Page 1 of 3 123 LastLast
Results 1 to 10 of 21
  1. #1
    Wunja's Avatar
    Wunja is offline Registered User
    Location : The Netherlands
    Join Date
    Feb 2007
    Posts
    2,170

    Default Cool burning Meths

    I restocked my supply of methylated spirits for the Origo recently. The new batch doesn't burn hot enough to boil the kettle!

    I've compared the ingredients to the previous bottle. Both are 85% ethanol, the original contained 5% Methylated alcohol, the new contains MEK and Bitrex.

    I'm not sure if MEK is the same as Methylated alcohol or something else. These are also literal translations from Dutch, so may not be correct to the chemists here.

    Is the Bitrex a factor for the cool burning or could it be just contaminated with water etc?
    Vince
    Dutch chapter of the East Coast Forum _/)_*_

  2. #2
    Join Date
    Sep 2006
    Posts
    1,979

    Default

    MEK is methyl ethyl ketone, similar to acetone which is diethyl ketone so it should burn OK.

    Bitrex is probably something to make it a nasty taste to discourage folks from drinking it.

    In the UK they have used pyridine to denature alcohol to make meths, I suppose they still do. The methanol (methylated alcohol?) in it also makes you blind before it kills you.

    All these things should burn. You may have a duff batch, take it back and demonstrate the lack of tea making capabilities to your supplier.
    Last edited by aquaplane; 04-05-12 at 14:05.
    Bob.
    Any bull in this post may be composted.

  3. #3
    VicS is offline Registered User
    Location : Home: Kent. Boat: Chichester
    Join Date
    Jul 2002
    Posts
    31,852

    Default

    Quote Originally Posted by Wunja View Post
    I restocked my supply of methylated spirits for the Origo recently. The new batch doesn't burn hot enough to boil the kettle!

    I've compared the ingredients to the previous bottle. Both are 85% ethanol, the original contained 5% Methylated alcohol, the new contains MEK and Bitrex.

    I'm not sure if MEK is the same as Methylated alcohol or something else. These are also literal translations from Dutch, so may not be correct to the chemists here.

    Is the Bitrex a factor for the cool burning or could it be just contaminated with water etc?
    MEK is methyl ethyl ketone (or 2-butanone) CH3.CO.C2H5
    How much is present?

    Bitrex is a bitter tasting additive

    Was this bought in the UK?
    Last edited by VicS; 04-05-12 at 14:07.

  4. #4
    Join Date
    Dec 2001
    Posts
    4,804

    Default

    Bitrex is just the stuff they put in to make it unpalatable / drinkable I expect it would be in very low concentrations and should not affect the burning. MEK Methyl Ethyl Ketone should actually aid burning and I expect that is the reason for it's inclusion. All in all no reason from what you describe to suggest a problem with the alcohol it's most likely that it's to do with the combustion mechanism and lack of air, not familiar with the Origo so maybe someone else can help on that front but I would not go looking at the fuel if it is what you describe.

  5. #5
    Wunja's Avatar
    Wunja is offline Registered User
    Location : The Netherlands
    Join Date
    Feb 2007
    Posts
    2,170

    Default

    Quote Originally Posted by VicS View Post
    How much is present?
    It doesn't say.

    I should probably say, that it is sold as a cleaner, rather than a fuel.
    Vince
    Dutch chapter of the East Coast Forum _/)_*_

  6. #6
    Wunja's Avatar
    Wunja is offline Registered User
    Location : The Netherlands
    Join Date
    Feb 2007
    Posts
    2,170

    Default

    Quote Originally Posted by petehb View Post
    All in all no reason from what you describe to suggest a problem with the alcohol it's most likely that it's to do with the combustion mechanism and lack of air, not familiar with the Origo so maybe someone else can help on that front but I would not go looking at the fuel if it is what you describe.
    The only thing to have changed is the fuel. 20 minutes earlier, I boiled the kettle for tea with no problem. Refuelled the burner from the new bottle and nada. Tried the other burner with the new fuel and zip. No TEA!
    The new meths does a moderate job of softening the adhesive on sticky backed neoprene seals though.
    Vince
    Dutch chapter of the East Coast Forum _/)_*_

  7. #7
    VicS is offline Registered User
    Location : Home: Kent. Boat: Chichester
    Join Date
    Jul 2002
    Posts
    31,852

    Default

    similar to acetone which is diethyl ketone.
    No! its propanone CH3.CO.CH3

  8. #8
    Join Date
    Sep 2006
    Posts
    1,979

    Default

    Quote Originally Posted by VicS View Post
    No! its propanone CH3.CO.CH3
    I stand corrected, it's dimethyl ketone.

    We only use it for washing up usually.
    Bob.
    Any bull in this post may be composted.

  9. #9
    Join Date
    Jul 2009
    Posts
    10,173

    Default

    Alcohol 'absorbs' water so maybe that's the problem - water content too high.
    'The lyf so short
    the arte so long to lerne.'

  10. #10
    Join Date
    Nov 2009
    Posts
    1,564

    Default

    Quote Originally Posted by parsifal View Post
    Alcohol 'absorbs' water so maybe that's the problem - water content too high.
    It seems unlikely that this would affect the burn temperature if it still lights and burns OK.

    Allow 20 mls to evaporate in a dish and see if there is water left behind as the alcohol will evaporate before the water. You could speed this up by burning but don't allow the body of liquid to become hot enough to evaporate the water.

    Richard

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •