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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.
The term creosote has a broad range of definitions depending on the origin of the coal tar oil and end-use of the material. With respect to wood preservatives, the United States Environmental Protection Agency (EPA) considers the term creosote to mean a pesticide for use as a wood preservative meeting the American Wood Protection Association (AWPA) Standards P1/P13 and P2. [6]
Coal tar creosote; Wood creosote; Reduction product of vanillin using zinc powder in strong hydrochloric acid (Clemmensen reduction) Found as glycosides in green vanilla beans [2] It is also found in tequila. [3]
Creosote is a tar-based preservative that is commonly used for utility poles and railroad ties or sleepers. Creosote is one of the oldest wood preservatives, and was originally derived from a wood distillate , but now, virtually all creosote is manufactured from the distillation of coal tar .
One can produce a tar-like substance from corn stalks by heating them in a microwave oven. This process is known as pyrolysis. Tar is a dark brown or black viscous liquid of hydrocarbons and free carbon, obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. [1]
In 1834, German chemist Friedlieb Ferdinand Runge discovered a phenol, also known as carbolic acid, which he derived in an impure form from coal tar.In August 1865, Joseph Lister applied a piece of lint dipped in carbolic acid solution to the wound of an eleven-year-old boy at Glasgow Royal Infirmary, who had sustained a compound fracture after a cart wheel had passed over his leg.
The wood-tar creosote is commonly called "Nikkyoku creosote" (i.e. Japanese pharmacopoeial creosote) as a means to distinguish from potentially harmful industrial creosote. These recent naming conventions were prompted by a controversy set off by a consumer alert booklet, Katte wa ikenai [ ja ] ( 買ってはいけない , "Should not buy ...
Coal tar creosote, a wood preservative and waterproofing agent; Diesel fuel; Fuel oil that contains residual oil left over from petroleum distillation;