Naphtha

The naphtha is an oil cut extracted by direct distillation. There exist three kinds of naphtha:

  • the light naphtha of final point 80°C or 100°C (not final= final temperature of distillation, PF)

  • the heavy naphtha of initial point 80°C or 100°C and final point 150°C or 180°C,
  • the total naphtha which is the sum of the two first.

Light naphtha is used as a basis in the composition of the gasolines, Heavy naphtha is used in catalytic load of reforming, total naphtha can be used as load for cracking with the vapor.

Some characteristics of light naphtha and total naphtha (metric system of measurements):

  • Densité15/4,

  • TVR (Tension Reid Vapor) in g/cm ²,
    • NOR
  • clearly (Number of Octane Seeks),
  • sulfur Teneur in %Pds,
  • Teneur of RSH (mercaptans) in ppm (left per million),
  • Point of aniline in °C,
  • Teneur of aromatic of %vol.

Some characteristics of heavy naphtha (metric system of measurements):

  • Densité15/4,

  • Not flash in °C,
  • PONA in %vol. (PONA-> Paraffins, Olefins, Naphtenes, Aromatic),
  • sulfur Content in %Pds,
  • Content of RSH (mercaptans) in ppm,
  • Not of aniline in °C,
  • Pb arsenic Content (left per billion (1x1012))

See the Leitartikel: Refining of oil

Simple: Naphtha

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