Download or read book Supercritical Extraction of Essential Oils of and with Carbon Dioxide written by Carmen Muller and published by . This book was released on 2017 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The extraction of essential oils of , and has been studied using supercritical carbon dioxide as solvent. The raw materials were dried at room temperature (30 ± 2C) for 5 days. The dried leaves were cut in pieces of 1cm () or 3cm of length ( and ). The fixed bed was packed with 87 ± 1g, 68 ± 2g, and 64 ± 2 g of , , and , respectively. The extractions were performed at 16C and 70 bar (condition 1) and 25C and 160 bar (condition 2). A static period of 60 minutes was used. The experiments were performed in duplicate. The extraction yields varied with material and operational conditions. For the extract the yield was 0.31% for condition 1 and 0.68% for condition 2. The yield was 0.45% and 0.99% for conditions 1 and 2 for . The yields for the extracts were 0.07% and 0.20% for conditions 1 and 2, respectively. The SC extraction yields were less than that of steam distillation (: 2.50%; : 2.15%; : 1.39%) for all samples. The chemical composition of the extracts was analyzed by GC-MS.
Download or read book Extraction of Natural Products Using Near Critical Solvents written by M.B. King and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to present the current state of the art of extracting natural products with near-critical solvents and to view the possibilities of further extensions of the technique. Relevant background theory is given but does not dominate the book. Carbon dioxide is the near-critical solvent used in most recent applications and inevitably receives prominence. In addition to general descriptions and reviews, the book contains three chapters by indus trial practitioners who describe in detail the operation of their processes and discuss the market for their products. Sections on the design of the pressure vessels and pumps required in these processes and on the acquisition of the data required for design are included. The costing of the processes is also discussed. There is good scope for combining a near-critical extraction step with other process steps in which the properties of near-critical solvents are utilised, for example as a reaction or crystallisation medium and a chapter is devoted to these important aspects. It is hoped that the work will be found to contain a great deal of specific information of use to those already familiar with this field. However the style of presentation and content is such that it will also be useful as an introduction. In particular it will be helpful to those wondering if this form of separation method has anything to offer for them, whether they are engineers, chemists or managers in industry, or in academic or research institutions.
Download or read book Natural Extracts Using Supercritical Carbon Dioxide written by Mamata Mukhopadhyay and published by CRC Press. This book was released on 2000-06-27 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizing research from a wide variety of sources, this work offers a convenient guide to a clean, safe, inexpensive, non-toxic, non-polluting solvent that performs better than most conventional solvents. Natural Extracts Using Supercritical Carbon Dioxide reviews recent developments in the technology and its applications to the food, flavor, fragrance, and pharmaceutical industries. It outlines the many advantages that this method has over traditional methods like steam distillation, solvent extraction, and molecular distillation, and it supports the popular trend toward the use of natural products in these industries.
Download or read book Extraction of Essential Oils from Jasmine Flower Using Supercritical Co2 Co solvent Extraction written by Norulshahida Che Din and published by . This book was released on 2006 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pure essential oils are derived from various part of the plant. These essential oils have a very high commercial value due to its properties. They are widely used in the various fields of industries, such as perfumery industries and pharmaceuticals. Conventional technique to extracts this oil such as steam distillation is unsuitable since it induce thermal degradation of compounds in the oils. It is for this reason that the extraction of essential oils using supercritical fluid extraction method is said to be the most effective method. It also can avoid contamination of the oil. This extraction technique employed carbon dioxide (CO2) as solvent due to CO2 is stateless, odorless, non-toxic and chemical inertness and would not contaminate the environment and products. Thus, the material residues can be used without pretreatment. Beside that, the low critical properties make CO2 the most preferable solvent in this technique. The used of co-solvent also affect the extraction of these essential oils because it could modify the CO2 selectivity towards the fragrances compound. This can in turn produce higher quantity of products. For this purpose, two co-solvent had been employed, viz. ethanol and methanol.
