Coal tar - Wikipedia
Coal tar is produced through thermal destruction of coal. Its composition varies with the process and type of coal used – lignite, bituminous or anthracite. [13] Coal tar is a mixture of approximately 10,000 chemicals, of which only about 50% have been identified.
Coal Tar and its Distillation Processes - IspatGuru
2018年12月26日 · Distillation of coal tar is carried out mainly to produce benzols, naphtha, creosotes, naphthalene, anthracene, carbolic and cresylic acids, pyridine and pitch. The purpose of tar distillation is to (i) dehydrate the tar in the dehydration column, (ii) remove the pitch from dehydrated tar in pitch column and (iii) separate tar oils in ...
Systematic mapping of studies on coal tar and pitch over the last …
2023年8月1日 · Coal tar pitch (CTP) is a bottom product of HTCT distillation, black solid at room temperature and produced in yields that are greater than half of the processed coal tar (Zander, 1995).
Coal Tar and its Products - IspatGuru
2019年2月9日 · Coal tar represents a mixture of condensable volatile products formed during the destructive distillation of bituminous coal. Composition is variable, but generally consists of 0 % to 2 % of light oils (chiefly benzene, toluene, and xylene), 16 % to 18 % of middle oils (chiefly phenols, cresols, and naphthalene), 8 % to 10 % heavy oils ...
Destructive distillation - Wikipedia
Destructive distillation of a tonne of coal can produce 700 kg of coke, 100 liters of liquor ammonia, 50 liters of coal tar and 400 m 3 of coal gas. Destructive distillation is an increasingly promising method for recycling monomers derived from waste polymers.
Coal Tar - an overview | ScienceDirect Topics
Coal-tar pitches are mainly produced by the distillation of coal tar. The quality of the pitches obtained is therefore governed by the quality of the tars used in the production process. Coal tar is a by-product of coke batteries and thus a highly inconsistent product.
aCoal tar is a mixed compound composed primarily of polycyclic aromatic hydrocarbons including phenanthrene, acenaphthene, fluorene, anthracene, and pyridine. CAS = Chemical Abstracts Service; TSCA = Toxic Substances Control Act. 4.2 PHYSICAL AND CHEMICAL PROPERTIES.
OCCUPATIONAL EXPOSURES DURING COAL-TAR DISTILLATION
Coal tar is obtained by cooling the gas that is formed during the destructive distillation of coal to approximately ambient temperature. It is a black, viscous liquid composed primarily of a complex mixture of condensed-ring aromatic hydrocarbons.
(PDF) Characteristics & Production of Coal Tar - ResearchGate
2020年11月24日 · 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 is conducted. Pyrolysis of...
Coal Tar - an overview | ScienceDirect Topics
Coal tar creosotes and coal tar distillates, oily liquids generally light in color and of lower viscosity than coal tar, are fractions produced by additional distillation of crude coal tar. Coal tar pitch is a highly viscous dark semisolid byproduct of coal pyrolysis.