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Process for the preparation of spice extracts - Henkel ...

Dec 25, 1984 · More particularly, this invention is directed to the preparation of spice extracts by extraction in two stages with a non-toxic gas as solvent. BACKGROUND OF THE INVENTION. A process for the production of spice extracts by extraction in two stages with a non-toxic gas as solvent is known from German Pat. No. 2,127,611.

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IONIC LIQUIDS AND HYPERBRANCHED POLYMERS – .

means of solvent extraction [24] [23] [35]. The remarkable solubility and selectivity, the low melt and solution viscosities as well as the high compatibility suggest, that hyperbranched polymers also can be used as selective entrainers for extractive distillation. Therefore, this work aims to investigate the suitability of ionic liquids (IL) and

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Recovery of acetonitrile from aqueous waste by a combined ...

Introduction extraction and the solvent recovery equipments and therefore, improving the economic of the resulting process. The selection Solvent extraction is a process for separating components of an effective solvent to be used in a liquid–liquid extraction in solution according to their distribution between two nearly process is ...

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Special Issue "Advances in Supercritical Fluid Extraction"

Through single factor analysis, the research discussed the influence of three factors: extraction temperature, extraction pressure and extraction time on the extraction rate of the essential oil. Then the study used the response surface software to optimize the extraction of the process conditions and discussed the antioxidant of it.

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Design of the Recovery Section of the Extracted Aromatics ...

Design of the Recovery Section of the Extracted Aromatics in the Separation of BTEX from Naphtha Feed to Ethylene Crackers Using [4empy][Tf2N] and [emim][DCA] Mixed Ionic Liquids as Solvent

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An approach for solvent selection in extractive ...

An approach for solvent selection in extractive distillation systems including safety considerations . Nancy Medina-Herrera, 1. ... (CAMD) to find safer entrainers for a liquidliquid extraction system. - One limitation of this work is that an optimization of the process was not carried out. ... process design, since it aims to avoid risk ...

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Thermodynamic Analysis and Process Simulation of Ethanol ...

The heterogeneous azeotropic distillation process is widely used to separate nonideal binary mixtures into their constituent pure components. This method uses the addition of a third component, called an entrainer, to cause liquid–liquid phase separation over a broad range of compositions in the ternary phase diagram. Ethanol dehydration was used as a case study and diisopropyl ether and ...

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Multi-scale simulation of the 1,3-butadiene extraction ...

A multi-scale simulation method is proposed to enable screening of ionic liquids (ILs) as entrainers in extractive distillation. The 1,3-butadiene production process with acetonitrile (ACN) was chosen as a research case to validate the feasibility of the methodology. Ab initio calculations were first carried out to

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Extractive distillation with the mixture of ionic liquid ...

The use of the mixture of ionic liquid (IL) and solid inorganic salt in place of the single IL as entrainers for extractive distillation, which integrates the advantages of a liquid solvent, that is, IL (easy operation and nonvolatility) and a solid salt (high separation ability) has been proposed in this work.

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Extraction of Natural Pigments by Supercritical Fluid ...

Supercritical fluid extraction is the extraction process using fluids above the critical temperature and critical pressure as the solvent. The fluid near the critical point not only has a very high solubility of the substance, but also the solubility of the substance varies with the pressure or the temperature of the system, so that the selective extraction of the separated substance can be ...

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Tooth extraction procedure: The ... - Animated-Teeth

Your extraction process itself will be similar to what we describe, simply because that's the only way there is to remove teeth. What will likely be unique to your situation is the planning that takes place before and after your procedure. For example, your extractions will probably be scheduled for a non-dialysis day ("blood thinners" used ...

Your Dentist Will Use These Tools.Dentists have a variety of tools they use to grasp and apply pressure to teeth. Some of them are pliers-like instruments called "extraction forceps...C) What You'll Feel During Your extraction.[ We've updated our information and now have an entire page dedicated to the subject of what you can expect to feel (pain, pressure) during your ex...D) Expect That You Might Hear Some Startling noises.As explained above, pulling teeth is a fairly physical process.And in light of this fact, it should be no surprise to learn that you may hear a min...E) "Closing" The Extraction Site.Once your tooth has been removed, your dentist will begin the process of closing up your surgical site. This process frequently includes: 1. Gently...F) Dismissing You at The End of Your appointment.Once your extraction procedure has been completed, there are still a few steps your dentist must do.Your dentist will place one or more pieces of g...How Long Will Your Extraction take?Most "simple" (see definition below) single-tooth extractions will take on the order of 20 to 40 minutes. We give a precise breakdown (type of toot...Get Price

Recovery of acetonitrile from aqueous waste by a combined ...

Introduction extraction and the solvent recovery equipments and therefore, improving the economic of the resulting process. The selection Solvent extraction is a process for separating components of an effective solvent to be used in a liquid–liquid extraction in solution according to their distribution between two nearly process is ...

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Supercritical Extraction Processes - Markit

I 1 For detailed marketing data and information, the reader is referred to one of the SRI programs specializing in marketing research. The CHEMICAL ECONOMlCS HANDBOOK Program covers most major chemicals and chemical products produced in the United

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(PDF) Recovery of Acetonitrile from Aqueous Solutions by ...

PDF | The aim of this work was to apply extractive distillation for acetonitrile removal from water solutions, to validate thermodynamic criterion based on excess Gibbs energy to entrainer ...

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Chemical Engineering: Selecting Entrainers for Azeotropic ...

Feb 18, 2010 · Entrainers are also used to enable the separation of non-azeotropic mixtures where the direct separation is either not feasible due to process constraints (e.g., maximum operating temperature) or highly uneconomical (e.g., due to the presence of a severe tangent pinch, as in .

Supercritical fluid extraction of polycyclic aromatic ...

The clean-up of contaminated soils by supercritical fluid extraction (SFE) can be increased significantly with entrainers. Lab-scale and technical-scale experiments were carried out with contaminated soils and PAH spiked soil, because of their low volatility which renders their removal.

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Azeotropic distillation - Wikipedia

For this, a near azeotropic mixture is sent to the final column where azeotropic distillation takes place. Several entrainers can be used for this specific process: benzene, pentane, cyclohexane, hexane, heptane, isooctane, acetone, and diethyl ether are all options as the mixture.

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Separation of isopropanol from aqueous solution by salting ...

Jun 19, 2001 · Potassium carbonate enlarged the area of the two‐phase region. This effect essentially increased the distribution coefficient of isopropanol between hexane and water and increased the separation factor for isopropanol vs water, which is an important consideration in designing a solvent extraction process.

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The Science Behind Supercritical CO2 | Hightech Extracts

In order to avoid this problem, vegetable matrices are usually dried before extraction, unless extracts containing also polar substances are wanted. In this case it is necessary to add other solvents (entrainers or co-solvents) directly to the matrix or to the CO2, .

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Selecting Entrainers for Azeotropic Distillation | AIChE

Would you like to reuse content from CEP Magazine? It's easy to request permission to reuse content. Simply click here to connect instantly to licensing services, where you can choose from a list of options regarding how you would like to reuse the desired content and complete the transaction.

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Extraction of Natural Products Using Near-Critical Solvents

6.4.2 Equipment for extraction with liquid CO2 on a commercial scale 6.4.3 Commercial extraction with supercritical CO2 6.5 Commercial use of C02 extracts since 1982 6.6 Conclusions Appendix: COz-extracted flavour and fragrance ingredients References 7 Physico-chemical data required for the design of near-critical fluid extraction process

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