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small quantity of KOH - anyone want to share

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  • #1

    small quantity of KOH - anyone want to share

    HI there - as topic suggests -- i would like a small quantity of KOH - i have a large bag of Caustic soda - but my base oil is animal fat / lard - and all i am getting from my biodiesel is a LOT of soap and very little biodiesel - someone has suggested that KOH is better and produces less soap (end product gives me about 4 litres of bio from 16 litres - so currently not worth the effort )

    so i am just looking for maybe 1 kg for making a few small batches - can anyone help ?

    I am in the hoxton park area ( west of liverpool )

    thanks

    Boc
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  • #2
    Re: small quantity of KOH - anyone want to share

    Do you ever visit the Southerland area?
    George

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    • #3
      Re: small quantity of KOH - anyone want to share

      Reacting with KOH or NAOH should not make any difference to the amount of soap created.

      What does make a difference are:
      • Water in the reaction - This is THE cause of excessive soap production.
      • Free Fatty Acids - These need to be neutralised to allow the catalyst portion of the caustic to enhance the speed of reaction.


      If your oil titrates above 10 using NaOH or 14 using KOH, I recommend that you use a 2 stage process, with an Acid reaction to esterify the FFA (into biodiesel) and to reduce soap creation during the Base reaction transesterifying the oil into biodiesel.

      Tallow with 10% FFA produces as much soap as Canola with 10% FFA.
      Are you titrating the oil?
      What is your titration amount of NaOH?

      You should research drying your oil, and incorporate a drying step before reaction. You may also wish to search for tests to determine water content.
      You might like to start at this website: Welcome - Collaborative Biodiesel Tutorial Website
      Search Keywords : "Drying washed biodiesel" (same process can be used to dry WVO) and "testing for water"
      Tony
      Tony From West Oz
      Tony From West Oz
      Vice Chairperson of WARFA
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      Last edited by Tony From West Oz; 22 October 2006, 10:35 PM. Reason: Checked link operation and keywords
      Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

      Current Vehicles in stable:
      '06 Musso Sports 4X4 Manual Crew Cab tray back.
      '04 Rexton 4X4 Automatic SUV
      '2014 Toyota Prius (on ULP) - Wife's car

      Previous Vehicles:
      '90 Mazda Capella. (2000 - 2003) My first Fatmobile. Converted to fun on veggie oil with a 2 tank setup.
      '80 Mercedes 300D. 2 tank conversion [Sold]
      '84 Mercedes 300D. 1 tank, no conversion. Replaced engine with rebuilt OM617A turbodiesel engine. Finally had good power. Engine donor for W123 coupe. (body parted out and carcass sold for scrap.)
      '85 Mercedes Benz W123 300CD Turbodiesel
      '99 Mercedes W202 C250 Turbodiesel (my darling Wife's car)[sold]
      '98 Mercedes W202 C250 Turbodiesel (my car)[sold]
      '06 Musso Sports Crew Cab well body. [Head gasket blew!]
      '04 Rexton SUV 2.9L Turbodiesel same as Musso - Our Family car.
      '06 Musso sports Crew Cab Trayback - My hack (no air cond, no heater).

      Searching the Biofuels Forum using Google
      Adding images and/or documents to your posts

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      • #4
        Re: small quantity of KOH - anyone want to share

        Hi ozboc,
        Yes i do purchased a bag of koh the other day and you are welcome to some no problems.I had others help me start right here so its only fair to help out other people in need.Im in the Liverpool area as well.I also sent you a pm for you to look at with my mobile no.
        Thanks Johnno

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