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Perfluoropropanoic Acid
Perfluoropropionic acid (PFPrA) or pentafluoropropionic acid is the perfluoroalkyl carboxylic acid with the formula CF3CF2CO2H. It is a colorless liquid that is strongly acidic and soluble in water and polar organic solvents. A convenient, safe method for generating tetrafluoroethylene is the pyrolysis of the sodium salt Sodium salts are salts composed of a sodium cation and the conjugate base anion of some inorganic or organic acids. They can be formed by the neutralization of such acids with sodium hydroxide. Categorization Sodium salts can be categorized ... of pentafluoropropionic acid:{{cite journal , doi = 10.1016/j.jfluchem.2016.10.004, title = Preparation of tetrafluoroethylene from the pyrolysis of pentafluoropropionate salts, year = 2017, last1 = Hercules, first1 = Daniel A., last2 = Parrish, first2 = Cameron A., last3 = Sayler, first3 = Todd S., last4 = Tice, first4 = Kevin T., last5 = Williams, first5 = Shane M., last6 = Lowery, first6 = Lauren E., last7 = Bra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perfluoroalkyl Carboxylic Acid
Perfluoroalkyl carboxylic acids (PFCAs), or perfluorocarboxylic acids are compounds of the formula CnF(2n+1)CO2H that belong to the class of per- and polyfluoroalkyl substances. The simplest example is trifluoroacetic acid. These compounds are organofluorine analogues of ordinary carboxylic acids, but they are stronger by several pKa units and they exhibit great hydrophobic character. Perfluoroalkyl dicarboxylic acids (PFdiCAs) are also known, e.g. C2F4(CO2H)2.Günter Siegemund, Werner Schwertfeger, Andrew Feiring, Bruce Smart, Fred Behr, Herward Vogel, Blaine McKusick "Fluorine Compounds, Organic" Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2002. Applications Trifluoroacetic acid is a widely employed acid, used for example in the synthesis of peptides. Its esters are useful in analytical chemistry. Longer-chain perfluoroalkyl carboxylic acids, e.g. with five to nine carbons, are useful fluorosurfactants and emulsifiers used in the production of po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrafluoroethylene
Tetrafluoroethylene (TFE) is a fluorocarbon with the chemical formula C2 F4. It is the simplest perfluorinated alkene. This gaseous species is used primarily in the industrial preparation of fluoropolymers. Properties Tetrafluoroethylene is a colorless, odorless gas. Like all unsaturated fluorocarbons, it is susceptible to nucleophilic attack. It is unstable towards decomposition to carbon and carbon tetrafluoride () and prone to form explosive peroxides in contact with air. Industrial use Polymerization of tetrafluoroethylene produces polytetrafluoroethylene (PTFE) polymers such as Teflon and Fluon. PTFE is one of the two fluorocarbon resins composed wholly of fluorine and carbon. The other resin composed purely of carbon and fluorine is the copolymer of TFE with typically 6–9% hexafluoropropene (HFP), which is known as FEP (fluorinated ethylene propylene copolymer). TFE is also used in the preparation of numerous copolymers that also include hydrogen and/or oxygen, includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrolysis
The pyrolysis (or devolatilization) process is the thermal decomposition of materials at elevated temperatures, often in an inert atmosphere. It involves a change of chemical composition. The word is coined from the Greek-derived elements ''pyro'' "fire", "heat", "fever" and '' lysis'' "separating". Pyrolysis is most commonly used in the treatment of organic materials. It is one of the processes involved in charring wood.''Burning of wood'' , InnoFireWood's website. Accessed on 2010-02-06. In general, pyrolysis of organic substances produces volatile products and leaves , a carbon-rich solid residue. Extreme pyrolysis, which leaves mostly |
Sodium Salt
Sodium salts are salt (chemistry), salts composed of a sodium cation and the conjugate base anion of some Inorganic compound, inorganic or Organic compound, organic acids. They can be formed by the Neutralization (chemistry), neutralization of such acids with sodium hydroxide. Categorization Sodium salts can be categorized into: *sodium salts of carboxylic acids (e. g. sodium formate, HCOONa, the sodium salt of formic acid or sodium acetate, CH3COONa, the sodium salt of acetic acid, etc.) and *sodium salts of inorganic acids (Sulfonic acid, sulfonic acids etc.) Organic sodium salts Drugs In pharmaceutical technology acidic pharmaceutical substances are often converted into sodium salts, because they are more stable, more soluble or membrane-permeable (bioavailable) than the base compound. Examples of such sodium salts are (selection): Bispyribac, bithionol, bosentan, brequinar, bromfenac, Cefmenoxime, ceftiofur, citicoline, diclofenac , Flucloxacillin, Floxacillin, fosinopril ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
