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Isopentane
Isopentane, also called methylbutane or 2-methylbutane, is a branched-chain saturated hydrocarbon (an alkane) with five carbon atoms, with formula or . Isopentane is a volatile and flammable liquid. It is one of three structural isomers with the molecular formula C5H12, the others being pentane (''n''-pentane) and neopentane (2,2-dimethylpropane). Isopentane is commonly used in conjunction with liquid nitrogen to achieve a liquid bath temperature of −160 °C. Natural gas typically contains 1% or less isopentane, but it is a significant component of natural gasoline.Ivan F. Avery, L. V. Harvey (1958): Natural-gasoline and Cycling Plants in the United States', Information circular, U.S. Department of the Interior, Bureau of Mines. 12 pages. History Although the mixture of pentanes was first isolated from the destructive distillation (pyrolysis) products of the boghead coal by Charles Greville Williams in 1862. In 1864–1865 two chemists tried to extract same hydro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Isomerism
In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature) of a chemical compound, compound is a compound that contains the same number and type of atoms, but with a different connectivity (i.e. arrangement of chemical bond, bonds) between them. The term metamer was formerly used for the same concept. For example, butanol , methyl propyl ether , and diethyl ether have the same molecular formula but are three distinct structural isomers. The concept applies also to polyatomic ions with the same total charge. A classical example is the cyanate ion and the fulminate ion . It is also extended to ionic compounds, so that (for example) ammonium cyanate and urea are considered structural isomers,William F. Bynum, E. Janet Browne, Roy Porter (2014)''Dictionary of the History of Science'' page 218. and so are methylammonium formate and ammonium acetate . Structural isomerism is the most radical type of isomerism. It is opposed to stereoisomerism, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alkane
In organic chemistry, an alkane, or paraffin (a historical trivial name that also has other meanings), is an acyclic saturated hydrocarbon. In other words, an alkane consists of hydrogen and carbon atoms arranged in a tree structure in which all the carbon–carbon bonds are single. Alkanes have the general chemical formula . The alkanes range in complexity from the simplest case of methane (), where ''n'' = 1 (sometimes called the parent molecule), to arbitrarily large and complex molecules, like hexacontane () or 4-methyl-5-(1-methylethyl) octane, an isomer of dodecane (). The International Union of Pure and Applied Chemistry (IUPAC) defines alkanes as "acyclic branched or unbranched hydrocarbons having the general formula , and therefore consisting entirely of hydrogen atoms and saturated carbon atoms". However, some sources use the term to denote ''any'' saturated hydrocarbon, including those that are either monocyclic (i.e. the cycloalkanes) or polycycl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentane
Pentane is an organic compound with the chemical formula, formula C5H12—that is, an alkane with five carbon atoms. The term may refer to any of three structural isomerism, structural isomers, or to a mixture of them: in the IUPAC nomenclature, however, pentane means exclusively the ''n''-pentane isomer, in which case pentanes refers to a mixture of them; the other two are called isopentane (methylbutane) and neopentane (dimethylpropane). Cyclopentane is not an isomer of pentane because it has only 10 hydrogen atoms where pentane has 12. Pentanes are components of some fuels and are employed as specialty solvents in the laboratory. Their properties are very similar to those of butanes and hexanes. History Normal pentane was discovered in 1862 by Carl Schorlemmer, who, while analyzing pyrolysis products of the cannel coal mined in Wigan, identified, separated by fractional distillation and studied a series of liquid hydrocarbons inert to Nitric acid, nitric and Sulfuric acid, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Gasoline
