Pankiewicz U., Jamroz J. (2013): Evaluation of physicochemical and sensory properties of ethanol blended with pear nectar. Czech J. Food Sci., 31: 66-71.Ten trained panelists evaluated the perceived density as well as the physical and perceived viscosities of the product obtained by blending ethanol with pear nectar. There was a link between the concentrations of ethanol in pure vodka and in its blend with the nectar, and the perceived sensory viscosity and the drink density. There was a very good (r 2 = 0.9442) and poor (r 2 = 0.6464) correlation, respectively, between the experimentally found density and viscosity and the perceived viscosity of aqueous ethanol. These properties of aqueous ethanol and alcohol pear drinks correlated very well (r 2 = 0.9430 and 0.9774) with one another. 50% ethanol with the nectar had a density similar to that of aqueous ethanol solution taken as the standard. The admixture of the pear nectar increased the sensory sensitivity of the viscosity measurements of these solutions. The correlation between the perceived and physical viscosities could be used as a guide for the sensory and qualitative control of vodkas.
The paper presents a project of a rectification column working periodically for the production of ethyl alcohol. The project contains an assumption of a steady concentration of the distillate. Thee range of change in the reflux from 1.7 to 13 required to obtain that concentration was calculated. With 50 litres of feed containing 9 mol % ethanol, about 10 litres of distillate was obtained, which has 70 mol % ethanol. Ceramic Raschig rings with a diameter of 15 mm, which, in a column, occupy a height of 0.5 m, were used. The height of the entire column was 0.67 m.Keywords: rectification column, ethanol, heat balance column Streszczenie W artykule przedstawiono projekt kolumny rektyfikacyjnej pracującej okresowo do otrzymywania alkoholu etylowego. W projekcie założono stałe stężenie destylatu i wyznaczono zakres zmiany liczby powrotu od 1,7 do 13, konieczny do jego otrzymania. Z 50 litrów surówki zawierającej 9% mol. etanolu uzyskano ok. 10 litrów destylatu o stężeniu 70% mol. Jako wypełnienie zastosowano ceramiczne pierścienie Raschiga o średnicy 15 mm, które zajmują w kolumnie wysokość 0,5 m. Natomiast wysokość całej kolumny, jest równa 0,67 m.Słowa kluczowe: kolumna rektyfikacyjna, etanol, bilans ciepła kolumny
The paper presents the introduction to problems related to the distilling industry in Poland and its current situation. The theoretical issues related to the production of ethyl alcohol are discussed. The raw materials used and their impact on production efficiency, process steps and their conditions and quality requirements for alcoholic beverages based on ethanol are characterised. The main causes of the problem of distillery in Poland are seen in the import of cheap rectified and dehydrated spirits from other EU countries, which results in a fall in market prices that do not provide for reimbursement of production costs and increase of excise duty in 2014, which significantly contributed to the closure of the distillery. At present, there are around 100 of them in the country, most of which are made of distillates for bio ethanol production.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.