Download or read book Hydrosols written by Suzanne Catty and published by Simon and Schuster. This book was released on 2001-03-01 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: • The first book devoted exclusively to aromatic hydrosols--gentle, water-based plant extracts that expand the healing, cosmetic, and culinary applications of aromatherapy. • The newest development in the field of aromatherapy. • The homeopathic form of aromatic treatment that is the perfect complement to other forms of vibrational medicine. • A comprehensive reference with more than 100 recipes and formulas for using hydrosols as well as sources of supply. • With an introduction by Kurt Schnaubelt, author of Advanced Aromatherapy and Medical Aromatherapy. Hydrosols is one of the most anticipated books in the world of holistic health because it introduces a revolutionary new use of essential oils in aromatic treatment. Hydrosols, or hydrolates, are the pure, water-based solutions created when essential oils are steam distilled. Through this process, a potent, yet subtle form of medicine is created, one that is able to be ingested as well as applied directly to the skin, unlike most pure essential oils. In fact, hydrosols are considered the homeopathic version of aromatherapy, and as such are ideal for use with children, animals, and those with fragile immune systems. Suzanne Catty details the specifics of 67 hydrosols, provides formulas to treat more than 50 health concerns, and offers 40 delicious recipes in which hydrosols can be used. Her section on pets will help owners deal with urinary tract and digestive problems as well as grooming and odor issues. She also shows how hydrosols can be used with other forms of vibrational medicine and with feng shui, geomancy, and dowsing.
Download or read book Applied Numerical Methods written by Brice Carnahan and published by . This book was released on 1969-01-15 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interpolation and approximation; Numerical integration; Solution of equations; Matrices and related topics; Systems of equations; The approximation of the solution of ordinary differential equations; Approximation of the solution of partial differential equations; Statistical methods.
Download or read book Supercritical Fluid Extraction of Nutraceuticals and Bioactive Compounds written by Jose L. Martinez and published by CRC Press. This book was released on 2007-11-28 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced concern for the quality and safety of food products, increased preference for natural products, and stricter regulations on the residual level of solvents, all contribute to the growing use of supercritical fluid technology as a primary alternative for the extraction, fractionation, and isolation of active ingredients. As a solvent-free p
Download or read book On the Extraction of Essential Oils by Supercritical Carbon Dioxide and Its Influence on the Mesomorphic Phase Structures written by José da Cruz Francisco and published by . This book was released on 2002 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Green Extraction Techniques Principles Advances and Applications written by and published by Elsevier. This book was released on 2017-07-17 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Extraction Techniques: Principles, Advances and Applications, Volume 76, the first work to compile all the multiple green extraction techniques and applications currently available, provides the most recent analytical advances in the main green extraction techniques. This new release includes a variety of comprehensively presented topics, including chapters on Green Analytical Chemistry: The Role of Green Extraction Techniques, Bioactives Obtained From Plants, Seaweeds, Microalgae and Food By-Products Using Pressurized Liquid Extraction and Supercritical Fluid Extraction, Pressurized Hot Water Extraction of Bioactives, and Pressurized Liquid Extraction of Organic Contaminants in Environmental and Food Samples. In this ongoing serial, in-depth, emerging green extraction approaches are discussed, together with their miniaturization and combination, showing the newest technologies that have been developed in the last few years for each case and providing a picture of the most innovative applications with further insights into future trends. Compiles all the multiple green extraction techniques currently available, along with their applications Includes the most recent analytical advances in the main green extraction techniques, along with their working principles Covers emerging green extraction approaches, their miniaturization and combination and an insight into future trends
Download or read book Extraction of Essential Oil from Spearmint Leaves by Supercritical Carbon Dioxide written by Kyoung-Heon Kim and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extraction of Essential Oils from Jasmine Flower Using Supercritical Carbon Dioxide written by Jessica Frederick Lamhai and published by . This book was released on 2006 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Thermodynamic Tables of the Fluid State written by S. Angus and published by Elsevier. This book was released on 2013-10-22 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Thermodynamic Tables of the Fluid State - 7 Propylene (Propene) is a compilation of internationally agreed values of the equilibrium thermodynamic properties of propylene. This book is composed of three chapters, and begins with the presentation of experimental result of thermodynamic studies compared with the equations used to generate the tables. The succeeding chapter deals with correlating equations for thermodynamic property determination of propylene. The last chapter provides the tabulations of the propylene's thermodynamic properties and constants. This book will prove useful to physical chemists.
Download or read book Principles of Adsorption and Adsorption Processes written by Douglas M. Ruthven and published by John Wiley & Sons. This book was released on 1984-06-05 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first up-to-date summary and review for the fundamental principles and industrial practice of adsorption separation processes in more than 30 years. Emphasizes the understanding of adsorption column dynamics and the modeling of adsorption systems, as well as fundamental aspects of kinetics and equilibria.
