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Information @ a Glance         

General

  • The acrylonitrile is a colorless to pale yellow liquid and volatile liquid that is soluble in water and most common organic solvents such as acetone, benzene, carbon tetrachloride, ethyl acetate, and toluene.
  • It is liquid, man-made chemical with a sharp, onion- or garlic-like odor. It can be dissolved in water and evaporates quickly.
  • The acrylonitirle catalysts are the metal oxide containing catalysts for ammoxidation of propylene to acrylonitrile.
  • Acrylonitrile may be found in the soil, water, or air near industrial sites where it is made, or at hazardous waste sites where it has been disposed of.

Process

  • Acrylonitrile (AN) is used as a raw material in acrylic fibers, ABS resin, AS resin, synthetic rubber (NBR), acrylamide and other materials.
  • In the early manufacturing processes acetylene and hydrogen cyanide (HCN) were used as a raw material.
  • Nearly all of the acrylonitrile (ACN) produced in the world today is produced using the SOHIO process for ammoxidation of propylene and ammonia.
  • In the standard SOHIO process, air, ammonia, and propylene are introduced into a fluid-bed catalytic reactor operating at 5-30 psig and ~400-510°C (750-950°F).

Technology

  • BAT for acetonitrile is to recover and purify it when a market is available, or to burn it with heat recovery (current world market of acetonitrile is significantly smaller than its production during acrylonitrile manufacture).
  • Glyclean® AN usually require only minimal retrofit that could provide significant benefits in reducing polymer formation, waste management and product quality.
  • The Quantra FT-ICR mass spectrometer and sampling system, it is now possible to effectively master this challenging task.
  •  Quantra can handle high water contents and complex sample mixtures, and analyze components previously not seen by gas chromatographs.

Market

  • In the US downstream inventory build and an outage in a downstream unit led to a substantial volume of acrylonitrile, possibly as much as 20,000 tons, being sold on the spot market.
  • Millions of pounds per year of acrylonitrile. Over 90 percent of world acrylonitrile capacity is based on the Sohio process: ammoxidation of chemical-grade propylene.
  • The acrylonitrile business is heavily dependent on exports. From 1990 until the end of 1997, exports were more than 1 billion pounds per year, serving a rapidly growing acrylic fiber and styrenics industry in the Far East.

Application

  • Acrylonitrile’s most important use is in polymerization to polyacrylonitrile used as synthetic fibers in the textile industry.
  • It is used in manufacture of a variety of products including plastics, acrylic fibres and synthetic rubber.
  • Acrylonitrile (AN2) is widely used in the production of acrylic and modacrylic fibers, plastics, rubbers, resins, and as a chemical intermediate in the synthesis of many other industrial products.
  • Early epidemiological studies have suggested that AN may increase the incidence of lung, colon, and stomach cancers among exposed workers.

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