scholarly journals Research and Obtaining Compounds of Carbonic Acids From Resins of Uzgen Coals

2021 ◽  
Vol 7 (1) ◽  
pp. 305-310
Author(s):  
G. Osekova ◽  
Y. Tashpolotov
Keyword(s):  
Low Temperature ◽  
Ethyl Acetate ◽  
Carboxylic Acids ◽  
Brown Coal ◽  
Sodium Acetate ◽  
Coal Tar ◽  
Distillation Method ◽  
Carbonic Acids

In the article, sodium acetate was studied and obtained from carboxylic acids from coal tar of brown coal by the method of neutralization and drying and crystallization were made. Investigated and obtained ethyl acetate from carboxylic acids from the resin of Uzgen brown coal, by the esterification method and by the low-temperature distillation method. Excess carboxylic acids and azeotropic substances were checked, repeated purification was done, and pure ethyl acetate was obtained at a temperature of 77–78 °C.

GC-MS Analyzing of Coal Tar of Lignite Briquette from Low Temperature Pyrolysis

2014 ◽  
Vol 472 ◽  
pp. 591-595 ◽  
Author(s):  
Xin Tao Cui ◽  
Yong Fa Zhang ◽  
Dong Liu Dong ◽  
Yu Qiong Zhao
Keyword(s):  
Phenolic Compounds ◽  
Low Temperature ◽  
Brown Coal ◽  
Aromatic Compounds ◽  
Heterocyclic Compounds ◽  
Coal Tar ◽  
Aliphatic Hydrocarbon ◽  
The Other ◽  
Low Temperature Pyrolysis ◽  
Content Of Oxygen

Distillation and GC-MS were employed to analysis the coal tar of low-temperature pyrolysis of lignite briquette by contrasting with standards: the fraction below 340°C in the tar distillates of brown coal tar accounted for 83.30% and the other greater than 340°C is pitch accounted for 16.32%. 34.00% of coal tar are hydrocarbons which are mainly consisted of fat aliphatic hydrocarbon and include few alkene and cycloparaffins. The content of phenolic compounds in coal tar, mainly comes from the fraction below 210°C, is 11.68%. 16.86% of coal tar is aromatic compounds which are mainly composed of substitutive derivative of polyalkylbenzene distributing in all kinds of fractions; and a small amount of aromatic compounds which is concentrated in the fraction below 300°C. The content of oxygen-containing, nitrogen-containing and heterocyclic compounds is 4.47%, 0.57%, 2.11%, respectively.

Lumped kinetic model for the hydrodeoxygenation of full-range middle-low temperature coal tar

2021 ◽  
Vol 134 (1) ◽  
pp. 179-198
Author(s):  
Yijie Wang ◽  
Yonghong Zhu ◽  
Feng Tian ◽  
Huan Dong ◽  
Xiaoyong Fan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Kinetic Model ◽  
Full Range ◽  
Coal Tar

Brown coal tar hydrotreatment

2010 ◽  
Vol 89 (2) ◽  
pp. 265-270 ◽  
Author(s):  
Marcela Šafářová ◽  
Jaroslav Kusý ◽  
Lukáš Anděl
Keyword(s):  
Brown Coal ◽  
Coal Tar

Characterization of Toluene Insolubles from Low-Temperature Coal Tar

2014 ◽  
Vol 2 (6) ◽  
pp. 548-555 ◽  
Author(s):  
Dong Li ◽  
Xin Liu ◽  
Zhihui Sun ◽  
Panpan Tian ◽  
Wenhong Li
Keyword(s):  
Low Temperature ◽  
Coal Tar

Molecular characterization of a middle/low-temperature coal tar by multiple mass spectrometries

Fuel ◽  
2021 ◽  
Vol 306 ◽  
pp. 121435
Author(s):  
Xian-Hou Guo ◽  
Xian-Yong Wei ◽  
Lin Hu ◽  
Xue-Jing Liu ◽  
Mei-Xia Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Molecular Characterization ◽  
Coal Tar

Study on the association driving force of low temperature coal tar asphaltenes

2022 ◽  
pp. 132361
Author(s):  
Chongpeng Du ◽  
Dong Li ◽  
Chao Shi ◽  
Zonggang Du ◽  
Wei Han ◽  
...  
Keyword(s):  
Low Temperature ◽  
Driving Force ◽  
Coal Tar

scholarly journals XRD Characterization of the Structure of Graphites and Carbon Materials Obtained by the Low-Temperature Graphitization of Coal Tar Pitch

2015 ◽  
Vol 17 (2) ◽  
pp. 87 ◽  
Author(s):  
Ch.N. Barnakov ◽  
G.P. Khokhlova ◽  
A.N. Popova ◽  
S.A. Sozinov ◽  
Z.R. Ismagilov
Keyword(s):  
Low Temperature ◽  
Carbon Materials ◽  
Coal Tar ◽  
Structural Phase ◽  
Coherent Scattering ◽  
Amorphous Structure ◽  
Coal Tar Pitch ◽  
X Ray Diffraction ◽  
Needle Coke ◽  
The Individual

The structure of some commercial graphites and carbon materials (CMs) obtained by the low-temperature catalytic graphitization of coal tar pitch with iron salt, needle coke, foamed graphite as the catalysts has been studied. The study was performed using the X-ray diffraction technique with reflections from base plane and their decomposition into two components corresponding to the structural phases of graphite which have different XRD characteristics. Various CMs were compared with respect to the structural phase ratio, distance between polyarene layers in these phases, and sizes of the coherent scattering regions. The (004) reflection provided a better fit of some properties of graphites to the calculated XRD characteristics as compared to calculation from the (002) reflection. In the case of carbonization of coal tar pitch with investigated catalyst additions, prepared carbon materials have a higher degree of graphitization and a crystallite size greater than in the other case of carbonization of the individual pitch. The highest catalytic activity is shown by foamed graphite. It was found that the use of foamed graphite as the catalyst at 800-900 ºC produced carbon materials possessing a crystalline structure with interplanar spacing close to that in commercial graphites, while in the absence of catalyst the coal tar pitch material has an amorphous structure.

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