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  • Users: wati
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  1. wati

    Air bubbles in crystallization solution ??

    I use marine propeller stirrer and a draft tube in my vessel.After cooling (@ 50oC steady state) I take sample out for a CSD measurement in a laser diffraction analyser also @ 50oC. During measurements I encounter 2 problems: 1) some bubbles and impurities in my sample beaker give bad CSD...
  2. wati

    Air bubbles in crystallization solution ??

    Thanks, But its a vessel with about 5L saturated solution. First I tried diffent speed on agitating, hovewer without any specific results of reducing bubbles.Then I tried to insert the probe after I filled the vessel with sat. solution and adjust the for probe about 40-45 degrees, while shaking...
  3. wati

    Air bubbles in crystallization solution ??

    Dear all, I'm doing a experiment with cooling crystalization in a small baffled vessel (stirred). From my probe i notice air bubbles (trap) in my solution which is not desired. How can i easily remove these bubbles.Cooling from 55 to 50deg.C. Any suggestion /advice is welcome! Thanks wati
  4. wati

    design subsea pipeline

    Thanks everyone with full of information.. I will read them carefully and come back to you all. Rgds, wati
  5. wati

    Shutting and killing a well in phases

    Its about a producing well. If for instance a well has to be shutted due to e.g maintenance operations in the wellhead or failure downhole how the shutting and killing process will take place. I understand that a heavy mud is used.
  6. wati

    Shutting and killing a well in phases

    Hi, I don't understand how a well is shutted and killed. What is the "kill phase" diagram and can anyone explain to me?. Any information lecture notes, graphs,material attached are appreciated. Thanks
  7. wati

    equipment and piping for pp or pe plant

    Hi, Yes, Polypropylene and Polyethylene process.
  8. wati

    gas to liquid rate in MDEA gas sweetening system

    Dear all I think ASPEN is ok if all thermodynamic properties of the components are available. However you may create a subroutine in e.g.Fortran for better reliable and accuracy results, but thats a long road to go !! I gues you can retrieve the VLE parameters through results. I have some...
  9. wati

    design subsea pipeline

    Thanks for all information, But can we design a marine pipeline for transporting oil and/or gas similar as process pipeline, onshore and/or offshore ?? Thanks
  10. wati

    Exploration and Production

    Dear all, Because of my interest in oil and gas and petrochemical I would like to know everything about the upstream: exploration and production of oil and gas and hydrocarbon I will appreciate any information, presentation material or lecture material from university (thinking of petroleum...
  11. wati

    Vapour Pressure of Biodiesel

    Can you find a component with almost similar thermodynamic properties and do an approximation calculation? In perry chemical handbook for example?
  12. wati

    effect of seeding in crystallysers

    Thanks m777 But still its unclear to me: "The consequence is that you have less nuclei in your solution and more supersaturation is turned to the growth of crystals". How come that less nuclei results in crystal growth (volume increasing).Does seeding acts as an actuator? Can you give me a...
  13. wati

    effect of seeding in crystallysers

    Dear all, Can anyone tell me more about seeding techniques and the effect in evaporative crystallizers ? Thanks
  14. wati

    gas to liquid rate in MDEA gas sweetening system

    This issue seems very interesting to me , can you give more information ?
  15. wati

    Vapour Pressure of Biodiesel

    Can you calculate Pvap by using Antoine equation ?
  16. wati

    Should Engineers have access to CAD

    A drafter is not an engineer An engineer is not an drafter But in my experience..I am a drafter and an engineer, but I always spent my worktime making design calculations,process simulation check PFD and P&ID,s etc. Although I am able to create and modify drawings comply client standards, we...
  17. wati

    equipment and piping for pp or pe plant

    Hi, Can anyone tell me which main equipments and piping are use for pp or pe production eg. a PFD or P&ID.. and process description ?? thanks
  18. wati

    design subsea pipeline

    Hi, can anyone tell me how to design a subsea pipe line for transporting oil or gas ... some basic design and related information (typical for any condition) Thanks, wati
  19. wati

    convert word in pdf

    Thanks everyone for your advice.I will try what cadstudent suggests, think this is the most simple way. thanks.. wati
  20. wati

    convert word in pdf

    please help me to convert word and excel documents in pdf documents ..step by step any help will be appreciated

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