coal tar distillation wiki

Fractional Distillation In The Coal Tar Industry

Coal tar is essentially the thick viscous liquid which is obtained by the carbonisation of coal, and is a by-product in the ordinary manufacture of coal gas. It should be differentiated from all the other forms of tar. When coal is submitted to dry distillation in horizontal or vertical retorts, the products of carbonisation are gas, ammoniacal ...

coal tar - Wiktionary

Nov 26, 2018· A black, viscous tar made by the destructive distillation of coal (to make coke and town gas); it contains a great number of compounds including hydrocarbons and phenols; used in the preparation of medicated soap and shampoo, and industrially for the manufacture of very many products. 1989, Alain Chauvel, Gilles Lefebvre, Petrochemical Processes: Major ...

Tar and similar topics | Frankensaurus.com

Shale oil obtained from the destructive distillation of cannel coal, mineral wax, or bituminous shale, once used widely for illumination. Chemically similar to the more refined, petroleum-derived kerosene, it consists mainly of several hydrocarbons of the alkane series, with 10 to 16 carbon atoms in each molecule, with a boiling point of 175°C to 325°C, higher than gasoline or the petroleum ...

Coal tar - Wikipedia

As a coal tar distillation is referred to the separation of the coal tar into useful ingredients in a Steinkohlenteerraffinerie.It developed partly before and partly parallel to petroleum distillation.. Procedure. The separation takes place by fractional distillation (partly also by vacuum distillation).This creates different fractions, with subsequent rectification, crystallization and ...

US20020185411A1 - Coal tar and hydrocarbon mixture pitch ...

Described are methods that utilize high efficiency evaporative distillation to make a high softening point coal tar pitch, a quinoline insoluble-free and ash-free coal tar pitch having a desired softening point, and a mesophase coal tar pitch. Each of the methods uses a feed coal tar pitch having a softening point in the range of 70° C. to 160° C.

Tar - Simple English Wikipedia, the free encyclopedia

Tar is a sticky black liquid made of thick oil.It is a natural substance, oozing out of the ground in places like the La Brea tar pits.Usually it is made by heating coal inside a chemical apparatus.. Most tar is produced from coal as a byproduct of coke production, but it can also be produced from petroleum, peat or wood.The "destructive distillation" of a ton of coal can produce 700 kg of ...

Coal tars and their distillates- information sheet - Canada.ca

Coal tars are substances derived from the heating of coal in the absence of oxygen, a process that occurs at integrated steel mills. Coal tar distillates are derived from the distillation of coal tars at coal tar refinery facilities. All coal tar compounds are considered to be substances of Unknown or Variable composition, Complex reaction ...

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,…

Tar - WikiMili, The Best Wikipedia Reader

A tar-like substance can be produced from corn stalks by heating them in a microwave. 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]

1911 Encyclopædia Britannica/Distillation - Wikisource ...

Dry Distillation.—In this process the substance operated upon is invariably a solid, the vapours being condensed and collected as in the other methods. When the substance operated upon is of uncertain composition, as, for example, coal, wood, coal-tar, &c., the term destructive distillation is employed.

US2748063A - Distillation of coal tar - Google Patents

US2748063A US315898A US31589852A US2748063A US 2748063 A US2748063 A US 2748063A US 315898 A US315898 A US 315898A US 31589852 A US31589852 A US 31589852A US 2748063 A US2748063 A US 2748063A Authority US United States Prior art keywords tar stage naphthalene solvent vapors Prior art date 1952-10-21 Legal status (The legal status is an assumption and is not a …

mechanism of distillation of coal tar

Coal Tar and its Distillation Processes – IspatGuru. 26/12/2018· 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 ...

Coal tar — Wikipedia Republished // WIKI 2

Jul 25, 2019· Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. It has both medical and industrial uses. It may be applied to the affected area to treat psoriasis and seborrheic dermatitis (dandruff). It may be used in combination with ultraviolet light therapy. Industrially it is a railway tie preservative and used in the surfacing of roads.

What does coal tar mean? - definitions

Information and translations of coal tar in the most comprehensive dictionary definitions resource on the web. Login . The STANDS4 Network ... a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds.

