WEBEnergy analysis study of coal tar distillation process by feed splitting method. Coal tar is a high viscosity liquid and has a black color which formed as a byproduct of the production process of ...
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WEBFeb 15, 2024 · The potential oil resources, such as coal tar extracted from tarrich coal in Shaanxi Province, can reach times higher than the proven oil reserve in China and times of that in the United States [9]. The petroleum potential of tarrich coal has received considerable attention from scholars [10], [11], [12].
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WEBNaphthalene, derived from coal tar, is a volatile white solid substance with a unique odor. Accounting for 10% of coal tar, naphthalene is mainly used in the production of plastics, dyes, concrete additive, and moth repellent. ... CSCC produces refined naphthalene through process of refining naphthalene. As one of the leading tar distillers in ...
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WEBJun 1, 2014 · The fractions of coal tar were typified in terms of a few boiling point ranges, as listed in Table 2. Herein, the light tar was defined as the total fraction having boiling point below 360 °C, which is the sum of the fractions for light oil, phenol oil, naphthalene oil, wash oil and anthracene oil shown in Table 2.
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WEBJul 1, 2014 · Rate models for dewatering of the coal tar and the distillation, separation and purifiion of phenols, nitrogen heterocyclic compounds and absorber oil, production of industrial naphthalene and ...
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WEBJul 15, 2023 · Coking chemistry is the subject of relative theories, technologies, processes, and equipment of process where main material coal in the condition of isolating air is researched, and coal is transformed into coke (or semicoke) and raw gas after physicochemical action like thermolysis and coking, and the raw gas is purified and .
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WEBAug 1, 2023 · Coal tar is the primary source for many basic chemicals and also provides raw materials for a number of other industries. This paper aims to present a systematic mapping and a brief review of the study areas related to coal tar/pitch over the past 50 years based on a search in the Scopus database.
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WEBFeb 15, 2024 · Tarrich coal, abundant in northwestern China, undergoes variations in the coalforming environment, resulting in diverse occurrences of tarrich coal and its molecular structures across regions and layers. The pyrolysis process of these coals also differs accordingly. This study investigated four coal samples with different tar yields and ...
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WEBAug 30, 2020 · Abstract The refining of coal tar by hydrogenation is considered. In this process, nanoheterogeneous Nibased alysts may expediently be produced in situ from precursors in the reaction medium. The yield of needle coke in complete coal processing with recirculation of the residue at the coking stage is found to be 50–55%. That is .
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WEBProduction. Most naphthalene is derived from coal tar. From the 1960s until the 1990s, significant amounts of naphthalene were also produced from heavy petroleum fractions during petroleum refining, but today petroleumderived naphthalene represents only a minor component of naphthalene production. Naphthalene is the most abundant .
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WEBJan 14, 2016 · The main feedstock for naphthalene production is coal tar. At an average content of around 10%, naphthalene represents the most important compound in hightemperature coal tar (cokeoven tar) in terms of quantity. It can already be concentrated to over 90% in primary tar distillation, in the naphthalene fraction boiling between 210 and .
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WEBCoaltar pitch is the residue from the distillation of coal tar (Betts, 1997). The largest source of tar and pitch is the pyrolysis or carbonization of coal. Until the end of the Second World War, coal tar was the main source of benzene, toluene, xylenes, phenol, cresols and cresylic acids, pyridine and methylpyridines, naphthalene, anthracene ...
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WEBDynamic optimal control of coal tar chemical looping gasifiion based on process modelling and intelligent screening. Journal of Cleaner Production (IF ) Pub Date: , DOI: ... Utilisation of coal tar naphthalene oil fractions for the synthesis of valueadded chemicals: alternative paths to mono and dimethylnaphthalenes ...
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WEBJan 7, 2003 · Rate models for dewatering of the coal tar and the distillation, separation and purifiion of phenols, nitrogen heterocyclic compounds and absorber oil, production of industrial naphthalene and ...
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WEBMar 19, 2023 · There are several types of Coal Tar Production and Supply Businesses in Nigeria and Africa, including: Coal tar distillation plant: This type of business involves the distillation of coal tar to produce various products such as creosote oil, naphthalene, and pitch. Coal tar pitch plant: This type of business focuses on producing coal tar pitch, .
