Computer Simulation Applied to Studying Continuous Spirit Distillation and Product Quality Control
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Identification of the Enzymatic Mechanism of Nitroglycerin Bioactivation
Identification of the enzymatic mechanism of nitroglycerin bioactivation Zhiqiang Chen*†, Jian Zhang†, and Jonathan S. Stamler*†‡§ *Howard Hughes Medical Institute, Departments of †Medicine and §Biochemistry, Duke University Medical Center, Durham, NC 27710 Communicated by Irwin Fridovich, Duke University Medical Center, Durham, NC, April 15, 2002 (received for review March 26, 2002) Nitroglycerin (glyceryl trinitrate, GTN), originally manufactured by synthesized according to ref. 17 and purified by TLC. 1,2-GDN Alfred Nobel, has been used to treat angina and heart failure for and 1,3-GDN was prepared by hydrolysis of GTN and purified over 130 years. However, the molecular mechanism of GTN bio- by TLC (18). [2-14C] GTN (55 mCi͞mmol) was obtained from transformation has remained a mystery and it is not well under- American Radiolabeled Chemicals (St. Louis). Disulfiram, chlo- stood why ‘‘tolerance’’ (i.e., loss of clinical efficacy) manifests over ral hydrate, cyanamide, acetaldehyde, phenylephrine, sodium time. Here we purify a nitrate reductase that specifically catalyzes nitroprusside (SNP), Q-Sepharose, DEAE-cellulose, and butyl- the formation of 1,2-glyceryl dinitrate and nitrite from GTN, lead- Sepharose were obtained from Sigma. Hydroxyapatite and ing to production of cGMP and relaxation of vascular smooth protease inhibitor (mixture set III) were from CalBiochem. muscle both in vitro and in vivo, and we identify it as mitochondrial The cGMP assay (125I) kit was purchased from Amersham aldehyde dehydrogenase (mtALDH). We also show that mtALDH is Pharmacia. inhibited in blood vessels made tolerant by GTN. These results demonstrate that the biotransformation of GTN occurs predomi- Enzyme Purification. Mouse RAW264.7 cells (50-g pellet; Ϸ1010 nantly in mitochondria through a novel reductase action of cells) were disrupted by sonication in 30 mM phosphate buffer mtALDH and suggest that nitrite is an obligate intermediate in (KPi), pH 7.5 containing 1 mM DTT, 0.5 mM EDTA, and generation of NO bioactivity. -
Distillation 6
CHAPTER Energy Considerations in Distillation 6 Megan Jobson School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, UK CHAPTER OUTLINE 6.1 Introduction to energy efficiency ....................................................................... 226 6.1.1 Energy efficiency: technical issues................................................... 227 6.1.1.1 Heating.................................................................................... 227 6.1.1.2 Coolingdabove ambient temperatures...................................... 229 6.1.1.3 Coolingdbelow ambient temperatures ...................................... 230 6.1.1.4 Mechanical or electrical power.................................................. 232 6.1.1.5 Summarydtechnical aspects of energy efficiency ..................... 233 6.1.2 Energy efficiency: process economics............................................... 233 6.1.2.1 Heating.................................................................................... 233 6.1.2.2 Cooling..................................................................................... 235 6.1.2.3 Summarydprocess economics and energy efficiency ............... 237 6.1.3 Energy efficiency: sustainable industrial development........................ 237 6.2 Energy-efficient distillation ............................................................................... 237 6.2.1 Energy-efficient distillation: conceptual design of simple columns...... 238 6.2.1.1 Degrees of freedom in design .................................................. -
Addendum CSS 2021
Addendum regarding: The 2021 Certified Specialist of Spirits Study Guide, as published by the Society of Wine Educators Note: This document outlines the substantive changes to the 2021 Study Guide as compared to the 2020 version of the CSW Study Guide. All page numbers reference the 2020 version. Please note that in addition to the information noted below, the tables concerning top-selling brands of particular types of spirits have been updated to reflect the most current statistics available. Page 10: The information regarding congeners was expanded to include the following: Congeners: The preceding explanation of distillation has been simplified by using the example of a solution made of only ethyl alcohol and water. However, many other compounds are created during fermentation and as a result, there are other compounds besides water and alcohol present in a fermented solution. Known as congeners, these compounds are responsible for much of the aroma and flavor—besides that of pure ethyl alcohol and water—of a fermented beverage or a distilled spirit. Specific congeners include the various acids, esters, aldehydes, fusel oils, and alcohols (other than ethanol) that are developed during fermentation. During distillation, congeners may vaporize and blend in with the ethanol–water vapors; however, each specific congener will react differently based on three factors: boiling point, solubility (in ethanol and water), and specific gravity. In addition, the heat of the distillation process—via a series of chemical changes known as pyrolysis—may cause some compounds to change form, creating new and different congeners that may be passed onto the finished product. -
