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Recent content by MaNaTMoS

  1. MaNaTMoS

    Structuered Packing in Vacuum Towers Stripping Section

    Hi, qazx No need for using structured packings in VDU stripping section, since it doesn't affect flash zone operating conditions. I would expect, in such case, very serious fouling/flooding problems. Well designed and properly installed trays are more than enough. MaNaTMoS P.S. Ensure that...
  2. MaNaTMoS

    Pyrophoric Iron Formation

    Hello, Eng-Tips Can anyone suggest website or write down a consequent formulas on exact way how FeS is formed in CDU overhead coolers? When looking at Pourbaix diagram of Iron, several corrosion/solution/stabile Fe areas can be noticed. Please describe this phenomenon which causes serious...
  3. MaNaTMoS

    TAN vs NAT

    Very good, my friend; as a first step, I'm giving you a big shiny star for the right decision. I'm a passionate tobacco guy also, but I'm affraid 100 millions of stars wouldn't help me to quit smoking. Maybe I should try with drugs? Wish you good health, MaNaTMoS :o)
  4. MaNaTMoS

    Crude Oil Organic Chlorides Origin

    Hi, Orenda Desalted crude has less than 20ppm of chlorides (average). Drastic difference between desalter waste water and CDU overhead sour water chlorides content comes from, in my opinion, organic chlorides. The problem is impossibility of desalter to remove organic chlorides due to their...
  5. MaNaTMoS

    TAN vs NAT

    BTW, friend, you smoke too much! :o)
  6. MaNaTMoS

    TAN vs NAT

    Thanks, 25362 Concerning the naphthenic acid analysis and theory, I've manage to find the following (according to several sources, all available online - "CorrosionSource", "SetLaboratories", "AaChE" etc.): 1) The ASTM procedures for Total Acid Number (TAN) - also called neut number - were not...
  7. MaNaTMoS

    TAN vs NAT

    Hello, In several articles I have been reading, the subject was the difference between total acid number (TAN), determined by ASTM standard method, and naphthenic acid number (NAN), determined by mysterious (to me) "naphthenic acid titration test - NAT". What kind of test is it? Can it be found...
  8. MaNaTMoS

    Crude Oil Organic Chlorides Origin

    Thanks, 25362. Since it is impossible to remove them through desalting of crude oil, what further actions should we take? Corrosion and fouling problems become drastically bigger, due to salt decomposition to form HCl. What percentage of total chlorides content goes on organic chlorides in raw...
  9. MaNaTMoS

    Crude Oil Organic Chlorides Origin

    Hello, Eng-Tips Does anyone know origin of organic chlorides in crude oil? What is the average organic/anorganic chlorides ratio in crude (REB, for example), and is there any relation between crude origin and organic chlorides content? Which chemical compounds/species of chlorine are mostly...
  10. MaNaTMoS

    CDU Waterwash Design

    Hello, Eng-Tips What are the most important parameters when designing CDU overhead waterwash system? I'm interested in every detail - wash water quality, injection point, water dosing control scheme, water distribution arrangement (nozzles) etc. We use NH3 for overhead acid neutralisation and...
  11. MaNaTMoS

    CDU Overhead Condenser Corrosion

    Sorry, there was a writing error in the previous post (about "first water dropplet"); I wanted to say - high acidity and LOW pH. Maybe I just work too much. :o) Regards
  12. MaNaTMoS

    CDU Overhead Condenser Corrosion

    Dear Ponderer, there will always be "cold" (local) spots at the inlet of 1st stage condenser, where corrosion will take place, caused by high pH value of so called "first water droplet". To avoid this, continuous waterwash injection point should be moved to the inlet of 1st condenser, at...
  13. MaNaTMoS

    Paraphinic & Naphthenic Crude Comparison

    Dear Jeff, thank you for your reply. Crude assays and API tables represent good source for this kind of information, but I was looking for something else, actually. Are there any ways to calculate and predict pour point values for different products/fractions, based on API gravity/ASTM...
  14. MaNaTMoS

    Paraphinic & Naphthenic Crude Comparison

    Hello to members and visitors, I have one rather general question to ask, but I'm interested in every detail I can find out. The question is about pour point values of vacuum distillation unit products: LVGO, HVGO, TGO (or stripped part of vacuum resid) and vacuum residue itself, from different...
  15. MaNaTMoS

    Steam Flow Control

    Thanks, I have seen this web site before, it's very good. And Mr Kojak is dangerous dude, I can say that for sure:o)
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