process of naphthalene production from coal tar

Biodegradation of Naphthalene from Coal Tar and Heptamethylnonane in ...

Biodegradation of Naphthalene from Coal Tar and Heptamethylnonane in ...

This research presents the first demonstration of substantial microbial degradation and depletion of naphthalene from coal tar, a multicomponent, aromatic, dense nonaqueous phase liquid (NAPL). The rates and extents of microbial degradation of naphthalene from coal tar and from a twocomponent NAPL simpler in composition than coal tar were evaluated in gently mixed, NAPL−water batch systems ...

Process Intensification for Syngas Hydrogen |

Process Intensification for Syngas Hydrogen |

The Process Intensification for Syngas Hydrogen key technology area addresses control of chemical reactions in increasingly modular and intrinsically efficient reactors, allowing for streamlined processes with wellcoordinated unit operations, and with a focus on gasification of biomass and carbonaceous wastes into syngas, s.

Process for the production of naphthalene Google Patents

Process for the production of naphthalene Google Patents

A kind of method for preparing naphthalene at first is a Doak Tar Oil, and the boiling range of further purifying is 205~235 ℃ a coal tar distillate that obtains like this is commonly referred to naphtalene contain the such heterocycle component of naphthalene, methylnaphthalene, phenolic compound and benzothiophene, (G, people such as Gilbert, Ind, Eng, Chem, 53 ...

Naphthalene an overview | ScienceDirect Topics

Naphthalene an overview | ScienceDirect Topics

Naphthalene is the most simple, commonly found, and most watersoluble PAHs in the environment. It is produced from coal tar fraction by crystallization and distillation. It is often used as dispersants in natural and synthetic rubbers, in the production of naphthalene sulfonate superplasticizers for concrete, in paints, tanning agents in the leather industry, in the production of the ...

Utilisation of coal tar naphthalene oil fractions for the synthesis of ...

Utilisation of coal tar naphthalene oil fractions for the synthesis of ...

Coal tar naphthalene oil fraction (CTNOF) is typically obtained as a byproduct of the coking process in steel production. When coal is subjected to high temperatures in the absence of air (coking), it undergoes thermal decomposition, yielding various byproducts including coal tar [].This tar can be further processed to extract different fractions, one of which is naphthalene oil [2, 3].

Mechanism for the catalytic thermal polycondensation of naphthalene at ...

Mechanism for the catalytic thermal polycondensation of naphthalene at ...

Naphthalene is an important component of high temperature coal tar and its content can reach more than 10%. Catalytic polycondensation of naphthalene is an effective way to prepare mesophase pitch and functional carbon materials. ... which may provide valuable hints for exploring the production process of mesophase naphthalene pitch. Declare of ...

Critical assessment of thermodynamic properties of ... ScienceDirect

Critical assessment of thermodynamic properties of ... ScienceDirect

At the moment, most of the aluminum smelters utilize coal tar pitch as binder in their prebaked carbon anode (and graphitized carbon cathode) production processes. Hence, the prediction of the thermodynamic properties of PAHs present in coal tar pitch aimed at phase behavior description of coal tar pitch during heat treatment will be the main ...

PDF 5. Production, Import/Export, Use, and Disposal

PDF 5. Production, Import/Export, Use, and Disposal

PRODUCTION Naphthalene may be produced from either coal tar or petroleum. Distillation and fractionation of coal tar is the most common production process. The middle fraction (containing most of the naphthalene) is cooled, crystallizing the naphthalene. The crude naphthalene may be refined by distillation, washing, and

PDF 9 Naphthalene production and uses Springer

PDF 9 Naphthalene production and uses Springer

Naphthalene production and uses 299 Naphthalene recovery Coal tar is the traditional feedstock for the recovery of naphthalene. The introduc­ tion of new cracking processes in the last decades has given rise to the availability of petroleumbased raw materials. In addition to coalderived naphthalene, petro­

coaltar product Students | Britannica Kids | Homework Help

coaltar product Students | Britannica Kids | Homework Help

Coal tar, a black, sticky liquid thicker than water, is produced when coal is heated in the absence of air, a process called destructive distillation. Much coal tar is produced by the steel industry as it produces millions of tons of coke each year to fuel the furnaces used in separating iron from its ores.