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WEBOct 26, 2023 · Figure 7 shows that the addition of alkaline earth metal oxidesupported γAl 2 O 3 alyst can alyze the pyrolysis of coal and increase tar production 17. After adding γAl 2 O 3 and SrO/γ ...
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WEBSep 17, 2023 · article{Guo2023ConceptualDA, title={Conceptual Design and Development of an EnvironmentFriendly Process for Simultaneous Extraction of Phenol and Naphthalene Compounds from Tar}, author={Jingtao Guo and Chao Pan and Bingxiao Feng and Xiaomin Qiu and Quanhong Zhu and Hongbing Song and Hengjun Gai and .
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WEBMay 1, 2021 · But because that its relative density is higher than and asphaltene content is close to 50% [6] (mass fraction), hightemperature coal tar is not suitable for the production of aerospace fuel. Medium and low temperature coal tar is a liquid product with high condensation degree obtained by pyrolysis of lowrank coal at 600 to 800°C.
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WEBarticle{osti_, title = {Process for obtaining sulfur free pure naphthalene from bituminous coal tar and thionaphthene as a byproduct}, author = {Grigoleit, G and Koehler, H and Collin, G and Matern, K}, abstractNote = {In a process for obtaining substantially sulfur free pure naphthalene from bituminous coal tar and .
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WEBJan 15, 2014 · Section snippets The feedstock. A distillate of low temperature coal tar having a boiling point <300 °C was employed as the commercial low temperature coal tar was first produced through bituminous coal pyrolysis at 550 °C in a power feedstock was then obtained by distillation of this low temperature coal .
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WEBNov 1, 2019 · For a typical CLG process, the OC plays the multifunctional roles for the insitu tar conversion during the syngas production [9] (Fig. 1).From the viewpoint of the metal, the reduced OC could alyze tar for cracking or reforming in gasifiion [11], [12].From the viewpoint of the oxygen, the oxidized OC could provide with lattice oxygen .
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WEBFeb 1, 2008 · Naphthalene compounds derived from coal tar can be used in the production of synthetic pharmaceutical compounds [12,13] and synthetic chemicals as methylnaphthalenes, dimethylnaphthalenes [8,9,[14 ...
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WEBDownload Citation | On Dec 1, 2021, I. I. Melnikov and others published Naphthalene Production by Rectifiion of the Naphthalene Fraction from Coal Tar at MMK | Find, read and cite all the ...
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WEBMay 8, 2019 · Abstract The results of studies on the hydrogenation of a naphthalene fraction of coal tar performed to obtain highgrade sulfurfree naphthalene and highpurity benzene for organic syntheses and to increase the yield of naphthalene due to hydrodemethylation of its homologues from the feedstock are presented. It was .
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WEBJun 2, 2012 · Coal tar is a liquid byproduct of the process of coal gasifiion and carbonation. This liquid oil mixture contains various kinds of useful compounds such as phenol, ocresol, and pcresol.
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WEBIn the process of coaltar distillation, the distillate is collected into four fractions; ... The carbolic acid or naphthalene is generally extracted to be used in other commercial ... it is distilled during the production of water gas. The tar is a byproduct resulting from enrichment of water gas with gases produced by thermal decomposition ...
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WEBCall +1 800 752 8878. Published December 1976. This report concerns the recovery and purifiion or refining of byproduct chemicals from high temperature carbonization of coal. Process designs and cost estimates are given for coal tar fractionation, refining of light oil to produce BTX aromatics (benzene, toluene, and xylenes), refining of ...
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WEBFeb 1, 2020 · naphthalene oil of coal tar [3538]. Therefore, further explorat ions on the use of alysts to promote LRC pyrolysis staged utilization to produce naphthalene oilrich
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WEBFeb 23, 2024 · Additionally, the distillation process also produces coal tar oils, which are further processed to obtain lighter fractions like light oils and naphthalene. Moreover, the production and use of coal tar come with certain technical considerations. For instance, coal tar is highly flammable and should be handled with caution.
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WEBJul 1, 2021 · 1. Introduction. The lowtemperature coal tar is a byproduct in the process of coal pyrolysis under a lower temperature. It is an important organic chemical raw material containing thousands of compounds, in which phenols account for 20%–50% of its mass [1] and have a higher value for the production of synthetic resins, plant protection agents, .
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