vacuum distillation coal tar

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CN208667599U

The utility model discloses a kind of injection apparatus in coal tar deep processing vacuum distillation, are related to coal tar deep processing technical field.The utility model includes oil groove, the delivery outlet of oil groove is communicated with flushing oil pump by oil pipe, the delivery outlet for rinsing oil pump has been respectively …

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Coal tar waste utilization by cracking into fuel source and its

Coal tar waste utilization by cracking into fuel source and its separation using the fractional vacuum distillation method. June 2021. IOP Conference Series Earth …

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(PDF) Pitch-based carbon fibers from coal tar or petroleum …

The distillation of the parent tar, followed to obtain the soft coal tar pitch CTSP, promotes an extensive removal of alkyl- and aryl-substituted aromatic compounds which are subsequently present ...

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A solvent based separation method for phenolic

The separation of low-temperature coal tar (LTCT) containing solid particles by vacuum distillation is essential in various applications, such as in-situ pyrolysis. However, the separation characteristics of solid-containing LTCT using vacuum distillation have yet to be fully understood.

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Valuable Products from Coal Tar | Coke and Chemistry

Abstract Research on the production and properties of coal pitch is conducted in the laboratory at PAO Koks. One topic of interest is the distillation of coal tar to produce a broad tar and pitch fraction, whose quality is analyzed. It is possible to regulate the characteristics of pitch: its ash content and content of components insoluble in toluene …

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Pyrolysis behavior and chemical composition of the

CTP is the distillation residue of coal tar produced after coal carbonization. Low-temperature coal tar (LTCT) is composed of polycyclic aromatic hydrocarbon ... Then, pitch samples were prepared from the resultant coal tar at 460 °C for 1 h under vacuum distillation; this temperature was chosen on the basis of derivative thermogravimetry (DTG

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Characterization approach to develop distillation process for

Higher vacuum pressure of distillation is not necessarily high to meet specifications. ... Coal tar pitch is a residue of coal tar distillation and can be processed suitably to produce hard pitch ...

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Vacuum distillation and GC-MS analysis of coal tar in low …

The pyrolysis tar from Naomaohu coal was separated by distillation apparatus. Four components of heavy oil above 320°C were analyzed. The result showed the colloid content was 28.84% and the ...

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Recent advancement in coal tar pitch-based carbon fiber …

Starting from thermal processes like heat treatment, vacuum distillation, tar air blowing, to chemical treatments like nitric acid treatment, HF/BF 3 method, all methods have successfully produced spinnable precursors. However, further investigation on the effect of different foreign particles on mesophase formation from a thermodynamic point ...

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In this regard, coal tar is emerging as an alternative source of feedstock to the refiners for producing fuels. Vacuum distillation is the technique used to separate …

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Vacuum Distillation Of Crude Coal Tar(specifically Creosote …

For vacuum distillation of crude coal tar, (specifically creosote oil), the crude coal tar is produced from coke ovens of steel plant, 50% of this crude coal tar in pitch. Coal tar is essentially the thick & black viscous liquid which is obtained by the carbonization of coal, and is a by product in the ordinary manufacture of coal gas. ...

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Separation characteristics of low-temperature coal tar …

Separation characteristics of low-temperature coal tar containing solid particles by vacuum distillation: Effects of distillation pressure and solid particle …

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Separation characteristics of low-temperature coal tar

The low temperature coal pyrolysis technology and the atmospheric and vacuum tar distillation were combined to establish a low-rank coal based process system, which can co-produce semicoke, syngas ...

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(PDF) Investigation on Component Separation and Structure

(distillation residue) accounted for about half mass of the total MLCT, which belongs to coal tar pitch (mainly composed of polycyclic aromatic hydrocarbons), and was the main component of the ...

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Separation characteristics of low-temperature coal tar

Abstract. The separation of low-temperature coal tar (LTCT) containing solid particles by vacuum distillation is essential in various applications, such as in-situ pyrolysis. However, the separation characteristics of solid-containing LTCT using …

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Pitch-based carbon fibers from coal tar or petroleum

under strong nitrogen flow, and further vacuum distillation to obtain a high softening ... coal tar exhibited a molecular weight distribution in the range of 100–500, 200–800, and 150–700 ...

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Coal tar waste utilization by cracking into fuel

My Research and Language Selection Sign into My Research Create My Research Account English; Help and support. Support Center Find answers to questions about products, access, use, setup, and administration.; Contact Us Have a question, idea, or some feedback? We want to hear from you.

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Naphthalene Production by Rectification of the Naphthalene …

The initial naphthalene fraction is pumped directly from the existing system for coal-tar distillation to the store for the liquid material and the final product, which consists of two 800-m 3 tanks for storing the initial naphthalene fraction and two 400-m 3 tanks for storing the naphthalene produced [1, 4].

