Research of Water-Alcohol Solution Permittivity at Phase Transition by Radiophysics Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1040.356 ◽

2014 ◽

Vol 1040 ◽

pp. 356-359

Author(s):

T.D. Kochetkova ◽

A.A. Pavlova

Keyword(s):

Phase Transition ◽

Complex Permittivity ◽

Alcohol Solution ◽

Solution Phase ◽

Frequency Range ◽

Ethanol Content ◽

Varied Temperature ◽

Water Alcohol Solutions ◽

Water Alcohol

This study presents the research of water-alcohol solution phase transition by permittivity changing. Complex permittivity was measured by open-end-coaxial method in frequency range 500 MHz – 40 GHz. We varied temperature from 240 K to 310 K and ethanol content from 10 % to 80 %. Temperature dependencies of permittivity for water-alcohol solutions were obtained and the patterns of variation of those solidification temperatures were established.

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RESEARCH OF MINERAL ADSORBENTS APPLICATION FOR WATER-ALCOHOL SOLUTIONS PURIFICATION IN TECHNOLOGY OF ALCOHOLIC BEVERAGES

EUREKA Physics and Engineering ◽

10.21303/2461-4262.2017.00397 ◽

2017 ◽

Vol 4 ◽

pp. 3-10

Author(s):

Lolita Marynchenko ◽

Viktor Marynchenko ◽

Mariana Hyvel

Keyword(s):

Ethyl Acetate ◽

Alcohol Solution ◽

Economic Feasibility ◽

Alcoholic Beverages ◽

Active Coal ◽

Rectification Factor ◽

Mineral Adsorbents ◽

Water Alcohol Solutions ◽

Water Alcohol ◽

Purification Of Water

The possibility of using natural mineral adsorbents - clinoptilolite and schungite - in the adsorption purification of water-alcohol solutions of different concentrations was studied using the example of impurities of ethanol of acetaldehyde and ethyl acetate. The feasibility of studying the above-mentioned minerals for the adsorption of simple organic substances is justified. The best concentration of a water-alcohol solution for adsorption of acetaldehyde 80-85 vol.%, ethyl acetate-40 vol.% is experimentally established. The rational duration of phase contact for adsorption of acetaldehyde is from 10 to 20 minutes, for adsorption of ethyl acetate - 5 minutes. An explanation for the dependence of the sorption efficiency on the ethanol content in a water-alcohol solution is proposed based on the known dependencies of the rectification factor on the ethanol concentration. The larger the rectification factor, the less the hydrogen bond of this impurity with ethanol and the easier it is to sorb it from ethanol by mineral adsorbents. The practical and economic feasibility of using the mineral adsorbent clinoptilolite of Ukrainian origin in the preparation of alcoholic beverages instead of imported active coal is shown. It is determined that to purify water-alcohol solutions from aldehydes, which most worsen the taste of alcoholic beverages, it is more expedient to use clinoptilolite as an adsorbent. It is shown that the use of clinoptilolite for the preparation of vodkas from non-standard rectified alcohol will improve the tasting indicators of the final product.

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