Natural gasoline is a liquid hydrocarbon mixture condensed from natural gas, similar to common gasoline (petrol) derived from petroleum. The chemical composition of natural gasoline is mostly five- and six-carbon alkanes (pentanes and hexanes) with smaller amounts of alkanes with longer chains.Sheng Wang, Ying Zhang, Mao-Gang He, Xiong Zheng, and Li-Bin Chen (2014): "Thermal Diffusivity and Speed of Sound of Saturated Pentane from Light Scattering". ''International Journal of Thermophysics'', volume 35, pages 1450–1464. . Quote: "ethane 2.4% w/w, butane 1.3%, pentane 67.1%, hexane 22.0%, heptane 5.7%, and octane 1.5 %". It contains significant amounts of isopentane (methyl butane) , which is rare in the petroleum product.Ivan F. Avery, L. V. Harvey (1958): Natural-gasoline and Cycling Plants in the United States', Information circular, U.S. Department of the Interior, Bureau of Mines. 12 pages. Its boiling point is within the standard range for gasoline, and its vapor pressure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isobutane
Isobutane, also known as ''i''-butane, 2-methylpropane or methylpropane, is a chemical compound with molecular formula HC(CH3)3. It is an isomer of butane. Isobutane is a colorless, odorless gas. It is the simplest alkane with a tertiary carbon atom. Isobutane is used as a precursor molecule in the petrochemical industry, for example in the synthesis of isooctane. Production Isobutane is obtained by isomerization of butane. Uses Isobutane is the principal feedstock in alkylation units of refineries. Using isobutane, gasoline-grade "blendstocks" are generated with high branching for good combustion characteristics. Typical products created with isobutane are 2,4-dimethylpentane and especially 2,2,4-trimethylpentane. Solvent In the Chevron Phillips slurry process for making high-density polyethylene, isobutane is used as a diluent. As the slurried polyethylene is removed, isobutane is "flashed" off, and condensed, and recycled back into the loop reactor for this purpose. Prec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3-Ethylpentane
3-Ethylpentane (C7H16) is a branched saturated hydrocarbon. It is an alkane, and one of the many structural isomers of heptane, consisting of a five carbon chain with a two carbon branch at the middle carbon. An example of an alcohol Alcohol may refer to: Common uses * Alcohol (chemistry), a class of compounds * Ethanol, one of several alcohols, commonly known as alcohol in everyday life ** Alcohol (drug), intoxicant found in alcoholic beverages ** Alcoholic beverage, an alco ... derived from 3-ethylpentane is the tertiary alcohol 3-ethylpentan-3-ol.Ritchie, R and Gent, D: ''OCR Chemistry AS'', page 151. Heinemann, 2007. References Alkanes Ethyl compounds {{Hydrocarbon-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-Ethyl-1-butanol
2-Ethyl-1-butanol (IUPAC name: 2-ethylbutan-1-ol) is an organic chemical compound. It can be used to facilitate the separation of ethanol from water, which forms an azeotrope that otherwise limits the maximum ethanol concentration. Reactions 2-Ethyl-1-butanol is manufactured industrially by the aldol condensation of acetaldehyde and butyraldehyde, followed by hydrogenation. It may also be prepared by the Guerbet reaction. Properties and applications The branching in 2-ethyl-1-butanol makes it harder to crystallize due to packing disruption, which results in a very low freezing point. Esters of 2-ethyl-1-butanol are similarly effected and it therefore finds application as a feedstock in the production of plasticizers and lubricants, where its presence helps reduce viscosity and lower freezing points. See also *2-Ethylhexanol 2-Ethylhexanol (abbreviated 2-EH) is an organic compound with the chemical formula . It is a branched, eight-carbon chiral alcohol. It is a colorless liquid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society Of Chemistry
The Royal Society of Chemistry (RSC) is a learned society and professional association in the United Kingdom with the goal of "advancing the chemistry, chemical sciences". It was formed in 1980 from the amalgamation of the Chemical Society, the Royal Institute of Chemistry, the Faraday Society, and the Society for Analytical Chemistry with a new Royal Charter and the dual role of learned society and professional body. At its inception, the Society had a combined membership of 49,000 in the world. The headquarters of the Society are at Burlington House, Piccadilly, London. It also has offices in Thomas Graham House in Cambridge (named after Thomas Graham (chemist), Thomas Graham, the first president of the Chemical Society) where ''RSC Publishing'' is based. The Society has offices in the United States, on the campuses of The University of Pennsylvania and Drexel University, at the University City Science Center in Philadelphia, Pennsylvania, in both Beijing and Shanghai, People' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Oil Rush