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Vacuum distillation and GC-MS analysis of heavy low-temperature coal

Seven fractions were isolated from heavy coal tar in low-temperature coal tar from Northern Shaanxi by vacuum distillation (1 kPa) at 100â, 100-170â, 170-200â, 200-240â, 240-270â, 270-300â and 300-340â, respectively.Their distillate compositions were characterized by gas chromatography/mass spectrometry (GC-MS).

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Value-added utilization of high-temperature coal tar: A review

Graphical abstract. High-temperature coal tar is an important raw material for obtaining value-added aromatics. The comprehensive processing route for value …

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Separation and Composition Analysis of GC/MS Analyzable …

Composition analysis of coal tar remains a challenging task because of its complex components. In this paper, the compositions of low temperature coal tar (LTCT) and the wash oil fraction of high temperature coal tar (HTCT) were studied. A thermogravimetric analyzer (TG) combined with gas chromatography–mass …

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Characterisation of coal tar pitches by thermal analysis, …

Four commercially available coal tar pitches are used as raw materials. Bilbaina de Alquitranes S.A., Spain, produces pitches A and B by heat treatment of coal tar to 653 K and Industrial Quı́mica del Nalón, Spain, prepares pitches C and D by vacuum distillation of coal tar to 653 K. The pitches were fractionated with quinoline and …

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Heavy coal tar vacuum catalytic distillation method

A catalytic distillation and coal tar technology, applied in the field of coal chemical industry, to achieve the effect of improving the extraction rate ... Free Trial. Heavy coal tar vacuum catalytic distillation method. What is Al technical title? Al technical title is built by PatSnap Al team. It summarizes the technical point description of ...

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(PDF) Control of flooding phenomena in vacuum distillation …

Also, with regular and accurate control of the coking value index as a very important laboratory parameter, the volume of coke sediments in the coal tar feed entering the distillation column was ...

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Vacuum Distillation of Crude Coal Tar(SPECIFICALLY …

For vacuum distillation of crude coal tar, (specifically creosote oil), the crude coal tar is produced from coke ovens of steel plant, 50% of this crude coal tar in pitch. Coal tar is essentially the thick & black viscous liquid which is obtained by the carbonization of coal, and is a by product in the ordinary manufacture of coal gas. ...

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Effect of Process Parameter on Coal Tar Distillate Products

As already mentioned that coal tar is a complex mixture of hydrocarbons with wide range of molecular weights, so to convert coal tar into coal tar pitch, lower molecular weight hydrocarbons need to be removed from the coal tar. Here, a vacuum distillation assembly was used for converting coal tar into coal tar pitch. For synthesis of coal

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Co-production of Naphthenic Oil and Phenolic

The conversion of medium- and low-temperature coal tar into high-performance fuel and value-added chemicals is one of the main approaches to addressing the current global energy challenges. ... Separation characteristics of low-temperature coal tar containing solid particles by vacuum distillation: Effects of distillation pressure …

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Evaluation of the possibility of separating commercial …

technological parameters of the distillation columns, the estimated extraction costs will amount to 5.64 Gcal per ton of commercial phenol. 1 Introduction Coal tar is a by-product of metallurgical coke or oil coke production. There are many works devoted to an increased yield and improved quality of needle coke [1-5]. Coal tar has a

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Combustion Characteristics and Combustion Kinetics of Dry Distillation …

The samples of dry distillation pine tar and coal tar were investigated by TG-DTG-DSC, and the combustion characteristics and combustion kinetics of the samples were studied. The results show that there exist two significant mass loss peak and endothermic peak in the combustion of dry distillation coal tar and pine tar, which, …

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Production of Commercial Naphthalene by Coal-Tar …

The naphthalene content in the commercial product derived from coal tar in this system is 99.99 wt %., while the yield of naphthalene is at least 90.5 wt %. (3) In the basic three-column system, the total heat consumption is 0.92 Gcal/t of commercial naphthalene (of purity 99.99 wt %). (4) If heat is recycled in the three-column system, the ...

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Vacuum distillation and GC-MS analysis of coal tar in low …

Vacuum distillation and GC-MS analysis of coal tar in low temperature from Northern Shaanxi. March 2014. DOI: 10.3969/j.issn.1005-9954.2014.03.012. Authors: P. …

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COAL TAR PITCH-PAST, PRESENT, AND FUTURE

During distillation of coal tar almost 100 % of the QI in the tar is incorporated into the coal tar pitch product. Over the years the importance or lack of importance of Ql on the quality of coal tar pitch for use as a binder has been reported in the literature. No clear conclusion regarding the importance of Ql in determining the

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(PDF) Characteristics & Production of Coal Tar

As a potential fuel source for its component, utilization of coal tar by catalytic cracking into fuel source and its separation using fractional vacuum distillation …