process of naphthalene production from coal tar

Comparative study of the carbonization process and structural evolution ...

Comparative study of the carbonization process and structural evolution ...

WEBJun 1, 2021 · Coal feedstock is mainly lowtemperature coal tar and hightemperature coal tar. Lowtemperature coal tar contains a large amount of phenolic compounds, such components are difficult to be removed in the coking process and might produce a great impact on the structure of carbonization products. On the contrary, the oxygen content of .

Chemicals from tar processing

Chemicals from tar processing

WEBJan 1, 1980 · Given the same feedstock coal, the tar yield in coking plants with a high carbonization t e m p e r a t u r e is only about Chemicals from tar processing 295 LowTemperature Coal Tar Yield, related to Coal Aliphatic Hydrocarbons Phenols Naphthalene Phenanthrene / Anthracene Pitch 10 % 10 % 25 % 3% 1 35 % % HighTemperature .

A study on upgrading light coal tar to aerospace fuel

A study on upgrading light coal tar to aerospace fuel

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.

The hydrodeoxygenation, hydrogenation, hydrodealkylation and .

The hydrodeoxygenation, hydrogenation, hydrodealkylation and .

WEBMar 24, 2017 · The results show that the hydrogenation reaction of phenolic compounds and the hydrogenation reaction of naphthalene in coal tar hydrogenation process are the key factors for the change of coal tar hydrogenation. ... As the reaction pressure increased from 7 to 11 MPa, the production rate of gasoline increased from to %. This ...

Purifiion of Naphthalene from Coal Tar Distillate by .

Purifiion of Naphthalene from Coal Tar Distillate by .

WEBFeb 15, 2007 · The morphologies of crystals were compared in both solution and melt crystallizations. The solution crystallization using methanol proved to be the better technology to separate naphthalene from naphthalenerich oil. The purity of the crystals has been upgraded over wt% by a solution crystallization.

Naphthalene Production | PDF | Petroleum | Hydrocarbons

Naphthalene Production | PDF | Petroleum | Hydrocarbons

WEBThe document summarizes several commercial processes for producing naphthalene: 1. Recovery from coal tar through distillation of the tar acidfree chemical oil in columns to remove light components and produce a 780C naphthalenerich bottoms. 2. Production from petroleum using processes like the Unidak process involving fractionation and .

(PDF) Directional preparation of naphthalene oilrich tar from .

(PDF) Directional preparation of naphthalene oilrich tar from .

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

Separation of Coal Tar into Fractions using Distillation Columns of ...

Separation of Coal Tar into Fractions using Distillation Columns of ...

WEBOct 13, 2022 · The results may be used in developing technology for deriving coal tar as a single fraction of specified composition and also for the production of individual compounds that are promising for ...

Carbon precursors in coal tar: Extraction and preparation of carbon ...

Carbon precursors in coal tar: Extraction and preparation of carbon ...

WEBSep 20, 2021 · Except for the main product, coke, many byproducts, such as coke oven gas and tar, supervene in the coking process. Besides, the coal tar concomitants are produced in the mediumtemperature pyrolysis process for semicoke production and the lowtemperature pyrolysis process for the production of oil products, respectively, .

Purifiion of Naphthalene from Coal Tar Distillate by .

Purifiion of Naphthalene from Coal Tar Distillate by .

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 ...

Some aspects of the chemistry of coal tars. I. Chemical nature

Some aspects of the chemistry of coal tars. I. Chemical nature

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 ...

Naphthalene Production Cost Analysis from Coal Tar

Naphthalene Production Cost Analysis from Coal Tar

WEBThis report proffers the detailed cost evaluation of the production of naphthalene from coal tar. In this process, the coal tar is subjected to the distillation and fractionation process. Further, the middle fractions, which contain most of the naphthalene, are cooled and crystalized to yield crude naphthalene. Lastly, the crude naphthalene is ...

Naphthalene | C10H8 | CID 931

Naphthalene | C10H8 | CID 931

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 .

Controlled separation of coal tar based on different temperature

Controlled separation of coal tar based on different temperature

WEBDec 15, 2019 · 1. Tar properties. Coal tar consist of complex hydrocarbon [1] with a wide molecular weight range which make it as a black, viscous liquid [2].It mainly comes from coal carbonization [3] and fast pyrolysis process (biomass gasifiion [4], biomass pyrolysis [5], coal gasifiion [6] and coal pyrolysis [7]).Its amount for mass % .

Summary Of Emissions Associated With Sources Of Naphthalene

Summary Of Emissions Associated With Sources Of Naphthalene

WEBIn the oxidation process, coal tar naphthalene and/or oxylene is vaporized, mixed with air and fed to the reactors. ... SUMMARY OF NAPHTHALENE EMISSIONS FROM ALL SOURCES Emission Source Coke byproduct recovery Naphthalene production Coal tar Petroleum Naphthalene end uses Inadvertent sources* Total All Sources Source .