The oil rush in America started in Titusville, Pennsylvania, in the Oil Creek Valley when Edwin L. Drake struck "rock oil" there in 1859. Titusville and other towns on the shores of Oil Creek expanded rapidly as oil wells and refineries shot up across the region. Oil quickly became one of the most valuable commodities in the United States and railroads expanded into Western Pennsylvania to ship petroleum to the rest of the country. By the mid-1870s, the oil industry was well established, and the "rush" to drill wells and control production was over. Pennsylvania oil production peaked in 1891 and was later surpassed by western states such as Texas and California, but some oil industry remains in Pennsylvania. Pre-rush history Pre-Pennsylvania Rock Oil Company Before petroleum was used as a fuel, oil had many uses. In Pennsylvania, the Native American tribes had been using oil from seeps for several centuries. Early European explorers discovered evidence of troughs dug alongs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Schorlemmer
Carl Schorlemmer FRS (30 September 1834 – 27 June 1892) was a German chemist who did research on hydrocarbons and contributed to the study of the history of chemistry. Early life and education Schorlemmer was born in 1834, the son of a joiner in Darmstadt. He was able to visit Realschule and later — against the will of his poor father — trade school. Schorlemmer started his training to become a pharmacist in 1853 in Groß-Umstadt. During his training he made own chemical experiments in the laboratory and was interested in astronomy and botany. After two and a half years he passed his exam, became an assistant pharmacist and worked in the Schwanen pharmacy in Heidelberg. Having attended some lectures of Robert Wilhelm Bunsen, he studied pharmacy and chemistry in Heidelberg and in Gießen (where he attended lectures of Heinrich Will and Hermann Franz Moritz Kopp, a historian of chemistry). He later became demonstrator at Owens College in Manchester with Henry Enfield Ros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyrus Warren
Cyrus () is a Persian-language masculine given name. It is historically best known as the name of several Persian kings, most notably including Cyrus the Great, who founded the Achaemenid Empire in 550 BC. It remains widespread among Zoroastrians, particularly in India, and is also relatively common in the Anglophone world. Etymology Cyrus, as a word in English, is the Latinized form of the Greek Κῦρος, ''Kȳros'', from Old Persian ''Kūruš''. According to the inscriptions, the name is reflected in Elamite ''Kuraš'', Babylonian ''Ku(r)-raš/-ra-áš'' and Imperial Aramaic ''kwrš''. The modern Persian form of the name is '' Kūroš''. The etymology of Cyrus has been and continues to be a topic of discussion amongst historians, linguists, and scholars of Iranology. The Old Persian name "kuruš" has been interpreted in various forms such as "the Sun", "like Sun", "young", "hero," and "humiliator of the enemy in verbal contest" and the Elamite "kuraš" has been trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Ice
Dry ice is the solid form of carbon dioxide. It is commonly used for temporary refrigeration as CO2 does not have a liquid state at normal atmospheric pressure and Sublimation (phase transition), sublimes directly from the solid state to the gas state. It is used primarily as a cooling agent, but is also used in fog machines at theatres for dramatic effects. Its advantages include lower temperature than that of Ice, water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere). It is useful for preserving frozen foods (such as ice cream) where Refrigeration, mechanical cooling is unavailable. Dry ice sublimes at at Earth atmospheric pressure. This extreme cold makes the solid dangerous to handle without protection from frostbite injury. While generally not very toxic, the outgassing from it can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood) due to a buildup in confined locations. Properties Dry ice is the soli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
