Produce additional selection concentrate head fraction from the zone immediately above the injection zone water. From the bottom of the column selected water-alcohol liquid in the form of the cubic product (see EN 2122458 C1, 27.11.1998).

The disadvantage of this method is that the method does not provide the selection of impurities intermediate character, which reduces the overall efficiency of purification from admixtures water-alcohol liquid.

The technical result of the claimed invention is to increase the degree of refinement of the head of fraction of ethyl alcohol.

In the claimed invention created conditions for the isolation of intermediate compounds (such as n-propanol, Isobutanol, isoamyl and others).

The technical result is achieved due to the fact that the way the pickup head of fraction of ethyl alcohol, which flow in the upper part of the upper head of the column fractions of ethyl alcohol, in the lower part of the heating steam, enter the water below the feed to the distillation head of fraction of ethyl alcohol, the selection of the concentrate of the head of the faction in view of the action from the zone, directly above the injection zone water sample from the bottom of the column of water-alcohol liquid in the form of the cubic product, the input water is carried out in the lower area of the evaporating device, and the additional selection concentrate head of the faction lead from the liquid phase.

The drawing shows the setup diagram for implementing the method of the pickup head of fraction of ethyl alcohol.

The installation includes spreader 1 column, the reflux condenser 2 and the condenser 3.

The inventive method is carried out as follows.

Faction head ethyl alcohol is served in the upper zone upper stage of the column 1. In the lower part of the upper column 1 serves the heating steam. In the bottom area of the upper column 1 enter the water. A pair of upper stage of the column 1 is sent to the reflux condenser 2 and the condenser 3. From the condenser 3 are selected concentrate head of the faction, and the phlegm from the reflux condenser 2 and the condenser 3 return overclocking-1 column.

From the upper zone of the column 1 which is directly above the injection zone water, optionally selected from a liquid phase concentrate head of the faction.

From the bottom of the upper column 1 select CBM product, i.e., purified from admixtures water-SP is the number of 877 kg/h served in the upper zone of the column 1.

In the lower zone of the column 1 enter the water in an amount 8121 kg/h In the lower part of the column 1 serves the heating steam in a quantity of 2500 kg/h

A pair of column 1 in the amount of 4355,1 kg/h is sent to the reflux condenser 2 and the condenser 3. From the condenser 3 are selected concentrate head of the faction in the number of 60.5 kg/h, and the phlegm from the reflux condenser 2 and the condenser 3 in the amount of 4294,6 kg/h return in column 1.

From the zone of the column 1 which is directly above the injection zone water, optionally selected from a liquid phase 22.7 kg/h of concentrate head of the faction.

From the bottom of column 1 select 11414,8 kg/h cubic product is purified from the bulk of impurities aqueous-alcoholic liquid.

The input of water in the bottom area of the pickup (lower supply of distilled fractions parent ethanol) provides the conditions for separation and concentration of methyl alcohol is one of the most undesirable impurities rectified alcohol. This input of water creates conditions for high concentrations of ethanol above the zone of water input, which in turn provides the conditions under which the ratio of rectification of methyl alcohol is always greater than unity. Thus methyl alcohol passes into the distillate, i.e., at the end of the and, concentrate and other impurities, for which the coefficient of rectification in concentrated aqueous alcoholic solutions greater than one (diethyl ether, acetaldehyde, formic-ethyl ether, acrolein, and others).

In the zone below the water input, the conditions under which virtually all impurities alcohol factor rectification is greater than 1 (n-propanol, ISO-butanol, isoamyl, exploitability ether, isovalerianic ether and others).

Therefore, directly above the injection zone water will be located area of the local concentration of the above impurity, which is encouraged to take the concentrate of the parent faction. This technique provides better cleaning of the cubic product - water-alcohol liquid, which is sent for further processing.

The way the pickup head of fraction of ethyl alcohol, which flow in the upper part of the upper head of the column fractions of ethyl alcohol, in the lower part of the heating steam, enter the water below the feed to the distillation head of fraction of ethyl alcohol, the selection of the concentrate of the lead fraction in distillate methyl alcohol in a mixture with esters and aldehydes, additional selection Konz is Ronny aqueous-alcoholic liquid in the form of the cubic product, characterized in that the input of water is carried out in the lower area of the evaporating device, and the additional selection concentrate head of the faction lead from the liquid phase.

 

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