Coal Tar Cargo Handbook the world's largest cargo transport ...

Coal Tar Cargo Handbook the world's largest cargo transport ...

It is a thin, colourless, highly flammable liquid with a characteristic smell. It is a good motor fuel solvent as well as being a feedstock for other benzene derivatives used in dye, insecticides and plastics production. At a later stage in the distillation process, a heavy coal tar solvent naphtha and a naphthalene fraction are produced.

Products of Coal: Coke, Coal Tar and Coal Gas GeeksforGeeks

Products of Coal: Coke, Coal Tar and Coal Gas GeeksforGeeks

But nowadays Bitumen has replaced coal tar to serve this purpose. Naphthalene balls used as moth repellent in the storage areas are the derivatives of coal tar. ... The production process is distinct, both physically and chemically, from that used to create a range of gaseous fuels known variously as manufactured gas, syngas, hygas, Dowson gas ...

Systematic mapping of studies on coal tar and pitch over the last five ...

Systematic mapping of studies on coal tar and pitch over the last five ...

High temperature coal tar (HTCT) is a coproduct of the coking process, whose objective is the production of metallurgical coke for use in the production of pig iron in blast furnaces. According to FernándezGarcía et al. (2017), HTCT is obtained with a yield of about 35 wt% in coking.

(PDF) An Overview of Coal Hydrogenation ResearchGate

(PDF) An Overview of Coal Hydrogenation ResearchGate

100 samples of recycle solvent were obtained by continuous operation (50 days) of 1 ton/day coal liquefaction plant at Kimitu. Naphthalene derivatives in the recycle solvents were anslyzed in ...

The use of solvents for purifying industrial naphthalene from coal tar ...

The use of solvents for purifying industrial naphthalene from coal tar ...

The naphthalene samples studied in this work were produced by the chemical industry. Fig. 1 shows a process for the production of naphthalene with different degrees of purity. The refined naphthalene came from the catalytic hydrogenation process, (NAFR) (% purity); the industrial naphthalene from a series of distillations (NAFD) (% purity) and the crystallised naphthalene (NAFC) (99 ...

PDF COAL TAR and COAL TAR CHEMICALS SP Global

PDF COAL TAR and COAL TAR CHEMICALS SP Global

Report No. COAL TAR CHEMICALS JAMES J. L. MA December 1976 A private report by the a PROCESS ECONOMICS PROGRAM STANFORD RESEARCH INSTITUTE MENLO PARK, CALIFORNIA

Top 5 Vendors in the Naphthalene Market from 2019 to 2023 | Technavio ...

Top 5 Vendors in the Naphthalene Market from 2019 to 2023 | Technavio ...

The company derives naphthalene from coal tar at production plants in North America, Europe, Australia, and China. NIPPON STEEL SUMITOMO METAL CORPORATION.

Pure naphthalene isolation by liquid extraction

Pure naphthalene isolation by liquid extraction

In a process for obtaining substantially sulfur free pure naphthalene from bituminous coal tar and thionaphthene as a byproduct, a dephenolized thionaphthenecontaining naphthalene fraction from oxidative purification is extracted with concentrated sulfuric acid and acetic acid anhydride in benzene.

Production of Commercial Naphthalene by CoalTar Processing

Production of Commercial Naphthalene by CoalTar Processing

The naphthalene content in the commercial product derived from coal tar by the proposed method is wt %. The yield of naphthalene is wt %. The energy consumption in the basic threecolumn system is Gcal/t of commercial naphthalene (of purity wt %). If heat is recycled in the threecolumn system, the energy consumption is ...

Naphthalene New World Encyclopedia

Naphthalene New World Encyclopedia

Naphthalene (also known as naphthalin, naphthaline, moth ball, tar camphor, white tar, or albocarbon), is a crystalline, aromatic, white, solid hydrocarbon, best known as the primary ingredient of is volatile, forming a flammable vapor. Each molecule of this substance consists of two fused benzene rings. As its most abundant single component, it is obtained from coal tar ...

Naphthalene Wikipedia

Naphthalene Wikipedia

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 presentday production is mainly from coal tar. Approximately tons are produced annually. Naphthalene is the most abundant single component of coal tar.

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