Review of Extractive Distillation. Process Design, Operation
Review of Extractive Distillation. Process design, operation optimization and control Vincent Gerbaud, Ivonne Rodríguez-Donis, Laszlo Hegely, Péter Láng, Ferenc Dénes, Xinqiang You To cite this version: Vincent Gerbaud, Ivonne Rodríguez-Donis, Laszlo Hegely, Péter Láng, Ferenc Dénes, et al.. Review of Extractive Distillation. Process design, operation optimization and control. Chemical Engineering Research and Design, Elsevier, 2019, 141, pp.229-271. 10.1016/j.cherd.2018.09.020. hal-02161920 HAL Id: hal-02161920 https://hal.archives-ouvertes.fr/hal-02161920 Submitted on 21 Jun 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Open Archive Toulouse Archive Ouverte OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible This is an author’s version published in: http://oatao.univ-toulouse.fr/239894 Official URL: https://doi.org/10.1016/j.cherd.2018.09.020 To cite this version: Gerbaud, Vincent and Rodríguez-Donis, Ivonne and Hegely, Laszlo and Láng, Péter and Dénes, Ferenc and You, Xinqiang Review of Extractive Distillation. Process design, operation optimization and control. (2018) Chemical Engineering Research and Design, 141. -
Application Note 160
APPLICATION NOTE 160 Degas Options for Sample Preparation Introduction A degas study was conducted to determine the effectiveness 1. Inert environment – shift from of flow versus vacuum degas. An amorphous silica- adsorbed phase to inert. alumina and a microporous zeolite were prepared by both techniques and then nitrogen isotherms were collected 2. Heat – increase the rate. for both materials. The resulting isotherms established equivalence between vacuum versus flow degas. Vacuum versus Flowing Degas Methods In the present study we accept that temperature may be controlled by various methods and that commercial temperature controllers provide repeatable performance. Rather than studying temperature control, this document will evaluate the topic of vacuum versus flowing degas. 1. Vacuum degas utilizes mass action as the only method for shifting the chemical equilibrium. An adsorbed molecule has a concentration on the surface, C and a negligible pressure, P=0 in the vapor phase. The pressure is maintained near zero since the sample is in a vacuum. Heating the sample increases the rate of transfer from the adsorbed molecules to the inert environment. 2. Flowing degas also utilizes mass action Theory by constant inert purge. The desorbed molecules are swept from the system Typical degas options include vacuum or flowing degas. The via the continuous inert gas flow and the basic concept of degas is quite simple. The sample material partial pressure of the desorbed molecules is placed in an inert environment. This inert environment in an inert stream approaches zero in a exploits chemical potential and creates a favorable state for manner similar to the vacuum technique. -
Distillation Theory
Chapter 2 Distillation Theory by Ivar J. Halvorsen and Sigurd Skogestad Norwegian University of Science and Technology Department of Chemical Engineering 7491 Trondheim, Norway This is a revised version of an article published in the Encyclopedia of Separation Science by Aca- demic Press Ltd. (2000). The article gives some of the basics of distillation theory and its purpose is to provide basic understanding and some tools for simple hand calculations of distillation col- umns. The methods presented here can be used to obtain simple estimates and to check more rigorous computations. NTNU Dr. ing. Thesis 2001:43 Ivar J. Halvorsen 28 2.1 Introduction Distillation is a very old separation technology for separating liquid mixtures that can be traced back to the chemists in Alexandria in the first century A.D. Today distillation is the most important industrial separation technology. It is particu- larly well suited for high purity separations since any degree of separation can be obtained with a fixed energy consumption by increasing the number of equilib- rium stages. To describe the degree of separation between two components in a column or in a column section, we introduce the separation factor: ()⁄ xL xH S = ------------------------T (2.1) ()x ⁄ x L H B where x denotes mole fraction of a component, subscript L denotes light compo- nent, H heavy component, T denotes the top of the section, and B the bottom. It is relatively straightforward to derive models of distillation columns based on almost any degree of detail, and also to use such models to simulate the behaviour on a computer. -
Degas Backfill Gas Selection for Micromeritics Gas Adsorption Instruments
