US4986895A
ResultPitch substantially free from primary and secondary QI components and solids comprising secondary QI components are prepared by centrifuging coal tar or coal tar pitch at a high temperature, heat-treating the separated supernatant liquid and centrifuging again the liquid at a high temperature.
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Coal Tars and Coal-Tar Pitches
ResultCancer Studies in Humans. Numerous studies, mostly case reports, have found that occupational exposure to coal tars or coal-tar pitches (coal-tar distillates) is associated with skin cancer, including scrotal cancer; workers in these studies have included patent-fuel (coal-briquette) workers, pitch loaders, workers …
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Recent advancement in coal tar pitch-based carbon fiber …
ResultTreatment of coal tar pitch with nitric acid [10], nitrobenzene [11] and even bromination followed by debromination [12] has been done to reduce the heat treatment temperature so that mesophase formation gets supressed and pure isotropic pitch is generated. Following sections will illustrate on the precursor …
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Health Policy Brief: Coal Tar & Coal-Tar Pitch
Resultthat contains mostly carbon and coal gas. Coal-tar pitch, however, is produced through the distillation or heat treatment of coal tar. Though related, coal tar and coal-tar pitch are distinct. A chart demonstrating the process of how coal tar becomes coal-tar pitch is below.[2] sealcoat off gases dangerous chemical …
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A study on the effect of heat treatment temperature on …
ResultIn the present study, a zero quinoline insoluble (QI) isotropic coal tar pitch was taken for the preparation of mesophase pitch. The pitch was heated in inert atmosphere at different heat treatment temperatures keeping same heating rate and soaking time to study the formation, growth and coalescence of mesophase …
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Systematic mapping of studies on coal tar and pitch over …
ResultCoal 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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Tar and Pitch
ResultThe term 'pitch' or 'tar pitch' refers to the more viscous, semi-sold or solid fraction of tar (Betts, 2000; Collin and Höke, 2005;Legasse, 2012). Pitch is also sometimes confusingly employed to ...
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Coal Tar and its Distillation Processes – IspatGuru
ResultThe normal yield of coal tar during the coal carbonizing process is around 4 %. Coal tar has a specific gravity normally in the range of 1.12 to 1.20, but exceptionally it can go upto 1.25. It depends on the temperature of carbonization. The lower specific gravity tars are generally produced when low carbonization …
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Recent advancement in coal tar pitch-based carbon fiber …
ResultPitch modification process can be categorized by heat treatment method or by chemical treatment method. All these processes are described in …
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EP0153419A1
ResultA process for obtaining pitch containing a substantially pure secondary QI component alone, which comprises centrifuging coal tar or coal tar pitch at high temperatures, and heat-treating the obtained supernatant. This heat-treated supernatant may be again centrifuged at high temperatures to obtain pitch …
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Slow Pitch Jigs w/Jig Bag – Flat Slow Pitch Jigging Fall …
ResultThe butterfly flat-fall jigs are an effective vertical jig for many species of offshore and inshore fish. Deadly target at Bluefin Tuna, Yellowfin Tuna, Dorado, Yellowtail, Jacks, Rockfish, Grouper, Dogtooth and More deep sea fishes. Features: Streamlined Body Design helps the jig present appealing movements and multiple …
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WO1985001057A1
Resultc10c — working-up pitch, asphalt, bitumen, tar; pyroligneous acid C10C1/00 — Working-up tar PCT/JP1984/000415 Process for treating coal tar or coal tar pitch WO1985001057A1 ( en )
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Coal Tar Pitch – IspatGuru
ResultIts IUPAC name is 'Coal Tar Pitch, High temperature". Its CAS number is 6 and EINECS number is 266-028-2. It is the shiny, dark-brown to black residue produced by distillation of coal tar. Coal tar pitch contains a large number of substances. It is solid at room temperature and consists of a complex …
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Process for treating coal tar or coal tar pitch
ResultProcess for treating coal tar or coal tar pitch Download PDF Info ... A EP84903288 A EP 84903288A EP 0153419 B1 EP0153419 B1 EP 0153419B1 Authority EP European Patent Office Prior art keywords coal tar temperature pitch centrifugation heat Prior art date Legal status (The legal status is an assumption and …
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Effect of Process Parameter on Coal Tar Distillate Products
ResultDistillation assembly for synthesis of coal tar pitch. Figure 3. Flow diagram of the process for making QI free coal tar pitch. 5. Conversion of Coal Tar to Coal Tar Pitch Samples Experiments were carried out to prepare binder grade coal tar pitch from distillation of coal tar of Drum 1, Drum 2, Drum 3 and Drum 4.
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Effect of nanosilicon carbide on the carbonisation process of coal tar
ResultCoal tar pitch (CTP) is a quite promising candidate for the production of porous carbons. Traditionally, the porous carbons are prepared by the heat treatment of carbon precursors in the presence ...
