The Follansbee Tar Plant is involved in coal tar/petroleum (tar and decant oil) refining and naphthalene production. The facility produces pavement sealer bases, refined tars, distillates (coal tar and petroleum), coal tar solvent, various grades of coal tar/petroleum pitch, and refined chemical oil (RCO).
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 ...
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
Naphthalene, acenaphthene and luorene are wellknown organic chemicals that are useful as intermediates in the production of organic acids, dyes and insecticides. Previously acenaphthene and iluorene have been recovered from coal tar distillates or prepared by synthetic methods.
naphthalene oil. NPCs. normalphase columns. OBSG. octyl bonded silica gel. OCAs. ... while the latter is a byproduct from coal coking process [1]. The output of coal tar accounts for 35% of coals in the furnace [2]. ... Li YC, Xin WL, Huang MG, et al. Industrial production technology of coal series needle coke. CN A, ...
To trace the behavior of naphthalene in the pyrolysis of coal tar, the pyrolysis of coal tar containing 14Clabeled naphthalene was carried out at 800−950 °C for 40−50 s. It was found that naphthalene has significant pyrolysis reactivity. The distributions of the radioactivities in compounds with 3−5 rings were,, and % at 800, 900, and 950 °C for 50 s, respectively ...
Introduction. The carbonization of coal to produce metallurgical coke in slottype recovery ovens is the main source of coal tar production, with this coal conversion process constituting the second largest application of coal. Coal tar production is not a primary process target: the main target in the process is the production of metallurgical ...
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 ...
Coal tar ( ) and coal tar pitch ( ) are the byproducts of the hightemperature treatment of coal to make coke or natural gas. These chemical products usually are thick, black or dark brown liquids or semisolids with a naphthalenelike odor. Coal tar also has a sharp, burning taste.
% of the naphthalene in the coal tar; % of the naphthalene fraction is lost with the press runoff. 3. The market is limited because of the minimum product range: only liquid naphthalene can be shipped to the customer. (In April 2012, Rostekhnadzor banned the shipment of pressed naphthalene in railroad cars for lack of mechanization.
The coal tar evaluation process of its constituent components is carried out by distillation, with a high level of naphthalene purity achieved up to 96%. The coal tar distillation process normally ...
The invention discloses a method for extracting industrial naphthalene from coal tar, and belongs to the field of coal chemical industry. According to the method, coal tar is taken as a raw material; naphthalene is fractionated through a weightremoving column; firstly crude naphthalene is obtained; and then industrial naphthalene is prepared through a crude naphthalene rectifying column.
Naphthalene is obtained from either coal tar or petroleum distillation and is primarily used to manufacture phthalic anhydride. Let us see how naphthalene is obtained from coal tar. Step 1: coal tar is the raw material used. Step 2: Naphthalene is fractionated through a weight removing column. Step 3: crude naphthalene is obtained and then ...
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 ...
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
A ≥ 200 °C fraction (CT200F) of lowtemperature coal tar was prepared by a rotary film evaporator. The catalytic conversion experiments of CT200F and six model compounds were conducted on the ...
Coal tar is a byproduct of metallurgical coke or oil coke production. There are many works devoted to an increased yield and improved quality of needle coke [15]. Coal tar has a complex composition with a high level of valuable aromatic compounds, like phenol, naphthalene, anthracene, etc. [6].Due to its content, coal tar can be used as a rich
Abstract In this study, the steam reforming of naphthalene and pyrene as heavy tar model compounds was investigated experimentally in a horizontal tube reactor and theoretically using the CHEMKIN simulation. The experimental results revealed that the reactivity of naphthalene was higher than that of pyrene in the presence of steam. The carbon content converted to soot is a little more than ...
Naphthalene was first isolated from coal tar in 1819 by Alexander Garden; it represents about 10% of this complex mixture of aromatics. The industrial importance of naphthalene dates from the latter half of the last century, owing mainly to the ease with which it can be converted into sulfonic acids and thence also to the naphthols, for use as dyestuffs intermediates.
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.
Coal tar is a thick dark liquid which is a byproduct of the production of coke and coal gas from coal. It is a type of has both medical and industrial uses. Medicinally it is a topical medication applied to skin to treat psoriasis and seborrheic dermatitis (dandruff). It may be used in combination with ultraviolet light therapy. Industrially it is a railroad tie preservative and ...
It processes the naphthalene fraction from the rectification of coal tar so as to produce naphthalene of grade A and type II according to Technical Specifications TU 14797. Until November 2020, the naphthalene was produced at MMK by solidification of the naphthalene fraction and subsequent mechanical separation of the naphthalene crystals ...
Naphthalene is the simplest polycyclic aromatic hydrocarbon, and can be used as a precursor to many other complex aromatics. Current industrial processes remove it from coal tar or petroleum during the refining and distillation steps. The process reported here is much greener, albeit on a much smaller scale.
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