A Critical Review of Naphthalene Sources and Exposures .

A Critical Review of Naphthalene Sources and Exposures .

WEBJul 20, 2010 · Based on the generation mechanism, naphthalene is emitted as a product of incomplete combustion,, from wood, straw, tobacco, gasoline and diesel combustion, and from evaporation or sublimation of naphthalenecontaining materials,, coal tar, crude oil, petroleum products, moth repellents and air fresheners.

Naphthalene

Naphthalene

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 .

OCCUPATIONAL EXPOSURES DURING COALTAR DISTILLATION

OCCUPATIONAL EXPOSURES DURING COALTAR DISTILLATION

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 ...

Research on the Processing of Coal Tar and Raw Benzene at AO

Research on the Processing of Coal Tar and Raw Benzene at AO

WEBJul 2, 2021 · From its founding, the Eastern Research Institute of Coal Chemistry (AO VUKhIN) has studied not only coal and metallurgicalcoke production but also coking byproducts such as coal tar and raw benzene. The first research in this area, directed by Postovskii (appointed to the Soviet Academy of Sciences in 1970), focused on .

Rectifiion analysis of the naphthalene fraction of coal tar

Rectifiion analysis of the naphthalene fraction of coal tar

WEBThe results of a rectifiion analysis of the naphthalene fraction of coal tar from the Nizhnetagil'skii Metallurgical Combine make it possible to identify ways of improving the manufacturing process for producing technical grade naphthalene by the rectifiion method. 5 diagrams, 3 tables, 8 references. No Paper Link Available.

How To Start A Lucrative Coal Tar Production and Supply .

How To Start A Lucrative Coal Tar Production and Supply .

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, .

Energy analysis study of coal tar distillation process by feed ...

Energy analysis study of coal tar distillation process by feed ...

WEBOne valuable compound is naphthalene. The coal tar Received 5 November 2021 evaluation process of its constituent components is carried out by distillation, with a high level of Accepted 6 November 2021 Available online on 7 November 2021 production process of coke and gas from coal.

Pyrolysis behavior of tarrich coal with various coalforming ...

Pyrolysis behavior of tarrich coal with various coalforming ...

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].

Coal Tar Suppliers in India | IBMD | Tata Steel

Coal Tar Suppliers in India | IBMD | Tata Steel

WEBNaphthalene produced during the distillation of coal tar is crude in nature. Crude Naphthalene is used in the production of tanning agents, disinfectants etc. It undergoes further fractional distillation to produce some downstream products like sulphonated naphthalene (SNF) and Poly Carboxylate Ether (PCE). PCE is used as a ...

Refining of Coal Tar by Hydrogenation in the Presence of

Refining of Coal Tar by Hydrogenation in the Presence of

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 .

Product compositions from alytic hydroprocessing of low

Product compositions from alytic hydroprocessing of low

WEBAug 17, 2016 · Coal tar, as a byproduct, is obtained mainly from the process of coal pyrolysis and accounts for – % of the feed coal, this means that the worldwide yield is related to the amount of coke [2, 4], and if those can be used to produce clean liquid fuel, a considerable amount of potential energy will be obtained. Hence, a highly efficient ...

Conceptual Design and Development of an EnvironmentFriendly Process .

Conceptual Design and Development of an EnvironmentFriendly Process .

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 .

Efficient separation of phenols from coal tar with aqueous .

Efficient separation of phenols from coal tar with aqueous .

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, .

Naphthalene—an environmental and occupational toxicant

Naphthalene—an environmental and occupational toxicant

WEBAug 15, 2003 · The industrial production of naphthalene is predominantly based on crystallisation and distillation of coal tar, which is condensed and separated from coke oven gases. Those fractions containing the naphthalene oil are further processed to produce naphthalene of different purities depending on its final use.

Coal Tar

Coal Tar

WEBCoal tar. María Antonia Diez, Roberto Garcia, in New Trends in Coal Conversion, 2019. Concluding remarks. With coal tar as a byproduct from cokemaking, coal tar availability will continue to depend on the consumption of coke in the blast furnace for iron and steel production. Thus, the conditions of coke production in recovery coke ovens .

Resources, properties and utilization of tar

Resources, properties and utilization of tar

WEBSep 1, 2010 · Tar is an unavoidable waste or a byproduct during biomass thermal conversion process (–20% in biomass gasifiion, main product in biomass pyrolysis) or fossil thermal conversion (coal gasifiion, or liquefaction), whose utilization has an important influence on the efficiency of energy resource. Tar as resource and energy is .

Recent advancement in coal tar pitchbased carbon fiber .

Recent advancement in coal tar pitchbased carbon fiber .

WEBSep 1, 2021 · Thermal treatment mentioned in this article is a low temperature pyrolysis process of coal tar pitch. Temperature is limited to 450 °C maximum. ... There is difference in properties for naphthalene derived mesophase and coal tar pitch derived mesophase ... It is important to know which method is better in production of microporous ACFs.

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