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In-situ elimination of biomass gasification tar based on the
ResultTar yield increased with the ratio of steam to biomass (S/B), which may cause by the lower reaction temperature; The lowest tar yield was obtained to be 9.11 g/Nm 3 at an S/B of 1.5; The highest tar yield was obtained to be 17 g/Nm 3 at an S/B of 4.5. [94] Downdraft Gasifier Tar yields and composition were influenced …
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Preparation of formed coke product as a coke substitute …
ResultIn addition, coal tar pitch has a similar composition to coke breeze and low impurity content, making it an optimal binder for preparing formed coke products using coke breeze [9], [21], [28], [29], [30]. However, the binding of coal tar pitch is poor until it is heated to a molten state, which makes its utilization …
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Coal Tar and Coal-Tar Pitch
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Flow diagram of coal to coal-tar-pitch process
…Does coal tar pitch need to be modified before spinning?Impurities in material will cause stress in the fiber and it will break during spinning. Therefore, to overcome these problems, coal tar pitch is required to be modified before spinning. Precursor modification is the first step in the processing of carbon fiber from coal tar pitch. Modification can be done in different ways.Recent advancement in coal tar pitch-based carbon fiber precursor
…What methods are available for the analysis and testing of coal tar pitches?This chapter discusses the methods available for the analysis and testing of coal tar pitches. It discusses the methods of production of coal tar pitches, types of pitches, their fields of application, and characterization. Solvent analysis methods may be divided into two types, the preparative and purely analytical.Analysis of Coal Tar Pitches
…What is the difference between coal tar pitch derived mesophase and TG analysis?TG analysis showed that there is continuous decrease in weight with increasing the temperature. This results in constant release of volatiles which affects the crystallinity of the fiber. On the other hand, coal tar pitch derived mesophase gets cross linked with oxygen and produces stable products.Recent advancement in coal tar pitch-based carbon fiber precursor
…FeedbackHealth Policy Brief: Coal Tar & Coal-Tar Pitch
Web ResultCoal tar is the byproduct of the high-temperature treatment of coal, which makes the energy fuels coke and natural gas. Coal-tar pitch is a coal tar product …
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Coal Tar Pitch-Past, Present, and Future | SpringerLink
ResultThese by-product ovens produced coal tar as one of the major by-products. An industry developed around distillation of coal tar to produce various products. One of the major products produced is coal tar pitch. Since that time, coal tar pitch has become the binder of choice for the aluminum, commercial carbon, and graphite …
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Coal Tars and Coal-Tar Pitches
ResultUse. Coal tars and coal-tar pitches have many uses in industry and in consumer products. Coal tars are used primarily for the production of refined …
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COAL TAR PITCH-PAST, PRESENT, AND FUTURE
Resultcoal tar or coal tar pitch as a result of thermal treatment is called mesophase or secondary Ql. The mesophase content of coal tar or coal tar pitch is determined …
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DEVELOPING COAL TAR/PETROLEUM PITCHES
ResultThese strategies have included: 1) importing coal tar, 2) importing coal tar pitch, 3) developing processes to improve pitch yield and upgrade non-conventional coal …
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What Is Tar and How Is It Used? | asiagilsonite
ResultTar or pitch, is a highly versatile, black, and viscous liquid substance that is obtained through pyrolysis or carbonization of organic materials. It has numerous applications and is widely used in many industries, such as road paving and roofing. Composed of varying complexities of molecules, this mineral's …
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Use of tar pitch as a binding and reductant of BFD waste to …
ResultThe thermal behavior of the tar was investigated by TG analyses in an N 2 atmosphere (Fig. SM-2).Pure tar pitch decomposes to volatile organics, CO x and H 2 O with approximately 94% weight loss in the temperature range of 200–500 °C to form only 6% carbon. Similar thermal decomposition profiles were observed …
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Flow diagram of coal to coal-tar-pitch process
ResultCoal tar is a byproduct of the coking, liquefaction, or gasification of coal. Coal-tar pitch is the residue that remains after the distillation of coal tar. Coal tar and coal-tar pitch are used in coal-tar-based …
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WO/1985/001057 PROCESS FOR TREATING COAL TAR OR COAL TAR PITCH
ResultA process for obtaining pitch containing a substantially pure secondary QI component alone, which comprises centrifuging coal tar or coal tar pitch at high temperatures, and heat-treating the obtained supernatant. ... WO1985001057 - PROCESS FOR TREATING COAL TAR OR COAL TAR PITCH. Publication …
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Coal Tar Pitch-Past, Present, and Future | SpringerLink
ResultHome. Essential Readings in Light Metals. Chapter. Coal Tar Pitch-Past, Present, and Future. John T. Baron, Stacey A. McKinney & Robert H. Wombles. Chapter. …
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Pitch Pines and Tar Burners: A 1792 Account | Coastal …
ResultThe Englishman concluded his discussion of North Carolina's naval stores industry with the making of pitch, which is really just more refined tar. In Way's day, pitch was widely used in shipbuilding for caulking and to waterproof the seams in barrels and kegs. Way noted that the tar burners in North Carolina made …
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Coal Tar Pitch Roofing Explained | Roof Online
ResultA layer of coal tar pitch that has been applied to the roof and the layer of reinforcing felts that are set into it is called a "ply". One ply in a finished coal tar roof is usually an eighth to a quarter of an inch thick. Typical coal tar pitch built-up roofs have four or five plies. At the end of the installation, gravel is typically set ...
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