Application Note 73 Degas Backfill Gas Selection for Micromeritics Gas Adsorption Instruments Introduction adsorbed gas is one type of contaminant that you Specific surface areas and pore volume distribu- wish to remove during degassing, using nitrogen tions are often determined using gas adsorption as the backfill gas partially defeats the purpose of techniques. Prior to analysis, any adsorbed gas or degassing. Obviously, nitrogen is not a true inert vapor phase (such as water or other volatiles) gas when it comes to microporous materials. should be removed from the sample. This process is often referred to as degassing the sample. Therefore, for materials which tend to adsorb nitrogen, helium is a better choice as the backfill Degassing usually involves either heating the gas. Helium adsorption at room temperature is sample or flowing an inert gas across the sample negligible, even in the high energy pores of most during evacuation. In either case, molecules being microporous samples. desorbed from the surface of the sample are removed from the sample tube. After degassing, There are some highly microporous materials in the sample tube can be sealed and removed in one which helium (if used as the backfill gas) is ex- of the following conditions: tremely difficult to remove due to diffusion. Complete removal requires great care as well as • Under vacuum using the TranSealTM, an appa- time-consuming tasks. Otherwise its presence can ratus which is inserted into the sample tube. It severely distort an adsorption isotherm. is designed to close when removed from the degassing port and open automatically when For samples where neither nitrogen nor helium are installed on the sample port, maintaining a ideal, a vacuum-sealed transfer is the most vacuum-tight seal. -
Distillation Accessscience from McgrawHill Education
6/19/2017 Distillation AccessScience from McGrawHill Education (http://www.accessscience.com/) Distillation Article by: King, C. Judson University of California, Berkeley, California. Last updated: 2014 DOI: https://doi.org/10.1036/10978542.201100 (https://doi.org/10.1036/10978542.201100) Content Hide Simple distillations Fractional distillation Vaporliquid equilibria Distillation pressure Molecular distillation Extractive and azeotropic distillation Enhancing energy efficiency Computational methods Stage efficiency Links to Primary Literature Additional Readings A method for separating homogeneous mixtures based upon equilibration of liquid and vapor phases. Substances that differ in volatility appear in different proportions in vapor and liquid phases at equilibrium with one another. Thus, vaporizing part of a volatile liquid produces vapor and liquid products that differ in composition. This outcome constitutes a separation among the components in the original liquid. Through appropriate configurations of repeated vaporliquid contactings, the degree of separation among components differing in volatility can be increased manyfold. See also: Phase equilibrium (/content/phaseequilibrium/505500) Distillation is by far the most common method of separation in the petroleum, natural gas, and petrochemical industries. Its many applications in other industries include air fractionation, solvent recovery and recycling, separation of light isotopes such as hydrogen and deuterium, and production of alcoholic beverages, flavors, fatty acids, and food oils. Simple distillations The two most elementary forms of distillation are a continuous equilibrium distillation and a simple batch distillation (Fig. 1). http://www.accessscience.com/content/distillation/201100 1/10 6/19/2017 Distillation AccessScience from McGrawHill Education Fig. 1 Simple distillations. (a) Continuous equilibrium distillation. -
Building a Home Distillation Apparatus
BUILDING A HOME DISTILLATION APPARATUS A Step by Step Guide Building a Home Distillation Apparatus i BUILDING A HOME DISTILLATION APPARATUS Foreword The pages that follow contain a step-by-step guide to building a relatively sophisticated distillation apparatus from commonly available materials, using simple tools, and at a cost of under $100 USD. The information contained on this site is directed at anyone who may want to know more about the subject: students, hobbyists, tinkers, pure water enthusiasts, survivors, the curious, and perhaps even amateur wine and beer makers. Designing and building this apparatus is the only subject of this manual. You will find that it confines itself solely to those areas. It does not enter into the domains of fermentation, recipes for making mash, beer, wine or any other spirits. These areas are covered in detail in other readily available books and numerous web sites. The site contains two separate design plans for the stills. And while both can be used for a number of distillation tasks, it should be recognized that their designs have been optimized for the task of separating ethyl alcohol from a water-based mixture. Having said that, remember that the real purpose of this site is to educate and inform those of you who are interested in this subject. It is not to be construed in any fashion as an encouragement to break the law. If you believe the law is incorrect, please take the time to contact your representatives in government, cast your vote at the polls, write newsletters to the media, and in general, try to make the changes in a legal and democratic manner. -
