In the first step of the extraction, solvents with different polarities were applied to the samples for the evaluation of artemisinin solubility. Then, ethanol was chosen for extraction solvent due the high extraction yield and classification in safer chemical ingredients list by EPA. ... Artemisinin analytical standard, silica and diatomite ...
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A process is described for solvent extraction of oil-bearing diatomite ore. An apparatus is provided for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent.
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent, solvent is recovered from the extract by multiple effect evaporation followed by stripping, and the spent diatomite is contacted with water to displace a …
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Patent: Process and apparatus for solvent extraction of oil from oil-containing diatomite ore
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The properties of the solvent used for solvent extraction 1. The solvent should be well miscible with the liquid to be extracted. 2. The solvent should not be miscible with the other components of the mixture or react with the solute. 3. The boiling point of the solvent should be low enough ( well below the melting point of the solute) such ...
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent ...
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Abstract A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent, solvent is recovered from the extract by multiple effect evaporation followed by stripping, and the spent diatomite is contacted with water to displace a …
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent, solvent is recovered from the extract by multiple effect evaporation followed by stripping, and the spent diatomite is contacted with water to displace a …
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A novel diatomite-supported zeolitic imidazolate framework-8 sorbent (ZIF-8@Dt-COOH) was in situ fabricated and developed for solid-phase extraction of three benzodiazepines (triazolam, midazolam and diazepam) in urine followed by high-performance liquid chromatography. ZIF-8@Dt-COOH was easily prepared by coating …
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent, solvent is recovered from the extract by multiple effect evaporation followed by stripping, and the spent diatomite is contacted with water to displace a …
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A new sensitive and selective methods was developed to quantify different types of pesticides and their degradation products in sediment. The method developed was optimized and modified based on the accelerated solvent extraction, followed by the solid-phase extraction clean-up technique. High-performance liquid chromatography coupled …
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent, solvent is recovered from the extract by multiple effect evaporation followed by stripping, and the spent diatomite is contacted with water to displace ...
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Abstract In search of an efficient method for the revalorization of spent bleaching earth (SBE), a waste from vegetable oil refinery plant, three different solvent extraction strategies were adopted. Acetone (A), n-hexane (H), and n-hexane/acetone (HA) solvent systems were used for the extraction of the remnant polar and nonpolar organic …
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Supercritical extraction of diatomaceous earth results in a much more significant improvement in hydrocarbon recovery over Fischer retorting than achievable with tar …
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Supercritical extraction of diatomaceous earth results in a much more significant improvement in hydrocarbon recovery over Fischer retorting than achievable with tar sands. Process and apparatus for supercritical extraction of diatomaceous earth are disclosed. ... solvent diatomaceous earth outlet fluid solid Prior art date
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Besides, the amount of drying agent (diatomite) used in the extraction pool should be controlled at a basically same level. Otherwise, an insufficient amount of diatomite could not dry the sample completely and improve the dosage of extraction solvent in the whole process. Thereby, the volume of extract would be higher causing …
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Most of the extraction solvents used in the extraction have high toxicity, flammability, low selectivity, and large-scale consumption of these solvent also influence environment adversely. ... Activated carbon, diatomite and silica were frequently used substances for removal of chlorophylls, essential oils and waxes (Chemat et al., 2017).
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Marine cyanobacteria represent a large untapped source of functional glycolipids enriched with polyunsaturated fatty acids (PUFAs) for human health. However, advanced methods for scalable isolation of diverse species containing high-purity PUFA-rich glycolipids will have to be developed and their possible pharmaceutical and nutraceutical functions identified. …
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a …
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Methods used in the past to attempt to extract the hydrocarbons from mined diatomite ore included solvent extraction and retorting, using a Lurgi Retort. With the …
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A novel diatomite-supported zeolitic imidazolate framework-8 sorbent (ZIF-8@Dt-COOH) was in situ fabricated and developed for solid-phase extraction of three benzodiazepines (triazolam, midazolam and diazepam) in urine followed by high-performance liquid chromatography. ZIF-8@Dt-COOH was easily prepared by coating …
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Turning the volume down on heavy metals using tuned diatomite. A review of diatomite and modified diatomite for the extraction of heavy metals from water. September 2012; Journal of Hazardous ...
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Solvent Extraction. The Author: George E. Anderson, Crown Iron Works Company, P.O. Box 1364, Minneapolis, MN 55440 USA. One of the most basic needs of mankind is an abundant and reliable food supply. In the modern world, one major source of protein and vegetable oil is from oilseeds, particularly the soybean – an abundant resource which is ...
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The process involves leaching of raw diatomite with acid prior to alkali extraction, solubilization of treated diatomite with alkali solution to form sodium silicate …
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tion, extraction, recovery of solvent from spent solids and recovery of solvent from the extract. Diatomite ore requires little preparation, since it is a soft friable solid which disintegrates when mixed with solvent. The pres ent process employs countercurrent decantation to' ex tract oil from diatomite ore with a hydrocarbon solvent.
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1. Introduction. Diatomaceous earth (DE), also known as diatomite, tripolite or kieselgur, is a white powder occurring naturally ubiquitously as a soft sedimentary rock containing about 80 to 90 % silica. 1,2 It has been used in its raw form as a building material 1; as a stabilizer of nitroglycerine in dynamite 1; as a filter aid for water, sugar, sweetened liquors, oils, …
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Compared with bare Dt-COOH, the extraction efficiency of ZIF-8@Dt-COOH for the target was significantly increased from 20.1-39.0% to . Main extraction parameters, including ionic strength and pH of solution, loading volume, washing solution, elution solvent and elution volume, were optimized in detail.
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They offer a great advantage relative to solvent extraction technology, given that the use of non-aqueous solvents (environmentally unfriendly) is avoided. Potentially low cost materials including diatomite for the sorption of heavy metals have been discussed in the literature [6] .
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Patent: Process and apparatus for solvent extraction of oil from oil-containing diatomite ore
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Accelerated solvent extraction, or ASE, is a sample preparation technique that helps generate high quality chromatographic results by using organic solvents at high temperatures and pressures to quickly and efficiently remove unwanted matrix components from your sample. The elevated temperature increases the efficiency of extracting …
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In this study, activated carbon/diatomite-based magnetic nancomposites (denoted as AC/DBMNs) were synthesized and applied as an adsorbent for magnetic solid-phase extraction of S-phenylmercapturic acid (S-PMA) from human urine prior to high-performance liquid chromatography.The surface morphologies and structures of …
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Diatomite Modified diatomite Extraction Heavy metals Water purification 1. History and formation Diatomite or diatomaceous earth is the fossilised remnants of …
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Diatomaceous Earth. The diatomaceous earth, which is also referred to as diatomite or kieselguhr, is a siliceous, sedimentary rock consisting principally of the fossilised skeletal remains of the diatom, which is a unicellular aquatic plant related to the algae. From: Computer Aided Chemical Engineering, 2007. View all Topics.
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Diatomite can also be upgraded by leaching, a process by which a soluble metallic compound is removed from a mineral by selectively dissolving it in a suitable solvent like sulfuric acid. Diatomite mining in the United States is all open pit, normally using some combination of bulldozers, scraper-carriers, power shovels, and trucks to remove ...
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A process for solvent extraction of oil from oil bearing diatomite ore and an apparatus for use therewith, wherein the ore is extracted by countercurrent decantation with a hydrocarbon solvent ...
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Solvent extraction is the most widely used method to separate artemisinin from the Chinese medicinal herb Artemisia annua L. ... Various volumes and ratios of solvents and diatomite were tested ...
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