Historical background of quinoline. Historically, cinchocaine was the first local anesthetic to be synthesized from the quinoline-based group. 24 In 1834, quinoline was first discovered and isolated by Friedlieb Ferdinard Runge from coal tar. 25,26 It belongs to the alkaloid family and is a secondary metabolite under the nitrogen-containing natural …
This work studies the utilization of a binder grade industrial tar with an inherent content in primary quinolone insoluble particles (QIs) and the correspondent …
Semantic Scholar extracted view of "The influence of the type of quinoline insolubles on the quality of coal tar binder pitch" by D. R. Ball. Skip to search form Skip to ... @article{Ball1978TheIO, title={The influence of the type of quinoline insolubles on the quality of coal tar binder pitch}, author={David Ralph Ball}, journal={Carbon}, year ...
DOI: 10.1016/J.FUEL.2017.05.099 Corpus ID: 102923241; Role of quinoline insoluble particles during the processing of coal tars to produce graphene materials @article{FernndezGarca2017RoleOQ, title={Role of quinoline insoluble particles during the processing of coal tars to produce graphene materials}, author={Laura Fern{'a}ndez …
Coal tar pitch is a residue of coal tar distillation and can be processed suitably to produce hard pitch of desired quality in terms of softening point (SP), benzene insoluble (BI), quinoline ...
1. Introduction. Coal tar pitch (CTP), a byproduct obtained from processing coal tar, accounts for about 2.4 wt.%–3.6 wt.% of the total output of coke.Worldwide coke outputs reached 6.3 × 10 11 kg in 2010, of which around 5–7 Mt was CTP. Although CTP has high carbon content and is applicable in the fabrication of various advanced carbon …
Seven pitches containing three types of quinoline insolubles, QI, were produced from a single coke oven coal tar. The tar was centrifuged into QI-rich and QI …
Quinoline is a nitrogen-based heterocyclic aromatic compound with systematic IUPAC name as benzo[b]pyridine or 1-aza-naphthalene with the C 9 H 7 N chemical formula.It exhibits chemical reactivity similar to the benzene and pyridine ring system as it undergoes nucleophilic and electrophilic substitution reactions [].Quinoline …
Quinoline insolubles (QI) in medium-temperature coal tar were obtained by using a self-made coal tar filter, and the composition and structure of QI were …
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. ... Q. Purification of Quinoline Insolubles in Heavy Coal Tar and Preparation of Meso-Carbon Microbeads by Catalytic ...
@misc{etde_7970627, title = {Study on effective separation of quinoline insolubles from coal tar} author = {Iwahashi, Toru, and Sunami, Yoshihiko} abstractNote = {On the separation of quinoline insolubles(QI) by use of solvent extraction, it was found that ketones solvents were superior in coarse graining or the separation of QI. Sample oil …
The quinoline-insoluble (QI) matter in coal tar and coal tar pitch is an important factor affecting the properties of subsequent carbon materials. In this paper, catalytic polycondensation was used to remove QI from heavy coal tar, and meso-carbon microbeads could be formed during the purification p …
2.2. Occurrence in nature of quinoline and isoquinoline alkaloids. The quinoline and isoquinoline alkaloids were initially extracted from coal tar in 1834 and 1835, respectively. Quinoline, which has high boiling temperature, is commonly employed in organic synthesis as a solvent.
Influence of coking conditions on the content of quinoline-insoluble components in coal tar. Full size image. The content of the ≤3 mm class of coal has the …
The quinoline-insoluble (QI) matter in coal tar and coal tar pitch is an important factor affecting the properties of subsequent carbon materials. In this paper, catalytic polycondensation was used to remove …
The interest for the structural composition and texture of toluene-insoluble (TI) and quinoline-insoluble (QI) in coal–tar pitch – as raw and coked material – is both scientific and practical. It can provide valuable information about the carbonization behaviour of coal–tar pitch fractions and the thermo-chemical process evolution ...
The basic properties (fa, β resin, quinoline insoluble) of coal tar pitch have greatly affects on the quality of coal-based needle coke were generally accepted by researchers.
This paper analyzes the status of QI in coal tar pitch, considering knowledges of smashing by high-speeding gas and gas cyclones, a means of removal of QI is advanced that liquid of coal tar pitch ...
The company is located in Luqiao Chemical Industry Park, Huanghua City, Hebei Province, more than 200 kilometers away from Beijing and 100 kilometers away from Tianjin. With …
Coal tar is recovered and distilled in Canada to produce oils (naphthalene, creosote, and carbon black feedstock) and coal tar pitch. Quinoline is a natural component of coal tar-based products which are used in wood preservation, aluminum smelters, graphite electrodes, specialty carbon products, pavement coatings/sealants and refractory products.