Alcohol Hangover- Its Effects on Human Body: Review
DOI: 10.26717/BJSTR.2018.04.001112 Loveleen Bajaj. Biomed J Sci & Tech Res ISSN: 2574-1241 Mini Review Open Access Alcohol Hangover- its Effects on Human Body: Review Loveleen Bajaj* and Ranjeet Singh Department of Food science & technology, Khalsa College, India Received: May 20 2018; Published: May 25, 2018 *Corresponding author: Loveleen Bajaj, Department of Food science & technology, Khalsa College, Amritsar, India Abstract A hangover is a syndrome of physical and mental symptoms that occurs after 8 to 16 hours of consumption with a zero level of alcohol. The objective of the study is to explore effects of the alcohol hangover. The impairing effects on memory functioning such as delayed recall, response to battle infection leading to unpleasant effects include nausea, vomiting, dizziness, fatigue and hormonal imbalance in the body. Dehydrationirritation, lack is ofbelieved concentration to be the and cause after ofacute hangover alcohol as intoxication. it leads to anti-diuresisNormally the state body in might the body.use cytokines The most to compelling trigger fever theory of inflammatory that, at the moment, is that hangover results from a buildup of acetaldehyde, a toxic compound in the body. The congener amount in the particular alcoholic beverage is believed to be increase the extent of severity of hangover. Methanol, found in highest levels in whiskey and red wine has received a larger amount of blame for showing that it can linger in the body after all alcohol has been eliminated, perhaps accounting for the enduring effects of hangover. Abbreviations: BAC: Blood Alcohol Concentration; AW: Alcohol Withdrawal; FASD: Fetal Alcohol Spectrum Disorders Introduction Anes and colleagues revealed that half of the interrogated workers during hangover were at the work. -
Liquid Degassing and Gasification Solutions
CARBONATION NITROGENATION LIQUID DEGASSING AND DECARBONATION GASIFICATION SOLUTIONS Providing sanitary processing equipment and customized services Since 1885 CO2 Control of Beer Adjust the carbonation level in beer. Sometimes natural fermentation does not create enough CO2 for the end product which impacts taste and the head of a beer. On the same note, removal of excess CO2 in over-carbonated beer is also an easy process. Nitrogenation of Beer There is a niche market for stout beer where nitrogen is added to beer to improve the foam head on top of the beer. Liqui-Cel® Membranes Liqui-Cel membrane contactors are leading gas transfer devices, commonly used in carbon dioxide removal, deoxygenation, nitrogenation and carbonation. Capable of achieving <1 ppm CO2 and <1 ppb O2, they provide precision in gas control. Because of their cleanliness and predictability, Liqui-Cel membranes are the standard degassing technology in ultrapure water applications. Due to the small footprint, lower installation costs and modular nature of the system, they provide flexibility and can be readily expanded to meet growing capacity. Membranes come in multiple sizes so that you can maximize efficiency and performance while taking into account the desired flow rate and footprint requirements. Need more info? Contact your local sales representative or visit our website at www.mgnewell.com. CREATE A SMOOTH BEER—A “KEG” BEER HOW IT WORKS Liqui-Cel membranes use a microporous hollow fiber membrane to add and/or remove gases from liquids. The hollow fiber is knitted into an array and wrapped around a center tube inside of the membrane housing. -
2 Water Distiller Instructions
Water Distiller Checklist: (What you need for successful distilling) £ Test Jar £ Proof & Trail Hydrometer £ Distillers Activated Carbon £ Liquor Quik Super Yeast (makes 5 gallons of mash 20%) £ Liquor Quik Flavor Over 25 Flavors to choose from *Alcohol distillation is not legal in all countries. It is the responsibility of the user to abide by local laws. BrewersDirect Inc. does not accept responsibility for illegal use of any distillation apparatus. The Water Distiller The Water Distiller is a high quality, countertop distiller based on a very popular water distillation unit. The boiling vessel and cooling chamber are made of stainless steel. No cooling water is required, as the unit is fan cooled, making the distillation process virtually as simple as making coffee! For those in countries where alcohol distillation is legal, the unit can produce up to 60% product with virtually no off-tastes or smells on a single run. A second run can actually improve this to nearly 90%! Just as with many countertop water distillers, activated carbon filtration can take place inline, on the way to the collection container, completing the entire distillation and filtration processes in a single step. The Process It is almost as simple as adding 4L of liquid to the boiling chamber, plugging the unit it, and collecting your distillate. Water Distillation Remove the top of the unit, add 4L of water to the boiling chamber and replace the top of the unit. Plug in the water distiller. Place an activated carbon pouch in the plastic carbon holder and place this on top of the collection bottle.