Destructive Distillation means driving off (and collecting) gas from some matter by heating it in the absence of air, where pyrolysis occurs during heating. This is the process called 'coking' when referring to the transformation of bituminous coal into coke (at 1,000 C). Simple sketch of pyrolysis chemistry Pyrolysis usually means the chemical decomposition of organic materials by heating in the absence of oxygen or any other reagents, except possibly steam. ... This page is a candidate to be moved to Wiktionary. ... Asphalt is a highly viscous liquid that occurs naturally in most crude petroleums. ... Coal (previously referred to as pitcoal or seacoal) is a fossil fuel extracted from the ground by underground mining or open-pit mining (surface mining). ...

Examples of substances that are commonly destructive distilled to extract chemicals and other materials include: Distillation is a means of separating liquids through differences in their boiling points. ...

• Wood
• Soft coal

Examples of substances extracted include:

• Acetic acid
• Methyl or wood alcohol
• Coal gas
• Tar

Other types of distillation include: Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour taste and pungent smell. ... In chemistry, an alcohol is any organic compound in which a hydroxyl group (-OH) is bound to a carbon atom of an alkyl or substituted alkyl group. ... Syngas (from synthesis gas) is the name given to gasses of varying composition that are generated in coal gasification and some types of waste-to-energy facilities. ... Tar is a viscous black liquid derived from the destructive distillation of organic matter. ...

• Fractional distillation
• Continuous distillation
• Azeotropic distillation
• Extractive distillation
• Vacuum distillation

Related Information Fractional distillation is the separation of a mixture of miscible compounds by their boiling point, by heating to high enough temperatures. ... Continuous distillation is a distillation process, which does not require interruption for adding raw material. ... In chemistry, azeotropic distillation is any of a range of techniques used to break an azeotrope in distillation. ... Extractive Distillation is defined as distillation in the presence of a miscible, high boiling, relatively non-volatile component, the solvent, that forms no azeotrope with the other components in the mixture. ... This article or section does not cite its references or sources. ...

Coal tar pitch volatiles (CTPV) are the result of destructive distillation of bituminous coal. They contain polynuclear aromatic hydrocarbons (PNA's). PNAs sublime readily and cause carcinogenic compounds in working areas. Evidence suggests that workers exposed to products of combustion or distillation of bituminous coal are at increased risk of cancer. An aromatic hydrocarbon (abbreviated as AH), or arene is a hydrocarbon, the molecular structure of which incorporates one or more planar sets of six carbon atoms that are connected by delocalised electrons numbering the same as if they consisted of alternating single and double covalent bonds. ... In pathology, a carcinogen is any substance or agent that promotes cancer. ... A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... Combustion or burning is a chemical process, an exothermic reaction between a substance (the fuel) and a gas (the oxidizer), usually O2, to release heat. ... it is carsenogetic and is found is pens in pauls pencil case, toilet paper and tissues When normal cells are damaged beyond repair, they are eliminated by apoptosis. ...

See also

• Pyrolysis