Download or read book Supercritical Fluids written by E. Kiran and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercritical fluids are neither gas nor liquid, but can be compressed gradually from low to high density and they are therefore interesting and important as tunable solvents and reaction media in the chemical process industry. By adjusting the density the properties of these fluids can be customised and manipulated for a given process - physical or chemical transformation. Separation and processing using supercritical solvents such as CO2 are currently on-line commercially in the food, essential oils and polymer industries. Many agencies and industries are considering the use of supercritical water for waste remediation. Supercritical fluid chromatography represents another, major analytical application. Significant advances have recently been made in materials processing, ranging from particle formation to the creation of porous materials. The chapters in this book provide tutorial accounts of topical areas centred around: (1) phase equilibria, thermodynamics and equations of state; (2) critical behaviour, crossover effects; (3) transport and interfacial properties; (4) molecular modelling, computer simulation; (5) reactions, spectroscopy; (6) phase separation kinetics; (7) extractions; (8) applications to polymers, pharmaceuticals, natural materials and chromatography; (9) process scale-up.
Download or read book Green Extraction of Natural Products written by Farid Chemat and published by John Wiley & Sons. This book was released on 2016-03-11 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extraction processes are essential steps in numerous industrial applications from perfume over pharmaceutical to fine chemical industry. Nowadays, there are three key aspects in industrial extraction processes: economy and quality, as well as environmental considerations. This book presents a complete picture of current knowledge on green extraction in terms of innovative processes, original methods, alternative solvents and safe products, and provides the necessary theoretical background as well as industrial application examples and environmental impacts. Each chapter is written by experts in the field and the strong focus on green chemistry throughout the book makes this book a unique reference source. This book is intended to be a first step towards a future cooperation in a new extraction of natural products, built to improve both fundamental and green parameters of the techniques and to increase the amount of extracts obtained from renewable resources with a minimum consumption of energy and solvents, and the maximum safety for operators and the environment.
Download or read book The Properties of Gases and Liquids 5E written by Bruce E. Poling and published by McGraw Hill Professional. This book was released on 2000-11-27 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: Must-have reference for processes involving liquids, gases, and mixtures Reap the time-saving, mistake-avoiding benefits enjoyed by thousands of chemical and process design engineers, research scientists, and educators. Properties of Gases and Liquids, Fifth Edition, is an all-inclusive, critical survey of the most reliable estimating methods in use today --now completely rewritten and reorganized by Bruce Poling, John Prausnitz, and John O’Connell to reflect every late-breaking development. You get on-the-spot information for estimating both physical and thermodynamic properties in the absence of experimental data with this property data bank of 600+ compound constants. Bridge the gap between theory and practice with this trusted, irreplaceable, and expert-authored expert guide -- the only book that includes a critical analysis of existing methods as well as hands-on practical recommendations. Areas covered include pure component constants; thermodynamic properties of ideal gases, pure components and mixtures; pressure-volume-temperature relationships; vapor pressures and enthalpies of vaporization of pure fluids; fluid phase equilibria in multicomponent systems; viscosity; thermal conductivity;diffusion coefficients; and surface tension.
Download or read book Analytical Supercritical Fluid Extraction written by Maria D. Luque de Castro and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in analytical chemistry have turned it into a virtually unrecognizable science compared to a few decades ago, when it lagged behind other sciences and techniques. However, advances in analytical science have been far from universal: while innovations in instrumentation and data acquisition and processing systems have reached unprecedented levels thanks to parallel breakthroughs in computer science and chemo metrics, progress in preliminary operations has been much slower despite their importance to analytical results. Thus, such clear trends in analytical process development as automation and miniaturization have not reached preliminary operations to the same extent, even though this area is pro bably in the greatest need. Improvement in preliminary operations is thus an urgent goal of analytical chemistry on the verge of the twenty first century. Increased R&D endeavours and manufacture of commercially available automatic equipment for implementation of the wide variety of operations that separate the uncollected, unmeasured, untreated sample from the signal measuring step are thus crucial on account of the wide variability of such operations, which precludes development of all-purpose equipment, and the complexity of some, particularly relating to solid samples. Supercritical fluid extraction opens up interesting prospects in this context and is no doubt an effective approach to automatioI1 and mini aturization in the preliminary steps of the analytical process. The dramatic developments achieved in its short life are atypical in many respects.
