coal-tar dyes

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• coal tar — also coal tar N UNCOUNT Coal tar is a thick black liquid made from coal which is used for making drugs and chemical products. ...coal tar dyes …   English dictionary

• Coal tar — is a brown or black liquid of extremely high viscosity, which smells of naphthalene and aromatic hydrocarbons. Coal tar is among the by products when coal is carbonized to make coke or gasified to make coal gas. Coal tars are complex and variable …   Wikipedia

• coal tar — coal tar, adj. a thick, black, viscid liquid formed during the distillation of coal, that upon further distillation yields compounds, as benzene, anthracene, and phenol, from which are derived a large number of dyes, drugs, and other synthetic… …   Universalium

• Coal tar — A thick, black, tarry liquid, obtained by the distillation of bituminous coal in the manufacture of illuminating gas; used for making printer s ink, black varnish, etc. It is a complex mixture from which many substances have been obtained,… …   The Collaborative International Dictionary of English

• coal tar — coal′ tar n. chem. a viscid black liquid obtained by distillation of coal, used in making dyes, drugs, and other synthetic compounds • Etymology: 1775–85 coal′ tar , adj …   From formal English to slang

• coal tar — n. a black, thick, opaque liquid obtained by the destructive distillation of bituminous coal, used in making dyes, medicines, plastics, paints, etc …   English World dictionary

• coal tar — noun a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds • Hypernyms: ↑pitch, ↑tar • Substance Meronyms: ↑naphthalene * * * noun : tar obtained by the destructive distillation of …   Useful english dictionary

• coal tar — /ˈkoʊl ta/ (say kohl tah) noun a thick, black, viscid liquid formed during the distillation of coal in the manufacture of coal gas and which upon further distillation yields benzene, anthracene, phenol, etc. (from which are derived a large number …  

• coal tar — noun Date: 1785 tar obtained by distillation of bituminous coal and used especially as an industrial fuel, in making dyes, and in the topical treatment of skin disorders …   New Collegiate Dictionary

• coal tar — thick black liquid formed during the distillation of coal and used in making drugs and dyes …   English contemporary dictionary

• Coal gasification — is the process of producing coal gas, a type of syngas–a mixture of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2) and water vapour (H2O)–from coal. Coal gas, which is a combustible gas, was traditionally used as a source of energy for …   Wikipedia