Coal tar | Article about coal tar by The Free Dictionary

coal tar, product of the destructive distillation of bituminous coal. Coal tar can be distilled into many fractions to yield a number of useful organic products, including benzene, toluene, xylene, naphthalene, anthracene, and phenanthrene.

Coal distillation - YouTube

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Phototoxic tar dermatitis - WikiMili, The Best Wikipedia ...

Coke, coal gas, gas carbon, coal tar, ammonia liquor, and coal oil are examples of commercial products historically produced by the destructive distillation of coal. Tar is a dark brown or black viscous liquid of hydrocarbons and free carbon, obtained from a wide variety of carbon based matter through destructive distillation.

Carbon | Rain Industries Limited

Coal tar pitch, distilled from coal tar, is used as a binder for aluminum industry carbon anodes, graphite electrodes, specialty graphite and refractory materials. RAIN, through its wholly-owned subsidiaries, operates four coal tar distillation facilities in Belgium, Canada and Germany.

Coal tar | definition of coal tar by Medical dictionary

coal tar: [ tahr ] a dark brown or black viscid liquid from the wood of various species of pine, or found as a by-product of the destructive distillation of bituminous coal (see coal tar ). It is a complex mixture, the source of organic substances such as cresol, creosol, naphthalene, paraffin, phenol, and toluene . Formerly used as an ...

Goudron de houille — Wikipédia

Les goudrons de houille (coal tar), appelé aussi simplement goudron, sont des dérivés houillés de couleur marron à noire, très visqueux, voire solides (brai de goudron). Ce sont des sous-produits de la distillation de la houille lors de la fabrication du coke, ou de sa gazéfaction en gaz de houille.Dans le langage courant, on les confond souvent avec le bitume d'origine pétrolière.

What is the molucular formula of coal tar? - Quora

According to Wikipedia: Coal tar contains many polycyclic aromatic hydrocarbons, such as benzopyrenes, benzanthracene, benzofluoranthenes, and chrysene, which are known carcinogens. Coal tar is produced through thermal destruction (pyrolysis) of c...

Coal tar - definition of coal tar by The Free Dictionary

Define coal tar. coal tar synonyms, coal tar pronunciation, coal tar translation, English dictionary definition of coal tar. n. ... coal tar - a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds. tar, pitch - any of various dark heavy viscid substances obtained as a residue.

Coal Tar - Bhilai Cement

Coal Tar is a thick, black, viscid liquid formed during the destructive distillation of coal. Coal Tar is a by-product generated while processing coking coal into low ash metallurgical coke in a recovery-type coke oven plant, which accounts for around 3.5-4% of coke produced.

Destructive distillation - WikiMili, The Best Wikipedia Reader

Destructive distillation of wood produces hundreds of compounds including tar, terpenes, turpentine and methanol together with a solid residue of charcoal. [7] [8] 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.

naphtha - zxc.wiki

Naphtha or raw gasoline is the name of a relatively light petroleum fraction that is obtained in a refinery from crude oil by fractional distillation.Depending on the type of crude oil, both the mean boiling point and the exact composition of the naphtha vary.. In addition to naphtha obtained from crude oil, light distillates from coal tar and synthetic crude oil from oil shale are also called ...

Coal-tar | Article about Coal-tar by The Free Dictionary

coal tar, product of the destructive distillation of bituminous coal. Coal tar can be distilled into many fractions to yield a number of useful organic products, including benzene, toluene, xylene, naphthalene, anthracene, and phenanthrene.

Coal tar distillate 65996-92-1 wiki

UN1136 Coal tar distillates, flammable, Hazard Class: 3; Labels: 3-Flammable liquid 3.6 Usage This substance is a mixture of many individual substances and cannot be adequately represented by a single molecuIar structure.Coal tar is a by-product in the distillation of coal. May cause postinflammatory hyperpigmentation.

Continuous distillation - encyclopedia article - Citizendium

May 29, 2010· Continuous distillation is an ongoing separation process in which a liquid mixture of two or more miscible components is continuously fed into the process and physically separated into two or more products by preferentially boiling the more volatile (i.e., lower boiling point) components out of the mixture.. Large-scale, continuous distillation is very commonly used in the chemical process ...