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Pilot‐scale Testing of an Integrated Circuit for the ...

Pilot‐scale Testing of an Integrated Circuit for the Extraction of Rare Earth Minerals and Elements From Coal and Coal Byproducts Using Advanced Separation

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(PDF) Chemical extraction of rare earth elements from coal ash

Chemical extraction of rare earth elements from coal ash. D2EHPA was found to be the best extractant in this solvent extraction test series, providing an REE recovery rate of nearly 99 percent.

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Solvent Extraction | Mining and Minerals | Industries ...

LIGHTNIN Solvent Extraction Mixers are custom engineered to maximize the efficiency of your solvent extraction processes. By working with a company that undersands mixing, you will enjoy improved mass transfer, increased mixing efficiency and reduced entrainment levels when compared to .

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Solvent extraction of coal (Book, 1981) [WorldCat]

Solvent extraction of coal. [Janet R Pullen] Home. WorldCat Home About WorldCat Help. Search. Search for Library Items Search for Lists Search for Contacts Search for a Library. Create lists, bibliographies and reviews: or Search WorldCat. Find items in libraries near you ...

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Application of sequential extraction and hydrothermal ...

Seven-step sequential extraction of coal fly ash has demonstrated that 86.1% of total REE were associated with the glassy phase of the fly ash, with the remaining REE mainly distributed in the organic and sulfides phase (8.3%), the exchangeable phase (3.7%), and the carbonates phase (1.5%).

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PRODUCTION OF CARBON PRODUCTS USING A COAL .

The solvent extraction process developed uses mild hydrogenation of low cost oils to create powerful solvents that can dissolve the organic portion of coal. The insoluble portion, consisting mainly of mineral matter and fixed carbon, is removed via centrifugation or filtration, leaving a liquid solution of coal chemicals and solvent.

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Extraction of coal-tar pitch using NMP/ILs mixed solvents ...

Aug 26, 2014 · Extraction of coal-tar pitch using NMP/ILs mixed solvents. In this study, NMP was selected to extract CP first; then [BMIM]Cl/NMP mixed solvent was used; and finally a series of ionic liquids (ILs) mixtures with NMP were developed for the extraction of CP to obtain the refined pitch. The extracts were analyzed via elemental analysis, TGA, FT-IR,...

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Coal mining | World Coal Association

Longwall mining involves the full extraction of coal from a section of the seam, or 'face' using mechanical shearers. The coal 'face' can vary in length from 100-350m. Self-advancing, hydraulically-powered supports temporarily hold up the roof while coal is extracted. When coal has been extracted from the area, the roof is allowed to collapse.

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Solvent Extraction | Mining and Minerals | Industries ...

LIGHTNIN Solvent Extraction Mixers are custom engineered to maximize the efficiency of your solvent extraction processes. By working with a company that undersands mixing, you will enjoy improved mass transfer, increased mixing efficiency and reduced entrainment levels when compared to .

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SELECTIVE REMOVAL OF ORGANIC SULFUR FROM COAL BY ...

May 21, 2007 · Removal of organic sulfur requires the use of chemical cleaning methods. This paper presents the results of an organic sulfur removal technique which employs an organic solvent. This desulfurization technique is selective enough to reject organic sulfur without significantly reducing the calorific value of the treated coal.

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DELAYED COKI G OF SOLVE T EXTRACTED COAL FOR .

This study investigates the feasibility of using high temperature solvent extraction of coal to produce feedstock for the production of anode grade coke through delayed coking. Solvent extraction runs were performed with Western Kentucky No. 6 coal and Conoco Philips decant oil at a solvent to coal ratio of 10:1, 390 oC and 200 psi (1.37 MPa) N

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Solvent Extraction of Coal - ScienceDirect

All solvent extraction processes currently being developed involve treatment of coal with recycle solvent, rich in aromatics and hydroaromatics, between 400 and 450°C. Their differences lie in the sequencing of steps, such as solvent rehydrogenation, operating conditions, and methods of solids separation.

10.6. Direct Liquefaction Processes | netl.doe.gov

The DCL process involves adding hydrogen (hydrogenation) to the coal, breaking down its organic structure into soluble products. The reaction is carried out at elevated temperature and pressure (e.g., 750 to 850°F and 1,000 to 2,500 psia) in the presence of a solvent. The solvent is used to facilitate coal extraction and the addition of hydrogen.

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(401g) Extraction of Phenolics from Coal By Deep Eutectic ...

Coal is a material that can benefit from the use of DES’s. Traditional solvents have already been researched in an attempt to dissolve select compounds form coal [3]. DES’s, which have shown to be effective solvents for a wide variety of organic compounds, can be used with coal to extract select compounds, or a set of compounds with similar characteristics.

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DEVELOPMENT OF CONTINUOUS SOLVENT EXTRACTION ... - .

Apr 13, 2005 · The purpose of this DOE-funded effort is to develop continuous processes for solvent extraction of coal for the production of carbon products. These carbon products include materials used in metals smelting, especially in the aluminum and steel industries, as well as porous carbon structural ...

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Coal Structure and Properties - EOLSS

one of the best solvents for coal, produce extraction yields in the range of 2–40 wt% on a water- and mineral matter-free basis. The dependence of pyridine extraction yields on the carbon percentage of coals has a maximum of around 85–88 carbon %. Quinoline extraction at 300°C produces a yield of 50% for bituminous coals, although it is

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Supercritical multicomponent solvent coal extraction ...

Jun 14, 1983 · The yield of organic extract from the supercritical extraction of coal with larger diameter organic solvents such as toluene is increased by use of a minor amount of from 0.1 to 10% by weight of a second solvent such as methanol having a molecular diameter significantly smaller than the average pore diameter of the coal.

  • Authors: William H Corcoran · William S Fong · Puvin Pichaichanarong · Paul C F Chan · Danie.About: Particle size · Dispersion · Energy technology · Energy policy · Toluene · Organic com.Get Price

Sequential solvent extraction for the modes of occurrence ...

Dec 20, 2007 · Up to 50% of the selenium in the overburden samples was ion exchangeable (an average of 21%). Selenium was sorbed by clays and other phases in the overburden samples. Querol et al. studied the forms of Se in a subbituminous Spanish coal with an ash yield of 26.5% by sequential solvent extraction.

COAL DE-ASHING BY SOLVENT EXTRACTION | Umar | Indonesian ...

High ash content is not preferred by consumers of coal users especially coal fired power plants, because ash content will produce fly ash and bottom ash that cause environmental problem. The process of ash content reduction by solvent extraction would produce coal with very low ash content (near zero) known as ash free coal (AFC).

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Use of solvents for PAHs extraction and enhancement of the ...

The direct solvent extraction method using acetone as an extraction solvent was shown to be. equivalent to the Soxhlet extraction method (EPA Method 3540). In this study, five coal-tar-. contaminated soils from four manufactured gas plant (MGP) sites in Iowa were used.

  • Authors: Pakhing LeeAbout: Environmental engineeringGet Price

Coal | Facts, Uses, & Types | Britannica

Four general methods are used for liquefaction: (1) pyrolysis and hydrocarbonization (coal is heated in the absence of air or in a stream of hydrogen), (2) solvent extraction (coal hydrocarbons are selectively dissolved and hydrogen is added to produce the desired liquids), (3) catalytic liquefaction (hydrogenation takes place in the presence of a catalyst—for example, zinc chloride), and (4) indirect liquefaction .

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