The nature of the coal tar
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Users questions:Coal tar processing technology
Experts answer: also known as coal tar paste, coal carbonization process to get a black viscous liquid, has a special smell, flammable and corrosive. High-temperature pyrolysis (ie, coking) were called high-temperature coal tar tar, low-temperature pyrolysis tar get called low-temperature coal tar. Both the composition and nature ofQualitative difference, processing and utilization methods vary. Relative density greater than a high-temperature coal tar, containing 54% ~ 56% of the asphalt, the other components are aromatic and heterocyclic compounds, have been identified more than 400 kinds of compounds. Industry to be the first of several fractions according to boiling point range, and then further use of the fraction crystallization, Acid, alkali extraction or fractionation to be benzene, toluene, xylene, naphthalene, anthracene, phenol, cresol, dimethyl phenol, pyridine, picoline, quinoline and other products. The relative density of low-temperature coal tar is typically less than 1, the main ingredient for a variety of hydrocarbons (50%), in which alkanes and alicyclic hydrocarbon content in a larger, Aromatics content of less, but also contains phenols, pyridine, pyrrole, thiophene and other heterocyclic compounds. Low-temperature coal tar is a major source of synthetic oil, obtained by high pressure hydrogenation of gasoline, diesel and other products.
Experts answer: also known as coal tar paste, coal carbonization process to get a black viscous liquid, has a special smell, flammable and corrosive. High-temperature pyrolysis (ie, coking) were called high-temperature coal tar tar, low-temperature pyrolysis tar get called low-temperature coal tar. Both the composition and nature ofQualitative difference, processing and utilization methods vary. Relative density greater than a high-temperature coal tar, containing 54% ~ 56% of the asphalt, the other components are aromatic and heterocyclic compounds, have been identified more than 400 kinds of compounds. Industry to be the first of several fractions according to boiling point range, and then further use of the fraction crystallization, Acid, alkali extraction or fractionation to be benzene, toluene, xylene, naphthalene, anthracene, phenol, cresol, dimethyl phenol, pyridine, picoline, quinoline and other products. The relative density of low-temperature coal tar is typically less than 1, the main ingredient for a variety of hydrocarbons (50%), in which alkanes and alicyclic hydrocarbon content in a larger, Aromatics content of less, but also contains phenols, pyridine, pyrrole, thiophene and other heterocyclic compounds. Low-temperature coal tar is a major source of synthetic oil, obtained by high pressure hydrogenation of gasoline, diesel and other products.
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