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acetylene |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.06 sec. |
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acetylene (əsĕt`əlēn') or ethyne (ĕth`īn), HC≡CH, a colorless gas. It melts at −80.8°C; and boils at −84.0°C;. Offensive odors often noted in commercial acetylene are due to impurities. Acetylene forms explosive mixtures with oxygen or air. It is soluble in acetone, ethanol, and water. When dissolved in acetone it is nonexplosive and so is stored dissolved in acetone under pressure in steel cylinders for commercial use. Since it is explosive in the liquid state, it is not generally stored in this form. Acetylene is easily prepared commercially by the reaction of calcium carbide carbide, any one of a group of compounds that contain carbon and one other element that is either a metal, boron, or silicon. Generally, a carbide is prepared by heating a metal, metal oxide, or metal hydride with carbon or a carbon compound. ..... Click the link for more information. with water, but is prepared commercially by the pyrolysis of hydrocarbons. It is used for cutting and welding metals (see oxyacetylene torch oxyacetylene torch (ŏk'sēəsĕt`əlēn) ..... Click the link for more information. ) and is sometimes used as an illuminant gas. When subjected to high temperatures, it undergoes polymerization; benzene may also be formed. It is used in the production of many organic compounds, e.g., neoprene rubber, plastics, and resins. Acetylene is the simplest alkyne alkyne (ăl`kīn), any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon triple bonds (see ..... Click the link for more information. . acetyleneor ethyneSimplest alkyne, C2H2. A colourless, flammable, explosive gas, it is used as a fuel in welding and cutting metals and as a raw material for many organic compounds and plastics. It is produced by reaction of water with calcium carbide, passage of a hydrocarbon through an electric arc, or partial combustion of methane. Decomposing it liberates heat; depending on degree of purity, it is also an explosive. An acetylene torch reaches about 6,000 °F (3,300 °C), hotter than combustion of any other known gas mixture. See also hydrocarbon. |
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| To the extent that both components originate
from the same source, acetylenic free radicals that generate
polyaromatic structures in the flaming stage of combustion, one would
expect similar [. Called linear acetylenic carbon, the new allotrope, or form, of the
otherwise sooty element shows up as amber-colored,
"gossamerlike" threads, whose texture resembles "angel
hair," according to Richard J. The specific end-use segments discussed are Amino Resins,
Phenolic Resins, Acetylenic Chemicals, Polyacetal Resins, Methylene
Diisocyanate, and Pentaerythritol. |
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