Coal tar pitch (CTP) is usually used as raw material to prepare mesophase pitch and needle coke [1,2]. Essentially, the group composition (including quinoline-insoluble (QI) and heteroatoms' content), C/H atom ratio, naphthenic and aliphatic side chain structure of raw pitch are quite critical to the preparation of mesophase [3–6].
sent in coal tar pitch. For an efficient extraction process, mixing between coal tar and the added solvent was conducted under pressurized and heated conditions. The aliphatic components in the extraction solvent are believed to facilitate the precipitation of QI in coal tar pitch by undermining the stabilized dissolution state of QI [14].
2.2. Occurrence in nature of quinoline and isoquinoline alkaloids. The quinoline and isoquinoline alkaloids were initially extracted from coal tar in 1834 and 1835, respectively. Quinoline, which has …
The quinoline-insoluble (QI) matter in coal tar and coal tar pitch is an important factor affecting the properties of subsequent carbon materials.
• Implement protective strategies on coal tar lined pipes when removal of coal tar is not feasible. For example, encapsulate coal-tar linings with new NSF-approved linings to prevent coal tar from contacting and leaching quinoline into drinking water, or insert a smaller pipe inside the existing coal tar lined pipe, a technology known as slip ...
In the present study, Quinoline Insolubles in the coal tar are removed by centrifugation process. Studies were carried out with different wash oils, organic and mixed solvents. Removal of Quinoline Insolubles from coal tar is 88% at 60–70 °C with 15% wash oil dosage at an optimized time of 5 mins and 4500 rpm. Removal of Quinoline …
Highlights Electrostatic field has been successfully applied to the removal of QI and ash in coal tar pitch. Removal efficiency for QI and ash is 100 wt.% and 80.5 wt.%, respectively. Comparing with centrifugal method for removal of QI and ash, electrostatic field decreases by 88% of energy consumption. Equilibrium between desorption and …
The carbonization in a tube bomb of medium-temperature coal tar pitch and the purified coal tar pitch, of which quinoline insoluble (QI) had been removed by anti-solvent method, was comparatively ...
An impure quinoline was first obtained from coal tar by Runge 1 in 1834, and in 1842 Gerhardt 2 obtain it as a degradation product from quinine and cinchonine, later it was called quinoline. Coal tar also contains isoquinoline as well as several alkyl quinolines and alkyl isoquinolines, which are difficult to separate, and it was some years …
The impregnating-grade coal tar pitch is a special type of coal tar pitch which has a low content of quinoline insoluble (0–3%) and toluene insoluble (16-24%), besides having suitable values of ...
Study on the Basic Physical Properties of Quinoline Insoluble Components from Coal Tar Pitch and Micro-structure of Its Derived Pitch Carbon: YUE Li 1, ZHU Yaming 1,2, GAO Lijuan 1, HU Chaoshuai 1,2, LAI Shiquan 1, ZHAO Xuefei 1,2: 1 School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China; 2 …
Removal of Quinoline Insolubles from coal tar is 88% at 60–70°C with 15% wash oil dosage at an optimized time of 5 mins and 4500 rpm. ... mainly manufactured by the petrochemical industry ...
On the basis of type, the quinoline market is segmented into coal tar extraction, doebner von miller synthesis and skraup synthesis. The quinoline market on the basis of the …
The quinoline-insoluble (QI) matter in coal tar and coal tar pitch is an important factor affecting the properties of subsequent carbon materials. In this paper, catalytic polycondensation was used to remove QI from heavy coal tar, and meso-carbon microbeads could be formed during the purification process. The results showed that …
David R. Ball, "The Influence of the Type of Quinoline Insolubles on the Quality of Coal Tar Binder Pitch," Carbon, vol.16, 1978, 205–209. Article Google Scholar . Robert H. Wombles, John Thomas Baron, "Laboratory Anode Comparison of Chinese Modified Pitch and Vacuum Distilled Pitch," Light Metals 2006, 2006, 535–540.
The carbonization in a tube bomb of medium-temperature coal tar pitch and the purified coal tar pitch, of which quinoline insoluble (QI) had been removed by anti-solvent method, was comparatively ...
Coal Carbonization. John C. Crelling, in Applied Coal Petrology, 2008 7.5 Quinoline Insolubles. One of the main byproducts from carbonization is coal tar (∼8–12 gallons per ton of coal). It is usually refined into coal tar pitch, which is used to make chemicals, roofing and road tar, pipe enamels, and binder pitch in the manufacture of baked …
Quinoline is used in the manufacture of dyes (Lam et al. 2012) which is used in textile industries.Quinoline and its derivatives such as isoquinoline and methylquinoline (Fig. 9.1) have been found in clothing textiles, and it is a possible source of human exposure (Dik et al. 2014).It has been used as a component of creosote which is …
