Fatty acid by HariKrishnaShukla

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									Practical Approach in
Fatty Acid Distillation

       Hari Krishna Shukla
    Shutek Oleo S A, Costa Rica
       Basic Principles
 Boiling point difference
 Boiling & Non boiling components

 Condensation of vapors

 Heat of evaporation

 Flashing

 Mechanical entrainment
     Contents of crude fatty acids
   Aldehydes, methyle ketones, and unsaturated
    hydrocarbons,(.01 to 0.1%)
   Dissolved air,          (0.02 %)
   Moisture,                      (1 t0 3 %)
   Pitch from polymerization, (.01 to .1 %)
   Triglycerides.   ( Subject to split degree)
   Fatty acids
             Product quality

   Product quality in terms of color, heat
    stability of distillates and yield depend on
    the fact how far the process has separated
    the by product of
   Aldehydes,
   Methyle ketones,
   Dissolved air and
   Unsaturated hydrocarbons.
        Nature of fatty acids
 Highly   heat sensitive ,
 Oxidation and

 Severe degradation if air
  infiltration at elevated
  temperature.
        Operating temperature ?
   Prior to dissolved gases (air) removal
          140 °C Maximum
   Prior to low boiling by product removal
          200 ° C Even Skin temperature.
   For a maximum stress of 15 Min.
        240 °C for unsaturated fatty acids,
        250 °C for saturated fatty acids.

   For few seconds only
          260 °C and Never above 260 °C
                 Prevent air ingress
   Welded connections
     Clamped      flanges with sealed welds.
        Tongue    and groove flanges
             Improved gasket material

   Seal less pumps
        Canned motor pump
        Magnetic coupling pumps

   Welded fittings, instruments etc.
                 Options available
   Structured packing
        Reduced     pressure drop
             Facilitates lower operating temperature.
   Falling film reboilers
     Reduction      in thermal stress,
        Improved     product quality,
             Improved heat transfer.
   In-built condensers
     Quick    condensation
                                                            Contd.
                Options available
   Seal less pumps
       Reduction of leak (in & out)
   Improved flange connections,
   Optimal Liquid gas ratio,
   Low rpm pumps at bottom of columns
   Optimum operating vacuum.
           Process Control
 DCS
 Forward or backward feed back control

 Multivariable process optimizer

 Mass flow meters

 Capacitance level indicators
              Processing steps

 Step   -I
   Degassing,

   Dehydration and
   Removal of low boiling components.
                                  Contd.
                    Processing steps
 Step-I
     Enough stripping section needed otherwise
          Product will have
               Bad smell,
               Poor quality
               Poor heat stability

  (Mono, di & trialdehydes are formed
   in small quantities during
   Hydrogenation.)
            Processing steps

 Step-II
   Distillation
         and / or
   fractionation   of fatty acids

                                      Contd.
            Processing steps

 Step-III
   Removal   of pitch
    High boiling substances
    Residue

    Un-split oil / fat.
               Thanks



   I will be happy to take any question

								
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